TW580554B - Natural gas liquefaction - Google Patents

Abstract

A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled, expanded to an intermediate pressure, and supplied to a distillation column. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to low pressure to form the liquefied natural gas stream.

Description

580554 A7 B7 V. Description of the invention () Background of the invention The present invention relates to a natural gas or other methane-rich gas treatment process, so as to obtain a liquid natural gas stream (Liquefied natural gas, LGN), the liquid natural gas stream contains high purity Methane and a liquid gas stream which is primarily a hydrocarbon gas heavier than methane. The applicant hereby claims all the contents and benefits of the provisional application No. 60/2 9 6,8 48 filed on June 8, 2001 under US Code 35 and Article 119 (e). Natural gas is recovered from deep wells drilled in underground storage tanks. Its main component is methane. In other words, natural gas is a gas with a methane content of more than 50% by mole. Depending on the specific underground storage tank, the natural gas also contains relatively small amounts of heavy hydrocarbons such as ethane, propane, butane, alkane, and the like, as well as water, hydrogen, nitrogen, carbon dioxide, and Other gases. Most solitary gases are processed as gases. The most common method is to transfer natural gas from the upper part of the well to the gas treatment site, and then Θ high-pressure gas transmission pipeline to the consumer's home. However, in the case of _ $, it must be used, and it is better that the natural gas is liquefied before it is transmitted, used, or used. For example, 'in remote areas' most of the time there is no such natural gas pipeline that can transport natural gas to consumers' homes. In this case, lng, which is lower in volume than natural gas, is produced by < Ship or truck delivery significantly reduces delivery costs. Another case where liquid natural gas is more suitable is the case where the Pan 4 Skyfly gas system is used as automobile fuel. In metropolitan areas, page 4 This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before writing this page) System 580554 A 7 -------- B7 —______ 5. Description of the invention () (Please read the notes on the back before filling this page) Can provide economic LNG sources, there are many buses, taxis, small cars Or trucks can start with LNG as fuel. Compared with vehicles that use high-molecular-weight hydrocarbons such as gasoline or diesel engines to burn fuel, this type of LNG-fueled vehicles' Combustion, so the degree of air pollution caused by it is relatively low compared to gasoline or diesel engines with less complete combustion. In addition, if the purity of LNG is high (that is, the purity of Jiaxuan is as high as 95% Molar percentage) , The amount of carbon dioxide (greenhouse gas) produced will also be greatly reduced due to the lower carbon-to-hydrogen ratio of methane (compared to other carbocyanide fuels). The present invention relates generally to Natural gas liquefies and produces a by-product of a liquid gas stream consisting primarily of hydrocarbons heavier than methane, such as natural gas liquid streams consisting of acetylene: propane, butane, and heavy hydrocarbons , NGL) 'Liquefied petroleum gas (LPG) consisting of propane, butane, and consumer cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, or LPG, or consisting of butane and heavy hydrocarbons Condensate. The production of this liquid by-product has two very important advantages: the LNG produced will have high purity methane, and the liquid by-product is a high economic value product that can be used for other purposes. Typical analysis of the natural gas stream that can be processed by the process of the present invention, in terms of mole percentage, contains approximately 84.2% methane, 7.9% ethane and other c2 components, 4.9% propane and other C3 components, 1.0% isocyanate. Butane, 1.1% n-butane, 0.8% pentane, and the remaining proportions are made up with nitrogen and carbon dioxide. Sometimes there are some sulfur-containing gases. Many methods are known to liquefy natural gas For example, Finn, Adrian, page 5 This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 A7 B7 V. Description of the invention () (Please read the precautions on the back before filling this page) J., Grant L. Johnson, and Terry R. Tomlinson, nLNG Technology for Offshore and Mid-Scale Plants ", Proceedings of the Seventy-Ninth Annual Convention of the Gas Processors Association, pp. 429-450, Atlanta, Intellectual Property Office Employees, Ministry of Economic Affairs Printed by Consumer Cooperatives

Georgia, March 1 3-1 5, 2000 and Kikkawa, Y oshitsugi, Masaaki Ohishi, and Noriyoshi Nozawa, "Optimize the Power System of Baseload LNG Plant", Proceedings of the 18th Annual Convention of the Gas Processors Association, San Antonio, Texas, March 12-14, 2001, describes many such methods. U.S. Invention Patent Nos. 4,445,917; 4,525,185; 4,545,795; 4,755,200; 5,291,736; 5,363,655; 5,365,740 No. 5,600,969; No. 5,615,561; No. 5,651,269; No. 5,75 5,114; No. 5,893,274; No. 6,014,869; No. 6,062,041; No. 6,1 19,479; No. 6,125,653; Many related processes are also described in Nos. 6,250, 1 05 B1; 6,269,655 B1; 6,272,882 B1; 6,308,53 1 B1; 6,324,867 B1; and 6,347,532 B1. These methods are generally Includes cooling, condensation, and expansion steps to purify natural gas (removal of water and troublesome substances such as carbon dioxide and sulfides) ). The cooling and condensation of natural gas can be achieved in many ways. "Cascade refrigeration" refers to natural gas and several types of refrigerants (boiling points are lower than one, such as propane, ethane, and methane). Steps of heat exchange with each other. Alternatively, you can also apply a single page 6 of this paper size to the Chinese National Standard (CNS) A4 specification (210x297 mm) 580554 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 5. Description of the invention () Cold coal This heat exchange step is achieved by volatilization at several different pressures. "Multi-component refrigeration" is the step of heat exchange between natural gas and one or more cold coal fluids composed of different single cold coal components. Natural gas expansion can be achieved by isenthalpy (for example, Joule-Thomson expansion) and isentropic expansion (for example, work-expansion turbine). No matter which method is used to liquefy natural gas, it is generally necessary to remove a considerable proportion of heavier hydrocarbons than methane before liquefying a methane-rich gas stream. The reasons for doing this include controlling the heating value of the LNG stream and the value of these heavy hydrocarbon products themselves. Unfortunately, few people value the efficiency that this hydrocarbon removal step can bring. In accordance with the present invention, the inventors have discovered that careful integration of this hydrocarbon removal step into the LNG liquefaction process can produce LNG and a separate heavy hydrocarbon liquid stream with lower thermal energy requirements than previous processes. . Although the process of the present invention can be operated at a low pressure, it is preferably operated at a pressure of the feed gas between 400 to 1,500 psia [2,758 to 10,342 kPa (a)] or higher. Brief description of the drawings In order to make the reader better understand the present invention, the following examples and drawings are attached as reference materials. The description of the figure is as follows: Figure 1 is modified according to the present invention to produce NGL by-products at the same time. Page 7 The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297). (Please read the precautions on the back before filling (This page) Order-· 580554

V. Description of the invention (弋 Flow chart of natural gas liquefaction plant; Section 2 [g [g 疋 is used to explain the pressure-enthalpy phase diagram of benzene, which is one of the advantages of benzene invention over the previous agent; 3 ιρ | The present invention changes the natural gas body liquefaction process to the applicable natural gas body fluid chemical waste that can simultaneously produce NGL by-products in the present invention; Figure 4, Figure 4 inserts another margin. According to the present invention, the natural gas body liquefaction process is changed to apply the present invention. Diagram of a natural gas liquefaction plant that produces LPG by-products at the same time; Figure 5 interpolates another diagram of a natural gas body liquefaction plant in accordance with the present invention that is adapted to the present invention and can simultaneously produce concentrated by-products; Figure 6 depicts A diagram of another natural gas body liquefaction plant according to the present invention that is adapted to the present invention and which can simultaneously produce liquid stream by-products is developed. Figure 7 depicts another method of changing the natural gas body liquefaction process to the present invention. Diagram of a natural gas liquefaction plant that also produces liquid stream by-products; Figure 8 depicts another modification of a natural gas liquefaction process in accordance with the present invention. Diagram of a natural gas liquefaction plant capable of simultaneously producing liquid stream by-products when applied to the present invention; FIG. 9 depicts another diagram of a natural gas body liquefaction plant adapted to the present invention to simultaneously produce liquid stream by-products according to the present invention The paper size applies to the Chinese National Standard (CNS) A4 specification (210X 297 mm) (Please read the precautions on the back before filling out this page) Order · Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives 580554 A7 B7 V. Description of the invention () (Please read the precautions on the back before filling out this page) Figure 10 depicts another natural gas body in which the liquefaction process of a natural gas body is changed to a natural gas body that can simultaneously produce liquid by-products according to the present invention. Diagram of a liquefaction plant; Figure 11 depicts another diagram of a natural gas body liquefaction plant in which the natural gas liquefaction process is adapted to the present invention which can simultaneously produce liquid stream by-products; Figures 12 and 12 depict another The natural gas liquefaction process is changed to a diagram of a natural gas liquefaction plant that can simultaneously produce liquid stream by-products according to the present invention; Figure 3 depicts another diagram of a natural gas liquefaction plant in which the natural gas liquefaction process according to the present invention is adapted to the present invention, which can simultaneously produce liquid stream by-products; Figure 14 depicts another method of changing the natural gas liquefaction process in accordance with the present invention to Diagram of a natural gas liquefaction plant capable of simultaneously producing liquid stream by-products when applied to the present invention; Figure 15 depicts another natural gas body liquefaction plant in accordance with the present invention where the natural gas body liquefaction process is adapted to the present invention which can simultaneously produce liquid stream by-products Figure 16. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 16 depicts another natural gas liquefaction plant in which the natural gas liquefaction process is adapted to the present invention and can produce liquid stream by-products at the same time. The figure depicts another natural gas body liquefaction plant in which the natural gas body liquefaction process is adapted to the present invention and can produce liquid stream by-products at the same time. Page 9 This paper size applies Chinese National Standard (CNS) A4 specification (210X297) (Centi) 580554 A7 B7 V. Description of the invention () (Please read the notes on the back before filling (This page) Figure 18 depicts another natural gas liquefaction plant in which the natural gas liquefaction process is adapted to the present invention and can produce liquid stream by-products at the same time; Figure 19 depicts another natural gas liquefaction plant according to the present invention. The gas liquefaction process is changed to a natural gas body liquefaction plant diagram that can simultaneously produce liquid stream by-products according to the present invention; FIG. 20 depicts another method for adapting the natural gas body liquefaction process to the present invention to simultaneously produce liquid stream by-products Diagram of a natural gas liquefaction plant; Figure 21 depicts another diagram of a natural gas liquefaction plant in which the natural gas liquefaction process according to the present invention is adapted to the present invention and can simultaneously produce liquid stream by-products. Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs In the following examples of the above drawings, a table is provided to summarize the flow rates calculated for each processing situation. In the attached table, for convenience, the flow rate value (how many moles per hour) has been rounded to the nearest whole number. The total flow rates shown in the table include all non-hydrocarbon compositions and are therefore generally higher than the sum of the flow rate values of the hydrocarbon compositions. Temperatures shown are those that have been rounded to the nearest integer value. It should be noted that the calculations made when comparing the processes of different drawings are based on the assumption that there is no heat exchange between the process and the environment. As the quality of insulation materials currently available on the market is very good, this assumption is quite reasonable, and it is also generally used by those skilled in the art. Page 10 This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) 580554 A7 B7 V. Description of the invention () For simplicity, the process parameters are based on the traditional British system and the national team w early-break system ( SI). Moore flow rate ratios in the table can be interpreted as road moles / hour or kilograms / hour. Energy consumption is expressed in terms of horsepower and / or thermal energy units per hour (MBTU / Hr), which is equivalent to the Mohr flow rate expressed in terms of 碚, 旲, and /. Energy consumption is measured in kilowatts (kw), * when the Mohr flow rate stated in kilograms per mole per hour. The production g is expressed in pounds per hour (Lb / Hr), which is equivalent to the molar flow rate expressed in pounds per mole per hour. The production rate is expressed in kilograms per hour (Kg / Hr), which is equivalent to the molar flow rate expressed in kilograms per hour. The drawing numbers are compared to illustrate the heat exchangers 10, 13, 24, 60 expansion valves 12, 14, 17 compressors 1 6 absorption section 18b nor (B) (propane) section 19b reflux drum 22 separator 11, 18a, 19a expansion Mechanisms 15, 61, 63 Separator / absorption column 18 Fractionation column 1 9 * Reboiler 20 ............... 嚷 ........., 玎 ... ..... # f Please read the notes on the back before writing this page) Printed Discharge Cooler 25,65,67,69 by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Airflow 3 1,3 1a, 3 2, 3 3,34,3 5,3 5a, 3 5b, 3 6,3 7,3 7a, 3 8,3 8a, 3 8b, 3 8c, 3 9,3 9a, 40, 40a, 40b, 41, 42 , 42a: 4 3,44,44 a, 45,46,47,48,49,49 a, 49b, 49c, 49d, 49e, 50,71,71a, 71b, 71c, 71d, 71e, 71f, 7lg Compressor 59 LNG storage bucket '62 Cold coal compressor 64,66,68 Page 11 This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) V. Description of the invention () Detailed description of the invention Example 1 ( (Please read the notes on the back before filling this page) See Figure 1 'I will begin to describe the process of the present invention, which is intended to produce ethane and heavy carbon in a main gas containing natural gas feed gas NGL by-product of hydride. In this simulation process of the present invention, the feed gas system enters the plant at a pressure of 90 ° F [32 ° C] and 1,285 psia [8,860 "x ^] with a gas flow of 31. If the feed gas contains carbon dioxide and / or sulfides' that would make the product non-compliant, then these must be removed by appropriate treatment (not shown). In addition, the feed stream is usually dehydrated and dried to prevent it from freezing under cold conditions. A solid desiccant is usually used for this purpose. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the feed gas stream 31 can boil the liquid in the boiler in the heat exchanger 10 with the cold gas stream and -68] [-55C] to the methane removal section (air stream 4). It is cooled by heat exchange. It should be noted that the heat exchanger 丄 0 in each of the above cases may be a combination of a plurality of single heat exchangers, or a single heat-exchanger which can be accessed multiple times, or any combination thereof. (Determining whether to use more than one heat exchanger to reduce the gas temperature will depend on many factors, but is not limited to, including the feed gas flow rate, the size of the heat exchanger, the temperature of the airflow, and others.) The cooled airflow 31a is -30 Into the separator 11 at a pressure of ° F [-34 ° c] and 1,278 psia [8,812 k £ _ajU.) ..], so that the vapor (airflow 32) can be separated from the condensed liquid (airflow 3 3). The vapor (airflow 32) from the separator 11 is divided into two airflows, airflow 34 and airflow 36, respectively. The gas stream 34 containing 20% of the total vapor is combined with the condensed liquid-gas stream 3 3 in to form the gas stream 3 5. Combined airflow 3 5 The first paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention () Through heat exchanger 1 3 It is heat exchanged with the cold coal stream 7 U and cooled to a nearly condensed air stream 35 a. The -120T | > 85 ° C], almost completely condensed gas stream 3 5 a and then passed through a suitable expansion device such as an expansion valve 14, is rapidly expanded to close to the operating pressure of the fractionation column 19 (about 465 psia [3, 206 LEaCjJJ). During the expansion process, part of the airflow will be evaporated, which will reduce the overall airflow temperature. The flow of FIG. 1 'expansion flow 35b leaving expansion valve 14 reaches a temperature of -122 ° F [-86. (3) 'and is supplied to the midpoint of the feed position of the methane removal section 19b of the demarcation tower 19. The remaining 80% of the vapor (flow 36) in the separator 11 will then enter the work expansion mechanism 15 and can be obtained from this The mechanical energy is extracted from part of the high-pressure feed. Mechanism 15 expands the vapor in an isentropic way from about 1,278 psia [8,8 12- ± Pa (a)] to the operating pressure of the branch tower. The work of expansion is used to reduce the temperature of the expanded airflow 36a to about -103 ° F [-75 ° C]. Commercially suitable expanders can effectively recover theoretically only 80-85% of isentropic expansion. Work. The recovered work is usually used to drive a centrifugal compressor (such as item 16). The centrifugal compressor can be used to recompress, for example, the airflow above the fractionation tower (airflow 38). The expanded and partially condensed airflow 36a is regarded as The feed enters the distillation column 19 at a position lower than the midpoint of the feed. The methane removal section of the fractionation column 19 is a tray containing a plurality of vertically spaced disks, one or more packed beds, or a tray. A traditional distillation column combination of solids and packed bed. In a natural gas processing plant, the fractionation column can be composed of two stages. Section 19a is a separator, which can divide the upper feed into vapor and its liquid portion, wherein the vapor is from the lower distillation section or the torrefaction. Page 13 This paper applies the Chinese National Standard (CNS) A4 specification (210X297) (Barley) " '-....... Order ......... Stupid (Please read the notes on the back before filling this page) 580554 A7 _ ___________ B7 Five Inventions printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs () (Please read the precautions on the back before filling this page) Paragraph 19b goes up and feeds the vapor of the gas above (if any) Combined to form a cooled vapor (gas stream 3 7) above the methane removal section and escape from the top of the tower at a temperature of -1 3 5 ° F [-9 3 ° C]. Contains discs or fillers, lower location The methane removal section 19b may provide an opportunity for the downward flowing liquid and the rising vapor to contact each other. The demethylation section also includes one or more reboilers (for example, reboiler 20), It can heat and vaporize the liquid flowing to the lower layer of the column to provide purified vapor flowing upward. Liquefied product gas stream 41 leaves from the bottom of the tower at 1 15 ° F [46 ° C], and in terms of the molar ratio of the bottom product, the ratio of methane to ethane in a typical bottom liquefied product is 0.020: 1. Go to the vapor above the methane section (Airflow 37) is warmed to 90 ° F [3 2 ° C] in the heat exchanger 24, and a part of the vapor above the dewarmed methane section is evacuated as the factory fuel gas (airflow 48). (The amount of fuel gas that must be pumped out is roughly determined by the amount of fuel required to drive the plant gas compressor engine and / or turbine (eg, cold coal compressors 64, 66, and 68 in this embodiment)) . The vapor (airflow 38) above this remaining warm de-methane section is compressed by a compressor M driven by expansion mechanisms 15, 61 and 63. After being cooled to 100 ° F [38 ° C] in the discharge cooler 25, the gas stream 3 8b can exchange heat with the vapor above the cooled de-methane section, that is, the gas stream 3 7 ′ in the heat exchanger 24, After being further cooled to -1 23 T [-86 ° C], the airflow 38c enters the heat exchanger 60 and is further cooled with a cold gas flow 71d. After cooling to a moderate temperature, the air flow 3 8 c will be applied. Page 14 This paper size applies the Chinese National Standard (CNS) A4 specification (210x297). 5. Description of the invention () Divided into two air flows. The first stream, air stream 49, is cooled in the heat exchanger 60 to almost condense, namely -257 卞 [_16〇1]. After it enters the power expansion mechanism 61, its mechanical energy is extracted from the air stream. The work expansion mechanism 61 can expand the liquid gas flow 49 from about 562 psU [3 878 ^] to the storage pressure of LNG in an isentropic manner (15.5 psia [107, slightly higher than atmospheric pressure. The work expansion clothing can expand the gas flow 49a] Cool to about-258 ° F [-161 ° C], after which it will be sent directly to the LNG storage bucket 62 that can store LNG products (airflow 50). Another airflow 3 8c, airflow 3 9, It is evacuated from the heat exchanger 60 at -1 6 0 T [-1 0 7. and is rapidly expanded to the operating pressure of the fractionation column 19 by an appropriate expansion valve (for example, the expansion valve 17). In the operation flow of Figure 1, the expansion gas stream 3 9 a does not volatilize, so the temperature when it leaves the expansion valve 17 will only slightly decrease to -161 ° F [-107 ° C]. After that, the The expanded air stream 39a will be supplied to the separator section 19a above the fractionation column 19. The separated liquid will become the upper feed of the methane removal section 19b. The Ministry of Economic Affairs Bureau of Intellectual Property Employees Cooperative Cooperative Printed Air Streams 3 5 and 3 8 The cooling of c is provided by a closed refrigeration cycle. The working fluid of this cycle is a mixture of hydrocarbons and nitrogen. The composition can be adjusted as required so that it can be condensed under the available cooling substrate and reasonable pressure to provide the desired cooling temperature. In this case, some people have used cooling water to condense, so in Figure 1 of the present invention In the simulation process, a cold coal mixture consisting of nitrogen, methyl bottom, ethyl acetate, propane 1, and heavy hydrocarbons was used. The composition of the gas stream is based on the Chinese standard (CNS) on page 15 of this paper. ) A4 specification (210X297) Chu 580554 A 7 _____B7 ___ 5. Description of the invention () Percent and 1: Contains approximately 7.5% nitrogen, 41% methane, 41 5% ethane, and 10% < Cinder and others are composed of heavy hydrocarbons. (Please read the precautions on the back before filling out this page.) The cooled air stream 71 printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is i0 (rF [38t:] and 607 psia [4,185 must_ (')] leave the discharge cooler 69 under pressure. Then it enters the heat exchanger 10 and cools to -31 ° F and 35 ° C] while being partially warmed by the expanded cold gas Stream 7 1 f and other cold gas streams partially condense it. Simulation of Figure 1 In terms of processes, it has been assumed that these other cold gas streams are commercially available propane cold coals of three different temperatures and pressures. After that, the partially condensed cold gas stream 71a enters the heat exchanger 13 and is partially warmed by the expanded cold gas stream. 71e is cooled to -114 卞 [-81 ° (:], and the cold gas stream (stream 71b) is cooled and condensed. The cold coal stream 71d expanded in the heat exchanger 60 is further cooled to -257T [- 160 ° C]. The cooled liquid gas stream 71c enters the work expander 63 and expands to about 34 psia [234 kPa (a) _]) as it is isentropically from about 586 psia f4,040_k_Pa (; a,] ^ To extract the mechanical energy. During the expansion process, part of the airflow was volatilized, which reduced the overall airflow temperature to approximately -263 ° F [-164 ° C] (airflow 71d). The expanded radon gas stream 71d then enters the heat exchangers 60, 13, 10 again, and as it is volatilized and heated, it provides the cooling effect of air stream 3 8 c, air stream 3 5 and cold coal (air streams 71, 71a, and 71b) . Superheated cold coal vapor leaves the heat exchanger 10 at a temperature of 93T [34 ° C] and is compressed in three stages to 617 psia [4,524 kPi⑷]. Each of these three stages (cold coal compressors 64, 66, and 68) is driven by a supplementary power supply, and is followed by a cooler (discharge cooler 65, 67, page 16). This paper applies to China National Standard (CNS) A4 specifications (210X297 male f) 580554 A7 B7 V. Description of the invention () and 6 9) Remove the heat generated by the compressor. The compressed air stream 71 from the discharge cooler 69 will return to the heat exchanger 10 again to complete the cycle. A summary of the airflow flow rate and energy loss in the process of Figure 1 is further presented in the following table:

Table I (Figure 1) Summary of gas flow rate- (lbs · mol / hour) "kg · mol / hour1 (please read the precautions on the back of tr before writing this page) Intellectual Property Bureau, Ministry of Economic Affairs, Consumer Consumption Cooperative Printed gas stream methane ethane propane butane + total 31 40,977 3,861 2,408 1,404 48,656 32 32,360 2,675 1,469 701 37,209 33 8,617 1,186 939 703 11,447 34 6,472 535 294 140 7,442 36 25,888 2,140 1,175 561 29,767 37 47,771 223 0 0 48,000 39 6,867 32 0 0 6,900 41 73 3,670 2,408 1,404 7,556 48 3,168 15 0 0 3,184 50 37,736 176 0 0 37,916 Page Ⅱ This paper applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 A7 B7 V. Description of the invention () Recovery rate ethane propane butane + production rate LNG product production rate purity * low heating value power supply 9 5.06% 100.00% 100.00% 3 0 8, 14 7 (span / hour) [308, 147 kg / hour] 6 1 0, 8 1 3 (pounds / hour) [610,813 kg / hour] 99.52% 912.3 BTU / SCF [33.99 MJ / m3] (Please read the precautions on the back before filling this page)

、 SXT frozen compression propane compression total compression

1 03,957HP

[170,904 kW]

33,815HP

[55,591 kW]

137,772 HP

[226,495 Kw] Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, and de-boiling boilers for reheating boilers at the methane stage 29,364 BTU / Hr [18,969 kW] * (calculated based on unrounded airflow rate) Page 18 Standard (CNS) A4 specification (210X297 mm) 580554 Printed by the Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of invention () The production efficiency of LNG is generally based on the required "specific power consumption (specific power consumption) ) "For comparison, which is the ratio of the total refrigeration compression energy to the total liquid product rate. The specific energy consumption of the previous technology LNg process has been published is 0.168 Hp_Hi7Lb fCL: 27 kW_

Hr / Kg] to 0 · 182 Hp-Hr / Lb [0.30 kW-Hr / Kg], which is calculated based on the operating factors of an LNG manufacturing plant for 340 days per year. Under the same reference, the specific energy consumption of the embodiment of the i-th figure of the present invention is 0. 6 i Hp-Hr / Lb [0.265 kW-Hir / Kg], compared with the previous technology, the improvement of the heart rate 1 3 %. Furthermore, it should be noted that the specific energy consumption of the previous technology is measured at a very low recovery rate and only produces LPG by-products (C3 and heavy hydrocarbons) or concentrates ((: 4 and heavy hydrocarbons) It is not measured under the conditions of the NGL liquid stream (C2 and heavy hydrocarbons) shown in this embodiment of the present invention. The previous process requires a relatively high amount of refrigeration energy to generate the NGL stream at the same time. The present invention There are two main reasons why efficiency can be improved or increased. The first factor can be understood by examining the thermodynamics of applying a liquefaction process to a high-pressure airflow such as this embodiment. Because the main composition of this airflow is a nail pit ' Therefore, the thermodynamic properties of methane can be used as a comparison between the present invention and the prior art liquefaction process. Figure 2 is a pressure-enthalpy phase diagram of methane. In most of the prior art liquefaction processes, the cooling of all air streams is in Completed at high pressure (path AB), after which the gas stream is expanded (path BC) to the storage pressure of LNG (slightly higher than atmospheric pressure). This expansion step can use a work expansion mechanism, which can typically be recovered at an ideal level The work of 75-8 0% in the expanded state. For simplicity, the paper size on page 19 of the path BC in Figure 2 applies the Chinese National Standard (CNs) a 21〇 > < 297 公 [^^ Can be installed (please read the precautions on the back before filling this page) 580554 A7

V. Description of the invention () (Please read the notes on the back before filling this page) It is shown as a complete isentropic expansion. Even so, the reduced enthalpy provided by this work expansion mechanism is still quite small, because the constant entropy of the liquid part in this phase diagram remains almost vertical. In contrast to the liquefaction cycle of the present invention, after partial cooling under high pressure (path A-A '), the air flow is expanded by work (path a, -A ") to a moderate force. (Likewise, for simplicity, , Shown as a complete isentropic expansion). The remaining cooling is done at this intermediate pressure (path A ,, -B,), and the gas flow is expanded (path B'-C) to the storage pressure of LNG. Since the slope of the constant entropy straight line is not as steep as the vapor portion in the phase diagram, the first work expansion step (path A, A ") of the present invention can significantly reduce higher enthalpy. Therefore, the total amount of cooling required in the present invention (the sum of paths A, A, and A ,, -B,) is less than the total amount of cooling required in the prior art (path AB), and it can reduce the amount of liquefaction required. Freezing energy for airflow (ie, freezing compression).

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs The second factor that can improve the process efficiency of the present invention is the excellent performance of the slow hydride steaming hall system operating under low operating pressure. In most prior art processes, the hydride removal step is performed under high pressure, typically using a scrub column with a cold hydrocarbon liquid as the adsorption stream to remove heavy gas from the incoming gas stream. Hydrocarbons. Operating the scrubbing hose under high pressure is inefficient, as it will simultaneously adsorb high amounts of methane and ethane in the gas stream, resulting in subsequent removal of the high amounts of methane and ethane from the adsorption liquid and cooling to become LNG. Part of the product. In the present invention, the hydrocarbon removal step is performed at a medium pressure with a better vapor-liquid balance, so that the desired heavy hydrocarbons in the liquid by-product can be effectively recovered. Page 20 This paper is applicable to China Standard (CNS) A4 specification (210X 297 Gongchu) 580554 A7 B7 Printed invention description by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Example 2 If the product specifications of LNG can allow more remaining in the feed gas p Ethane is recovered from the LNG product, which can be accomplished using a clever single embodiment shown in the present invention. Figure 3 shows this embodiment. Figure 3 shows the composition and conditions of the feed gas and the first The diagram is the same. Therefore, the m 1 country A ^ process can be compared with the process of the embodiment in Fig. 1. In the simulation process in Fig. 3, the cooling, separation, and expansion processes of the feed gas in the NGL recovery part are roughly Both are the same as those used in Figure 1. The feed gas enters the processing plant under the pressure of air flow 31 at 90 ° F [32 ° C] and 1,25 8 psia [8,86kPafall], and is exchanged by heat exchange for heat exchange. Device 10 with cold coal flow and -35 ° F [-37 ° C] The side of the alkane section is re-boiled and the liquid in the boiler (airflow 4 1) comes into contact and is cooled. The cooled airflow 3 1 a is at a pressure of -3 0 ° F [-34 ° C] and 1,278 psia [8,812JlEjuUX] Enter the separator 11 to allow the vapor (airflow 32) to be separated from the condensed liquid (airflow 33). The vapor from the separator U (airflow 32) is divided into two airflows, namely airflow 34 and airflow 36. Contains the overall vapor The 20% gas stream 34 merges with the condensed liquid-gas stream 33 to form the gas stream 35. The combined gas stream 35 is cooled to a nearly condensed gas stream 35a by heat exchange with the heat exchanger 13 and the cold coal stream 7 1e. The- 120T [-85 ° C], almost completely condensed air stream 3 5 a and then passed through a suitable expansion device such as expansion valve 14 to be rapidly expanded to close to the operating pressure of fractionation column 19 (about 465 psia page 21 paper size Applicable to China National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page)-Order · Line 580554 V. Description of Invention (kEAUjL). During the expansion process, such as v 广 & amp As a result, the temperature of the Shao Fen stream will be reduced by the evaporation stream. In 帛 3 _ 之 & < The temperature of the airflow 35b leaving the expansion valve 14 reaches -l22ΐ of the expansion tb 86 <:], and is supplied to the separator above the points (please read the precautions on the back before filling this page). Miscellaneous ° 19, the night body coming out of the knife will become the top feed of the decarburization section below the fractionation column 19. The remaining 80% of the vapor from the separator 11 (the gas flow% enters the work expansion mechanism 15, which can be part of this The mechanical energy is pumped in the high-pressure feed. Mechanism 15 expands the vapor from approximately 1,278 psia [8,812 "^ £ ^] to the operating pressure of the fractionation column in a nearly isentropic expansion manner, and reduces the temperature of the expanded gas stream 3 6 a to about _ 丨 〇 with the remaining expansion work. 3 times [_ 7 5 it]. The expanded and partially condensed gas stream 36a is taken as a feed from the central feed point of the pipe column into the steaming hall pipe column 19. The vapor (flow 37) above the cooled de-methane section escapes from above the fractionation column 19 at a temperature of _123 ° F [861]. Its liquid product (gas stream 41) leaves at the bottom of the column at a temperature of 11 8 F [4 8 C]. In terms of the molar ratio of the bottom product, the typical bottom liquefied product has a methane to ethane ratio of 0.020: 1 〇 The vapor (airflow 37) printed above the methane section by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is warmed to 90T [32 ° C] in the heat exchanger 24, and a part of the methane section that is to be warmed The vapor is extracted as a fuel gas for the plant (stream 48). The remaining warm vapor (gas stream 49) above the methane removal section is compressed by the compressor 16. Cool to 100 故 in the electric cooler 25 [38. (:], The air stream 4913 can pass through and cool the steam above the methane section, that is, the air stream 37 'in the heat exchanger 24 page 22. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297). 580554 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, A7 B7 V. The description of the invention () was carried out for interactive heat exchange, and was further cooled to -112 T [-80 ° C]. After that, the air stream 49c entered the heat exchange to 60 Then, it is further cooled to almost condensation with cold gas stream 71d, namely -257 ° F [-160 ° C]. After it enters the work expansion mechanism 61, the mechanical energy is extracted from the air flow. The work expansion mechanism 61 can The liquid gas stream 49d expands from approximately 583 psia [4,021 to the storage pressure of LNG (15.5 psia [107 ^ (a) 1) ') slightly above atmospheric pressure in a nearly isentropic manner. The work expansion can cool the expanded gas stream 49e to approximately- 2 5 8 ° F [-161. (:], Then it will be sent directly to the LNG storage bucket 62 that can store LNG products (airflow 50). Same as the process in Figure 1, the cooling of airflow 35 and 49c is made by Provided by a closed refrigeration cycle. The composition of this air flow is used as the circulating working fluid in the process of Figure 3. In terms of mole percentage, it contains approximately 7.5% nitrogen, 40% methane, 42.5% ethane, and 10% propane, and the others are composed of heavy hydrocarbons. Cold coal stream 7 1 to 1 〇〇T [3 8 ° C] temperature and pressure of 6 0 7 psia [· 4,185-kPaia,] left the discharge cooler 69. After entering the heat exchanger 10 was cooled to -3 1F [ -35 ° C] and partially condensed by the partially warmed expansion gas stream and other cold gas streams. In the simulation process in Figure 3, it has been assumed that these other cold gas streams are propane with three different pressures and temperatures that meet commercial standards. Cold coal. After this, the partially condensed cold gas stream 7 1 a enters the heat exchanger 1 3 and is further cooled to -1 2 1 T [-8 5 ° C by the partially warmed and expanded cold gas stream 7 1 e. ] 'Condensates and cools the cold coal almost partially (airflow 7 lb). The nearly cooled liquid stream 7 1 C enters the work expansion mechanism 6 3 and extracts its mechanical energy' and is almost 2The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) .............. Φ ........., 玎 ..... .... (Please read the notes on the back first Please fill in this page again) 580554 A7 B7 V. Description of the invention () The isentropic method has expanded from about 586 psia [4.040-kPaia "to about 34 pSia [234 kPa (; a ^]). When expanding, part of the airflow will be volatilized and the total airflow temperature will be cooled down to -263T [-164 ° C] (airflow 71d). After that, the expanded air stream 71 d enters the heat exchangers 60, 13, and 10, and as it is volatilized and heated, it provides air stream 49c, air stream 35, and cold coal (air streams 7, 1, 71a, and 71b). Cooling effect: Superheated cold coal vapor (71g air stream) leaves the heat exchanger 10 at a temperature of 93T [34 ° C] and is compressed to 617 psia [4,524 kPafa "in three stages. Each of these three stages (cold The coal compressors 64, 66, and 68) are all driven by an auxiliary power source, and then a cooler (discharge cooler 65, 67, and 69) is used to remove the heat generated by the compressor. From the discharge cooling The compressed air stream 71 of the air heater 69 will return to the heat exchanger 10 to complete the cycle. The summary of the air flow rate and energy loss in the process of Figure 3 is presented in the following table: .... .......… Miscellaneous ......... tr ......... Line 0 (Please read the precautions on the back before filling out this page) Staff Consumption of Intellectual Property Bureau, Ministry of Economic Affairs Cooperative printed page 24 This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) 580554 A7 B7 V. Description of the invention ()

Table II (Please read the notes on the back before filling out this page) (Figure 3) Summary of gas flow rate-(pounds · mole / hour) "kg · mole / hour 1 gas stream methane ethane propane butane + total 31 40,977 3,861 2,408 1,404 48,656 32 32,360 2,675 1,469 701 37,209 33 8,617 1,186 939 703 11,447 34 6,472 535 294 140 7,442 36 25,888 2,140 1,175 561 29,767 37 40,910 480 62 7 41,465 41 67 3,381 2,346 1,397 7,191 48 2,969 35 4 0 3,009 50 37,941 445 58 7 38,456 Recovery rate * Ethane printed by employees' cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 8 7.57% Propionium 9 9 .41% Page 25 This paper applies Chinese National Standard (CNS) A4 (210X297 mm) 580554 A7 B7 V. Description of the invention () Butter roasting + Production rate LNG Product production rate purity * Low heating value Power supply cold; East compression Cyan compression total compression 99.47% 2 9 6,1 7 5 (lb / hr) [296,175 Kg / hr] 6 2 5, 1 5 2 (lbs / hr) [625,152 kg / hr] 98.66%

919.7 BTU / SCF

[34.27 MJ / m3] (Please read the notes on the back before filling this page)

96,560HP

34,724HP

131,284 HP

[158,743 kW] [57,086 kW] [215,829 Kw] Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the thermal energy de-methane section and reboiler boiler 22,177 BTU / ft [14,326 kW] * (calculated based on the unrounded airflow rate) Calculating the operating factors of an LNG manufacturing plant for 340 days per year, the specific energy consumption of the embodiment of Figure 3 of the present invention is 0.153 Hp-Hr / Lb [0.2 5 1 kW-Hr / Kg], compared with the previous technology, Improved by about 10-20%. As shown in Figure 1, this improvement can be achieved by the process of the present invention, even if the paper size produced on page 26 is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 A7 B7 The product is an NGL by-product, not an LPG or concentrate by-product that would be produced by the former. (Please read the precautions on the back before writing this page.) Compared to the first figure, the amount of energy required to produce one unit of liquid product in the embodiment of the third figure of the present invention is reduced by about 5%. In terms of the available compressed horsepower, the embodiment in FIG. 3 can liquefy 5% more natural gas than the embodiment in FIG. 1 by recovering a smaller amount of C2 and heavy hydrocarbons from NGL by-products. For specific applications, choose to carry out liquefaction according to the examples in Figure 1 or Figure 3. Generally, it depends on the economic value of heavy hydrocarbons in the NGL by-product, or its corresponding value in LNG products, or the LNG. The heating specifications of the product (the heating value of the LNG manufactured by the embodiment in Figure 1 is lower than the heating value of the LNG manufactured by the embodiment in Figure 3). Example 3 Employees of the Bureau of Intellectual Property, Ministry of Economic Affairs Printed by Consumer Cooperatives If LNG's product specifications allow more of the ethane burned in the feed gas to be recovered from the LNG product, or if the liquid by-product containing ethane burned does not have market value, then this can be used. Another simple reality shown in Figure 4 of the invention Example to produce a LPG by-product gas stream. The composition and conditions of the feed gas in Figure 4 are the same as those in Figures 1 and 3. Therefore, the process of Figure 4 can be compared with the process of the embodiment of Figures 1 and 3. In the simulation process in Fig. 4, the feed gas enters the processor under the pressure of air flow 31 at 90 ° [32t] and 1,258 psia [8,860 jLg_aU]]. Page 27 This paper applies the Chinese national standard (CNS) ) A4 specification (210X 297 mm) 580554 A7 B7 V. Description of the invention () The plant is cooled to -46 ° F by heat exchange in the heat exchanger 10 in contact with cold coal flow and rapid expander liquid [- 43 ° C] (air flow 33a). The cooled gas stream 31a enters the separator 11 at a pressure of -IT [-18 ° C] and 1,278 psia [8.8 1 2 __kPa (al), so that the vapor (gas stream 32) can be separated from the condensed liquid (gas stream 33). The vapor from the separator 11 (airflow 3 2) will enter the work expansion mechanism 15 and the mechanical energy of the grapefruit in this part of the high-pressure feed will be released. Mechanism 15 expands the vapor in a manner that is almost isentropic. Expansion from about 1,278 psia [8,81 2 kP ^ UX] to about 440 psia [3,034-kJELa ^ jjLK Separator / Operating Pressure of Absorber Tower 18), using expansion work to reduce the temperature of the expanded gas stream 32a to about -8 1 ° F [-6 3 ° C]. This expanded and partially condensed gas stream 32a is taken as feed from a position below the separator / absorption column 18 and enters the absorption section 18b. The expanded gas stream is mixed with the liquid flowing down from the absorption section 18b, and then the mixed liquid stream 40 exits from the bottom of the separator / absorption column 18 at -86T 〇66 ° C]. The vapor portion of the expanding airflow passes through the absorption section and rises to contact with the cooling liquid flowing downward to condense and absorb the C3 component and the heavy hydrocarbon component therein. The separator / absorption column 18 is a conventional distillation tube column containing a plurality of vertically spaced discs, one or more packed beds, or a combination of discs and packed beds. In a natural gas processing plant, the separator / absorption tower can consist of two sections. The upper section 18a is a separator, which can divide the upper feed into vapor and its liquid portion, wherein the vapor rises from the lower distillation section or the absorption section 18b, and is separated from the vapor of the upper feed gas (if any Words: page 28 This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm)-(Please read the precautions on the back before filling out this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 580554 A7 V. Description of the invention (combined to form a cooled distilled vapor stream 37 and escape from the top of the tower. It contains a disk or packing material, a lower position of the absorption section 1 8b, and can provide liquid flowing downward and upward. The vapors contact each other to condense and absorb the C3 and heavy hydrocarbon components. The combined gas stream 40 from the bottom of the separator / absorption tower 8 is sent to the heat exchanger η by pump 26 ( Gas stream 40a), and is heated therein to cool the steam (gas stream 42) and cold coal (gas stream 71a) above the demethylation section. The combined liquid stream is supplied and becomes the central inlet of the ethane removal section 19 Before the material is heated to J4T [-3rC] It becomes the partially evaporated gas stream 40b. The separator liquid is rapidly expanded by the expansion valve i 2 to a pressure slightly higher than the operating pressure of the ethane removal section 19 to cool the gas stream 33 to -46T [-43 ° C] (gas stream 33a), After that, it can also provide the cooling effect of the incoming feed gas. After that, the gas stream 33b with a temperature of 85 ° F [29 ° C] can enter the deacetylation section 19 from below the central column feed point. In the ethane removal section In the air flow 40b and 33b, the toluene and C: 2 components will be stripped. The ethane removal section of the tower 19 with an operating pressure of 453 psia [3,123 kP ...,] also contains a plurality of vertical intervals. Tray, one or more packed beds, or a combination of trays and packed beds. The traditional steaming hall column can also be composed of two sections: an upper separator section, which can Any vapor in the top feed is removed from its liquid composition, and the vapor rising from the lower distillation section or the ethane removal section 9b is combined with the vapor part of the top feed (if any) to form a steam hall Air stream 42 leaves from the top of the tower again; and a lower-position ethane-removing section 19b containing disks or fillers, which is Can provide the opportunity for the downward flowing liquid and the rising vapor to contact each other. The ethane section 19b also contains one or page 29 (please read the precautions on the back before filling this page). Staff of the Intellectual Property Bureau of the Ministry of Economics Printed by the consumer cooperative 580554 Printed by the consumer property cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention () Multiple reboilers (for example, reboiler 20), which can heat and gasify the bottom of some pipe columns Liquid to provide purified vapor flowing upwards to remove the liquid product, namely the methane and C2 components in the gas stream 41. The typical specification of the bottom liquid product is, in terms of mole ratio, the ratio of ethane to propane is 0.020: 1 / the temperature of the liquid product gas stream 41 leaving the bottom of the column is 214 ° F [101 ° C]. The operating pressure of the ethane removal section 19 is maintained slightly higher than the operating pressure of the separator / absorption column 18. This allows the vapor (gas stream 42) above the ethane-removing section to flow at high pressure through the heat exchanger 13 and into the section above the separator / absorption column 18. In heat exchanger 1 3, the temperature is · 19 ° F [-28 ° C], the vapor above the ethane section and the combined liquid stream (air stream 40a) from the bottom of the separator / absorption column 18 and the rapidly expanding The cold coal stream (stream 71 e) is heat exchanged, cooling the stream to -89 ° F [-67 ° C] (stream 42a) and partially condensing. This part of the condensed air enters the reflux drum 22 so that the condensed liquid (air 44) can be separated from the condensed vapor (air 43). The gas stream 43 merges with the distilled vapor stream (gas stream 37), leaves the upper section of the separator / absorption column 18, and forms a cold residual gas stream 47. Condensed liquid (After the airflow 4 is pumped to high pressure by pump 23, the airflow 44a is divided into two. One is the airflow 45, which is sent to the separator section above the separator / absorption tower 18, and passes through The rising liquid in the absorption section is in contact with the cold liquid. The other gas stream is supplied to the deethane section 19 as the return gas stream 46 and flows into the deethane section 19 at a temperature of -89 ° F [-67 ° C]. Top feed page 30 This paper size is applicable to China National Standard (CNS) A4 size (210x297 mm) ......... m ......... ........ (Please read the precautions on the back before filling this page) 580554 A7 B7 V. Description of the invention () Cold residual gas (airflow 47) is -94T from 70 ° in heat exchanger 24 ( :] It is warmed to 94 ° F [34 ° C], and then a part of it (gas stream 48) is extracted as a strict fuel. The remaining warm residual gas (gas stream 4 9) is expanded by the expansion mechanism 1, 5, Compressor 16 driven by 6 1 and 6 3 compresses. After cooling to 100F [38C] in discharge cooler 25, 'this gas stream 49b can be used with cold residual gas (gas stream 47)' in heat exchanger 24 Interactive hot sex And is further cooled to _78 ° F [-61 ° C]. The air stream 49 c enters the heat exchanger 60 and is further cooled to -255 ° F [-160 ° C] by the cold coal stream 7 ld, which is almost condensed. Then, it enters the work expansion mechanism 61 and extracts its mechanical energy. The work expansion mechanism 61 can expand the liquid gas flow 49d from approximately 648 psia [4,465 to denier] to the LNG storage pressure in a nearly isentropic manner. (15 · 5 psia [107 kP ^ UX]), slightly higher than atmospheric pressure. The work expansion can cool the expanded air stream 49e to about -256 ° F [-160 ° C], after which it will be sent directly to the LNG product that can be stored. (Airflow 50) in the LNG storage barrel 62. Same as the process of Figs. 1 and 3, most of the cooling of airflows 42 and 49c is provided by a closed refrigeration cycle. The composition of this airflow is used as the cycle of the process of Fig. 4 The working fluid, in terms of mole percentage, contains approximately 8.7% nitrogen, 30% methane, 45.8% ethane, and 1 1.0% propane, and the others are composed of heavy hydrocarbons. Cold coal stream 71 Leaved the discharge cooler 69 at a temperature of 100 ° F [38 ° C] and a pressure of 607 psia [4,185Ji £ jXaa]. Then it was cooled in the heat exchanger 10 -17 ° F [-27 ° C] and partially condensed by the partially warmed expansive airflow 7 1 f and other cold gas flows. On page 31, this paper applies China National Private Standard (CNS) A4 (21〇297) (Gongchu) (Please read the notes on the back before filling out this page) Print · Printed by the Intellectual Property Bureau Employee Consumer Cooperative of the Ministry of Online Economics 580554 A7 B7 V. Description of the invention () In the simulation process of Figure 4, it is assumed that these other The cold gas stream is three types of propane cold coal with different pressures and temperatures that meet commercial standards. After that, the partially condensed cold gas stream 71a enters the heat exchanger 13 and is further cooled to -89T and 67 ° C by the partially warmed and expanded cold gas stream 71e. It condenses and cools the partially cooled coal gas (airflow 7 1 b). The cold coal series was completely condensed and expanded in the heat exchanger 60 by a cold coal stream 71d further cooled to _ 25 5 ° F [-16 0 ° C]. The ultra-cold liquid stream 71c enters a work expansion mechanism 63, extracts the mechanical energy therein, and is expanded from approximately 586 psia [4,040 kPafaJ] to approximately 34 psia [23 4., k? ..... ^)]). When expanding, part of the airflow will be volatilized, and the total airflow temperature will be cooled down to -264 ° F [-164 ° C] (airflow 71d). Thereafter, the expanded air stream 71d enters the heat exchangers 60, 13, 10, and as it is volatilized and heated, it provides the cooling effect of air stream 49c, air stream 42, and cold coal (air streams 71, 71a, and 71b). Superheated cold coal vapor (71g air stream) leaves heat exchanger 10 at 90 ° F [32C] and is compressed in three stages to 617 psia [4,524 kPa (aJ). Each of these three stages (cold coal The compressors 64, 66, and 68) are all driven by an auxiliary power source, and then a cooler (discharge coolers 65, 67, and 69) is used to remove the heat generated by the compressor. From the discharge cooler 69 The compressed airflow 71 will return to the heat exchanger 10 again to complete the entire cycle. The summary of the airflow flow rate and energy loss in the process of Figure 4 is further presented in the following table: Page 32 This paper applies Chinese national standards (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling out this page)-Ordered · Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 580554 A7 B7 V. Description of Inventions Bureau employee consumer cooperative prints table III (Figure 4) Summary of gas flow rate-(pounds • moles / hour Η kilograms • moles / hour 1 gas stream methane ethane propane butane +. Total 31 40,977 3,861 2,408 1,404 48,656 32 38,431 3,317 1,83 2 820 44,405 33 2,546 544 576 584 4,251 37 36,692 3,350 19 0 40,066 40 5,324 3,386 1,910 820 11,440 41 0 48 2,386 1,404 3,837 42 10,361 6,258 168 0 16,789 43 4,285 463 3 0 4,753 44 6,076 5,795 165 0 12,036 45 3,585 3,419 97 0 7,101 46 2,491 2,376 68, 0 4,935 47 40,977 3,813 22 0 44,819 48 2,453 228 1 0 2,684 50 38,524 3,585 21 0 42,135 Page 33 (Please read the notes on the back before filling this page) This paper uses Chinese national standards (CNS) A4 specification (210X 297 mm) 580554 A7 B7 V. Description of the invention (recovery rate propane butane · + production rate LNG product production rate purity * low heating value power 99.08% 100.00% 197,05 1 (crushed / hour ) [197,051 kg / hour] 7 2 6, 9 1 8 (crushed / hour) [726,918 kg / hour] 91.43% 969.9 BTU / SCF [36.14 MJ / m3] (Please read the precautions on the back before filling this page) Frozen compression propane compression total compression

95,424HP

28,060HP

123,484 HP

[158,876 kW] [46,130 kW] [203,006 Kw] Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Employee Consumption Cooperative, printed thermal energy to the methane section and reboiled the boiler 5 5,070 BTU / m [35,575 kW] (calculated based on the unrounded airflow rate) 34 pages of this paper are applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 V. Description of the invention (calculated based on the operating factors of an LNG manufacturing plant of 34 days a year, the embodiment of the fourth figure of the present invention is specifically- The consumption of the performance source is 143 Hp-Hr / Lb [0.23 6 kW-Hr / Kg] 'Compared with the previous technology, it is improved by about -27-27 //. Compared to the first and third figures, the present invention The embodiment of Fig. 4 reduces the amount of energy required to produce one unit of liquid product by about 6%-u%. Therefore, for a limited available compression horsepower, the embodiment of Fig. 4 recovers only C3 and heavy carbon Hydride is a by-product of LPG, and it can liquefy 5 more natural gas than in the embodiment of Fig. 1 and liquefy natural gas by 5% more than in the embodiment of Fig. 3. For a specific application, choose the i, The examples in Figure 3 or Figure 4 are used for liquefaction. Generally, the heavy hydrocarbons in the NGL by-product are determined. Economic value of the product, or its corresponding value in the LNG product, or the heating specifications of the LNG product (the heating value of the LNG manufactured in the embodiment of Figs. I and 3 is more than that produced in the embodiment of Fig. 4 The heating value of lng comes out to be low) (Please read the precautions on the back before filling this page) Order · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Example 4 If the product specifications of LNG can be allowed to remain Ethylene and propane in the feed gas are recovered from the LNG product, or if the internal byproducts and liquid by-products of propane have no market value, another simple embodiment shown in Figure 5 of the present invention can be used to Manufacture of concentrate by-product gas flow. The composition and conditions of the feed gas in Figure 1 are similar to those in Figures 1, 3, and 4. Therefore, the process of Figure 5 can be compared with the process of the embodiments in Figures 1, 3, and 4. For comparison, page 35. This paper size applies the Chinese National Standard (CNS) A4 (210X297 mm) line 580554 A7 B7 V. Description of the invention () In the simulation process in Figure 5, the feed gas is 31 to 90T with a gas flow of 31 [ 32 ° C] and 1,258 psia [8,860 l £ ^ jUX] pressure into the processing plant, heat exchange in the heat exchanger 10 with cold coal flow, -37 ° F [-38 ° C] high-pressure rapid expansion separator liquid (air flow 33b), And -37T [-38 ° C] in the medium pressure of the rapidly expanding separator liquid (airflow 39b) to be cooled. The cooled airflow 31a at -30 ° F [-34 ° C] and 1278 psia [8,812 kZJLUjL] It enters the separator 11 under pressure so that the vapor (gas flow 32) can be separated from the condensed liquid (gas flow 3 3). The vapor (gas stream 32) from the high-pressure separator 11 enters the work expansion mechanism 15 and mechanical energy can be extracted from this part of the high-pressure feed. Mechanism 15 expands the vapor from approximately 1,278 psia Γ8,812 kPa (aT | to approximately 635 psia [4,7S kPa, a ") in a nearly isentropic expansion manner, and reduces the temperature of the expanded gas stream 32a to approximately ·· by the work of expansion. 83T [-64 ° C ^ The expanded and partially condensed gas stream 32a enters the medium pressure separator 18, so that the vapor (gas flow 42) can be separated from the condensed liquid (gas flow 39). The medium pressure separator liquid (Airflow 39) The expansion valve 19 quickly expands to a pressure slightly higher than the operating pressure of the depropanizer 19, and then cools the airflow 39 to -108 under [108] before entering the heat exchanger 13 (-). (Airflow 393) At the same time, it also provides the cooling effect of residual gas stream 49 and cold coal stream 7 1 a, and then enters the heat exchanger 10 as described above to provide the cooling effect of the feed gas. After that, the temperature is -15 ° F [-26 ° C] The air stream 39c enters the propane separator 19 above the feed point of the central column. The condensed liquid from the high pressure separator 11 is the air stream 3 3 to expand. Page 36 This paper applies the Chinese National Standard (CNS) A4 specification ( 210X 297 mm) (Please read the notes on the back before filling this page) Order Printed by the Consumer Property Cooperative of the Smart Property Bureau 580554 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention () The valve 12 quickly expands to slightly higher than the operating pressure of the propane remover 19 and enters the heat exchanger 13 The air stream 33 is cooled to -93. 70 and 70. (:) (air stream 3 3 a), while providing the cooling effect of the residual gas stream 49 and the cold coal stream 7a, and then enter the heat exchanger 1 as described above. In order to provide the cooling effect of the feed gas, the air stream 33c at a temperature of -50 ° F [10 ° C] then enters the propane dehydrator 19 below the feed point of the central column. In the depropane section, the air stream 39c and 3 The methane, C2, and C3 components in 3c will be stripped. The propane-free propane section of tower 19, which has an operating pressure of 3 85 psia [2,6 54Jl £ jjUX], also contains a plurality of vertically spaced disks. Distillation column with packed products, one or more packed beds, or a combination of trays and packed beds. The depropane section column can also consist of two sections: an upper separator section 19a, which can feed the top end Any vapors in it are removed from their liquid composition and are removed from the lower distillation section or depropane The rising steam from section 19b is combined with the steam portion of the top feed (if any) to form a distillation stream 37 and then leave from the top of the tower; and a lower propane desulfurization section containing disks or fillers 19b, which provides the opportunity for the liquid flowing downwards and the vapor rising upwards to contact each other. The depropane section 19b also contains one or more reboilers (e.g., reboilers 20), which can heat and gas The liquid at the bottom of a part of the column is changed to provide purified vapor flowing upward to remove the liquid product, namely the methane, C2 component, and C3 component in the gas stream 41. The typical specification of the bottom liquid product is, in terms of mole ratio, the ratio of propane to butane is 0 · 02 0 ·· 1. The temperature of the liquid product gas stream 41 exiting the column bottom was 286 ° F [141 ° C]. The temperature of the upper vapor stream 37 exiting from the propane-free section 19 is 36 ° F [2 page 37 This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 male cage) ............... Feng ........ 耵 ......... Disgrace (please read the notes on the back before filling this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 580554 A7 B7 V. Description of Invention () T:], and cooled to a degree of partial condensation by commercial propylene-fired cold coal in the reflux condenser 21. The partially condensed gas stream 3 7 a enters the reflux drum 22 (reflux drum 22) at a temperature of 2 ° F [17 ° C] 'so that the condensed liquid (flow 44) can be separated from the condensed vapor (flow 43). . The condensed liquid (airflow 44) is pumped by pump 23 to the top feed point of the propane remover 19 and is used as a turbulent flow 44a. The uncondensed vapor (airflow 43) from the return drum 22 is warmed to a temperature of 94T [34 ° C] in the heat exchanger 24, after which a part (airflow 48) is evacuated as factory fuel. The remaining warm residual gas (air stream 38) is compressed by a compressor 16 driven by expansion mechanisms 15, 61 and 63. After cooling to 100 ° F [38 ° C] in the discharge cooler 25, the gas stream 38b can be further exchanged with cold residual gas (gas stream 43) 'in the heat exchanger 24 and further Cool to 15F [-9 ° C].

The gas stream 38c is combined with the intermediate pressure separation gas vapor (gas stream 42) to form a cold residual gas stream 49. The air stream 49 enters the heat exchanger 13 and is separated by the separator liquid (air streams 39 & and 33 &) and the aforementioned cold coal stream 71 from -38 °? 39 ° (:) to -1 02 T [-74 ° C] The partially condensed air stream 49a enters the heat exchanger 60 and is further cooled to -254 ° F [-159C] 'by almost condensing β, and then enters the work expansion mechanism 61' and extracts the mechanical energy therein. The work expansion mechanism 61 can expand the liquid gas flow 49b from approximately 62 1 psia [4282 kiAUX] to the storage pressure of LNG in a nearly isentropic manner (15.5 psia [107 kPa (All), slightly higher than atmospheric pressure. Work expansion) The expansive air stream 49c can be cooled to about -2 5 5 ° F [-159 ^:], after which it will be sent directly to the storable LNG. Page 38 This paper applies Chinese National Standard (CNS) A4 (210X297 mm) ) .............. Meal ......... 、 玎 ......... ^ 0 (Please read the notes on the back before filling this page ) 580554 A7 B7 V. Description of the invention () The LNG storage barrel 62 of the product (airflow 50). As in the process of Figs. 1, 3 and 4, most of the cooling of airflow 49 and the overall cooling effect of airflow 49a are made by one. Provided by a closed refrigeration cycle. The composition is used as the circulating working fluid in the process of Figure 5. In terms of mole percentage, it contains about 8.9% nitrogen, 34.3% methane, 41. 3% ethane, and 1 1.0% propylene, Others consist of heavy hydrocarbons. Cold coal stream 71 leaves the discharge cooler 69 at a temperature of 100 ° F [38 ° C] and a pressure of 607 p si a [4 "85 kPa ⑷]. It then enters the heat exchanger In 10, it is cooled to -30 ° F [-34 ° C] and partially condensed by the partially warmed expansion gas stream 71f and other cold gas streams. In the simulation process in Figure 5, these other cold gas streams have been assumed It is commercial propane-based three different pressures and temperatures of propane cold coal. After that, the partially condensed cold gas stream 7 1 a enters the heat exchanger 1 3 and is further cooled by the partially warmed and expanded cold gas stream 7 1 e. -102 ° F [-74 ° C], condenses and cools the partially cooled coal (gas stream 71b). The cold coal series is completely condensed and expanded in the heat exchanger 60, the cold coal stream 71d is further cooled to -254 ° F [-159 ° C]. The ultra-cold liquid stream 71 c enters a work expansion mechanism 63, extracts its mechanical energy, and is used as The near isentropic method expands from about 586 psia [4,040 kPa (a)] to about 34 psia [234 kPa (a >]). During expansion, part of the air flow will be volatilized, and the total air temperature will be cooled down to -264 ° F [-164 ° C] (air flow 7ld). After that, the expanded air stream 71 d enters the heat exchangers 60, 13, and 10, and as it is volatilized and heated, it provides the cooling effect of air stream 49a, air stream 49, and cold coal (air streams 71, 71a, and 71b). , Page 39 This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) ^^ " (Please read the precautions on the back before filling out this page) System 580554 A7 B7 V. Description of the invention (), π leaves the superheated cold coal vapor (gas flow 71g) at 93T [34 ° C] / JDL heat exchanger 10, and is willing to shrink to ό17 psia in three stages [ 4,524. Each of these three phases (cold coal compressors 64, 66, and 68) is driven by a supplementary power source, and is followed by a cooler (discharge coolers 65, 67, and 69) generating the compressor Heat removal. The compressed air stream 71 from the present electric cooler 69 is returned to the heat exchanger 10 again to complete the entire cycle. The summary of the airflow flow rate and energy consumption in the process of Figure 5 is further presented in the following table: (Please read the precautions on the back before filling out this page) Printed on page 40 by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Chinese National Standard < CNS) A4 Specification (210X297 mm) 580554 A7 B7 V. Description of Invention () Table IV (Figure 5) Summary of Gas Flow Rate-(pounds · mole / hour) f kg · mole / hour1 Gas stream methane ethane propane butane + throat meter 31 40,977 3,861 2,408 1,404 48,656 32 32,360 2,675 1,409 701 37,209 33 8,617 1,186 939 703 11,447 38 13,133 2,513 1,941 22 17,610 39 6,194 1,648 1,272 674 9,788 41 0 0 22 1,352 1,375 42 26,166 1,027 197 27 27,421 43 14,811 2,834 2,189 25 19,860 48 1,678 321 248 3 2 % Pentane + 99.57% Production rate 88,390 (lbs / hour) [88,390 kg / hour] Page 41 This paper applies to China National Standard (CNS) A4 specification (21Ό × 297mm) 580554 A7 B7 V. Description of invention (LNG product power production rate purity * Low heating value 8 3 4, 1 8 3 (lb / hr) [834,183 kg / hr] 82.27% 1033.8 BTU / SCF [38.52 MJ / m3] frozen compression propane compression total compression

84,974HP

39,439HP

123,413 HP

[139,696 kW] [64,837 kW] [204,533 Kw] (Please read the precautions on the back before filling out this page) The Ministry of Economic Affairs, Intellectual Property Bureau, Employees' Cooperative, printed thermal energy to the methane section and then boil the boiler 5 2,913 BTU / Hr [ 34,182 kW] * (calculated based on unrounded airflow rate) Calculated based on the operating factors of an LNG manufacturing plant for 3 to 40 days per year, the specific energy consumption of the embodiment of Figure 5 of the present invention is 0.145 Hp-Hr / Lb [0.23 8 kW-Hr / Kg], which is about 16-26% better than the previous technology. Compared to Figures 1 and 3, the amount of energy required to produce a unit of liquid product in the embodiment of Figure 5 of the present invention is reduced by about 5% to 10%. Therefore, for a limited available compression horsepower, the embodiment in Figure 5 applies only the Chinese standard (CNS) A4 specification (210X297 mm) by recycling only the paper size on page 42. 580554 A7 B7 Intellectual Property Bureau, Ministry of Economic Affairs Printed by the staff consumer cooperative V. Description of the invention (4) C4 and heavy hydrocarbons are by-products of the concentrate, and can liquefy 5% more natural gas than the embodiment in Fig. 1 and liquefy more than the embodiment in Fig. 3 by 100 / 〇 natural gas. For a specific application, the embodiment shown in Figure 1, Figure 3, Figure 4, or Figure 5 is selected for liquefaction, which generally depends on the economic value of heavy hydrocarbons in the NGL by-product, or The corresponding value in the LNG product, or the heating specifications of the LNG product (the heating value of the LNG manufactured in the embodiment of Figures 1, 3, and 4 is greater than the heating of the LNG manufactured in the embodiment of Figure 5 Value comes low). Other embodiments will be understood by those skilled in the art, the present invention will be applicable to various types of LNG liquefaction plants, and according to the needs of the specially defined chemical plant to produce NGL gas stream by-products, LPG gas stream by-products, or a concentrate by-product product. Furthermore, it is understood that various process combinations can be used to recover the liquid by-product gas stream. For example, the embodiment of Figs. 1 and 3 can be used to recover an LPG gas stream by-product, or a concentrate by-product, instead of the NGL gas stream by-product as described in previous embodiments 1, 2. The embodiment of FIG. 4 can be used to recover an NGL gas stream by-product (the NGL gas stream by-product contains a significant proportion of the C2 component present in the feed gas); or recover a concentrate gas stream (the concentrate gas stream is only Contains the C4 component and the heavy hydrocarbon component in the feed gas); instead of one of the LP G gas by-products as described in Example 3 previously. The embodiment of FIG. 5 can be used to recover an NGL gas stream by-product (the NGL gas stream by-product contains a significant proportion of the C 2 component present in the feed gas); page 43 This paper applies Chinese national standards (CNS ) A4 size (210 × 297 mm) ........... • Refer to-(Please read the precautions on the back before filling this page)

Order A, etc. 580554 A7 B7 V. Description of the invention () (Please read the notes on the back before filling out this page) or recover an LPG gas stream by-product (the LPG gas stream contains a significant proportion of C3 in the feed gas) Ingredients); instead of one of the concentrate gas stream by-products as described in previous Example 4. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Figures 1, 3, 4 and 5 represent the preferred embodiment of the process shown in the present invention. Figures 6 to 21 represent other embodiments of a particular application of the invention. 'As shown in Figures 6 and 7, all or part of the concentrated liquid (gas stream 3 3) from the separator 11 can enter the fractionation column 19 from a separate, lower position than the central column feed point, instead of Part of the separator vapor (flow 3 4) to the heat exchanger 13 is combined. Fig. 8 shows another embodiment of the present invention, which requires less equipment than the embodiments of Figs. 1, and 6, although it requires a higher specific energy consumption. Similarly, Fig. 9 is another embodiment of the present invention, which requires less equipment than the embodiments of Figs. 3 and 7, and it also needs to consume more specific energy consumption. Figures 10 to 14 show another embodiment of the present invention, which requires less equipment than the embodiment of Figure 4, although it requires a higher specific energy consumption. (Note that as shown in Figures 10 to 14, distillation columns or systems such as the ethane remover 19 include the design of reboiler adsorption towers and the design of reflux and reboiler towers). Figures 15 and 16 are another embodiment of the present invention combining the separator / absorber column 18 and the ethane removal section 19 to a single fractionation tube column 19 of Figures 4. to 10. Depending on the heavy hydrocarbon content in the feed gas and the pressure of the feed gas, the cold feed gas stream 3 1 a leaving the heat exchanger 10 may not contain any liquid (because its temperature is higher than the dew point or because the pressure is higher than its (Condensing pressure), so the separator 11 in Figures 1, and 3-16 is not needed, and the cold feed gas stream can flow directly to a proper expansion device, for example, a work expansion mechanism 15. Page 44 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 A7 B7 V. Description of the invention () (Please read the precautions on the back before filling out this page) Employee Consumer Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs Printed before the air stream is supplied to the heat exchanger 60 for further condensation and cooling, liquid by-products are recovered from it (air stream 37 in Figs. 1, 3, 6 to 11, 13, 14), 4, 12, 15 and 16 The remaining gas deposition after the gas flow 47 in the figure and the gas flow 43 in the figure 5 can be achieved in many ways. In the processes of Figures 1, and 3 to 16, the airflow is heated [compressed to high voltage with energy derived from one or more work expansion mechanisms, partially cooled in a discharge cooler, and then combined with other original The air flow is further cooled by heat exchange. As shown in Figure 17, some applications prefer an auxiliary compressor driven by an external power source 59 to compress the airflow to a high pressure. As shown by the dotted lines in Figures 1, and 3 to 16 (heat exchanger 24 and discharge cooler 25), in some cases it may be preferred to reduce or remove the compressed air before entering the heat exchanger 60 The step of pre-cooling the compressed air flow to reduce the installation cost is achieved by increasing the load of the heat exchanger 60 and increasing the power consumption of the refrigeration compressors 64, 66, and 68. In such cases, the air stream 49a may leave the compressor and flow directly to the heat exchanger 24 as shown in Fig. 18, or directly to the heat exchanger 60 as shown in Fig. 19. If the work expansion mechanism is not used to expand the high-pressure feed gas in any one step, the compressor 16 may be replaced by a compressor driven by an external power source (for example, the compressor 59 shown in Fig. 20). In other cases, the compression of any airflow may not be compensated at all, so the airflow will flow directly to the heat as shown by the dotted line equipment (heat exchanger 24, compressor 16 and discharge cooler 25) in Figure 21 and Figures 1, 3-16. Switch 60. If the gas stream is not heated by the heat exchanger 24 before the factory fuel gas (gas stream 48) is pumped out, an auxiliary heater may be required to consume the gas. Page 45 This paper applies the Chinese National Standard (CNS) A4 specification ( 210X 297 mm) 580554 A7 B7 V. Description of the invention () Before being dropped, use energy airflow or other airflow to provide the necessary thermal energy (such as Figure 19-21) to warm the fuel gas. Generally, different treatment methods are selected after assessing factors such as liquid composition, plant size, desired by-product gas recovery, and available equipment. According to the present invention, the cooling of the incoming air stream and the incoming air stream sent to the LNG production section can be achieved in many ways. In the operations of Figs. 1, 3, 6-9, the inlet gas stream 31 is cooled by the external refrigerant gas stream and the liquid from the fractionation column 19. In the operations of Figures 4, 5, and 10-14, fast-expanding separator liquids and external cold coal flows are used to achieve this. In Figures 15 and 16, the liquid from the fractionation column, the rapidly expanding separator liquid, and the external cold coal stream are used to achieve this. In the operation of Figs. 17-2, only the external cold coal flow is used to cool the inlet gas flow 31. However, the cooling process airflow can also be used to assist the cooling effect of the high-pressure cold coal airflow (airflow 7 1 a), such as shown in Figures 4, 5, 10, and 11. It is also possible to use any airflow having a temperature lower than the temperature of the cooling air to be cooled. For example, vapors taken from the side of the separator / absorption column or from the fractionation column 19 can be used for cooling. For each application, the distribution of the column's liquid and / or vapor and its use as a process heat exchange, and which gas stream is selected for specific heat exchange ', must be carefully evaluated. The choice of cooling source depends on many factors' including but not limited to the composition and condition of the feed gas, the size of the plant, the size of the heat exchange, the temperature of the potential cooling source, and the like. Those skilled in the art will understand that any of the above cooling sources or combinations of cooling methods can be used to achieve the desired purpose. Page 46 --------------------- — This paper size applies to China National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back first (Fill in this page again.) Packing. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and printed by the Consumer Cooperatives of the People's Republic of China 580554 A7 ______ B7 V. Description of the invention The feed air flow in the production section can also be achieved in a variety of ways. In Figures 1 and 3-21, a single composition of cold coal is used to stagnate to achieve a high degree of external freezing effect. As for the low degree of external cold east effect, the multi-component cold coal stream is evaporated and used. A single cold heading stream is used to pre-cool the multiple cold heading stream. Alternatively, a single composition of cold coal stream and continuous lowering of the boiling point (also, "cascade refrigenertion"), or a single composition of cold coal that continuously reduces evaporation pressure can be used to achieve high freezing and low freezing effects. Another option is to achieve high freezing and low freezing effects by multi-component refrigerant flow and adjusting its individual components to provide the necessary cooling temperature. The choice of these external refrigeration methods depends on many factors, including, but not limited to, the composition and condition of the feed gas, the size of the plant, the size of the compressor driver, the size of the heat exchange, the temperature of the ambient heat tank, and so on. Those skilled in the art will understand that any of the above cooling sources or cooling methods may be used to achieve the desired purpose. The condensed liquid leaving from the heat exchange 60 (airflow 49 in Figs. 1, 6 and 8; airflow 49d in Figs. 3, 4, 7 and 9-16; airflow 49b in Figs. 5, 19 and 20; Fig. 17 The airflow 49e, airflow 49c in FIG. 18, and airflow 49a in FIG. 21) are subcooling, which can reduce or remove the amount of rapid expansion steam required to expand the airflow to the LNG storage tank 62. Generated when operating pressure. This generally eliminates the need to compress the rapidly expanding vapor, and reduces the specific energy consumption required to manufacture LN G. However, in some cases, it may be preferable to reduce the volume of the heat exchanger 60 and use a fast-expanding gas compressor or page 47. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm). (Please read the precautions on the back before filling this page) Order · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 580554 A 7 ------- —_— p f ----------- 5 2. Description of the invention () The method of depositing any generated rapidly expanding gas to reduce production costs. Although the expansion of individual gas streams is described in the expansion device, other expansion devices can also be used if appropriate. For example, 'Code method feeds a nearly condensed feed gas (flow 3 5 a in Figures 1, 3, 6 and 7) or a medium pressure return gas (flow 39 in Figures 1, 6, 8) Case of swelling. In addition, the supercooled liquid flow leaving the heat exchange 60 (airflow 49 in Figs. 1, 6, and 8; airflow 49d in Figs. 3, 4, 7, and 9-16); airflow 49b in Figs. 5, 19, and 20; The airflow 49e of Fig. 17 'The airflow 49c of Fig. 18 and the airflow 49a of Fig. 21) can be rapidly expanded in isentropy instead of work expansion, but will cause more cooling requirements for the heat exchanger 60' to avoid The rapid expansion vapor is formed during expansion, or the rapid expansion vapor compression is increased, or other devices need to deposit the obtained rapid expansion vapor. Similarly, for the ultra-cooled, high-pressure refrigerant flow leaving the heat exchange 60 (flow 1 1 0 in Figures 1 and 3-21), it is possible to rapidly expand by isoentropy instead of work expansion, and the result will increase due to the need to compress the refrigerant Although the above describes the specific embodiments considered to be preferred by the present invention, those skilled in the art should know that without departing from the spirit of the present invention as defined in the scope of the patent application below, Make many better or further improvements, that is, make the present invention applicable to various situations, the type of feed gas or other needs. Page 48 This paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) ) ............. «^! (Please read the notes on the back before filling this page) Order ·

Claims (1)

580554 B3 C8 D3 No. ⑺ // > ^ 3 No. of years and months amended Pinghe Patent Application Fanyuan1 · An improved method for liquefaction of natural gas containing methane and heavy hydrocarbons, including: The gas stream is cooled under a pressure that can condense at least a portion of it and form a condensed gas stream; and (b) ^ the condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; wherein the improvements are: (1) the natural gas The gas stream is processed by one or more cooling steps; (2) the cooled natural gas stream is expanded to a moderate pressure; (3) the expanded cooled natural gas stream is directed to a distillation tube: a column, where the gas stream is It is divided into a volatile residual gas stream, which contains the main part of the methane and a lighter K component; and a relatively less volatile component ......... (Please (Please read the notes on the back Φ before filling this page) The main part of the silk department. The group substance chlorocarbon U & ul The package contains its 5 · 9 points and a residual nature should be used. -4 / fv air pressure on the system Condensation is divided into two parts and the components are condensed. This page 49 0 This paper is suitable for China National Standard (CNS) A4 size (210X297 mm) 580554 8333 | ABCD j Patent scope and fluid Once the gas is condensed and cooled, the 6./V steam should be used as a parallel tube distillation to steam the incoming material into the end-of-line top-flowing body column liquid pipe. The Gu's chemical liquid is naturally composed of nitrogen, carbon, and: The tiger ’s armor contains the following: the internal method will change the formula to a good one; 2 will be able to force the flow of gas and gas under pressure, but the cold weather will form and condense the segment 1; · The shape is so low that it swells and swells. · The condensate cold air should be a good change, and its qi is natural, and the place where the qi is rational is cold. Ijlt species; The branch department is airy and natural. The steam condensate and the air condensate are steamed. The ingredients are as small as possible (please read the precautions on the back Φ before filling this page). The swelled gas is steamed by the pressure and the pressure is expanded to the bulk fluid fluid I. The liquid is swollen and the swelling is caused by the flow. Less flow to body page 50 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 AS B3 C8 D3 6. Scope of patent application (please read the notes on the back Φ before filling this page) Divided into one Volatile residual gas stream, which contains the main part of the methane and a lighter composition; and a relatively speaking • less volatile component, which contains the main part of the heavy hydrocarbon composition; (6) the The volatile residual gas stream portion is cooled under pressure to condense at least a portion of it; (7) the condensation portion is divided into at least two portions to form the condensate gas and a second liquid stream; and (8) the The second liquid stream was directed to the steaming hall column and fed as the top of the distillation column. 3. — An improved method for liquefying natural gas consisting of toluene and heavy hydrocarbons, wherein: (a) the natural gas stream is cooled at a pressure that can condense at least a portion of it and form a condensed stream; and S Qilang Shenhui Gou W3TI1 Xiao Fei-Jia Yezhong (b) The condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) The natural gas stream is subjected to one or more cooling steps Processing; page 51 This paper size applies Chinese National Standard (CNS) A4 specifications (210X297 mm) 580554 A8 B3 C8 D3 Patent application scope (2) The cooled natural gas stream is divided into at least a first vapor stream and a first Two vapor streams; (3) the first vapor stream is cooled to almost all condensation, and then expanded to a medium pressure plant; (4) the second vapor stream is expanded to the intermediate pressure; (5) the The almost fully condensed gaseous first vapor stream and the expanded gaseous second vapor stream are led to a steamed copper pipe column, wherein the gas stream is divided into a volatile residual gas stream, which Contains the main part of the methane and a lighter composition; and a relatively less volatile component, which is the main part containing the heavy hydrocarbon composition; and (6) the volatile residual gas stream part is Cool under pressure to condense at least a portion of it to form the condensation. 4. An improved method for liquefying natural gas containing methane and heavy hydrocarbons, wherein: (a) the natural gas stream is cooled under a pressure capable of condensing at least a portion of it and forming a condensed gas stream; page 52 of this The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ............... ¥: (Please read the precautions before reading «before filling this page) ij; τ-Line-580554 "a | C8 ___ D3 _ VI. Patent Application Scope (c) The condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; (Please read the precautions of ® before filling out this page ) The improvements are: (1) the natural gas stream is processed by one or more cooling steps to be partially condensed; (2) the partially condensed natural gas stream is divided into at least one steam stream and a liquid (3) the vapor stream is divided into at least a first vapor stream and a second vapor stream; (4) the first vapor stream is cooled to almost all condensation, and then expanded to a moderate pressure (5) the second vapor flow system is expanded The medium pressure force; (6) the liquid stream is expanded to the intermediate pressure; (7) the expanded, almost fully condensed gaseous first vapor stream, the expanded, gaseous second vapor stream, and P [The expanded liquid stream system is led to a distillation column, where s ^. The gas stream system is divided into a volatile residual gas stream 'j which contains the main part of the methane and a lighter composition; and a Relatively less volatile components, which are the major components of the heavy hydrocarbon composition t 1 | page 53 This paper is sized for China National Standard (CNS) A4 (210X297 mm) 580554 A3 B8 C8 D3 part of the scope of patent application; and (please read the notes on the back Φ before filling this page) (8) The volatile residual airflow part is cooled under pressure to condense at least part of it to form the condensed airflow. 5. — An improved method for liquefaction of natural gas containing pinane and heavy hydrocarbons, wherein: (a) the natural gas stream is cooled under the waste force that can condense at least a portion of it and form a condensed gas stream, ( d) the The condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream. The improvements are: (1) the natural gas stream is treated by one or more cooling steps to partially condense it; (2) the partially condensed gas stream The natural gas flow is divided into at least one vapor flow and a liquid flow; (3) The vapor flow is divided into at least one first vapor flow and a second vapor flow; (4) The first vapor flow and at least a portion of the The liquid streams merge to form a combined air stream; L · 7 page 54 This paper is sized to the Chinese National Standard (CNS) A4 (210X297 mm) 580554 (Please read the precautions of Back® before filling this page) This paper is suitable for Chinese National Standard (CNS) A4 Regulation (210 X 297 mm) 580554 — C8 ___D8_ VI. The pressure of condensing air flow when applying for a patent (Please read the notes on the back before filling this page) _ (b) The condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) the natural gas stream is One or more cooling steps; (2) the cooled natural gas stream is divided into at least a first steam stream and a second steam stream; (3) the first steam stream is cooled to almost all condensation, and then Is expanded to an intermediate pressure; '(4) the second vapor stream is expanded to the intermediate pressure; (5) the expanded, nearly all gaseous first vapor stream, and the expanded, gaseous first A two-vapor gas stream is directed to the distillation column, where the gas stream is divided into a volatile residual gas stream that contains the main part of the methane and a lighter island composition; and a relatively less volatile gas stream. Ting, which contains the main part f of the heavy hydrocarbon composition; I {(6). The volatile residual gas stream part is cooled under pressure to condense at least a part of h \ it; (7) The condensing part is divided into at least two parts to form the p sound L ί page 56 The paper size is in accordance with Chinese National Standards (CNS) A4 specifications (210X297 mm) 580554 A3 B3 C8 D8 A liquid stream; and (please read the precautions on the back before filling this page) (8) The liquid stream is directed to the distillation column as the top feed. An improved method for liquefying natural gas containing methane and heavy hydrocarbons, wherein: (a) the natural gas stream is cooled under a pressure capable of condensing at least a portion thereof and forming a condensed gas stream; and (e) the condensation The gas stream is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) the natural gas stream is processed by one or more cooling steps so that it is partially condensed; (2) the partially condensed natural gas The air flow system is divided into at least one vapor flow and a first liquid flow; (3) The vapor flow system is divided into at least one first vapor flow and a second vapor flow; (4) the first vapor flow system is cooled to several Nearly all condensed, and then expanded to a moderate pressure; p. 57 The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 580554 B8 C8 D3 VI. Patent application park (5) The second vapor stream is expanded to the intermediate pressure; 第一 the first liquid stream is expanded to the intermediate pressure; (7) the expanded, almost fully condensed gaseous first vapor Gas stream, the expanded gaseous second vapor stream, and the expanded first liquid stream system are led to a distillation column, wherein the gas stream system is divided into a volatile residual gas stream, which contains the main part of the pinane and A lighter composition; and a relatively less volatile component, which is the main part of the jujube containing the heavy hydrocarbon group; (8) the volatile residual gas stream part is cooled under pressure to make it At least a part of condensation; (9) the condensing part is divided into at least two parts to form the condensing gas stream and a first and second liquid stream; and (1) the second liquid stream system is led to the distillation column column as Its top is fed. • 8. An improved method for liquefaction of natural gas containing methane and heavy hydrocarbons, in which: (a) the natural gas stream is capable of condensing and forming at least a part of it Group Standard (CNS) A4 (210 X 297 mm) i Please read the back-to-side precautions before filling out this page 580554 B3ca D3 The scope of the patent application is to cool under the pressure of a condensing airflow; (b) the condensing airflow system It is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) the natural gas stream is processed by one or more cooling steps to partially condense it; (2) the partially cold natural gas stream system It is divided into a vapor stream and a first liquid stream. (3) The vapor stream is divided into at least a first vapor stream and a second vapor stream. (4) The first vapor stream is associated with at least a part of the The first liquid stream merges to form a combined airflow; (5) the combined airflow is cooled to almost all condensation 'and then expanded to a moderate pressure; (6) The second vapor stream is expanded to the intermediate pressure; (7) Any remainder of the first liquid stream is expanded to the intermediate pressure; t (please read the precautions on the back of the page before filling in this page) line ( 8) The expanded, almost fully condensed combined gas stream, the expanded gaseous second vapor stream, and any remaining part of the first liquid stream are directed to the distillation column, where the gas stream is applicable on page 59 of this paper China National Standard (CNS) A4 specification (210X297 mm) 580554 B8 C8 D3 6. Scope of patent application (please read the precautions of Back® before filling this page) It is divided into a volatile residual gas stream, which contains the first The main part of the combustion and the lighter composition; and a relatively non-volatile component, which is the main part containing the heavy hydrocarbon composition; (9) the volatile residual gas stream part is cooled under pressure To condense at least a part of it; (1 0) the condensing part is divided into at least two parts to form the condensed gas stream and a second liquid stream; and (1 1) the second liquid stream system is led to the steam tooth The string is used as its top feed. 9. An improved method for liquefying natural gas containing formazan and heavy hydrogen broken materials, wherein: (a) the natural gas stream is capable of condensing and forming at least a portion of it Cooling under the pressure of a condensed gas stream; (b) the condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) the natural gas stream is processed through one or more cooling steps; (2) The cooled natural gas flow is expanded to a medium pressure page 60. The paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) 580554 AS B3 C8 D3. (Please note that this page is to be completed on this page) (3) The expanded and cooled natural gas stream is divided into a vapor stream and a liquid stream; (4) The liquid stream is expanded to a lower intermediate pressure; (5) the The expanded liquid stream is led to the steam column, where the stream is divided into a more volatile steam stream; and a phase. For the less volatile part, it contains the heavy Hydrocarbon (6) the more volatile distilled vapor stream is combined with the volatile gas stream to form a volatile residual gas stream portion that contains the methane and a lighter composition; and (7) The volatile residual gas stream is cooled under pressure to condense at least a portion of it to form the condensed gas stream. 1 0 · An improved method for liquefying natural gas containing 'methane and heavy hydrocarbon materials, wherein: (a) the natural gas stream is cooled under a pressure capable of condensing at least a portion of it and forming a condensed gas stream; ( b) The condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; among them, Ruliang is: k p. 61 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 B8 C8 D3 Application Patents (1) The natural gas stream is processed by one or more cooling steps to partially condense it; (2) the partially condensed natural gas stream is divided into a first vapor stream and a first liquid stream; < 3) the first vapor stream is expanded to a medium pressure; (4) the expanded first vapor stream is divided into a second vapor stream and a second liquid stream; (5) the second liquid stream The system is expanded to a lower intermediate pressure; (6) the first liquid stream is expanded to the intermediate pressure; (7) the expanded second liquid stream and the expanded first liquid stream are directed to Distillation column, wherein the gas stream is divided into a more volatile distillation vapor stream; and a relatively less volatile part, which contains the main part of the heavy hydrocarbon composition; (8) the The more volatile distilled vapor stream merges with the second vapor stream to form a volatile residual gas stream that contains the methane and a lighter composition; and Η ¥ £ · (Please read the precautions for Back® first Refill this page} (9) The volatile residual airflow part is cooled under pressure to condense at least a part of it to form the condensed airflow. Page 62 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297) (Mm) 580554 AS B8 C 8 D3 Patent Application Scope (please read the precautions in the back- «before filling out this page} 1 1. An improved method for liquefaction of natural gas containing methane and heavy hydrocarbons, where: (a) the natural gas stream is Cooling under a pressure that can condense at least a portion of it into green and form a condensed gas stream; (b) the condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) the natural gas stream is Treatment of one or more 4 cooling steps; * (2) The cooled natural gas stream is expanded to a medium pressure: and is then directed to a contacting device to form a volatile residual gas portion which contains the Methane and lighter composition; and a first liquid stream, (3) the first liquid stream is directed to a distillation column, wherein the gas stream is divided into a more volatile distillation vapor stream; and a relative The less volatile part 'is the main part containing the heavy hydrocarbon composition; (4.) The more volatile distillation vapor stream is cooled enough to cause a part of it to condense, so that Into a second liquid stream; 6th paper size suitable for Chinese National Standards (CNS) A4 specifications (210X297 mm) 580554 A8 B3 C8 D8 patent application scope (please read the precautions of the back of the world before filling in this page) (5) at least a portion of the expanded cooled natural gas stream is in close contact with at least a portion of the second liquid stream in the contacting device; and (6) the volatile residual gas stream is a portion that can condense a small portion of it and condense Cooling under pressure to form the condensed gas stream. 1 2. An improved method for liquefying natural gas containing methane and heavy hydrocarbons, wherein: (a) the natural gas stream is capable of condensing at least a portion of it and forming a Cooling under the pressure of the condensed gas stream; (b) the condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) the natural gas stream is processed through one or more cooling steps to treat it Partial condensation; (2) The partially cooled natural gas stream is divided into a vapor stream and a first liquid stream; (3) The vapor stream is expanded to a moderate pressure , And then led to a contact device to form a volatile residual gas portion, which contains the methane and page 64. This paper is sized to Chinese National Standard (CNS) A4 (210X297 mm) ABCD 580554. The scope of the patent application is relatively light; and a second liquid stream, (4) the first liquid stream is inflated to a medium pressure on the side '(5) the second liquid stream and the expanded first liquid stream are guided To a distillation column, where the gas stream is divided into a more volatile steam stream and a relatively less volatile part, which is the main component of the heavy hydrocarbon composition (6) The relatively volatile distilled vapor stream is cooled enough to cause a part of it to condense and condense to form a third liquid stream; (7) at least a part of the expanded vapor stream is in the contact device and At least a portion of the third liquid stream is in close contact; and (8) the volatile residual gas stream portion is cooled under a pressure that can condense at least a portion of it and form the condensed gas stream. 1 3. An improved method for liquefying natural gas containing methane and heavy hydrocarbons, wherein: (a) the natural gas stream is cooled under a pressure capable of condensing at least a portion of it and forming a condensed gas stream; 65 pages This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) ...............-------- Order ... .... line (please read the notes on the back Φ before filling out this page) 580554 BS C3 D3 VI. Patent Application Fanyuan (b) The condensing gas stream is expanded to a low pressure to form the liquefied natural gas stream; (Please Read the notes on Back® before filling out this page} The improvements are: (1) the natural gas stream is processed through one or more cooling steps; (2) the cooled natural gas stream is expanded to a moderate pressure, It is then led to a contact device to form a first vapor stream and a first liquid stream; (3) The first liquid stream is directed to a distillation column, and the gas stream is divided into a more volatile A stream of distilled vapor; and a relatively less volatile portion which contains the The main part of the composition of hydrocarbons; (4) The more volatile distilled vapor stream is cooled enough to cause a part of it to condense to form a second vapor stream and a second liquid stream ·; ·. (5 ) At least a part of the second liquid stream is led to the distillation column as its top feed; (6) at least a part of the expanded, cooled natural gas stream. In the contact device and at least a part of the second liquid stream (7) The first vapor stream is merged with the second vapor stream. Page 66 The paper size is in accordance with China National Standard (CNS) A4 (210X297 mm) 580554 BS C8 D3. Apply for a patent to form a volatile residual gas stream part, which contains the main part of the methane and lighter composition; and please read the precautions before filling in this page (8) The volatile residual gas stream part is At least a part of it is condensed and cooled under the pressure of forming the condensed gas stream. 1 4. An improved method for liquefying natural gas containing methane and heavy hydrocarbons, Among them: (a) the natural gas stream is cooled under a pressure that can condense at least a part of it and form a condensed gas stream; (b) the condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; It is improved as follows: (1) the natural gas stream is partially or condensed by one or more cooling steps; (2) the partially condensed natural gas stream is divided into a first vapor stream and a first liquid stream; ( 3) the first vapor stream is expanded to a medium pressure, and is then led to a contact device to form a second vapor stream and a second liquid stream; (4) the first liquid stream is expanded to the Medium pressure; page 67 This paper is suitable for Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 AS B3 C8 D3 VI. Patent application scope (5) The second liquid flow and the expanded first liquid flow It is led to a distillation column, where the gas stream is divided into a more volatile steam vapor stream; and a relatively less volatile part, which contains the main composition of the heavy hydrocarbon material. Part; (6) The more volatile distilled vapor stream is cooled enough to cause a part of it to condense to form a third vapor stream and a third liquid stream; (7) a portion of the third liquid stream. Is fed by the distillation column as its top end; (8) at least a portion of the expanded first vapor stream is in close contact with at least a portion of the third liquid stream in the contact device; (9) ) The second vapor stream is combined with the third vapor stream to form a volatile residual gas stream portion, which includes the main part of the methane and a lighter composition; and (10) the volatile residual gas stream portion is At least a portion of it can be condensed and cooled under pressure to form the condensed gas stream. (Please read the precautions of Back® before filling out this page) • Packing ·-, TI · Line L · 1 5. —A kind of liquefaction of natural gas containing methane and heavy hydrocarbons, page 68 Paper size Applicable to China National Standard (CNS) A4 specification (210 X 297 mm) 580554 B3 C8 D3 6. Method for applying for improvement of patent scope, in which: (a) the natural gas flow is capable of condensing and forming at least a part of it (please first Read the back-** notes before filling in this page) * • Cool under the pressure of a condensing gas stream; (b) The condensing gas stream is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) The natural gas stream is processed through one or more cooling steps; (2) The cooled natural gas stream is swelled to a medium pressure, and is then led to a contact device to form a type containing the formazan and The volatile residual gas portion of the main part of the lighter composition; and a first liquid stream; (3) the first liquid stream is heated and then directed to a distillation tube. The column, wherein the gas stream is divided into a relatively Volatile • Distilled vapor ; And a relatively less volatile part, which is the main part containing the heavy hydrogen composition; (4) the more volatile distillation vapor stream is cooled enough to cause a part of it to condense (5) At least a part of the expanded and cooled natural gas flow is on page 69. This paper is suitable for Chinese National Standard (CNS) A4 (210X297 mm) 580554 B3 C8 D3 Application The scope of the patent is in close contact with at least a portion of the second liquid stream in the contacting device; and (6) the volatile residual gas stream portion is cooled under a pressure that can condense at least a portion thereof and form the condensed gas stream. 16 · An improved method for liquefying a natural gas consisting of heavy hydrocarbons containing tortoise winter, wherein: (a) the natural gas stream is cooled under a pressure capable of condensing at least a portion of it and forming a condensed stream; ( b) the condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) the natural gas stream is processed by one or more cooling steps to partially condense it; (2) the partially condensed gas stream The natural gas flow is divided into a vapor flow and a first liquid flow; ih I only ¥ h (Please read the back- «Notes before filling out this page} (3) The vapor flow is expanded to one Medium pressure, and then led to a contact device to form a volatile residual gas part containing a main part of the formazan and lighter composition and a second liquid stream; page 70 This paper applies Chinese national standards ( CNS) A4 specification (210X297 mm) 580554 B8 C8 D3 Patent application park (4) The second liquid stream is heated; (5) The first liquid stream is expanded to the medium pressure; (6) the Heated The two liquid streams and the expanded first liquid stream are directed to a distillation column, where the gas stream is divided into a more volatile distillation vapor stream; and a relatively less volatile portion, which is Contains a major portion of the heavy hydrocarbon composition; (7) the more volatile distilled vapor stream is cooled enough to cause a portion of it to condense to form a third liquid stream; ^ (8) at least a portion of the The expanded vapor stream is in close contact with at least a portion of the third liquid stream in the contact device, and (9) the volatile residual gas stream is cooled under a pressure that can condense at least a portion of it and form the condensed gas stream. (Please read the back of «Precautions before filling out this page} -Order · Line ¥ L · 1 7 · —An improved method for liquefaction of natural gas containing methane and heavy hydrocarbons, where: (a) the The natural gas airflow is cooled under the pressure that can condense at least a part of it and form a condensed airflow; page 71 This paper applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 B3 C8 D3 6. Scope of patent application (b) The condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; (please read the precautions of Back® before writing this page) The improvements are: (1) the natural gas stream It is processed by one or more cooling steps; (2) The cooled natural gas stream is expanded to a medium pressure, and then guided to a contact device to form a first vapor stream and a first liquid stream; (3) The first liquid stream is heated and then led to a distillation column, where the stream is divided into a more volatile distillation vapor stream; and a relatively less volatile portion, which contains The main part of the heavy hydrocarbon composition; (4) The more volatile distilled vapor stream is cooled enough to cause a part of it to condense to form a second vapor stream and a second liquid stream; * ( 5) at least a part of the second liquid stream is led into the distillation column and is fed as the top of the distillation liquid column;. (6) at least a part of the expanded and cooled natural gas stream is in the contact device At least a portion of the remaining portion of the second fluid flow intimate contact; page 72 of this paper circumferential dimension suitable for China National Standard (CNS) A4 size (210 > < 297 mm) 580554 AS B3 C8 D3 VI. Patent Application Fanyuan (7) The first vapor stream is merged with the second vapor stream to form a volatile residual gas stream portion. Note for φ, please fill in this page again) * Including the main part of the methane and lighter composition; and (8) The volatile residual gas stream part is cooled under the pressure that can condense at least a part of it and form the condensed gas stream. 1 8.  -An improved method for liquefaction of natural gas containing methane and heavy hydrocarbons, wherein: (a) The natural gas stream is cooled under a pressure that can condense at least a portion of it and form a condensed gas stream; (b) The condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; where. The improvements are: • (1) The natural gas flow is passed through one. Or two or more cooling steps to partially condense it; (2) the partially condensed natural gas stream is divided into a first vapor stream and a first liquid stream; • (3) the first vapor stream is expanded to a medium The pressure is then directed to a contact device to form a second vapor stream and a second liquid stream; Page 73 This paper is suitable for Chinese National Standard (CNS) A4 (210X297 mm) 580554 BS C8 D3 6. Scope of patent application (4) The second liquid stream is heated;; (5) The first liquid The flow system is expanded to the intermediate pressure; (6) the heated second liquid flow and the expanded first liquid flow system are guided to a distillation column, wherein the air flow system.  Is divided into a more volatile distillation vapor stream; and a relatively less volatile part, which is the main part containing the heavy hydrocarbon material composition; (7) the more volatile distillation vapor stream system Is cooled enough to cause a portion of it to condense, 'to form a third vapor stream and a third liquid stream;' (8) a portion of the third liquid stream is fed by the distillation column as its top end; ( 9) At least a portion of the expanded first vapor stream is in close contact with at least a portion of the remaining portion of the third liquid stream in the contact device; .  (10) the second vapor stream and the third vapor. The gas streams are merged to form a volatile residual gas stream portion, which is a major portion containing the methane and lighter components; and  (11) The volatile residual gas stream is partly cooled under a pressure that can condense at least a part of it and form the condensed gas stream. Page 74 This paper is suitable for China National Standard (CNS) A4 (210X297 mm) (Please read the back of «Notes before filling out this page) —Packing · -Order-Thread 580 580 B3 C8 D3 VI. Scope of patent application 19.  An improved method for liquefying natural gas containing methane and heavy hydrocarbons, wherein: (a) the natural gas stream is cooled under a pressure that can condense at least a portion of it and form a condensed stream; (b) the condensed stream It is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) the natural gas stream is processed through one or more cooling steps; (2) the cooled natural gas stream is expanded to a moderate pressure, and thereafter It is led to the center of a distillation column's column feed point, where the gas stream is divided into a more volatile. A steam stream of steamed food; and a relatively less volatile part, which is the main part containing the heavy hydrocarbon material; shoots (3) a distilled steam from the underside of the expanded, cooled natural gas stream Extracted from the column area of the distillation tube and cooled enough to condense a part of it to form a steam stream and a liquid stream; (4) At least a part of the expanded and cooled natural gas stream is L · (Please read first Please note this page and fill in this page again.) Page 75 This paper size applies Chinese National Standard (CNS) A4 (210X297 mm) 580554 B3 C8 D3 6. The scope of patent application is in the distillation column and at least a part of the The liquid stream is in close contact; * (5) the vapor stream is merged with the more volatile vapor stream to form a volatile residual gas stream portion that contains the methane and a lighter major component; and (6) The volatile residual gas stream is cooled at a pressure that can condense at least a portion of it and form the condensed gas stream. 2 0.  -An improved method for liquefying natural gas containing methane and heavy hydrocarbons, wherein: (a) the natural gas stream is cooled under a pressure capable of condensing at least a portion of it and forming a condensed gas stream; (b) the condensation The gas stream is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: * (1) the natural gas stream is treated by one or more cooling steps to partially condense it;  '(2) The partially condensed natural gas stream is divided into a first vapor stream and a first liquid stream; (3) The first vapor stream and the first liquid stream are inflated. Chinese National Standard (CNS) A4 Regulations (210 X 297 mm) (Please read the Precautions of Back® before filling out this page) Order · Line · 580554 B3 C8 D3 The scope of patent application has expanded to a moderate pressure; (4) The expanded first vapor stream and the expanded first liquid stream are directed to a central column feed point of a distillation column, wherein the gas stream is divided into a relatively volatile distilled vapor stream; and a relative For the less volatile part, it is the main part containing the heavy hydrocarbon composition; (5)-the steam of the steaming hall is extracted from the column area of the distillation tube below the expanded first vapor stream, And cool enough to condense one of them to form a second vapor stream and a second liquid stream; (6) at least a part of the expanded first steam and gas stream is connected in the distillation column with the At least part of the second liquid stream Tightly contacting; (7) the second vapor stream to the steam line and the more volatile.  The gas streams are combined to form a volatile residual gas stream portion that includes the methane and a lighter component; and (8) the volatile residual gas stream portion is at a pressure that can condense at least a portion of it and form the condensed gas stream. Under cooling. (Please read the precautions on the back before filling in this page) • Assembling • • Binding-thread ί Page 77 The paper size applies to China National Standard (CNS) A4 (210X297 mm) 580554 Β3 C8 D3 VI. Patent Application Range 2 1.  -An improved method for liquefying natural gas containing methane and heavy hydrocarbons, wherein: (a) the natural gas stream is cooled under a pressure capable of condensing at least a portion of it and forming a condensed gas stream; (b) the condensation The gas stream is expanded to a low pressure to form the liquefied natural gas stream; the improvements are: (1) the natural gas stream is processed through one or # cooling steps; (2) the cooled natural gas stream is expanded to a moderate pressure , Then led to the center of a distillation column's column feed point, where the gas stream is divided into a more volatile • steaming steam stream; and a relatively less volatile • It contains the main part of the heavy hydrocarbon composition; '(3) a distillation vapor is extracted from the column area of the distillation tube under the expanded first vapor stream, and cooled enough to condense a part of it, To form a vapour stream " stream and a liquid stream; (4) a part of the liquid stream is supplied to the distillation column for p. 78 The national paper standard (CNS) A4 specification (210X297mm) (please read the precautions before filling in this page first) 丨 install tr-line 580554 A3 B3 C8 D8 Six, apply for patent scope distillation; set the same phase and steam ¾ 3 * · The material is pumped in several positions, the column material tube is filled with the first-class gas, and the gas is liquid, but the part of the talent is cold; Bulging in the middle of the column. The tight fraction of the column is close to the fraction. The steaming part is less than the remaining system stream. The gas and gas-containing steam stream is the gas. Into the gas,; The steaming branch of the steaming branch and the branch of the steaming department has the remaining energy (please read the precautions on the back before writing this page). However, the Ministry of Gas Condensation and Refrigeration should be reduced to a minimum, and the pressure can be reduced. The tile is transformed and the condensate is condensed. Gas-fired: Qijia contains its days, and the method of formula a "good day's liquid should be formed; condensed by a stream of condensed air, which is lowered to a lower pressure to expand and expand; It should be a good change, its S step is cold but there are many dial species, or 1 warp is flowing, and the weather is natural. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 A3 B8 C8 D8 Apply for a patent to condense part of it; (Please read the notes on the back before filling out this page) (2) The partially condensed natural gas stream is divided into a first vapor stream and a first liquid stream; (3) the The first vapor stream and the first liquid stream are expanded to a medium pressure; (4) The expanded first vapor stream and the expanded first liquid stream are directed to a central column feed of a distillation column. Where the gas stream is divided into a more volatile distilled vapor stream; and a relatively less volatile part, which is the main part containing the heavy hydrocarbon material composition; (5) a distilled vapor stream system Extract from the column area of the distillation tube below the expanded first vapor stream and cool enough to condense a part of it to form a first.  Two vapor streams and a second liquid stream; (6) A part of the second liquid stream is supplied to the distillation tube '· column as another feed, and the position of the feed point and the distillation vapor gas stream are removed from the column The positions of extraction are almost the same; * (7) at least a part of the expanded first vapor stream is at least a part of the distillation column and the second liquid stream-the paper size is in accordance with Chinese national standards ( CNS) A4 specification (210X297 mm) 580554 A8 B3 C8 D8 6. Apply for patents in close contact; (please read the precautions on the back before filling this page) (8) The second vapor stream is the same as the Volatile vapour streams are combined to form a volatile residual gas stream portion that includes the main part of the methyl alcohol and lighter composition; and (9) the volatile residual gas stream portion is such that at least a portion of it can be condensed and formed Cooling under the pressure of this condensing gas stream '2 3.  -An improved method for liquefying natural gas containing methane and heavy hydrocarbons, wherein: (a) the natural gas stream is cooled under a pressure capable of condensing at least a portion of it and forming a condensed stream; and (b) the The condensing gas stream is expanded to a low pressure to form the liquefied natural gas stream; the following improvements are: (1) the natural gas stream is processed through one or more cooling steps;  (2) The cooled natural gas stream is expanded to a moderate pressure and then led to the central string feed point of a distillation column, where the gas stream is divided into a paper standard that is more applicable to Chinese national standards (CNS) A4 specification (210 X 297 mm) 580554 A8 B8 C8 D8 6. Scope of patent application ... (Please read the precautions on the back before filling this page) Volatile distilled vapor stream; and a relatively Non-volatile part, which is the main part containing the heavy carbon and hydrogen material; (3) A distilled vapor is extracted from the column area of the distillation tube under the expanded and cooled natural gas stream, and cooled sufficiently A part of it is condensed to form a vapor stream and a liquid stream; (4) at least a part of the expanded, cooled natural gas stream is at least a portion of the distillation column and the liquid stream. (5) A liquid stream is drawn from the distillation column above the location where the gas stream is drawn off. It is separated out, wherein the distilled liquid stream is heated and then supplied to the distillation column as another kind of feed, and the position of the feed point is located below the position where the distilled vapor stream is evacuated from the column; S Qi Xunxuan Shen NGTDSri: Xiao Kaiquan Zhu Huti (6) The vapor stream is merged with the more volatile distilled vapor stream to form a volatile residual gas stream portion, which contains the And (7) the volatile residual gas stream is at a pressure that can condense at least a part of it and form the condensed gas stream. Page S2 This paper applies Chinese National Standard (CNS) A4 specifications. (210X297 mm) 580554 'A | Β8 C8 __ D8_ VI. Patent application scope cooling. twenty four.  -An improved method for liquefying natural gas containing methane and heavy hydrocarbons, wherein: (a) the natural gas stream is cooled under a pressure capable of condensing at least a portion of it and forming a condensed gas stream; (b) the condensation The gas stream is expanded to a low pressure to form the liquefied natural gas stream; (Please read the precautions on the back before filling this page} For the change, the S section of the reform is suddenly cold. • Two or more jg: Warp; The condensing flow of cold air and air separation department will naturally use air to air.  Of course, the first part of the condensate and the cold air component of the condensate are steamed, and the first part of the body is `` pitted ''. The components are swelled and the body fluid is swelled.  The first and the second, the pneumatic pressure steaming, etc., the first to the liquid material enters the first column of the tube expansion, the lack of and column flow tube gas, one to the first, the expanded system to expand the body.的 发 #volatiles are not more than a pair of separated phases are vaporized by a system and a stream of gas, and the boiling point is vaporized into a group of substances hydrogen carbon il & uf the inclusion system and its branch Essentials of the home page 8 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 A8 B8 C8 D8 VI. Patent application scope (5) A distillation vapor stream is from below the expanded first vapor stream Is extracted from the column area of the distillation tube, and is cooled enough to condense a part of it to form a second vapor stream and a second liquid stream; (6) at least a part of the expanded first vapor stream is tied to the The distillation tube column is in close contact with at least a part of the second liquid stream; (7) A distilled liquid stream is extracted from the steam column column region above the extraction steam distillation position, and after heating And is directed to the distillation column column area below the position where the distillation vapor stream is evacuated as another feed of the distillation column; (8) the second vapor stream system. Combined with the more volatile vapor stream to form a volatile residual gas stream portion that contains the main portion of the oxane and lighter composition; and  (9) The volatile residual gas stream is cooled at a pressure that can condense at least a portion of it and form the condensed gas stream. 2 5.  -A kind of liquefaction of natural gas containing methane and heavy hydrocarbons.  Hongpage.   This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) (please read the precautions on the back before filling this page); installation · line · 580554 A8 B3 C8 D3 : (Please read the notes on the back before filling out this page) (a) The natural gas stream is capable of condensing and forming at least part of it •. Cooling under the pressure of a condensed gas stream; and (b) the condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream; wherein the improvements are: (1) the natural gas stream is processed through one or more cooling steps; (2) ) The cooled natural gas stream is expanded to a moderate pressure and then led to the central string feed point of a distillation column, where the gas stream. Is divided into a more volatile distillation vapor stream; and a relatively less volatile part, which is. Contains the major part of the heavy hydrocarbon composition;.  (3) A distillation vapor is extracted from the column area of the distillation tube below the expanded, cooled natural gas flow, and cooled enough to condense a portion of it to form a vapor flow and a liquid flow; (4) at least A portion of the liquid stream is supplied to the distillation column.  ; As another kind of feed, this feed point is almost the same as the position where the distilled steam stream is evacuated from the steam column; page 85 This paper size applies Chinese National Standard (CNS) A4 (210 X 297) (Mm) 580554 A8 B8 C8 D8 6. Scope of patent application (5) At least a part of the expanded and cooled natural gas flow is at least part of the distillation column and the liquid flow (please read the precautions on the back before filling in this Page} • in close contact; (6) a distilled liquid stream is evacuated from the distillation tube column above the position where the distilled vapor stream is evacuated, wherein the steamed liquid stream system is heated and thereafter It is supplied to the distillation column as another kind of feed, and the position of the feed point is below the position where the distillation vapor stream is evacuated from the column; (7) The vapor stream is related to the more volatile Distilled vapor streams are combined to form a volatile residual gas stream portion that includes the methane and a lighter component of the main portion; and (8) the volatile residual gas stream portion is such that at least one * portion of it Cooling the junction and the condensed stream is formed a pressure. 26.  -An improved method for liquefying natural gas containing methane and heavy hydrocarbon substances and composition, wherein: (a) the natural gas stream is cooled under a pressure capable of condensing at least a portion thereof and forming a condensed gas stream; and (b) The condensing airflow is expanded to a low pressure to form the liquefied sky. The paper size is in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 male 580554 A8 B8 C8 D8.) 6. The scope of patent application and airflow; (Please read first Note on the back page, please fill in this page again) The improvements are: (1) The natural gas stream is processed by one or more cooling steps to partially condense it; (2) The partially condensed natural gas stream is divided into a first vapor Air flow and a first liquid flow; (3) the first vapor flow and the first liquid flow are expanded to a medium pressure; (4) the expanded first vapor flow and the expanded first liquid flow are Lead to a central column feed point of a distillation column, where the gas stream is divided into a more volatile distillation vapor stream; and a relatively less volatile portion, which is Contains the main and main components of the heavy hydrocarbon material; (5) A distillate vapor stream is printed from the expanded consumer's cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs of the first vapor ~ Extraction from the steaming / column column area under the air stream Separated and cooled enough to condense a portion of it to form a second vapor stream and a second liquid stream; (6) at least a portion of the second liquid stream is supplied to the distillation column as another feed , The feed point is the same as the distillation vapor stream is withdrawn from the distillation column __ page 87 This paper size applies to China National Standard (C! NrS) A4 specifications (210X297 mm) 580554 A8 B8 C8 D8 Six The position of the scope of patent application is almost the same; (Please read the notes on the back before filling this page) (7) At least a part of the expanded first vapor stream is in the distillation column and at least a part of the second liquid stream The remaining part is in close contact; (8) A distilled liquid stream is extracted from the distillation column above the distillation vapor stream extraction position, where the distilled liquid stream is heated, Is supplied to the distillation column as another kind of feed, and the position of the feed point is located below the position where the distillation vapor stream is evacuated from the column; (9) the second vapor stream is relatively The volatile distillate vapor streams are combined to form a volatile residual gas stream portion that includes the methane and a lighter component; and (10) the volatile residual gas stream portion is such that it can Member of the Intellectual Property Bureau. Printed by the Industrial and Consumer Cooperatives Part of the condensation condenses and forms the condensed air stream under the pressure of \ cooling. 2 7.  -An improved method for liquefying natural gas containing methane and heavy hydrocarbons, where: (a) The natural gas stream is condensed and shaped at least in part. Page 88 This paper applies Chinese National Standards (CNS) A4 specification (210X297 mm) 580554 A8 B8 C8 D8 VI. Patent application scope (please read the notes on the back before filling this page) to cool under the pressure of a condensed airflow; and (b) the condensed airflow is expanded to a low pressure To form the liquefied natural gas stream; wherein the improvement basically includes the following processing steps: (1) the natural gas stream is processed through one or more cooling steps; (2) the condensed natural gas stream is expanded to a moderate pressure; ( 3) The expanded, cooled natural gas stream is led to a distillation column, where the stream is divided into a volatile residual gas stream that contains the main part of the methane and a lighter composition; and a relative It is said that the less volatile part is the main part containing the heavy hydrocarbon composition; the member of the Intellectual Property Bureau of the Ministry of Economic Affairs X Consumer Cooperatives (4) the portion of the volatile residue gas stream may be based on at least a portion of the condensate condensed and formed at a pressure of cooling air flow. • 28.  -An improved method for liquefying natural gas containing methane and heavy hydrocarbons, wherein: (a) The natural gas stream is condensed and shaped at least in part. Page 89 This paper applies Chinese National Standards (CNS) A4 specification (210X297 mm) 580554 A8 B8 C8 D8 VI. Patent application scope (please read the precautions on the back before filling this page) to cool under the pressure of a condensed airflow; and (b) the condensed airflow is expanded to a low pressure To form the liquefied natural gas stream; wherein the improvement basically includes the following processing steps: (1) the natural gas stream is processed by one or more cooling steps to partially condense it; (2) the partially condensed natural gas stream is It is divided into at least one vapor stream and a liquid stream; (3) The vapor stream is expanded to a medium pressure; (4) The liquid stream is expanded to a medium pressure; printed by the Intellectual Property Bureau of the Ministry of Economic Affairs · Industrial and Consumer Cooperatives ( 5) At least one of the expanded vapor stream and the expanded liquid stream are introduced into a distillation column, wherein the stream is divided into a volatile Residual gas stream, which contains the main part of the formazan and lighter composition; and a relatively less volatile part, which contains the main part of the heavy hydrocarbon composition; (6) the volatile residue The airflow portion is cooled under a pressure that can condense at least a portion of it and form the condensed airflow. 29 · If the scope of patent application is 3, 4, 5, 1 1, 12, 1, 3, 14, 1, 5, _ page 90 This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) 8 8 8 8 ABCD 580554 VI.Applicable patent range 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, (Please read the precautions on the back before writing this page) or 2 of 8 The improved method of any one of the preceding claims, wherein the volatile residual gas stream portion is compressed and then cooled under a pressure that can condense at least a portion of it to form the condensed gas stream. 30. The improved method according to any one of claims 1 or 6, wherein (1) the volatile residual gas stream portion is compressed and then cooled under a pressure that can condense at least a portion of it; 2) The condensing part is divided into at least two parts to form the condensing gas stream and the liquid stream. 3 1. The improved method according to any one of claims 2, 7 or 8, wherein (1) the volatile residual gas stream portion is compressed and then cooled under a pressure that can condense at least a portion of it; and ( 2) The condensing portion is divided into at least two portions' to form the condensing gas stream and the second liquid stream. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 3 2. The improved method as described in item 9 of the scope of patent application, wherein the more volatile distilled vapor stream is compressed and then combined with the vapor stream to form the volatility of the main part containing the methane and lighter composition Residual airflow. P.91 This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) ABCD 580554 6. Scope of patent application (Please read the precautions on the back before writing this page) 3 3. The improved method as described in item 10 of the scope of patent application, wherein the more volatile distilled vapor stream is compressed and then combined with the second vapor stream to form the main part of the methane-containing and lighter composition The volatile residual airflow. 3 4 · If the scope of patent application is 3, 4, 5, 1 1, 1, 2, 1, 3, 14, 1, 5, 16, 17 '18, 19, 20, 21, 22, 23, 24, 25, 26, The improved method according to any one of 27, or 28, wherein the volatile residual gas stream portion is heated, compressed, and then cooled under a pressure " that can condense at least a part of it to form the condensed gas stream. 3 5. The improved method according to any one of claims 1 or 6, wherein (1) the volatile residual gas stream portion is heated, compressed, and then cooled under a pressure capable of condensing at least a portion of it; and ( 2) The condensing part is divided into at least two parts to form the condensing airflow and the. Liquid flow. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs X Consumer Cooperatives 3 6. The improved method according to any one of claims 2, 7, or 8, wherein (1) the volatile residual gas stream portion is heated, compressed, and then cooled under a pressure capable of condensing at least a part of it; And (2) The condensation part is divided into at least two parts to form the condensation. Page 92 The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 A8 B8 C8 D8. The brother-a liquid stream. (Please read the notes on the back before filling out this page) • 3 7. The improved method described in item 9 of the scope of the patent application, wherein the more volatile distilled vapor stream is heated, compressed, and cooled, and then combined with the vapor stream to form the main methane-containing and lighter composition. Partial volatile residual airflow. 3 8. The improved method as described in item 10 of the scope of patent application, wherein the more volatile distilled vapor stream is heated, compressed, and cooled, and then combined with the second vapor stream to form the methane-containing and lighter composition The main part of this volatile residual airflow. 3 9 · If the scope of patent application is No. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23, 24, 25, 26, 27, 28, 32, 33, 37, or 38, wherein the volatile residual gas stream portion comprises the methane, a lighter composition, and C2 The main part of the composition. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 40. If the scope of patent application is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 , 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 32, 33, 37, or 38, wherein the volatile residual gas stream portion includes the Main components of methane, lighter composition, C2 composition and C3 composition. — P.93 The paper size is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) 580554 A8 B8 C8 D8 6. Scope of patent application (Please read the precautions on the back before writing this page) 4 1.  An improved device capable of liquefying a natural gas stream containing methane and heavy hydrocarbon materials, the device comprising: (a) one or more first heat exchange devices that are operatively connected to receive the natural gas stream, and Cooling it under a pressure at least partially condensable to form a condensed airflow; and (b) a first expansion device connected to the first heat exchange device to receive the condensed airflow and expand it To low pressure to form the liquefied natural gas stream; improvements to the equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and cool it under pressure; (2) ) A second expansion device, which is operatively connected to the second heat exchange device to receive the cooled natural gas stream 'and expand it to a moderate pressure; printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Cooperative (3) One distillation column ,. It is connected to receive the expanded, cooled natural gas stream, and the distillation tube column can divide the gas stream into a volatile residual gas portion, which contains the main part of the methane and lighter composition; and a relatively speaking The less volatile part, which is the main part containing heavy hydrocarbons; (4) The first heat exchange device is connected to the distillation column to connect to page 94. The paper size applies Chinese National Standard (CNS) A4 Specifications (210X297 mm) 8 8 8 8 ABCD 580554 6. Scope of patent application (please read the precautions on the back before filling this page) Receive the part of the volatile residual gas, where the first heat exchange device can volatile The residual gas portion is cooled under a pressure that can condense at least a portion of it; (5) a separation means connected to the first heat exchange device to receive the condensed portion and divide it into at least a rain portion to form The condensed gas stream and a liquid stream, the separation device may be further connected to the distillation pipe column to guide the liquid stream into the distillation pipe column as its top feed; and (6) A control device that can regulate the amount and temperature of the feed gas flow to the distillation column to maintain the temperature above the distillation column in a way that can recover the relatively less volatile part from the The temperature of the main part of heavy hydrocarbons. 42.  An improved device that can liquefy a natural gas stream containing methane and heavy hydrocarbons. The device includes: Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Cooperative, (a) one or more first heat exchange devices, which can be Operatively connected to receive the natural gas stream and cooled under a pressure at least a portion of which can be condensed to form a condensed gas stream; and (b) a first expansion device connected to the first heat exchange device, To receive the condensed gas stream and expand it to a low pressure to form the liquefied natural gas stream; page 95 This paper applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 A8 B8 C8 D8 Improvements to the equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and cooled at a pressure sufficient to partially condense it; (2) a separation device that is connected To the second heat exchange device to receive the partially condensed natural gas stream and divide it into a vapor stream and a first liquid stream; (3) a second expansion Device, which is operatively connected to the separation device to receive the vapor stream and expand it to a moderate pressure; (4) a third expansion device, which is operatively connected to the separation device to receive the first A liquid stream and expanding it to a moderate pressure; (5) a distillation tube string connected to receive the expanded vapor stream and the expanded first liquid stream, and the distillation tube string may divide the gas stream into A volatile residual gas portion comprising the main portion of the pinane and a lighter composition; and a relatively less volatile portion comprising the main component of a heavy hydrocarbon; (6) the first A heat exchange device is connected to the distillation column to receive the volatile residual gas portion, wherein the first heat exchange device can cool the volatile residual gas portion under a pressure that can condense at least a portion of it; (7 ) Separating device, which is connected to the first heat exchanging device, applies the Chinese National Standard (CNS) A4 specification (210X297 mm) on the paper size on page 96. . . . . . . . . . . . :fee. . . . . . . . . -IT. . . . . . . . .  (Please read the notes on the back before filling this page) ABCD 580554, printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Cooperatives 6. Scope of patent application (please read the notes on the back before filling this page) Receive the condensation part and Divided into at least two parts to form the condensed gas stream and a second liquid stream, and the separation device may be further connected to the distillation pipe column to guide the second liquid stream into the distillation pipe column as its top feed; and (8 A control device that can regulate the amount and temperature of the feed gas flow to the distillation column to maintain the temperature above the distillation column in a way that the heavy carbon can be recovered from the relatively less volatile portion The temperature of the main part of the hydrogen substance. 4 3.  -An improved device capable of liquefying a natural gas stream containing pinane and heavy hydrocarbons, the equipment comprising: (a) one or more first heat exchange devices which are operatively connected to receive the natural gas stream And cooled under a pressure at least a part of which can be condensed to form a condensed airflow; and (b) a first expansion device, which is connected to the first heat exchange device, a member of the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Cooperatives Configured to receive the condensed gas stream and expand it to a low pressure to form the liquefied natural gas stream; improvements to the equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the gas stream Natural gas flow and cooling under pressure; (2) a separation device connected to the second heat exchange device to receive the cooled natural gas flow and divide it into at least one page 97 This paper applies Chinese National Standards (CNS) A4 specification (210X297 mm) 580554 A8 B8 C8 D8 Six, the scope of the patent application is a first steam flow and a second steam flow; (Please read the note on the back first (Reprint this page) (3) A third heat exchange device connected to the separation device to receive the first vapor stream and cool it under a pressure sufficient to cause it to almost condense; (4) a second expansion device , Which is operatively connected to the third heat exchange device to receive the nearly condensed first vapor stream and expand it to a moderate pressure; (5) a third expansion device, which is operatively connected To the separation device to receive the second vapor stream and expand it to the intermediate pressure; (6) a steam pipe string connected to receive the expanded, nearly condensed second vapor stream and the expanded first A two-vapor gas stream, and the distillation column system can divide the gas stream into a volatile residual gas portion, which contains the main part of the methane and a lighter composition; and a relatively less volatile portion, which contains The main part of heavy hydrocarbons; printed by the member of the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Cooperative, (7) the first heat exchange device is connected to the distillation column to receive the volatile residual gas portion, wherein the first The heat exchange device is capable of cooling a part of the volatile residual gas under a pressure capable of condensing at least a part of it to form the condensed gas stream; and (8) a control device for regulating the inlet flow to the distillation column The amount and temperature of the material gas flow to maintain the distillation column, page 98. The paper dimensions are applicable to China National Standard (CNS) A 4 specifications (210 X 297 mm) ABCD 580554 6. Scope of patent application (please read the Note: Please fill in this page again) The temperature above is a temperature at which the main part of the heavy hydrocarbon can be recovered from the relatively less volatile part. 44.  An improved device capable of liquefying a natural gas stream containing methane and heavy hydrocarbon materials, the device comprising: (a) one or more first heat exchange devices that are operatively connected to receive the natural gas stream, and Cooling at a pressure at least a part of which can be condensed to form a condensed airflow; and (c) a first expansion device connected to the first heat exchange device to receive the condensed airflow and expand it to a low pressure To form the liquefied natural gas stream; improvements to the equipment include: (1) one or more second heat exchange devices operatively connected to receive the natural gas stream and cool it at a pressure sufficient to partially condense it; Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (2) Separating device connected to the second heat exchange device to receive the partially condensed natural gas stream and divide it into a vapor stream and a liquid stream; (3) Differentiating device (Dividing means) connected to the separation device to receive the vapor stream and distinguish it into at least one first vapor stream and one The second vapor stream; (4) the third heat exchange device, which is connected to the distinguishing device, applies the Chinese National Standard (CNS) A4 specification (210X297 mm) on page 99 of this paper standard 580554 A8 B8 C8 D8 VI. Application The patent scope receives the first vapor stream and cools it to almost full condensation; (Please read the precautions on the back before writing this page) (5) The second expansion device, which is connected to the third heat exchange device To receive the almost fully condensed first vapor stream and expand it to a moderate pressure; (6) a third expansion device connected to the division device to receive the second vapor stream and expand it to the medium Pressure; (7) a fourth expansion device connected to the separation device to receive the liquid stream and expand it to the intermediate pressure; (8) a distillation column connected to receive the expansion, almost all The condensed first vapor stream, the expanded second vapor stream, and the expanded liquid stream, and the distillation column system can divide the gas stream into a volatile residual gas portion, which contains the methane and Composition of the main portion of the light; and is a relatively less volatile portion with which the system comprises a major portion of the heavy hydrocarbon material; Economic Intellectual Property Office employee consumer cooperative printed (9) of the first heat exchanger. A device is connected to the distillation column to receive the volatile residual gas portion, wherein the first heat exchange device can cool the volatile residual gas portion under a pressure capable of condensing at least a portion thereof to form the condensed gas stream ; And (10) a control device that can regulate the amount and temperature of the feed gas flow to the distillation column to maintain the distillation column, page 100. The paper size applies to Chinese National Standard (CNS) A4. Specifications (210X297 mm) 580554 Member of the Intellectual Property Bureau of the Ministry of Economic Affairs X printed by Consumer Cooperatives A8 B8 C8 D8 6. The temperature above the scope of the patent application is a major part of the heavy hydrocarbons that can be recovered from the relatively less volatile part Temperature. 45 · — An improved device that can liquefy a natural gas stream containing methane and heavy hydrocarbons, the device comprising: (a) —or one or more first heat exchange devices that are operatively connected to receive the The natural gas stream is cooled under a pressure that can condense at least a portion of it to form a condensed stream; and (b) a first expansion device connected to the first heat exchange device to receive the condensed stream and It expands to a low pressure to form the liquefied natural gas stream; improvements to the equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and to sufficiently condense it partially Cooling under pressure;   (2) a separation device connected to the second heat exchange device to receive the partially condensed natural gas stream and divide it into a vapor stream and a liquid stream; (3) a separation device connected to the separation device to Receiving _ steam stream and distinguishing it into at least one first steam stream and one second steam stream; (4) combining means, which are connected to, page 101 This paper applies Chinese national standards (CNS) ) A4 specifications (210X297 mm) — — — — — — — — — — — ^ (Please read the notes on the back before writing this page) 580554 A8 B8 C8 D8 VI. Patent Application Scope (Please read first Note on the back then fill out this page) Differentiate the device and the separation device to receive the first vapor flow and at least a portion of the liquid flow and merge them into a combined air flow; (5) a third heat exchange device. , Which is connected to the combined device to receive the combined airflow and cool it to almost all condensation; (6) a second expansion device, which is connected to the third heat exchange. A device to receive the almost fully condensed combined gas stream and expand it to a moderate pressure; (7) a third expansion device connected to the division device to receive the second vapor stream and expand it to the medium pressure (8) a fourth expansion device connected to the separation device to receive any remaining portion of the liquid stream and expand it to the medium pressure office; printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (9) a distillation A column connected to receive the expanded, nearly fully condensed combined gas stream, the expanded second sacrifice gas stream, and the remainder of the expanded liquid stream, and the distillation column system can divide the gas stream into one Volatile residual gas portion, which is the main portion containing the methane and a lighter composition; and a relatively less volatile portion, which is the main component of the heavy hydrocarbon material; (10) the first A heat exchange device is connected to the distillation column to receive the volatile residual gas portion. The first heat transfer page 102 of this paper applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 580554 8 8 88 ABCD patent application range change device is capable of cooling the volatile residual gas part under a pressure that can condense at least a part of it to form the condensed gas stream; and (11) a control device, which The amount and temperature of the feed gas flow to the distillation column can be adjusted to maintain the temperature above the distillation column in a major portion that can recover the heavy hydrocarbons from the relatively less volatile portion 0 at the temperature of 0 printed by the Intellectual Property Bureau of the Ministry of Economy X Consumer Cooperatives  -An improved device capable of liquefying a natural stream containing methane and heavy hydrocarbons, the device comprising: (a)-or a plurality of first heat exchange devices, which are operable to receive the natural gas stream, and Cooling at least partially condensable pressure to form a condensation and (b) a first expansion device connected to the first heat exchange to receive the condensed gas stream and expand it to a low pressure to liquefy the natural gas stream; the Improvements to the equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas flow and under pressure, (2) a first distinguishing device that is connected to the second heat exchanger In order to receive the cooled natural gas flow and connect it to one of them in a gas-type manner, the device is formed to divide the cold-exchange equipment into II% IC. Please read the precautions on the back before filling in this section. 103 pages of this paper are in accordance with Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 A8 B8 C8 D8 Six, the scope of patent application for at least one first vapor stream and one second vapor stream, ( (Please read the notes on the back before transcribing this page) • (3) The third heat exchange device is connected to the first division device to receive the first vapor stream and cool it to almost all condensation; ( 4) a second swelling device, which is connected to the third heat exchange device to receive the almost all condensed first vapor stream. And expand it to an intermediate pressure; (5) a third expansion device connected to the first division device to receive the second vapor stream and expand it to the intermediate pressure; (6) a distillation column, It is connected to receive the expanded, nearly fully condensed first vapor stream and the expanded second vapor stream, and the distillation column system can divide the gas stream into a volatile residual gas portion that contains the methane and The main part of the lighter composition; and a relatively less volatile part, which is the main part containing the heavy hydrocarbon substance; printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (7) the first heat exchange device Is connected to the distillation column to receive the volatile residual gas portion, and the first heat exchange device can cool the volatile residual gas portion under a pressure sufficient to partially condense it; (8) the second division The device is connected to the first heat exchanging device to receive the condensing part and divide it into at least two pages. This paper size is applicable to China National Standard (CNS) A4 (210X297). (Centi) 54 05 8 5 ABCD j VI. Application for patent scope part to form the condensed gas stream and a liquid stream; the second distinguishing device can be connected to the distillation pipe column to guide the liquid stream into the distillation pipe column As its top feed; and (9) a control device that can regulate the amount and temperature of the feed gas flow to the distillation column to maintain the temperature above the distillation column It is said that at a temperature of less than volatile pulling part to recover the main part of the heavy hydrocarbons, the temperature is 0 47 • —an improved device that can liquefy a natural gas stream containing methane and heavy hydrocarbons. The device includes: (a) — Or one or more first heat exchange devices that are operatively connected to receive the natural gas stream and are cooled at a pressure that can at least partially condense it to form a condensed gas stream; and (b) a first expansion device, It is connected to the first heat exchange device to receive the condensed gas stream and expand it to a low pressure to form the liquefied natural gas stream; improvements to the equipment include: (1) one or more second heat exchanges A device which is operatively connected to receive the natural gas flow and stop it under pressure, (2) a separation device which is connected to the second heat exchange device to receive and distinguish the partially condensed natural gas flow For page 105, this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm). . . . . . . . . . . . . Mwi I C, please read the precautions on the back and fill in this page) Order _ Member of Intellectual Property Bureau, Ministry of Economic Affairs. Printed by the Industrial and Consumer Cooperatives 580554 A8 B8 C8 D8 VI. Patent application scope A vapor flow and a first liquid flow; (Please read the precautions on the back before writing this page) (3) The first distinguishing device, which is connected To the separation device to receive the steam flow and distinguish it into at least one first steam flow and a second steam flow; (4) a third heat exchange device connected to the first separation device to receive the first Vapor stream and cool it to almost all condensation; (5) a second expansion device connected to the third heat exchange device to receive the almost fully condensed first vapor stream and expand it to a moderate pressure (6) a third expansion device connected to the first division device to receive the second vapor stream and expand it to the intermediate pressure; (7) a fourth expansion device connected to the separation device to Receive the first liquid stream and expand it to the medium pressure; member of the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Cooperative, prints (8) a distillation column, which is Connected to receive the expanded, nearly fully condensed first vapor stream, the expanded second vapor stream, and the expanded first liquid stream, and the distillation column system may divide the gas stream into a volatile residual gas portion Which contains the main part of the pinane and a lighter composition; and a relatively less volatile part which contains the main part of the heavy hydrocarbon substance; (9) the first heat exchange device is connected To the distillation column to receive the volatile residual gas portion, the first heat exchange page 106 This paper size applies Chinese National Standard (CNS) A4 Regulation (210X297 mm) 580554 A8 B8 C8 6. The scope of the patent application device can cool the volatile residual gas under a pressure sufficient to partially condense it; (Please read the precautions on the back before filling this page) (10) The first distinguishing device is connected to The first cooked exchange device receives the condensing part and divides it into two parts to form the condensed gas stream and a second liquid stream. The second distinguishing device can be further connected to the distillation column to guide Directing the second liquid into the distillation tube column as its top feed; and (1 1) a control device that can regulate the amount and temperature of the feed gas flow to the distillation tube to maintain The temperature above the distillation tube is at a temperature at which the main part of the heavy hydrocarbon material can be recovered from the relatively less volatile part. 0 48 ·-a natural gas stream that can liquefy methane and heavy hydrocarbon materials The improved equipment includes: (a) printed by the Consumers of Intellectual Property Bureau of the Ministry of Economic Affairs (a)-or more first heat exchange devices, which can be forgedly connected to receive the natural gas stream, and It can be cooled at least / partially condensed to form a condensed gas stream; and (b) a first expansion device connected to the first heat exchange device to receive the condensed gas stream and expand it to a low pressure To form the liquefied natural gas stream; the improvement of the equipment includes: The 10th paper standard is applicable to Chinese National Standard (CNS) A4 specifications (210 X 297 public love) 8 8 88 ABCD 580554 6. Scope of patent application (please read first (Notes on the back, please fill out this page) (1) One or more second heat exchange devices that are operatively connected to receive the natural gas stream and cool it under a pressure sufficient to partially condense it; (2) A separation device connected to the second heat exchange device to receive the partially condensed natural gas flow and distinguish it into a vapor flow and a first liquid flow; (3) a first separation device connected to the separation A device for receiving the vapor stream and distinguishing it into at least a first vapor stream and a second vapor stream; (4) a combining means connected to the first A sub-device and the separation device to receive the first vapor stream and at least a portion of the first liquid stream and combine them into a combined air stream; (5) a third heat exchange device connected to the combined device to receive the Combined airflow and cooled it to almost all condensation; Printed by (6) a second expansion device of the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Cooperative, which is connected to the third heat exchange device to receive the almost all condensation Air flow and expand it to a moderate pressure; (7) a third expansion device connected to the first division device to receive the second vapor flow and expand it to the intermediate pressure; (8) a fourth expansion device It is connected to the separation device to receive any remaining part of the first liquid stream and expand it. Page 108 The paper size is applicable to National Standard (CNS) A4 (210X297 mm) ABCD 580554 6. Apply for a patent Range to this moderate pressure; (please read the notes on the back before filling out this page) (9) a distillation column connected to receive the expanded, almost fully condensed combined gas , The expanded second vapor stream, and the remainder of the expanded first liquid stream, and the distillation column system can divide the gas stream into a volatile residual gas portion, which contains the methane and a lighter composition The main part; and a relatively less volatile part, which is the main part containing the heavy hydrocarbon substance; (10) the first heat exchange device is connected to the distillation column to receive the volatilization The first heat exchange device can cool the volatile residual gas portion under a pressure sufficient to partially condense it; (11) the second division device is connected to the first heat exchange device to Receiving the condensing part and dividing it into at least two parts to form the condensing gas stream and a second liquid stream; the second distinguishing device may be further connected to the distillation pipe column to guide the second liquid stream to the distillation pipe In the column as its top feed; and a member of the Intellectual Property Bureau of the Ministry of Economic Affairs. Industrial and consumer cooperative printing (12) control device, which can regulate the amount and temperature of the feed gas flow to the distillation tube column In order to maintain the temperature above the distillation column at a temperature at which the main part of the heavy hydrogen substance can be recovered from the relatively less volatile part. Page 109 This paper size applies Chinese National Standard (CNS) A4 specifications (210X 297mm) ABCD 580554 VI. Application for patent scope 49. An improved device that can liquefy natural gas flow containing methane and heavy hydrocarbons. The device contains: (Please read the precautions on the back before filling in this (A) (a) one or more first heat exchange devices that are operatively connected to receive the natural gas stream and are cooled at a pressure at least partially condensable to form a condensed gas stream; and ( b) an expansion device connected to the first heat exchange device to receive the condensed gas stream and expand it to a low pressure to form the liquefied natural gas stream; improvements to the equipment include: (1) one or more A second heat exchange device that is operatively connected to receive the natural gas stream and is cooled at a pressure sufficient to partially condense it; (2) a second expansion device that is Connected to the second heat exchange device to receive the partially condensed natural gas flow and expand it to a moderate pressure; a member of the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Cooperative, printed (3) a separation device connected to the second expansion device To receive the expanded, cooled natural gas stream and divide it into a vapor stream and a liquid stream; (4) a third expansion device connected to the separation device to receive the liquid stream and expand it to a low pressure; (5) ) A distillation column connected to receive the expanded liquid stream, and the distillation column can divide the gas stream into a volatile distillation vapor; and a relatively less volatile page 110 This paper is applicable to China National Standard (CNS) A4 specification (210X297 mm) 580554 A8 B8 C8 D8 6. The scope of the patent application is the main part containing the heavy hydrocarbon; (Please read the precautions on the back before copying (Pages) • (6) combining means connected to the separation device and the distillation column to receive the vapor stream and the volatile distillate Gas and combine it into a volatile residual gas portion containing the methane and a lighter major portion; (7) the first heat exchange device is connected to the combination device to receive the volatile residual gas portion, wherein the The first heat exchange device can cool the volatile residual gas under a pressure that can condense at least two of them to form the condensed gas stream; and (8) a control device that can regulate the flow to the distillation column The amount and temperature of the feed gas stream to maintain the temperature above the distillation column at a temperature at which the major portion of the heavy hydrocarbon can be recovered from the relatively less volatile portion. Member of the Intellectual Property Bureau of the Ministry of Economic Affairs. Printed by the Industrial and Consumer Cooperatives. — An improved device that can liquefy a natural gas stream containing methane and heavy hydrocarbons. The device includes: (a) one or more first heat exchange devices, It is operatively connected to receive the natural gas stream, and is cooled under a pressure that can at least partially condense it to form a condensed gas stream; and page ⑴ This paper is sized to the Chinese National Standard (CNS) A4 regulations 210 (210X297mm) 580554 8383 ABCD VI. Applying for a profit-seeking fan garden (b) The first expansion device is connected to the first heat exchange device to receive the condensed gas stream and expand it to a low pressure to form the liquefied Natural gas flow; improvements to the equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas flow and cool it at a pressure sufficient to partially condense it; (2) the first A separation device is connected to the second heat exchange device to receive the part of the cold and condensed natural gas flow and divide it into a first vapor flow and a first liquid flow; First read the notes on the back and then fill out this page. (3) The second expansion device is connected to the first to receive the first vapor stream and expands the pressure; (4) The second separation device, which is Connected to the second to receive the expanded first vapor stream and to seed the second vapor stream to a second liquid stream; (5) a third expansion device connected to the second to receive the second liquid stream And expand it to a medium pressure; (6) a fourth expansion device connected to the first to receive the first liquid stream and expand it to a medium pressure; (7) a distillation column connected In order to receive the expanded liquid stream and the expanded first liquid stream, and the separation mist is set to a medium expansion device, it is divided into a separation device, a lower separation device, a lower expansion second, and the second distillation tube. This paper size is applicable to the national standard (CNS) A4 specification (210 X 297 mm) ABCD 580554 6. Applying for a profit margin 利 The column system can divide the gas stream into a volatile distilled vapor; and a relatively less volatile vapor Sexual part It is composed of the main part of the heavy hydrocarbon material; (8) combining means connected to the second separation device and the distillation column to receive the second vapor stream and the volatilization The steam is distilled and combined into a volatile residual gas portion containing the methane and a lighter main component; (9) the first heat exchange device is connected to the combined device to receive the volatile residual gas portion Wherein the first heat exchange device can cool the volatile residual gas under a pressure that can condense at least a part of it to form the condensed gas stream; and (10) a control device that can regulate the flow The amount and temperature of the feed gas stream to the distillation tube 'column to maintain the temperature above the distillation tube column at a temperature that can recover a major portion of the heavy hydrocarbon material from the relatively less volatile * part -p · 〇51. — An improved device for liquefying a natural gas stream containing methane and heavy hydrocarbons, the device includes: (a) • one or more first heat exchange devices, which can be Operatively connected to receive the natural gas stream, and cooled under a pressure that can at least partially condense it to form a condensed gas stream; page 113 This paper is sized for the Chinese National Standard (CNS) A4 specification (210X297 mm) ) ............. Install: (please read the notes of Φ before filling in this page) • Order · 580554 A3 B3 C8 D3 VI. Application for Patent Park and (b) The first expansion device, which is connected to the first heat exchange device, (please read the notes of «Notes before filling out this page) • to receive the condensed gas stream and expand it to a low pressure to form the liquefied natural gas Airflow; improvements to this equipment include: (.1) one or more second heat exchange devices that are operatively connected to receive the natural gas airflow and cool it under pressure; (2) a second expansion and expansion device , Which is connected to the second heat exchange device to receive the cooled natural gas stream and expand it to a moderate pressure; (3) the contact and separation device is connected to receive the expanded, cooled natural gas stream, the contact and The separation device contains at least one A contact device to allow vapor and liquid to be mixed with each other, and includes a separation device to facilitate separation of vapor and liquid after mixing, forming a volatile residual gas portion containing the main part of the methane and the lighter composition; And a first liquid stream; (4) a distillation column connected to receive the first liquid stream, and the distillation column can divide the gas stream into a volatile distillation vapor; and a relative Said the less volatile part, which is the main part containing the heavy hydrocarbon substance; (5) a third heat exchange device, which is connected to the distillation column to receive the volatile distillation vapor and cool it to At least one page 114 This paper is sized to Chinese National Standard (CNS) A4 specification C210X297 mm) 52 · Partially condensed to form a second liquid flow; V ^) ^ X can be connected to the separation device if it touches the separation device Three heat devices are arranged to receive the second liquid stream, so that at least a portion of the rim and the cooled natural gas stream are in close contact with the second liquid stream of at least a portion of the contact device. A heat exchange device is connected to the contact and branch to receive the volatile residual gas portion, wherein the heat exchange device is capable of cooling the volatile residual gas under a pressure capable of condensing at least a portion thereof to form the condensed gas stream; and A stand-up device that can adjust the measurement of the feed gas flow to the contact and separation and the distillation column to maintain the temperature of the contact and separation device and the distillation The next improved equipment that does not have a major portion of the heavy hydrocarbon material recovered can liquefy a natural stream containing methane and heavy hydrocarbon materials, the equipment comprising: (a) one or more first heat An exchange device that is operatively connected to receive the natural gas stream and is cooled under a pressure that can at least partially condense it to form a condensate and (b) a first expansion device connected to the first heat Exchange on page 115. The exchange part is separated from the part I, which is connected with the air temperature of the separation and the temperature of the warm pipe column; Set, ABCD 580554 6. Application Lee Fan Garden receives the condensed gas stream and expands it to a low pressure to form the liquefied natural gas stream; (please read the notes of ** before filling out this page} • Improvements to this equipment include: (1) one or more A second heat exchange device that is operatively connected to receive the natural gas stream and cooled to a partial condensation under pressure; (2) a separation device that is connected to the second heat exchange device to receive the The partially condensed natural gas stream is divided into a vapor stream, a first liquid stream (3), and a second expansion device connected to the separation device to receive the vapor-gas stream and expand it to a moderate pressure; (4 A contacting and separating device connected to receive the expanded vapor stream, the contacting and separating device comprising at least one contacting device so that the vapor and the liquid can be mixed with each other, and including a separating device for separating the vapor and the liquid after mixing, Forms a volatile residual gas portion containing the main part of the methane and the lighter composition; and a second liquid stream; (5) a third expansion device It is connected to a separation device to receive the first liquid stream and expand it to the intermediate pressure; (6> a distillation column connected to receive the second liquid stream and the expanded A first liquid stream, and the distillation column system can divide the gas stream into a volatile distillation vapor; and a paper size on page 116 applicable to China National Standard (CNS) A4 specifications (210 > < 297 mm) 580554 A8 The relatively non-volatile part of the scope of BS C8 D3's patent application is the main part containing the heavy hydrocarbon material; (7) · The third heat exchange device 'is connected to the distillation column to receive the volatilization (2) The contact and separation device may be connected to the third heat exchanging device to receive the third liquid stream, so that at least A part of the vapor flow of the expanded gland is in close contact with at least a part of the third liquid stream in the contact device; (9) the first heat exchange device is connected to the contact and separation device to receive and receive the volatilization A residual gas portion, wherein the first heat exchange device can cool the volatile residual gas portion under a pressure that can condense at least a portion of it to form the condensed gas stream; and (1.0) a control device, which can Regulating the amount and temperature of the feed gas flow to the contact and separation device, and the steaming column to maintain the temperature above the contact and separation device and the distillation tube column The volatile part is recovered at a temperature of the main part of the heavy carbon argon substance. 53 · — An improved device for liquefying a natural gas stream containing methane and heavy hydrocarbons, the device includes ... (a)-or a plurality of first heat exchange devices, which are operatively connected to the Π7 The page size of the paper is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 580554 A3 BS C8 D3. The range is to receive the natural gas stream and to condense at least part of it. Cooling down to form a condensed gas stream; and (b) a first expansion device connected to the first heat exchange device to receive the condensed gas stream and expand it to a low pressure to form the liquefied natural gas stream; Improvements to the equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and cooled under pressure; (2) a second expansion device that is connected to the first Two heat exchange devices to receive the cooled natural gas stream and expand it to a moderate pressure; (3) a contact and separation device is connected to receive the expanded and cooled natural gas stream, and the contact and separation device includes At least one contact device so that the vapor and the liquid can be mixed with each other, and includes a separation device to separate the vapor and the liquid after mixing to form a first vapor flow and a first liquid flow; (4) a distillation column , Which is connected to receive the first liquid stream, and the distillation tube column system can divide the gas stream into a volatile distillation vapor; and a relatively less volatile-part, which contains the heavy hydrocarbon substance The main part; (5) a third heat exchange device, which is connected to the distillation column to receive the volatile distilled vapor and cool it to at least one page 118 Chinese National Standard (CNS) A4 Specifications (210 X 297 public love) ...... :: ... 4 packs: (please read the precautions of "« before filling in this page)-Force. 580554 A3 Β8 C8 D3 The scope of patent application is partially condensed; (6) A separation device connected to the third heat exchange device f & receiving the cooled volatile distilled vapor and dividing it into a second vapor flow and a second liquid flow; (7) a distinguishing device, Its connection The separation device receives the second liquid stream and divides it into at least a first part and a second part. The separation device can be connected to 3 distillation tubes to supply the second / Part to the steaming hall. The pipe column is used as the top feed; (8) The contacting and separating device can be connected to the separation device to receive the second part of the second liquid flow, so that at least / ^ the expansion The cooled natural gas stream is in close contact with at least a portion of the second portion of the second liquid stream in the contact device; (9) a merger device connected to the contact and separation device and the .separation device to receive The first vapor stream and the second vapor stream, and merge them into a volatile residual gas part containing the main part of the nail and lighter composition; (10) the first heat exchange device is connected to the merger A device for receiving the volatile residual gas portion, wherein the first heat exchange: the changing device is capable of cooling the volatile residual gas portion under a pressure capable of condensing at least a portion thereof to form the condensed gas stream And on page 119, the paper size is in accordance with the Chinese National Standard (CNS) A4 specification (210X297). I Read the precautions before binding, and then bind 580554 A3 B3 C8 D8 patent application scope ... ..4 Packing: (Please read the notes of * · © before filling out this page) (11) Control device, which can regulate the feed gas flow to the contact and separation device and the distillation column To maintain the temperature above the contact and separation device and the distillation column, which is relatively insignificant. The temperature of the main part of the heavy hydrocarbon recovered by the volatile part is 〇54. -An improved device capable of liquefying a natural gas stream containing methane and heavy hydrocarbons, the device comprising: (a) one or more first heat exchange devices which are operatively connected to receive the natural gas Air flow, and cooled at a pressure that can at least partially condense it to form a condensed air flow; and (b) a first expansion device connected to the first heat exchange device to receive the condensation Air flow and expand it to low pressure to form Liquefied natural gas stream; improvements to this equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and cool it at a pressure sufficient to cause a portion of it to condense; (1) 2) a first separation device connected to the second heat exchange device * to receive the partially condensed natural gas flow and divide it into a first vapor flow and a first liquid flow; (3) a second expansion device It is connected to the first separation device, page 120. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 ABCD patent application scope to receive the first vapor stream and expand it to a medium pressure ; (Please read the notes on the back of the page before filling in this page} (4) The contact and separation device is connected to receive the expanded first vapor stream, and the connection and separation device includes at least one contact device to Allows vapor and liquid to be mixed with each other and includes a separation device to facilitate separation of vapor and liquid after mixing to form a second vapor stream and a second liquid Bulk flow; (5) a third expansion device connected to the separation device to receive the first liquid stream and expand it to a moderate pressure; (6) a distillation column connected to receive the second A liquid stream and the expanded first liquid stream, and the distillation tube column system can divide the gas stream into a volatile distillation vapor; and a relatively less volatile part, which contains the heavy hydrocarbon substance The main part; (7) a third heat exchange device connected to the distillation column to receive the volatile distilled vapor and cooled under a pressure sufficient to condense at least a part of it; (8) a second separation device, which Is connected to the third heat exchange device to receive the cooled volatile distilled vapor and divides it into a third vapor stream and a third liquid stream; (9) a distinguishing device connected to the separation device to receive The third liquid stream is divided into at least a first part and a second part. The distinguishing device can be further connected to the paper strength: the national standard (CNS) A4 ^ ( 210 X 297 mm) 580554 ABCD patent application scope distillation tube column to supply the first part of the third liquid stream to the distillation tube column as its top feed; first read the notes on the back and then fill out this page (1 0 ·) the contact and The separating device may be further connected to the distinguishing device to receive the second part of the third liquid stream, so that at least a part of the expanded first vapor stream is in the contacting device and at least a part of the third liquid stream is first The two parts are in close contact, (1 1) a merging device, which is connected to the contacting and separating device and the separating device to receive and collect the second vapor flow and the third vapor flow, and merge them into two The volatile residual gas portion containing the main part of the formazan and lighter group; (12) the first heat exchange device is connected to the combined device to receive the volatile residual gas portion, wherein the first heat exchange The device can cool part of the volatile residual gas under a pressure that can condense at least part of it to form the condensed gas stream; and (13) a control device that can regulate the flow The amount and temperature of the feed gas flow to the contact and separation device and the distillation column to maintain the temperature above the contact and separation device and the distillation column can be relatively less volatile from that part. The temperature at which a major portion of the heavy hydrocarbon material is recovered. P.122 This paper is suitable for China National Standard (CNS) A4 (210 X 297 mm) 580554 A3 BS C8 D3 VI. Patent Application Park 55. — a kind of liquefiable composition containing methane and heavy hydrocarbons Improved equipment for natural gas flow, this equipment contains: (Please read the note of Readme® before filling out this page) • (a) one or more first heat exchange devices that are operatively connected to receive the natural gas Air flow, and cooled at a pressure that at least partially condenses to form a condensed air flow; and (b) a first expansion device connected to the first heat exchange device to receive the condensed air flow and It expands to a low pressure to form the liquefied natural gas stream. Improvements to the equipment include: (1) one or more second heat exchange devices that are operable to be connected in type to receive the natural gas stream And cooled under pressure; (2) a second expansion device connected to the second heat exchange device to receive the cooled natural gas stream and 'expand it to a moderate pressure; (3) a contact and separation device connected To receive Expansion, cooling * natural gas flow, the contacting and separating device includes at least one contacting device so that vapor and liquid can be mixed with each other, 齐 部 窨 窨 wlmirwarr. 肖 费 全 Cha ii- 上海 致 * · and includes a separating device In order to separate the vapor and liquid after mixing to form a volatile residual gas portion, which is the main part containing the methane and a lighter composition; and. A first liquid stream; (4) a third heat exchange device, which It is connected to the separation device to receive the first liquid stream and heat it; page 123. The strength of the paper is in accordance with China National Standard (CNS) A4 specification (210X297). 580554 A3 B3 C8 D3 1 First read the notes on the back and then fill in the notebook 2 (5) A distillation tube 拄, which is connected to receive the heated first liquid stream, and the distillation tube column can divide the gas stream into one. Volatile distillation vapor; and a relatively less volatile portion, which is the main part containing the heavy hydrocarbon substance; (.6) a fourth heat exchange device, which is connected to the steam A column to receive the volatile distilled vapor and cool it under a pressure sufficient to condense at least a portion of it to form a second liquid stream; (7) the contact and separation device may be further connected to the fourth heat exchange device to Receiving the second liquid stream so that at least a portion of the expanded, cooled natural gas stream is in close contact with at least a portion of the second liquid stream in the contact device; (8) the first heat exchange device is connected to The contacting and separating device to receive the volatile residual gas portion, wherein the first heat exchange device can cool the volatile residual gas portion under a pressure capable of condensing at least a portion thereof to form the condensed gas stream; and (9) Control device, which can regulate the amount and temperature of the feed gas flow to the contact and separation device and the distillation tube, to maintain the contact and separation device and the distillation column. At a temperature at which a major portion of the reconstituted hydrogen species can be recovered from the relatively less volatile portion. Page 124 The epidemic scale of this paper conforms to the Chinese National Standard (CNS) A4 specification (2) 297 × public product 580554 A8 BS C8 D3 VI. Patent application scope (please read the precautions for the first time and read the notes before you fill in the original text) 5 6. — An improved device capable of liquefying a natural gas stream containing methane and heavy hydrocarbons, the device comprising: (a) — or a plurality of first heat exchange devices that are operatively connected to receive The natural gas stream is cooled at a pressure at least one of which can be partially condensed to form a condensed gas stream; and (b) a first expansion device is connected to the first heat exchange device to receive the Condensing the gas stream and expanding it to a low pressure to form the liquefied natural gas stream. Modifications of the equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and Cooling at a pressure sufficient to make one of them partially condensed; (2) a separation device connected to the second heat exchange device to receive the partially condensed natural gas stream and divide it into a first vapor stream and a first A liquid stream; (3) a second expansion device connected to the separation device to receive the first vapor stream and expand it to a moderate pressure; (4) a contact and separation device connected to receive the expansion The first vapor flow, the contacting and separating device includes at least one contacting device so that the vapor and the liquid can be mixed with each other, and includes a separating device to facilitate the mixing of the vapor and the liquid after mixing. (CNS) A4 specifications (210X297 mm) 580554 A8 B3 C8 D3 Patent Application Park (please read the back- «Notes before filling this page} body separately to form a volatile residual gas part, which contains The main part of the torrefied and lighter composition; and a second liquid stream; (5) a third heat exchange device 'connected to the separation device to receive the first liquid stream and expand it to the intermediate pressure (6) a third expansion device 'which is connected to the separation device to receive the first liquid stream and expand it to the intermediate pressure; (7)-a steam pipe column' which is connected to receive the heating A second liquid stream and the expanded first liquid stream, and the distillate column system can divide the gas stream into a volatile distillation vapor; and a relatively less volatile portion containing the heavy hydrocarbon The main part of the substance; (8) a fourth heat exchange device which is connected to the distillation column to receive the volatile distilled vapor and cool it under a pressure sufficient to at least partially condense it to form a third liquid stream (9) The contacting and separating device may be further connected to the fourth heat exchange device to receive the Le Er liquid stream, so that at least a portion of the expanded first vapor gas stream in the contacting device and at least a portion of the third liquid (10) The first heat exchange device is connected to the contact and separation device to receive the volatile residual gas portion, wherein the first heat exchange device may connect the volatile residual gas portion. Page 126 580554 A3 BS C8 D3___ 6. Scope of patent application (please read the precautions of »first and then fill out this page) Cool under a pressure that can condense at least part of it 'to form the condensed airflow; and • (1 1 · ) Control device, which can adjust the halo and temperature of the feed gas flow to the contact and separation device and the distillation column to maintain the temperature of the contact and separation device and the steam column. From the temperature at which the relatively less volatile portion recovers a major portion of the heavy hydrocarbon. 5 7 · — An improved device for liquefying a natural gas stream containing methane and heavy hydrocarbons, the device comprising: (a) — or a plurality of first heat exchange devices, which are operatively connected to receive The natural gas stream is cooled under a pressure that can at least partially condense it to form a condensed gas stream; and (b) a first expansion device, which is connected to the first heat exchange device, to receive the Condensing the gas stream and expanding it to a low pressure to form the liquefied natural gas stream; '· The equipment improvements include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and Cooling under pressure; • (2) a second expansion device connected to the second heat exchange device to receive the cooled natural gas stream and expand it to a moderate pressure; National Standard (CNS) A4 Regulation (210X297 ^ Attack ----- 580554 A8 B3 C8 D3 2. Patent application Fanyuan (please fill in the precautions of “Reading Back” first) (3) Contact and separation device, which is connected to receive the expanded and cooled natural gas flow. The contact and separation device contains at least A contact device so that vapor and liquid can be mixed with each other, and includes a separation device to facilitate the vaporization of the vapor and liquid after mixing to form a first vapor flow and a first liquid flow; (4) Dierrhythm The exchange device is connected to the separation device to receive the first liquid stream and heat it; (5) a distillation tube 拄 which is connected to receive the heated first liquid stream, and the distillation tube column may be Dividing the gas stream into a volatile distillation vapor; and a relatively non-volatile portion, which is the main part containing the heavy hydrocarbon material; (6) a fourth heat exchange device, which is connected to the distillation Pipe to receive the volatile distilled vapor and cool it at a pressure sufficient to condense at least a portion of it; (7) a separation device connected to a fourth heat exchange device to receive the cooling The more volatile distilled vapor portion 'and divides it into a second vapor stream and a second liquid stream; (8) a distinguishing device connected to the separation device to receive the second liquid stream and It is divided into at least a first part and a second part, and the distinguishing device can be further connected to the distillation column to supply the first to the twelfth part of the second liquid stream. The paper size is in line with national standards (CNS). A4 specification C21〇X297 public love) 580554 A8Ba C8 D8 Application for profit-seeking scope Qier Jieying; & two two 11 Shao Fei. At first 1 £ · .ιβ- this steaming tube as a TS, τ It is fed from the top; the contacting and separating device f is connected to the first distinguishing device to receive the second liquid wave from the < 罘 two parts, so that at least a part of the expansion, cooling The natural gas stream is in close contact with the second part of at least-part of the second liquid stream in the contact device; (10) a merger device 'which is connected to the contact and separation device and the separation device to receive The first vapor stream and A second vapor stream and merge it into a volatile residual gas portion containing the methane and a lighter major portion; (1 1) the first heat exchange device is connected to the merged device to receive the volatile residue A gas part, wherein the first heat exchange device is capable of cooling the volatile residual gas part under a pressure capable of condensing at least a part of it to form the condensed gas stream; and (12) a control device, which can regulate the flow The amount and temperature of the contact and separation device and the feed gas flow of the distillation tube column to maintain the temperature above the contact and separation device and the distillation tube column can be recovered from the relatively less volatile portion The temperature of the major part of this heavy hydrocarbon. (9) (Please read "Notes on" Back "before filling out this page) • Order. 5 8. —A kind of liquefied natural gas containing methane and heavy hydrocarbons. The paper is in accordance with Chinese national standards ( CNS) A4 view (210 X 297 mm) 580554 A3 B3 C8 D3 6. Improved patent-applied equipment, which includes: (a) one or more first heat exchange devices, which are operable Connected (please read the notes of "« and then write this page) * to receive the natural gas stream and cool it under a pressure that can at least partially condense it to form a condensing stream; and (b ) A first expansion device, which is connected to the first heat exchange device to receive the condensed gas stream and expand it to a low pressure to form the liquefied natural gas flow; the improvements of the equipment include: (1) a Or a plurality of second heat exchange devices that are operatively connected to receive the natural gas stream and cool it at a pressure sufficient to cause a portion of it to condense; (2) a first separation device that is connected to the second Heat exchange device to receive the partially condensed days Gas flow and divide it into a first vapor flow and a first liquid flow; (3) a second expansion device connected to the first separation device * to receive the first vapor flow and expand it to A medium pressure; * · '(4) a contact and separation device connected to receive the expanded first vapor stream, the contact and separation device comprising at least one contact device so that vapor and liquid can be mixed with each other, and Contains a separation device to facilitate the separation of vapor and liquid after mixing to form a second vapor stream and a second liquid stream; Page 130 This paper: The dimensions are applicable to China National Standard (CNS) A4 specifications (2) 0 > <; 297 public service 580554 A8 B3 C8 D3 VI. Patent Application Fanyuan (5) The third heat exchange device is connected to the contact and separation device to receive the second liquid stream and heat it; (please read first (Please fill in this page again for the precautions) (6). A third expansion device connected to the separation device to receive the first liquid stream and expand it to the medium pressure; (7) a distillation Column It is connected to receive the heated second liquid stream and the expanded first liquid stream, and the distillation tube column system can divide the gas stream into a volatile distillation vapor; and a relatively less volatile portion (8) A fourth heat exchange device connected to the distillation column to receive the volatile distillation vapor and to condense at least a portion of it. (9) a second separation device, which is connected to a fourth heat exchange device to receive the cooled, more volatile, distilled 'vapor portion and divide it into a third vapor stream and a first Three-liquid washing, (1 0) a distinguishing device connected to the second separating device to receive the third liquid stream and distinguishing it into at least a first part and a second part, the distinguishing device It can be connected to the distillation column to supply the first part of the third liquid stream to the distillation column as its top feed; (1 1 ·) The contact and separation device can be connected to the second division device. To pick up The second part of the third liquid stream allows at least a portion of the expanded first vapor stream to flow in the contact device. Page 131 The paper size is in accordance with Chinese National Standard (CNS) A4 Regulation (210X297 mm) 580554 A3 B3 C3 D3 6. The scope of the patent application is in close contact with at least a part of the second part of the third liquid stream; (12) a merger device connected to the contact and separation device and the separation device to receive the first Two steam streams, and the third steam stream, and merge them into a volatile residual gas portion containing the methane and a lighter main component; (13) the first heat exchange device is connected to the combined device To receive the volatile residual gas portion, wherein the first heat exchange device can cool the volatile residual gas portion under a pressure that can condense at least a part of it to form the condensed gas stream; and (1 4 ) A control device capable of regulating the amount and temperature of the feed gas flow to the contact and separation device and the distillation column to maintain the contact and separation device and the distillation In the post-temperature side of the main part of a self temperature than the relatively non-volatile • recovering the heavy hydrocarbon portion of the substance. 59. An improved device for liquefying a natural gas stream containing methane and heavy hydrocarbons, the device comprising: (a)-or a plurality of first heat exchange devices which are operatively connected to receive the Natural gas flow, which is cooled at a pressure that can at least partially condense it, to form a condensed air flow; page 132 This paper is sized to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) Read back • Note on the above, please install it again. 3 Order 580554 VI. Patent Application Fanyuan and (b) p expansion device 'It is connected to the first heat exchange device to receive the condensed air stream and expand it to a low pressure to Forming the liquefied natural gas stream; improvements to the equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and cool it under pressure; (2) a second expansion A device connected to the second heat exchange device to receive the cooled natural gas stream and expand it to a moderate pressure; (3) a steam tube / column connected to receive the expansion, cooling Natural gas flow 'and the distillation column system can divide the gas flow into a volatile distillation vapor; and a relatively less volatile part, which is the main part containing the heavy hydrocarbon substance; (4) steam extraction Vapor withdrawing means, which is connected to the distillation column to receive a distillation vapor stream from a region of the distillation column below the expanded, cooled natural gas stream; (5) a third heat exchange device, It is connected to the vapor extraction device to receive the distilled vapor stream and is cooled under a pressure sufficient to make one of them. (6) a separation device connected to the third heat exchange device to receive The cooled distilled vapor stream is divided into pages on page 133. The paper is in accordance with Chinese National Standards (CNS) A4 regulations (210X297 mm) 580554 A3 BS C8 D3, a vapor stream and a liquid stream in the scope of the patent application (7) The distillation column may be further connected to the separation device to receive the liquid stream so that at least a portion of the expanded, cooled natural gas stream is tied to The distillate column is in close contact with at least a portion of the liquid stream; (8) a merging device connected to the distillation tube and the separation device to receive the volatile distillate vapor stream and the vapor stream, and Combine them into a volatile residual gas portion containing the methane and a lighter, major portion; (9) The first heat exchange device is connected to the combined device to receive the volatile residual gas portion, where the first A heat exchange device is capable of cooling a portion of the volatile residual gas under a pressure capable of condensing at least a part of it to form the condensed gas stream; and (10) a control device capable of regulating the flow to the distillation tube. The amount and temperature of the feed gas stream to maintain the distillation tube • The temperature above the temperature is at a temperature at which the major portion of the heavy hydrocarbons can be recovered from the relatively less volatile portion. 60 · An improved equipment capable of liquefying a natural gas stream containing methane and heavy hydrocarbons, the equipment comprising: (a) one or more first heat exchange devices which are operatively connected to receive This natural gas flow can be at least one of them on page 134. This paper size applies the Chinese National Standard (CN * S) A4 Regulations (210x297). (Please read the «Precautions» before writing this page. ) 580554 3383 ABCD patent application Fan Park Cooled under partially condensing pressure to form a condensing airflow; and i Read the precautions for I® before filling in this 3 (b) First expansion device, which is connected to the first A heat exchange device to receive the condensed gas stream and expand it to a low pressure to form the liquefied natural gas stream; improvements to the device include: (1) one or more second heat exchange devices that are operatively connected to Receive the natural gas stream and cool it under a pressure sufficient to partially condense it; (2) a first separation device connected to the second heat exchange device to receive the partially condensed natural gas stream and divide it into one A first vapor stream and a first liquid stream; (3) a second expansion device connected to the first separation device to receive the first vapor stream and expand it to a moderate pressure; (4) third An expansion device, which is connected to the first separation device to receive the first liquid stream and expand it to the intermediate pressure; connected to the first part 9 ¾ 轰 _31 Xiao Feihuicha: Shanghai equipment ( 5) a distillation column connected to receive the expanded first vapor stream and the expanded first liquid stream, and the distillation column may divide the gas stream into a volatile distillation steam / gas; and Relatively less volatile part, which is the main part containing the heavy hydrocarbon; (6) Vapor extraction device, which is connected to the distillation column, applies Chinese national standards on page 135 of this paper (CNS) A4 Regulations (210X 297 mm) 580554 3 Qi Qi cautiously discuss winI? WBr21 Shao Fei &??? In the split A3 BS C8 D3 Six, the scope of patent applications received from the expansion of the first A distillation vapor stream in the region of the distillation column below the vapor stream; (7) a third heat exchange device connected to the vapor extraction device to receive the distilled vapor stream and to sufficiently condense a portion of it. Cooling under pressure; (.8) a second separation device connected to the third heat exchange device to receive the cooled distilled vapor stream and divide it into a second vapor stream and a second liquid stream; ( 9) The distillation tube It can also be connected to the second separation device to receive the second liquid stream, so that at least a part of the expanded first steam-gas stream is in close contact with at least a part of the second liquid stream in the distillation column; ( 10) A merging device, which is connected to the distillation column and the second separation device to receive the volatile distillation vapor stream and the second vapor stream, and merge them into one containing the formazan · and lighter composition The main part of the volatile residual gas • part; (11) the first heat exchange device is connected to the combined device to receive the volatile residual gas part, wherein the first heat exchange device is capable of volatile Part of the residual gas is cooled under a pressure that can condense at least a part of it to form the condensing gas stream; and (12) a control device that can regulate the amount of the feed gas flow to the distillation column and Temperature to maintain the distillation column on page 136 of this paper! I: Applicable size: Chinese National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back before filling this page) 580554 A3 B3 C8 D3 The temperature above the scope of patent application is at a temperature that can recover the main part of the heavy hydrocarbon from the phase, which is less volatile. 0 & f Please read and read the note of φ «Rewrite this page» 61 ·-An improved equipment for liquefying a natural η stream composed of methane and heavy hydrocarbons, the equipment comprising: pores ⑷-or a variety of first heat exchange devices, which can be Connected in an operational manner to receive the natural gas stream, and cooled at a pressure that at least partially condenses it, to form a condensed gas stream; and (b) a first expansion device connected to the first A heat exchange device to receive the condensed airflow and expand it to a low pressure to form the liquefied natural airless airflow; improvements to the device include: (1) one or more second heat exchange devices that are operatively connected To receive the natural gas stream and cool it under pressure; (2) a second expansion device connected to the second heat exchange device to receive the cooled natural gas stream and expand it to a moderate pressure; (3)-distillation Column Is connected to receive the expanded, cooled natural gas stream, and the distillation column system can divide the stream into a volatile vapor; and a relatively less volatile portion that contains the heavy hydrocarbons The main part of the substance; page 137 This paper size applies to China National Standard (CNS) A4 (210X297 mm) 580554 (4) a steam extraction device connected to the distillation column to receive a distillation vapor stream from a region of the distillation column below the expanded, cooled natural gas stream; (5) a third heat exchange device, It is connected to the vapor. An extraction device is provided to receive the distilled vapor stream and cooled at a pressure sufficient to cause a part of it to condense; (6) a separation device is connected to the third heat exchange device to receive the cooling Distilling the vapor stream and dividing it into a vapor stream and a liquid stream; (7) a distinguishing device connected to the separating device to receive the liquid stream, and distinguishing it into at least a first part; and a first In two parts, the separation device can be further connected to the distillation column to supply the first part of the liquid stream to the distillation tube column as its top feed; (8) the distillation tube column can be further connected to the separation device to Receiving a second portion of the liquid stream such that at least a portion of the expanded, cooled natural gas stream is in close contact with at least a portion of the second portion of the liquid stream in the distillation column; (9) Merging device, which is connected to the distillation column and the separation device to receive the volatile distillation vapor stream and the vapor stream, and merge them into a main part containing the methane and a lighter component Volatile residual gas portion; (10) The first heat exchange device is connected to the combined device to receive the volatile residual gas portion, wherein the first heat transfer page 138 applies the national standard (CNS) of this paper A4 specification (210 X 297 public love) (Please read it first. Please read the «Precautions before filling out this page}. Order ·% · 580554 A3 BS C3 D3 VI. Apply for a patent garden (please read the back first * ®) (Please fill in this page again) The replacement device can cool the part of the volatile residual gas under a pressure that can condense at least a part of it to form the condensing gas stream; and (11) a control device that can regulate the flow to the The amount and temperature of the feed gas stream in the distillation column to maintain the distillation column. The temperature above is at a temperature at which a major portion of the heavy hydrocarbon material can be recovered from the relatively less volatile portion. -Kind of Improved equipment for the conversion of natural gas streams containing methane and heavy hydrocarbons ^ The equipment includes: (a)-or a plurality of first heat exchange devices, which are operatively connected to receive the natural gas stream, and at least One part of it can be cooled under condensing pressure to form a condensed gas stream; and (b) a first expansion device connected to the first heat exchange device to receive the condensed gas stream and expand it to a low pressure to form The liquefied natural gas stream; %% improvement of the equipment includes: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and to make one of them . Cooling under sub-condensing Lili; (2) a first separation device connected to the second heat exchange device to receive the partially condensed natural gas flow, and adapting the paper size on page 139 to Chinese national standards (CNS) A4 specification (210 X 297 mm) 580554 A3 BS C8 D3 6. Applying for a dry profit garden will be divided into a first vapor stream and a first liquid stream; (Please fill in this page again)) (3). A second expansion device connected to the first separation device to receive the first vapor stream and expand it to a moderate pressure; (4) a third expansion device, which Connected to the first separation device to receive the first liquid stream and expand it to the intermediate pressure; (5) a distillation column connected to receive the expanded first vapor stream and the expanded first A liquid stream, and the distillation tube column system can divide the gas stream into a volatile distillation vapor; and a relatively less volatile part, which is the main part containing the heavy hydrocarbon substance; (6) vapor extraction A deionization device connected to the distillation column to receive a distillation vapor stream from a region of the distillation tube column below the expanded first vapor stream; '(7) a third heat exchange device connected to the vapor An extraction device to receive the distilled vapor stream and cool it under a pressure sufficient to make one of them *. Partially condensed; (8) a second separation device connected to the third heat exchange device to receive the cooled distillation Vapor And divide it into a second vapor stream and a second liquid stream; (9) a distinguishing device connected to the second separating device to receive the second liquid stream and distinguishing it into at least one first Page 140 This paper is suitable for Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 A3 BS C8 D3 6. Scope of patent application (please fill in this page with the precautions of «Back · · *) section and A second part, the separation device can be further connected to the distillation column to supply the first part of the second liquid stream * · divided into the distillation column as its top feed, the position of the feed point is different from the The location where the distilled vapor is evacuated is almost the same; (.10) The distillation column can be further connected to a distinguishing device to receive the second part of the second liquid stream, so that at least a part of the expanded first vapor stream can be In the distillation column in close contact with at least a part of the second part of the second 'liquid stream, (11) a combined device, which is connected to the distillation column and the separation device to Receiving the volatile steam vapor stream and the The second vapor stream, and merge it into a volatile residual gas portion containing the main part of the formazan and lighter composition; (1 2) the first heat exchange device is connected to the combined device to receive The volatile residual gas portion, wherein the first heat exchange device can cool the volatile residual gas portion under a pressure that can condense at least a portion of the volatile residual gas to form the condensed gas stream; and (1 3) a control device It can regulate the amount and temperature of the feed gas flow to the distillation tube to maintain the temperature above the column of the distillation tube. The heavy hydrocarbon can be recovered from the relatively less volatile part. The main part of the temperature page 141 This paper is suitable for Chinese National Standard (CNS) A4 size (210X297 mm) 580554 A3 BS C8 D3 It is Shanghai Class 63. — An improved equipment that can liquefy a stream consisting of methane and heavy hydrocarbons, the equipment includes: (a) — or a plurality of first heat exchange devices, which are connected in series • to receive the gas Air flow, and cooled at a pressure of at least a ^ to make a part of it condensed to form -A, iron flow; and a first expansion device connected to the first heat exchange device to receive the condensed air flow And expand it to a low pressure to form a liquefied natural gas stream; improvements to this equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and cool it under pressure However; (2) a second expansion device, which is connected to the second heat exchange device to receive the cooled natural gas stream and expand it to a moderate pressure; (3)-a steam distillation column, which is connected to Receive the expanded, cooled natural gas stream 'and the steam pipe system can divide the stream into a volatile distillate vapor; and a relatively less volatile portion that contains the heavy hydrocarbon. The main part; (4) a steam extraction device connected to the distillation column to receive natural gas from below the expanded, cooled natural gas stream (b) page 142 This paper is in accordance with the Chinese national standard Standard (CNS) A4 Regulations (2) 0 > < 297 mm) {Please read the back · »before you write this page} Order · Line-580554 A3 B8 C8 D3 77, Patent scope distillation tube A vapor stream of distilled vapor in the column area; (5) a third heat exchange device connected to the vapor extraction device (please read the precautions of “Read Back-« before filling in this page) • • set to receive the distillation The vapor stream is cooled at a pressure sufficient to cause a part of it to condense; (6) a separation device connected to the third heat exchange device to receive the cooled distilled vapor stream and divide it into a vapor stream and A liquid stream; (7) the distillation column can be further connected to a separation device to receive the liquid stream, so that at least a portion of the expanded, cooled natural gas stream can be used in the distillation column with at least a portion of the liquid The streams are in close contact; (8) a liquid withdrawing means connected to the distillation column to receive a stream of bismuth strips from a region of the distillation column above the vapor extraction device; ( 9) Fourth An exchange device connected to the liquid extraction device to receive the distilled liquid stream and heat it, and the fourth heat exchange device can be connected to the distillation column for the liquid that should be heated Flow to the distillation column, the position where it enters the column is lower than the position of the vapor extraction device; (10) the merger device, which is connected to the distillation column and the separation device to receive the volatility Distill the vapor stream and the vapor stream and combine them into one containing the methane and lighter. Page 143 This paper applies the national standard (CNS) A4 regulations (210 X 297 public love) 580554 A3 B3 C8 D3 Six 2. The volatile residual gas part of the main part of the patent application park; (11) The first heat exchange device is connected to the combined device to connect {please read the precautions before reading this page before filling in this page} •. The volatile residual gas portion is collected, wherein the first heat exchange device can cool the volatile residual gas portion under a pressure that can condense at least a portion of it to form the condensing gas stream; and (12) control Device capable of regulating the amount and temperature of the feed gas flow to the distillation tube to maintain the temperature above the column of the distillation tube to recover the heavy hydrocarbons from the relatively less volatile portion The main part of the temperature. · 64. — An improved device capable of liquefying a natural gas stream containing methane and heavy hydrocarbons, the device comprising: (a) one or more first heat exchange devices that are operatively connected to receive the A natural gas stream, and cooled at a pressure at least one of which can be partially condensed to form a condensed gas stream; and *. · (B) a first expansion device connected to the first heat exchange device to receive The condensed gas stream is expanded to a low pressure to form the liquefied natural gas stream. Improvements to the equipment include: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and can Make one of the pages 144 of this paper suitable for Chinese National Standard (CNS) A4 specifications (210X297 mm) 580554 A8 B3 C8 D8 6. Apply for patent range Cooling under condensing pressure; (2) First separation device , Which is connected to the second heat exchange device (please note the M1ΪΪBack® before filling out this page). • Set to receive the partially condensed natural gas stream and divide it into a first steam Air flow and a first liquid flow, (3) a second expansion device, which is connected to the first separation device to receive the first vapor flow and expand it to a moderate pressure; (4) a third expansion device Connected to the first separation device to receive the first liquid stream and expand it to the intermediate pressure; (5) a distillation column connected to receive the expanded first vapor stream and the expansion The first liquid stream, and the distillation column system can divide the gas stream into a volatile hall vapor; and a relatively less volatile part, which is the main part containing the heavy hydrocarbon material; • (6 ) A steam extraction device connected to the distillation column to receive distillation from the expanded first vapor stream *. A distillation vapor stream in the region of the column; (7) a third heat exchange device, which is Connected to the vapor extraction device to receive the distilled vapor stream and cooled at a pressure sufficient to make one of them partially condensed; (8) a second separation device connected to the third heat exchange device to receive the Of cooling Distill the vapor stream, and apply the Chinese paper standard (CNS) A4 (210X297) on page 145 of this paper. 580554 A3 B8 C8 D3. 6. The patent application park is divided into a second vapor stream and a second liquid stream. (9) The distillation column can be connected to the separation device to receive the first reading and reading. • Notes on the side before filling out this page. • • The second liquid stream, so that at least a part of the expanded first vapor A gas stream can be in close contact with at least a portion of the second liquid stream in the distillation tube column; (10) a liquid withdrawing means connected to the distillation tube column to receive the vapor extraction A distilled liquid stream in the region of the distillation column above the device; (11) a fourth heat exchange device connected to the liquid extraction device to receive and heat the distilled liquid stream, the fourth heat exchange The device may be further connected to the distillation column to supply the heated liquid to the distillation column, and the position where it enters the column is lower than the position of the vapor extraction device; ( 1 2) A combined device, which is connected to the distillation column and the separation device to receive the volatile distilled vapor stream and the second vapor stream, and merge them into a lighter composition containing the methane and The main part of the volatile residual gas part; (13) the first heat exchange device is connected to the combined device for receiving, • the volatile residual gas part is received, wherein the first heat exchange device is capable of storing the volatile residual gas The gas portion is cooled under a pressure that can condense at least a portion of it to form the paper size on page 146 which is applicable to the Chinese National Standard (CNS) A4 specification (210X297 public love) 580554 B3 C8 D3 6. Condensed airflow in the scope of patent application; and (14) Control device, which can regulate the amount and temperature of the feed gas flow to the distillation column to maintain the temperature above the distillation column in a relatively non-volatile part The temperature for recovering the main part of the heavy hydrocarbon material 65. — An improved equipment that can liquefy a natural gas stream containing methane and heavy hydrocarbon materials, the equipment includes: (a) -One or more first heat exchange devices which are operatively connected to receive the natural gas stream and are cooled at a pressure at least partially condensable to form a condensed gas stream; and (b) a first expansion device It is connected to the first heat exchange device to receive the condensed gas stream and expand it to a low pressure to form the liquefied natural gas stream. Improvements to the equipment include: (1) one or more second heat exchange devices, It is operatively • connected to receive the natural gas stream and cooled under pressure; (2) a second expansion device connected to the second heat exchange unit to receive the cooled natural gas stream and expand it to • • A medium pressure; (3) A distillation column connected to receive the expanded, cooled natural gas stream, and the distillation column can be used to page the air stream Page 147 This paper is in accordance with Chinese National Standards (CNS) A4 specifications (2Ι〇χ297 public attack) < Please read the precautions of «Then, please fill in this page first） Pack: ·: · ---- Order ... 0888 SCD 580554 6. Please read the scope of the patent application first. [«Notes before filling out this page and divide it into a volatile steam steam; and a relatively less volatile part, which contains the heavy hydrocarbon • the main part of the quality; (4) a steam extraction device connected to the distillation pipe 拄 to receive a stream of distilled steam from the area of the distillation tube column below the expanded, cooled natural gas stream; (5) section A three heat exchange device connected to the steam extraction device to receive the distilled vapor stream and cooled under a pressure sufficient to make a part of it condensate; (6) a difficulty separation device connected to the third heat exchange device A device for receiving the cooled distilled vapor stream and dividing it into a vapor stream and a liquid stream; (7) a distinguishing device connected to the separating device to receive the liquid stream and distinguishing it into at least one first One part and one second part, the separation device can be further connected to the distillation column to supply the first part of the liquid stream into the distillation column as its feed. The position of the feed point is almost the same as the position where the distilled vapor is pumped out; (8) The distillation column can be connected to the separation device to receive the second part of the liquid stream and expand at least a part of the expansion. The cooled natural gas stream can be in close contact with at least a portion of the second portion of the liquid stream in the distillation column; (9) a liquid extraction device connected to the distillation column; Paper size is in accordance with Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 BS C8 D8 6. Patent application scope Receive a kind of steaming liquid flow from the distillation column area above the vapor extraction device; (please first Read the back- * notes before filling out this page) • (10) The fourth heat exchange device is connected to the liquid extraction device to receive the distilled liquid stream and heat it. The fourth heat exchange device It can also be connected to the distillation column for • the heated liquid should flow into the distillation column, the position where it enters the column is lower than the position of the vapor extraction device;-(11) the combined device, which System connection To the distillation tube and the separation device to receive the volatile distilled vapor stream and the vapor stream · and merge them into a volatile residual gas portion containing the main part of the f-alkane and a lighter composition; (12 ) The first heat exchange device is connected to the combining device to receive the volatile residual gas portion, wherein the first heat exchange device can cool the volatile residual gas portion under a pressure that can condense at least a portion of it, To form the • condensed gas stream; and (13) a control device that regulates the amount and temperature of the * · 'feed gas flow to the steaming crane column to maintain the temperature above the distillation column at a constant temperature The temperature at which the major portion of the heavy hydrocarbon can be recovered from the relatively less volatile portion. 66. — A liquefied natural gas containing methane and heavy hydrocarbons Page 149 This paper is suitable for Chinese National Standard (CNS) A4 Regulations (210 X 297 mm) 6. Improvements in the flow of patent applications Equipment comprising: (a) one or more first heat exchange devices operatively connected to receive the natural gas stream and cooled at a pressure at least partially condensable to form a condensed gas &Amp; (b) a first expansion device, which is connected to the first heat exchange device to receive the condensed gas stream and expand it to a low pressure to form a liquefied natural gas stream; an improvement of the device It includes: (1) one or more second heat exchange devices that are operatively connected to receive the natural gas stream and cooled under a pressure that can partially condense it; (2) a first separation device that is Connected to the second heat exchange device to receive the partially condensed natural gas flow and divide it into a first vapor flow and a first liquid flow; (3) a second expansion device connected to the first separation device To receive the first vapor stream and expand it to a medium pressure; (4) a third expansion device connected to the first separation unit to receive the first liquid stream and expand it to the medium pressure (5) a distillation tube, which is connected to receive the expanded first vapor gas> and the first liquid stream, and the distillation tube column system can divide the gas stream into a volatile distillation vapor; and First page 150 This paper is suitable for Chinese National Standard (CNS) A4 specification (210X297 public love) 580554 B3 C3 D3 VI. The relatively non-volatile part of the patent application park, which contains the heavy carbon argon The main part of the substance; (please read the notes of «Please fill in this page first} * (6) The steam extraction device is connected to the distillation column to receive the vapor from the expansion steam A distillation vapor stream in the region of the distillation column; (7) a third heat exchange device connected to the vapor extraction device to receive the distillation vapor stream and cool it under a pressure sufficient to condense a portion of it; 8) Second point A device connected to the third heat exchange device to receive the cooled distillate gas stream and divide it into a second vapor stream and a second liquid stream; (9) a distinguishing device, which is Connected to the separation device to receive the second liquid stream and divide it into at least a first part and a second part, the separation device may be further connected to the distillation tube to supply the first part of the second liquid stream To the distillation column as its feed, the location of the feed point is almost the same as the location where the distillation vapor is pumped away; (10) the distillation column can be connected to the division device to receive, · The second part of the two liquid streams, so that at least a part of the expanded first vapor stream can be tightly contacted in the distillation column with at least a part of the second part of the second liquid stream; ( 11) A liquid extraction device connected to the distillation column to receive the distillation column area above the vapor extraction device. Page 151 This paper is compliant with Chinese National Standard (CNS) A4 Regulations (210X297). Centimeters) 580 554 B8 C8 D3 A patented liquid stream in the scope of patent application; please read the [• Notes on the front side and then fill out this page (12) The fourth heat exchange device is connected to the liquid extraction device. Device to receive the distillation The liquid stream and heat it, the fourth heat exchange device can be connected to the distillation column to supply the heated liquid stream into the distillation column, its position is lower than the steam extraction Location of the device; (13) a merging device, which is connected to the distillation column and the second separation device to receive the volatile distillation vapor stream and the second vapor stream and merge them into an inclusion The volatile residual gas portion of the main portion of the pinane and the lighter composition; (14) the first heat exchange device is connected to the combining device to receive the volatile residual gas portion, wherein the first heat exchange device is a Cooling the volatile residual gas under a pressure capable of condensing at least a part of it to form the condensed gas stream; and (15) a control device which can regulate the flow to the distillation column The amount and temperature of the feed gas stream to maintain the temperature above the distillation column at a temperature at which the major portion of the heavy hydrocarbon material can be recovered from the relatively less volatile portion is below 0 67. — 种 可Liquefied natural gas containing methane and heavy hydrocarbons Page 152 This paper is suitable for Chinese National Standard (CNS) A4 (210X297) 580554 CBCD VI. Improved equipment for patent application stream, the equipment includes: (a) one or more first heat exchanging devices, which are known as the ground floor; • to receive the natural gas stream, and Cooling at a pressure of at least / a part of it to condense to form a sulfone condensate gas stream; and (b) a first expansion device connected to the first heat exchange device to receive and expand the condensed gas stream To low pressure to form the liquefied natural gas stream; improvements to the equipment include: (1) one or more first heat exchange devices, which are operatively connected to receive the natural gas stream and cool it under pressure; (2) A second expansion device connected to the second heat exchange unit to receive the cooled natural gas stream and expand it to a medium pressure; (3) a distillation column connected to receive the expansion, cooling Natural gas flow, and the distillation column system can divide the gas flow into a volatile residual gas part, which contains the main part of the methane and a lighter composition; and a relatively less volatile The first heat exchange device is connected to the distillation column to receive the volatile residual gas portion, wherein the first heat exchange device is The volatile residual gas part can be page 153. The paper is compliant with Chinese National Standards (CNS) A4 regulations (2ιο > < 297 & |) 580554 B3 C3 D3 6. The scope of the patent application is to condense at least a part of it Cooling under pressure to form the condensed gas stream; and (5) a control device that can regulate the amount and temperature of the feed gas flow to the distillation column to maintain the temperature above the distillation column At a temperature at which the main part of the heavy carbon argon substance can be recovered from the relatively less volatile part. 6 8.-An improved device capable of liquefying a natural gas stream containing methane and heavy hydrocarbon materials, the device is Containing:. (A) one or more first heat exchange devices operatively connected to receive the natural gas stream and cooled under a pressure that can condense at least a portion of it to form a condensation Stream; and (b) a first expansion device connected to the first heat exchange device to receive the condensed gas stream and expand it to a low pressure to form the liquefied natural gas stream; improvements to the apparatus include: (1) One or more second heat exchange devices that are operatively connected to receive the natural gas stream and cooled under a pressure that may condense a portion of them; (2) a separation device that is connected to the second heat exchange device Device to receive the partially condensed natural gas stream and divide it into a vapor stream and a liquid stream; page 154 This paper is in accordance with Chinese National Standards (CNS) A4 Regulations (210X297 mm) .Notes on the surface: I will install 3 bezels 580554 B8 C8 D3 VI. Patent application scope (3) The second expansion device is connected to the separation device to receive the vapor stream and expand it to a moderate pressure; η Read the precautions on the back side before filling in (4) the third expansion device, which is connected to the separation unit to receive the liquid stream and expand it to the medium pressure (5) a distillation column connected to receive the expanded vapor stream and the expanded liquid stream, and the distillation column can divide the gas stream into a volatile residual gas portion, which contains the methane And a lighter main part; and a relatively less volatile part, which is a main part containing the heavy hydrocarbon substance; (6) the first heat exchange device is connected to the distillation column to Receiving the volatile residual gas portion, wherein the first heat exchange device is capable of cooling the volatile residual gas portion under a pressure capable of condensing at least a portion thereof to form the condensed gas stream; and (7) a control device, It is capable of regulating the amount and temperature of the feed gas flow to the distillation column to maintain the temperature above the distillation column in a major way to recover the heavy hydrocarbons from the relatively less volatile portion Part of the temperature. 69. The improved device according to any one of claims 43, 44, 45, 67, or 68 in the scope of patent application, wherein the device includes: (1) a compression device connected to the distillation column to receive the volatility Page 155 This paper is in accordance with Chinese National Standard (CNS) A4 specification (210X297 public love) 580554 B8 C8 D3 Patent application scope of the residual gas portion and compress it; i read the precautions of I® before filling This page (2) The first heat exchange device is connected to the first heat exchange device to receive the compressed volatile residual gas portion, wherein the first heat exchange device can select the compressed gas. The part of the residual gas is cooled at a pressure • that at least partially condenses it to form the condensed gas stream. 70. The improved device according to item 41 of the scope of patent application, wherein the device comprises: (1) a compression device connected to the distillation. Column to receive the volatile residual gas portion and compress it ; (2) the first heat exchange device is connected to the compression device to receive the compressed volatile residual gas portion, wherein the first heat exchange device can make the compressed volatile residual gas portion at least One of them is cooled under condensing pressure; and (3) the distinguishing device is connected to the first heat exchanging device to receive the condensing portion and divide it into at least two parts to form the condensing gas stream and the liquid stream, The separation device can be further connected to the distillation column to direct the liquid to the distillation column as its top feed. 71. The improved equipment as described in item 42 of the scope of patent application, wherein the equipment includes: page 156 The paper size applies the Chinese National Standard (CNS) A4 specification (210X297), 580554 B3 ca D3 patent scope (1 ) Compression device, which is connected to the distillation column to receive the volatile residual gas and compress it; please read the precautions on the η back and then fill out this page • (2) • the first heat exchange device Is connected to the compression device to receive the compressed volatile residual gas portion, wherein the first heat exchanging device is to compress the compressed volatile residual gas portion to a pressure at least a portion of which can be condensed Cooling; and (3) the division device is connected to the first heat exchanging device to receive the condensing part and divide it into at least two parts to form the condensed gas stream and the liquid stream, and the zone and sub-device can be more Connected to the distillation column to direct the liquid to the distillation column as its top feed. 72. The improved equipment according to item 46 of the scope of patent application, wherein the equipment includes: (2) (1) a compression device connected to the distillation column to receive the volatile residual gas portion, and Its compression; the first heat exchange device is connected to the compression device to receive the compressed volatile residual gas portion, wherein the first heat exchange device can make the compressed volatile residual gas portion at least One part is cooled under condensing pressure; and (3) the distinguishing device is connected to the first heat exchanging device to receive the condensing part and distinguish it into at least two parts, page 157, paper size is suitable for China country #quasi (CNS) A4 specification (210X297) 580554 B8 C3 D3 6. Scope of patent application (please read and read the notes of «Then write this page on the field) Dividing * forming the condensed air flow and the liquid flow 'the distinguishing device It can also be connected to the distillation tube column to direct the liquid * to the distillation tube 拄 as its top feed. 73. The improved equipment according to any one of claims 47 or 48 in the scope of the patent application, wherein the equipment includes: (1) a compression device connected to the distillation column to receive the volatile residual gas portion, And compress it; (2) the first heat exchange device is connected to the compression device to receive the compressed volatile residual gas and the remaining gas portion, wherein the first heat exchange device can compress the The volatile residual gas portion is cooled under a pressure that can condense at least a portion of it; and (3) the second division device is connected to the first heat exchange device to receive the condensation portion and divide it into • There are two less parts to form the condensed gas stream and the second liquid stream. The second distinguishing device can be further connected to the distillation column to direct the liquid flow to the distillation column as the top feed of *. 74. The improved equipment as described in item 49 of the scope of the patent application, wherein the equipment includes: (1) a compression device connected to the distillation column to receive the volatile residual gas portion and compress it ; Page 158 This paper is in compliance with National Standards (CNS) A4 regulations (210X297 public love) 580554 B8 C8 D3 VI. Scope of patent application (please read the note of Φ-Φ before filling this page) ( 2) The combination device is connected to the separation device to receive the compressed vapor stream and the compressed relatively volatile * vapor stream, and combine them to form the volatile residual gas portion, which contains the The main part of the lighter and lighter composition. 75. The improved equipment according to item 50 of the scope of patent application, wherein the equipment comprises: (1) a compression device connected to the distillation column to receive the volatile residual gas portion and compress it; ( 2) The merging device is connected to the second separation device and the compression device to receive the second vapor stream and the compressed more volatile distilled vapor stream, and combine them to form a volatile residue The gas part is the main part containing the formazan and lighter composition. 76. The improved device according to any one of claims 51, 52, 55, or 56 in the scope of patent application, wherein the device includes: * · '(1) a compression device connected to the contact and separation device To receive the volatile residual gas portion and compress it; (2) the first heat exchange device is connected to the compression device to receive the compressed volatile residual gas portion, wherein the first heat exchange device is The compressed and volatilized page 159 of this paper is in accordance with the national standard (CNS) A4 specification (210X297 mm) 580554 BS C8 D3 patent application. ^ The gas part is cooled under a pressure that is small enough to make one part of it condensate To form the condensed airflow. 77_ The improved equipment as described in any one of 53, 53, 57, 58, 58, 59, 6061, 62, 63, 64, 65 or 66 of the scope of patent application, wherein the equipment includes: (1) a compression device It is connected to the combined device to receive the volatile residual gas portion and compress it; (2) The first heat exchange unit is connected to the compression device to receive the compressed volatile residual gas. The remaining gas portion, wherein the first heat exchange device can cool the compressed volatile residual gas portion under a pressure that can cause a portion of it to condense to form the condensed gas stream. (Please read the precautions for *** before filling out this page) Qi lr% £ h% t L · P 'll 78 · If any of the patent application scopes 43, 44, 45, 67 or 68 The improved equipment described above, wherein the equipment includes: (1) a heating device connected to the distillation column to receive the volatile residual gas portion and heat it; a compression device connected to the heating The first heat exchange device is connected to the compression device to receive the compressed and heated volatile residual gas portion, wherein the first A heat exchange device can cool the pressure at page 160 (2) (3) 580554. 6. The volatile residual gas with a reduced scope of the patent application is cooled at a pressure that can at least partially condense it to form the condensation. 79 The improved equipment according to the scope of application patent No. 41, wherein the equipment includes: ： Heating device, # 系 连 # to the steaming hall pipe column to receive the volatile residual gas portion and heat it; (2) compression Device connected to the heating device to Receive the heated volatile residual gas portion and compress it; (3) the first heat exchange device is connected to the compression device to receive the compressed and heated volatile residual gas portion, wherein the first heat The exchange device can cool the compressed volatile residual gas at a pressure that can condense at least a part of it to form the condensed airflow; and printed by (X) the consumer property cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (4) the division device system Connected to the condensing section and distinguishing it from the condensed gas stream and the liquid stream, the steaming crane tube is guided to feed the top of the liquid. A heat exchange device to receive the at least two parts, forming the cold separation device can be further connected to the flow to the distillation column as 80. The improved device according to item 42 of the patent application scope, wherein The equipment includes: (1) a heating device, which is connected to the distillation column to receive the volatility. Page 161 The paper size is applicable to the Chinese National Standard (CNS) A4 Regulation (210X297 mm) ABCD 580554 6. Apply for a patent Scope the residual gas portion and heat it; (2) a compression device connected to the heating device to receive the heated * volatile residual gas portion and compress it; (3) the first heat exchange The device is connected to the compression device to receive the compressed and heated volatile residual gas portion, wherein the first heat exchange device is capable of condensing the compressed volatile residual gas portion to at least a portion thereof. Cooling under pressure; and (4) the distinguishing device is connected to the first heat exchanging device to receive the condensing part and divide it into at least two parts to form the condensing airflow and the narrative The separation device can be further connected to the distillation column to direct the liquid to the distillation column as its top feed. ^ 81. The improved equipment according to item 46 of the scope of patent application, wherein the equipment comprises: (1) a heating device connected to the distillation column to receive the volatile residual gas portion and heat it; ( 2) a compression device connected to the heating device to receive the heated volatile residual gas portion and compress it; (3) the first heat exchange device connected to the compression device to receive the compression And the heated volatile residual gas portion, wherein the first heat exchange device can cool the compressed volatile residual gas portion under a pressure that can at least partially condense it; _. Page 162 _ paper size Applicable to China National Standard (CNS) A4 Regulations (210X297 mm) (Please read the precautions on the back before filling out this page)-Order · Line_ M * Printed by the Ministry of Economic Affairs Intellectual Property Bureau Employee Consumption Cooperative 580554 A8 B8 C8 D8 Scope of patent application and (please read the precautions on the back before filling out this page) (4), the second distinguishing device is connected to the first heat exchange device to receive the condensing part and distinguish it into There are two less parts to form the condensed gas stream and the liquid stream, and the second distinguishing device can be connected to the distillation column to direct the liquid flow to the distillation column as a true top feed. 82. If applied The improved equipment according to any one of the 47th or 48th of the patent scope, wherein the equipment comprises: (1) a heating device connected to the distillation column to receive and heat the volatile residual gas; (2) a compression device connected to the heating device to receive the heated volatile residual gas portion and compressing it; (3) the first heat exchange device connected to the compression device to receive the compression And the heated volatile residual gas portion, wherein the first heat exchange device can cool the compressed volatile residual gas portion under a pressure that can at least partially condense it; and the Intellectual Property Bureau of the Ministry of Economic Affairs Print (4) The second differentiation device is connected to the first heat exchange device to receive the condensed portion 'and divide it into at least two points' to form the condensed airflow and the liquid The second distinguishing device can be further connected to the distillation column to guide the liquid flow to the distillation column as the top feed. Page 163 This paper standard is applicable to the National Standard (CNS) A4. (210X297mm) ABCD 580554 VI. Application for Patent Scope 83. The improved equipment described in item 49 of the scope of patent application, among which you include · (Please read the precautions on the back before filling this page) • (1) A heating device connected to the distillation column to receive the more volatile distilled vapor droplets and heating it; (2) a compression device connected to the heating device to receive the heated relatively A volatile distilled vapor stream and compresses it; (3) a cooling device connected to the compression device which has received the compressed and heated relatively volatile distilled vapor and cooled it; (4) the The merging device is connected to the separation device and the cooling device to receive the vapor stream and the cooled and compressed relatively volatile distilled vapor stream, and merge them to form a volatile residual gas portion. The methane-containing composition and a main part of the lighter. 84. The improved equipment as described in item 50 of the scope of patent application, wherein the equipment includes: (1) a heating device connected to the distillation tube to receive printing by the Intellectual Property Bureau of the Ministry of Economic Affairs X Consumer Cooperative '' A volatile distilled vapor stream and heats it; (2) a compression device connected to the heating device to receive the heated, more volatile distilled vapor stream and compress it; • (3) cooling Device, which is connected to the compression device that has received the compressed and heated relatively volatile distilled vapor and cooled it; _I page 164_ This paper size applies to China National Standard (CNS) A4 (210 X (297 mm) 580554 B8 C8 D8 Printed by the Ministry of Economic Affairs Intellectual Property Bureau X Consumer Cooperative, patent application scope (4) The combined device is connected to the second separation device and the cooling device to receive the second vapor The gas stream and the cooled, compressed, more volatile, distilled vapor stream are combined to form a volatile residual gas portion, which contains the methane and a lighter composition main part. 85. The improved device according to any one of the claims 51, 52, 55, or 56 in the patent application scope, wherein the device includes: ^ ⑴Heating device connected to the contact and separation device to receive the volatility Residual gas portion and heating it; ⑺ a compression device connected to the heating device to receive the heated volatile residual gas portion and compress it; ⑺ the first heat exchange device is connected to the compression device to Receiving the compressed and heated part of the volatile residual gas, wherein the first heat exchange device is capable of cooling the compressed and heated volatilized residual gas part at a pressure at least capable of causing it to partially condense to A condensing air flow is formed. 86. The improved equipment according to any one of 53, 53, 57, 58, 58, 59, 60, 61, 62, 63, 64, 65, or 66 of the scope of patent application, wherein the equipment includes: (1) heating device , Which is connected to the combined device to receive the volatile residual gas portion and heat it; (2) compression device, which is connected to the heating device to receive the added page 165 of this paper, the Chinese standard applies ( CNS) A4 specification (210X297). ------- !: '::::, order ........- line (please read the precautions on the back before filling this page) 580554 8 8 88 ABCD patent application scope (please read the notes on the back before filling this page) hot volatile residual gas part and compress it; and (3) the first heat exchange device is connected to the compression device To receive * the compressed and heated volatile residual gas portion, wherein the first heat exchange device is capable of .... the compressed and heated volatile residual gas portion is at a pressure that can condense at least a portion thereof Under cooling to form a condensing airflow. 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, The improved device according to any one of 67, 68, 70, 71, 72, 74, 75, 79, 80, 81, · 83 or 84, wherein the volatile residual gas stream part contains the methane, a lighter composition, And C2. 88. If the scope of patent application is 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 58, 59, 60, 61 '62, 63, 64, 65, 66, 67, 68, 70, 71, 72, 74' 75, 79, 80, 81, 83 or 84 · Member of the Ministry of Economics, Intellectual Property Bureau, X Consumer Cooperative, where the volatile residual gas stream is the main part containing the pinane, lighter composition, C2 composition, and C3 composition. 89. Improvement as described in item 29 of the scope of patent application Method, in which the volatile residual gas stream part contains the main part of the methane, lighter composition, and C2 composition. Page 166 This paper size applies to China National Standard (CNS) A4 specification (210X297) (%) 580554 A8 B8 C8 D8 6. Scope of patent application (please read the precautions on the back before filling out this page) 90. The improvement method described in item 30 of the scope of patent application, where the volatile residual airflow part is Contains the major part of this methane, lighter composition, and C2 composition. 9 1 · The improved method according to item 31 of the scope of the patent application, wherein the volatile residual gas stream portion comprises the main part of the methane, lighter composition, and · C 2 composition. 92. The improved method as described in item 34 of the scope of the patent application, wherein the volatile residual gas stream part comprises the main part of the methane, lighter composition, and C2 composition. 93. The improved method as described in claim 35, wherein the volatile residual gas stream part comprises the main part of the methane, lighter composition, and C2 composition. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Cooperatives. 94. The improved method as described in item 36 of the scope of patent application, wherein the volatile residual gas stream part comprises the main part of the methane, lighter composition, and C2 composition. 95. The improved method as described in item 29 of the scope of the patent application, wherein the volatile residual gas stream part comprises the main part of the methane, lighter composition, C 2 composition, and C 3 composition. _.Page 167_ This paper size applies to China National Standard (CNS) A4 (210X297 mm) ABCD 580554 6. Application for patent scope 96. The improvement method described in item 30 of the scope of patent application, where the ( (Please read the notes on the back before filling this page) * The main part of the residual gas flow is the methane, lighter composition, C2 composition and C3 composition. 97. The improved method as described in item 31 of the scope of the patent application, wherein the volatile residual gas stream part comprises the main part of the formazan, lighter composition, C2 composition, and c3 composition. 98. The improved method as described in item 34 of the scope of the patent application, wherein the volatile residual gas flow portion 'sub-system contains the main components of the pinane, lighter composition, C2 composition, and C3 composition. 9 9. The improved method according to item 35 of the scope of the patent application, wherein the volatile residual gas stream part comprises the main part of the methane, lighter composition, C2 composition and C3 composition. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Cooperatives 100. The improved method as described in item 36 of the scope of patent application, wherein the volatile residual gas stream part comprises the main part of the methane, lighter composition, C2 composition and c3 composition. • 1 0 1. The improved device as described in item 69 of the patent application scope, wherein the volatile residual gas stream portion comprises the main part of the methane, lighter composition, and C2 composition. _.Page 168 This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) 580554 A8 B8 C8 D8 VI. Application for patent scope 102. The improved equipment described in item 73 of the scope of patent application, where (Please read the precautions on the back before filling out this page) * The residual residual gas flow part is the main part containing the methane, lighter composition, and C2 composition. 103. The improved device as described in item 76 of the scope of the patent application, wherein the volatile residual gas stream portion comprises the main portion of the methane, lighter composition, and C2 composition. 104. The improved device as described in item 77 of the scope of the patent application, wherein the volatile residual gas stream portion comprises the main portion of the methane, lighter composition, and C2 composition. 105. The improved device described in item 78 of the scope of the patent application, wherein the volatile residual gas stream portion comprises the main portion of the methane, lighter composition, and C2 composition. 106. The improved equipment described in item 82 of the scope of the patent application, in which the "Residual Air Flow" portion printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs contains the methane, the lighter component, and the C2 component . 107. The improved device according to item 85 of the scope of the patent application, wherein the volatile residual gas stream part comprises the main part of the methane, lighter composition, and C 2 composition. _.Page 169_ This paper size applies to China National Standard (CNS) A4 (210X297 mm) 580554 A8 B3 C8 D8 Patent Application Scope (Please read the precautions on the back before filling this page) 1 0 8 · If The improved device described in the patent application No. 86, wherein the volatile residual gas stream part includes the main part of the methane, lighter composition, and C2 composition. 109. The improved device according to item 69 of the scope of the patent application, wherein the volatile residual gas stream portion includes the main part of the methane, lighter composition, C2 • composition, and C3 composition. 1 10. The improved equipment as described in item 73 of the scope of the patent application, wherein the volatile residual gas stream part comprises the main part of the methane, lighter composition, C2 composition and C3 composition. 1 11. The improved device as described in item 76 of the scope of the patent application, wherein the volatile residual gas stream part comprises the main part of the pinane, lighter composition, C2 composition, and C3 composition. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, X Consumer Electronics Co., Ltd. 112. The improved equipment described in item 77 of the scope of patent application, in which the volatile residual gas stream part contains the main part of the methane, lighter composition, composition and C3 composition. 113. The improved device as described in item 78 of the scope of the patent application, wherein the volatile residual gas stream part comprises the main part of the pinane, lighter composition, C2 composition, and C3 composition. _ · Page 170 This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 580554 B8 C8 D8 Patent application scope 114. The improved equipment as described in item 82 of the patent application scope, where the volatile residual airflow Part contains the main part of the methane, lighter composition, composition and C3 composition, 115. The improved equipment as described in item 85 of the patent application scope, wherein the volatile residual gas stream part contains the methane, lighter composition, CV composition and C3 composition are the main parts. 116. The improved device according to item 86 of the scope of the patent application, wherein the volatile residual gas stream portion includes the main part of the methane, lighter composition, C2 composition, and C3 composition. (Please read the precautions on the back before composing this page) Printed by the Ministry of Economic Affairs and Intellectual Property Bureau X Consumer Affairs Co., Ltd. Article 171 This paper is in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm)