CN104073309B - The method of bio-natural gas preparation facilities and preparation thereof - Google Patents
The method of bio-natural gas preparation facilities and preparation thereof Download PDFInfo
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- CN104073309B CN104073309B CN201410333926.2A CN201410333926A CN104073309B CN 104073309 B CN104073309 B CN 104073309B CN 201410333926 A CN201410333926 A CN 201410333926A CN 104073309 B CN104073309 B CN 104073309B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000003345 natural gas Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 139
- 239000012528 membrane Substances 0.000 claims abstract description 73
- 238000000746 purification Methods 0.000 claims abstract description 45
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 36
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 11
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 6
- 239000003595 mist Substances 0.000 claims description 6
- 229920002530 polyetherether ketone Polymers 0.000 claims description 6
- 238000006477 desulfuration reaction Methods 0.000 claims description 5
- 230000023556 desulfurization Effects 0.000 claims description 5
- 238000002203 pretreatment Methods 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 235000011089 carbon dioxide Nutrition 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 239000000047 product Substances 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 238000010992 reflux Methods 0.000 description 7
- 238000007781 pre-processing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 210000000952 spleen Anatomy 0.000 description 4
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 235000009508 confectionery Nutrition 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses the method for bio-natural gas preparation facilities and preparation thereof, this device comprises and sequentially passes through pipeline and connect the first spiral-lobe compressor, the first purification pot, gas buffer tank and the first membrane module system, the high-pressure outlet of the first membrane module system connects product gas transport pipe, low tension outlet connects the second spiral-lobe compressor, the second purification pot and the second membrane module system successively by pipeline, the high-pressure outlet of the second membrane module system connects gas buffer tank, and low tension outlet connects exhaust emission pipe.The method comprises: original gas is entered the first purification pot and the first membrane module system after the first spiral-lobe compressor pressurization, high-voltage product gas exports through product gas transmission pipeline, low-pressure gas enters the second purification pot and the second membrane module system after entering the second spiral-lobe compressor pressurization in turn, concentrated gas backflow enters gas buffer tank, and remainder of exhaust gas is discharged.The present invention adopts two stages of compression and two-stage membrane sepn, and reduce film consumption at reduction compressor power, processing cost is low simultaneously.
Description
Technical field
The present invention relates to Sweet natural gas preparation field, be specifically related to the method for bio-natural gas preparation facilities and preparation thereof.
Background technology
Biogas and refuse embedded gas are sold for biological natural gas is sold Sweet natural gas or prepared compressed natural gas (CompressedNaturalGas, CNG) simultaneously by purification.Biogas uses gas membrane Seperation Technology in purification process.Gas membrane Seperation Technology is the forefront technology being applied to preparing bio-natural gas in recent years, is widely used in biogas and refuse embedded gas prepares biological natural gas market.This technology and other traditional decarbonization process (amine washes method, pressure swing adsorption process, high-pressure washing) have obvious advantage, such as: operation runs simple, take up an area economize, without any pollution and working cost low.
Existing bio-natural gas preparation method: the biogas after desulfurization, enter gas buffer tank, then by compressor pressurizes, pass through preprocessing part, namely after gas drier, activated charcoal filter, hay tank and thermostat, remove the particle in the grease and gas that water vapour in gas and compressor produce, in temperature controlling range, enter membrane module system, the membrane module of directly being connected by two-stage is separated generation three and works off one's feeling vent one's spleen.First part is for directly to generate gas product, and gas is at high pressure conditions, and second section is backflow gas, and at low-pressure state, this partial reflux gas and air inlet merge and enter compressor through surge tank, and Part III, in low pressure, is that carbon dioxide-enriched gas is excluded.
The existing device utilizing biogas to prepare bio-natural gas, the cost of the bio-natural gas process gas obtained is higher.
Summary of the invention
Provide hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or integral part, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
The object of the embodiment of the present invention is the defect for above-mentioned prior art, provides the bio-natural gas preparation facilities that a kind of processing cost is low.
To achieve these goals, the technical scheme that the present invention takes is:
A kind of bio-natural gas preparation facilities, comprise and sequentially pass through pipeline and connect the first spiral-lobe compressor, first purification pot, described first purification pot connects gas buffer tank by pipeline, described gas buffer tank connects the first membrane module system by pipeline, the high-pressure outlet of described first membrane module system connects product gas transport pipe, the low tension outlet of described first membrane module system connects the second spiral-lobe compressor by pipeline, described second spiral-lobe compressor connects the second purification pot by pipeline, described second purification pot connects the second membrane module system by pipeline, the high-pressure outlet of described second membrane module system connects one end of gas backstreaming pipe, the other end of described gas backstreaming pipe connects gas buffer tank, the low tension outlet of described second membrane module system connects exhaust emission pipe.
The present invention also provides a kind of method using above-mentioned bio-natural gas preparation facilities to prepare bio-natural gas, comprises the following steps:
Original gas is entered the first purification pot after the first spiral-lobe compressor pressurization and carries out pre-treatment, pretreated gas enters the first membrane module system, the high-voltage product gas produced exports through product gas transmission pipeline, low-pressure gas enters the second purification pot and the second membrane module system after entering the second spiral-lobe compressor pressurization in turn, the concentrated gas obtained enters gas buffer tank by the backflow of gas backstreaming pipe, and remaining low pressure exhaust gas is discharged by exhaust emission pipe.
Compared with prior art, the invention has the beneficial effects as follows:
1. the present invention adopts two stages of compression and two-stage membrane separation technique, because greatly reduce the reflux ratio of gas, gas backstreaming is than minimizing one times compared with traditional technology, greatly reduces compressor total installed capacity power, also reduce film consumption, minimizing 40% film consumption compared with traditional technology simultaneously.Product is all greatly reduced on one-time investment and running cost, reduce 30-40% compared with traditional technology.
2., because membrane module material high-quality characteristic omits loaded down with trivial details pre-processing device in traditional technology, the devices such as undesirable gas moisture eliminator of the present invention, activated carbon filtration tank, thermostat, make operational path simpler compared with traditional technology, convenient operation is safeguarded.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the bio-natural gas preparation facilities that Fig. 1 provides for the embodiment of the present invention.
Reference numeral:
1-first spiral-lobe compressor; 2-exhaust emission pipe; 3-first purification pot; 4-gas buffer tank; 5-first membrane module system; 6-product gas transport pipe; 7-second spiral-lobe compressor; 8-second purification pot; 9-second membrane module system; 10-gas backstreaming pipe.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.The element described in an accompanying drawing of the present invention or a kind of embodiment and feature can combine with the element shown in one or more other accompanying drawing or embodiment and feature.It should be noted that for purposes of clarity, accompanying drawing and eliminate expression and the description of unrelated to the invention, parts known to persons of ordinary skill in the art and process in illustrating.Based on the embodiment in the present invention, those of ordinary skill in the art, not paying the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1, a kind of bio-natural gas preparation facilities, comprise and sequentially pass through pipeline and connect the first spiral-lobe compressor 1 and the first purification pot 3, first purification pot 3 connects gas buffer tank 4 by pipeline, gas buffer tank 4 connects the first membrane module system 5 by pipeline, the high-pressure outlet of the first membrane module system 5 is connected with product gas transport pipe 6, the low tension outlet of the first membrane module system 5 connects the second spiral-lobe compressor 7 by pipeline, second spiral-lobe compressor 7 connects the second purification pot 8 by pipeline, second purification pot 8 connects the second membrane module system 9 by pipeline, the high-pressure outlet of the second membrane module system 9 connects one end of gas backstreaming pipe 10, the other end of gas backstreaming pipe 10 connects gas buffer tank 4, the low tension outlet of the second membrane module system 9 connects exhaust emission pipe 2.
Bio-natural gas preparation facilities of the present invention is by two stages of compression and two-stage membrane sepn, and the gas product cost of production is low.High-pressure outlet refers to that outlet gas pressure is 10-12 normal atmosphere, and low tension outlet refers to that outlet gas pressure is 1 normal atmosphere.High pressure and low pressure refer to two comparatively speaking.
The present embodiment is on the basis of above-described embodiment, and the first spiral-lobe compressor 1, first purification pot 3, gas buffer tank 4, first membrane module system 5, second spiral-lobe compressor 7, second purification pot 8 and the second membrane module system 9 are arranged in freight container.
Equipment of the present invention takes up an area to be economized, and all skid is in freight container for all devices, easy for installation, simultaneously can according to actual motion load adjustment system usage quantity, maximum saving energy consumption.Be applicable to remote districts to install.
The present embodiment is on the basis of above-described embodiment, first purification pot of the present invention and the second purification pot include the main line filter, oil mist filter and the micro-oil mist filter that set gradually, by making dust content in gas be less than 0.3um after the first purification pot purification, mist of oil is less than 0.01ppm.Second purification pot purifying treatment removes the oil and impurity that bring after gas is pressurizeed by the second spiral-lobe compressor, and be less than 0.3um by dust in gas after the process of the second purification pot, mist of oil is less than 0.01ppm.
The present embodiment is on the basis of above-described embodiment, and the first membrane module system 8 and the second membrane module system 9 include the membrane module that two or more is connected in parallel, and described membrane module comprises film and shell, and described film is arranged in described shell.
Device of the present invention, by the mode of multiple membrane module parallel connection, realizes the membrane sepn to gas.
Preferably, film is polyether-ether-ketone resin film.
Film of the present invention adopts PEEK (PEEK) resin to be film prepared by raw material, polyether-ether-ketone (PEEK) resin is a kind of special engineering plastics of excellent performance, film is in erosion resistance, high temperature resistance and liquid water there is very outstanding feature, before biogas, purification only needs to need process to dust and oil residues, process reaches dust and is less than 0.3UM, fat content is less than 0.01ppm, to water, hydro carbons and temperature do not have pre-processing requirements, so compared with conventional film pretreatment technology, eliminate the drying installation that dewaters, remove the active carbon purifying tank of hydrocarbon and thermostat three equipment of protective membrane efficiency and step, greatly save production cost.
The present embodiment is on the basis of above-described embodiment, and the ratio of the total area of the film in the first membrane module system 8 and the second membrane module system 9 is 4-5:1.Namely in the first membrane module system 8, the total area of film is 4-5 times of the total area of film in the second membrane module system 9, and this ratio setting can make methane purification arrive one-level Natural gas standard, and methane content is greater than 95%.
The present invention also provides a kind of method using above-mentioned bio-natural gas preparation facilities to prepare bio-natural gas, comprises the following steps:
Original gas is entered the first purification pot after the first spiral-lobe compressor pressurization and carries out pre-treatment, pretreated gas enters the first membrane module system, the high-voltage product gas produced exports through product gas transmission pipeline, low-pressure gas enters the second purification pot and the second membrane module system after entering the second spiral-lobe compressor pressurization in turn, the concentrated gas obtained enters gas buffer tank by the backflow of gas backstreaming pipe, and remaining low pressure exhaust gas is discharged by exhaust emission pipe.
The high-voltage product gas that the present invention produces exports through product gas transmission pipeline, a high end finger 10-12 normal atmosphere, low-pressure gas refers to 1 normal atmosphere, remaining low-pressure gas enters the second purification pot after entering the second spiral-lobe compressor pressurization again carries out purifying treatment and removes the oil that brings of compressor pressurizes and impurity, and then the second membrane module system that enters carries out membrane sepn, high pressure gas after separation flow to into gas buffer tank by back of pipeline, and remaining low pressure exhaust gas is discharged.The present invention adopts two stages of compression and two-stage membrane sepn, and reduce film consumption with traditional technology than reducing compressor power, pre-treatment becomes simple, and processing cost is low simultaneously.The present invention is based on gas membrane Seperation Technology, realize the separation to predominant gas methane and carbon dioxide by the method for two stages of compression and two-stage membrane sepn, finally reach natural gas motorcar standard.
Preferably, original gas of the present invention is biogas or refuse embedded gas, and described original gas needs before entering the first spiral-lobe compressor to carry out desulfurization process in advance.Present invention achieves and utilize biogas and refuse embedded gas to prepare bio-natural gas, in gas product, the volumn concentration of methane is more than 95%, and the volumn concentration of carbonic acid gas is below 3%.
Preferably, the pressure after original gas is pressurizeed by the first spiral-lobe compressor is 10-12 normal atmosphere, and the pressure after the second spiral-lobe compressor pressurization is 10-12 normal atmosphere.
Preferably, in described original gas, the volumn concentration of methane is 45-60%, and the volumn concentration of carbonic acid gas is 40-50%.
Below by a comparative example, the present invention is described further:
The gas used and the requirement to gas product:
1, thick biogas
2. gas product requirement
Existing technique:
Thick biogas after desulfurization, hydrogen sulfide is containing being less than 10ppm, thick biogas out enters spiral-lobe compressor afterwards from gas buffer cabinet, 10 normal atmosphere are pressurized to by spiral-lobe compressor, pass through preprocessing part, comprise the moisture eliminator that dewaters, activated charcoal filter and smart filter tank and temperature regulator enter film processing system, drying machine is removed water vapor in methane and is reached natural gas water content standard then after purification pot purification, remove the grease produced by the particle in biogas and spiral-lobe compressor, remove hydrocarbon micro-in biogas through activated charcoal filter again and guarantee the optimum temps of gas in film operating mode through thermostat again, finally enter membrane module system, produce three by membrane sepn to work off one's feeling vent one's spleen.
First high-pressure outlet gas for directly to generate gas product, CH
4content is greater than 95%, and gas is in high pressure conditions, can enter CNG gas booster compressor; Work off one's feeling vent one's spleen as backflow gas for second, the reflux ratio of backflow gas is 200% of air input, and namely reflux gas amount is 200% air input, is in low-pressure state, and the thick biogas of this partial reflux and original air inlet merges and again enters spiral-lobe compressor through surge tank; Working off one's feeling vent one's spleen as waste gas, be in low-pressure state for 3rd, is that carbon dioxide-enriched gas is excluded, and this technique methane losses rate is 6%.
Existing technique equipment used, gas flow and component are as shown in table 1:
Table 1
Technique of the present invention:
See Fig. 1, thick biogas after desulfurization, hydrogen sulfide is containing being less than 10ppm, thick biogas out enters the first spiral-lobe compressor 1 afterwards from gas buffer cabinet 11, 10 normal atmosphere are pressurized to by the first spiral-lobe compressor 1, after preprocessing part first purification pot 3, remove the particle in the oil and biogas produced after being cooled by gas pressurization, enter gas buffer tank 4, the first membrane module system 5 is together entered again with the second membrane module system 9 backflow gas out, by generating high-voltage product gas after the first membrane module system 5, meet Natural gas standard, be delivered into marketing by product gas transport pipe 6 to sell, all the other low-pressure gases in Cemented filling to the second spiral-lobe compressor 7 by secondary pressurized, purifying treatment is carried out again through the second purification pot 8, by the second membrane module system 9, the high pressure reflow gas backflow air inlet body surge tank 4 that second membrane module system 9 produces, the reflux ratio of backflow gas is 100% of air input, waste gas is arranged from exhaust pipe 2.
Technique of the present invention produces three portion gas, and first part's gas is the gas product directly generated, CH
4content is greater than 95%, and gas is in high pressure conditions, and second section gas is backflow gas, at low-pressure state, this partial reflux gas and air inlet merge and enter gas buffer tank, and Part III gas is waste gas, be in low-pressure state, be the gas of carbon dioxide-enriched, be finally excluded.Technique methane losses rate of the present invention is 6%.
Equipment used of the present invention, gas flow and component are as shown in table 2:
Table 2
Comparative result is as shown in table 3:
Table 3
More known by upper table 3, preparation cost of the present invention is lower than existing technique preparation cost.
State in each embodiment on the invention, the sequence number of embodiment is only convenient to describe, and does not represent the quality of embodiment.The description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In the embodiments such as apparatus and method of the present invention, obviously, each parts or each step reconfigure after can decomposing, combine and/or decomposing.These decompose and/or reconfigure and should be considered as equivalents of the present invention.Simultaneously, above in the description of the specific embodiment of the invention, the feature described for a kind of embodiment and/or illustrate can use in one or more other embodiment in same or similar mode, combined with the feature in other embodiment, or substitute the feature in other embodiment.
Should emphasize, term " comprises/comprises " existence referring to feature, key element, step or assembly when using herein, but does not get rid of the existence or additional of one or more further feature, key element, step or assembly.
Although last it is noted that described the present invention and advantage thereof in detail above, be to be understood that and can carry out various change when not exceeding the spirit and scope of the present invention limited by appended claim, substituting and converting.And scope of the present invention is not limited only to the specific embodiment of process, equipment, means, method and step described by specification sheets.One of ordinary skilled in the art will readily appreciate that from disclosure of the present invention, can use perform the function substantially identical with corresponding embodiment described herein or obtain and its substantially identical result, existing and that will be developed in the future process, equipment, means, method or step according to the present invention.Therefore, appended claim is intended to comprise such process, equipment, means, method or step in their scope.
Claims (10)
1. a bio-natural gas preparation facilities, comprise and sequentially pass through pipeline and connect the first spiral-lobe compressor, first purification pot, it is characterized in that, described first purification pot connects gas buffer tank by pipeline, described gas buffer tank connects the first membrane module system by pipeline, the high-pressure outlet of described first membrane module system connects product gas transport pipe, the low tension outlet of described first membrane module system connects the second spiral-lobe compressor by pipeline, described second spiral-lobe compressor connects the second purification pot by pipeline, described second purification pot connects the second membrane module system by pipeline, the high-pressure outlet of described second membrane module system connects one end of gas backstreaming pipe, the other end of described gas backstreaming pipe connects gas buffer tank, the low tension outlet of described second membrane module system connects exhaust emission pipe.
2. bio-natural gas preparation facilities according to claim 1, it is characterized in that, described first spiral-lobe compressor, the first purification pot, gas buffer tank, the first membrane module system, the second spiral-lobe compressor, the second purification pot and the second membrane module Operation system setting are in freight container.
3. bio-natural gas preparation facilities according to claim 1, is characterized in that, described first purification pot and the second purification pot include the main line filter, oil mist filter and the micro-oil mist filter that set gradually.
4. the bio-natural gas preparation facilities according to any one of claim 1-3, it is characterized in that, described first membrane module system and the second membrane module system include the membrane module that two or more is connected in parallel, and described membrane module comprises film and shell, and described film is arranged in described shell.
5. bio-natural gas preparation facilities according to claim 4, is characterized in that, described film is polyether-ether-ketone resin film.
6. bio-natural gas preparation facilities according to claim 5, is characterized in that, the ratio of the total area of the film in described first membrane module system and the second membrane module system is 4-5:1.
7. use the bio-natural gas preparation facilities described in any one of claim 1-6 to prepare a method for bio-natural gas, it is characterized in that, comprise the following steps:
Original gas is entered the first purification pot after the first spiral-lobe compressor pressurization and carries out pre-treatment, pretreated gas enters the first membrane module system, the high-voltage product gas produced exports through product gas transmission pipeline, low-pressure gas enters the second purification pot and the second membrane module system after entering the second spiral-lobe compressor pressurization in turn, the concentrated gas obtained enters gas buffer tank by the backflow of gas backstreaming pipe, and remaining low pressure exhaust gas is discharged by exhaust emission pipe.
8. method according to claim 7, is characterized in that, described original gas is biogas or refuse embedded gas, and described original gas needs before entering the first spiral-lobe compressor to carry out desulfurization process.
9. method according to claim 7, is characterized in that, the pressure after original gas is pressurizeed by described first spiral-lobe compressor is 10-12 normal atmosphere, and the pressure after the second spiral-lobe compressor pressurization is 10-12 normal atmosphere.
10. method according to claim 7, is characterized in that, in described original gas, the volumn concentration of methane is 45-60%, and the volumn concentration of carbonic acid gas is 40-50%.
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| CN102182919A (en) * | 2011-03-26 | 2011-09-14 | 宁波鲍斯能源装备股份有限公司 | Device and method for recovery and reliquefaction of boil-off gas of liquefied natural gas |
| CN202012731U (en) * | 2011-03-26 | 2011-10-19 | 宁波鲍斯能源装备股份有限公司 | Device for recovering LNG (liquefied natural gas) evaporated gas and liquefying again |
| CN203976746U (en) * | 2014-07-14 | 2014-12-03 | 北京海珍志阔科技有限公司 | Bio-natural gas preparation facilities |
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| CN102182919A (en) * | 2011-03-26 | 2011-09-14 | 宁波鲍斯能源装备股份有限公司 | Device and method for recovery and reliquefaction of boil-off gas of liquefied natural gas |
| CN202012731U (en) * | 2011-03-26 | 2011-10-19 | 宁波鲍斯能源装备股份有限公司 | Device for recovering LNG (liquefied natural gas) evaporated gas and liquefying again |
| CN203976746U (en) * | 2014-07-14 | 2014-12-03 | 北京海珍志阔科技有限公司 | Bio-natural gas preparation facilities |
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