CN102121370B - Skid-mounted bradenhead gas four-tower separation recovery device and method thereof - Google Patents
Skid-mounted bradenhead gas four-tower separation recovery device and method thereof Download PDFInfo
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Abstract
The invention claims a skid-mounted bradenhead gas four-tower separation recovery device and a method thereof; the device comprises a methane rectifying tower, an ethane rectifying tower, a propane rectifying tower and a heavy-component rectifying tower which are communicated with each other, wherein the methane rectifying tower is used for receiving gas components of the bradenhead gas which is desulfurized, cleaned, compressed and refrigerated to obtain methane with a purity of at least 95% at the tower top, and inputting tower bottom discharge material to the ethane rectifying tower; ethane with a purity of at least 95% is obtained at the tower top, and the discharged materials from the tower bottom are input to the propane rectifying tower; propane with a purity of at least 90% is obtained at the tower top, and the discharged materials from the tower bottom are input to the heavy-component rectifying tower; and butane with a purity of at least 90% is obtained at the tower top, and light oil with a purity of at least 90% at the tower bottom. Based on different components and contents of bradenhead gas, the bradenhead gas is separated and recovered with liquid-nitrogen low-temperature rectifying method; the whole device is skid-mounted; the separation recovery efficiency is relatively higher; and four types of products of dry gases (methane and ethane), liquefied gases (propane and butane) and light oil (C5+) can be obtained finally.
Description
Technical Field
The invention relates to a wellhead gas separation and recovery device and method, in particular to a skid-mounted wellhead gas four-tower separation and recovery device and method.
Background
Well head gas mainly refers to the blow-down gas of small station associated gas, remote wells and scattered low-yield gas wells in remote areas which are not suitable for building gas transmission pipelines, and also comprises the torch blow-down gas of oil and gas gathering and transportation processing stations and the like. Due to the development difficulties of low yield, fast pressure drop and the like, the well head gas is extracted by using the conventional natural gas treatment process, and the engineering investment and the operation cost are higher and uneconomical.
At present, well head gas recovery is used as an economic and environment-friendly technology, the marketization process is accelerated continuously, various scientific research units and companies develop different process methods, various technologies and economic cost need to be considered comprehensively, the technology of rectification, compression and the like mature in China is combined, the recovery technology with low efficiency and high energy consumption is optimized, and a skid-mounted recovery device is formed and is pushed to the market.
Due to C3 +The above heavy component is relative to C1、C2The light component has higher application value and economic benefit, so the development of light hydrocarbon recovery aiming at recovering the heavy component has very important significance. The natural gas or associated gas recovery carried out in many domestic oil fields is mainly to recover liquid hydrocarbon, namely LPG, wherein the average recovery rate of propane is less than 60 percent. The light hydrocarbon recovery developed abroad is mostly C recovery2 +The deep cooling device for the purpose generally has the propane recovery rate of over 90 percent and the ethane recovery rate of over 80 percent. At present, the skid-mounted device realizes the efficient separation and recovery of wellhead gas in China, and has great difficulty.
In recent years, with the aggravation of energy crisis, the worldwide demand for energy conservation and consumption reduction is higher and higher, and some small-gas-amount skid-mounted light hydrocarbon separation and recovery devices are beginning to emerge. The victory oil field develops a skid-mounted oil-gas separation device for offshore oil tankers, and oil and gas are subjected to secondary separation before crude oil enters an oil tank. The central oil field adopts a skid-mounted L-CNG automobile gas filling device, and integrates LNG storage, high-pressure LNG vaporization and gas sale metering. Shanghai university of traffic has developed sled dress type LNG device, adopts N2-CH4The natural gas is liquefied in the liquefaction process of the expansion machine. A skid-mounted turbine expansion refrigeration light hydrocarbon recovery device is developed in the North China oil field and is used for recovering the heavy hydrocarbon part above propane in well head gas. The skid-mounted separation and recovery devices in China mainly aim at simple separation of oil gas and recovery of heavy hydrocarbon components above propane in oil gas resources. Therefore, skid-mounted separation and recovery devices and equipment are required to be developed to effectively recover wellhead gas, so that energy is saved, and the problem of environmental pollution generated in emptying and fuel treatment is solved.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, well head gas recovery equipment is low in skid-mounted integration degree and recovery efficiency, and the like, and provides a skid-mounted well head gas four-tower separation recovery device and method.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a skid-mounted four-tower separation and recovery device for wellhead gas, wherein the skid-mounted four-tower separation and recovery device comprises a methane rectifying tower, an ethane rectifying tower, a propane rectifying tower and a heavy component rectifying tower which are communicated with each other; the methane rectifying tower is used for receiving gas components of inlet gas subjected to desulfurization, impurity removal, compression and refrigeration, obtaining methane with the purity of at least 95% at the top of the methane rectifying tower, and inputting tower kettle discharge of the methane rectifying tower into the ethane rectifying tower; obtaining ethane with the purity of at least 95% at the top of the ethane rectifying tower, and inputting the tower bottom discharge of the ethane rectifying tower into the propane rectifying tower; obtaining propane with the purity of at least 90% at the top of the propane rectifying tower, and inputting the tower bottom discharge of the propane rectifying tower into the heavy component rectifying tower; and obtaining butane with the purity of at least 90% at the tower top of the heavy component rectifying tower, and obtaining light oil with the purity of at least 90% at the tower bottom of the heavy component rectifying tower.
In the skid-mounted four-tower well head gas separation and recovery device, the gas components are separated and recovered in the methane rectifying tower at the operating pressure of 1.5-21.7 MPa and the operating temperature of-100-25 ℃; and separating and recovering the tower kettle discharge of the methane rectifying tower in the ethane rectifying tower at the operating pressure of 2.6-2.8 MPa and the operating temperature of-10-120 ℃.
In the skid-mounted four-tower well head gas separation and recovery device, the tower kettle discharge of the ethane rectifying tower is separated and recovered in the propane rectifying tower at the operating pressure of 1.5-1.7 MPa and the operating temperature of 40-130 ℃.
In the skid-mounted four-tower well head gas separation and recovery device, the tower bottom discharge of the propane rectifying tower is separated and recovered in the heavy component rectifying tower at the operating pressure of 1.5-1.7 MPa and the operating temperature of 90-170 ℃.
In the skid-mounted four-tower well head gas separation and recovery device, the invention also comprises a desulfurization reaction separator communicated with the methane rectifying tower; and inputting the well head gas and the alkali liquor into the desulfurization reaction separator for desulfurization and impurity removal.
In the skid-mounted four-tower well head gas separation and recovery device, a compressor, a heat exchanger and a gas-liquid separation tank are sequentially communicated between the desulfurization reaction separator and the methane rectifying tower so as to compress and refrigerate the well head gas subjected to desulfurization and impurity removal.
According to another aspect of the invention, a skid-mounted four-tower well head gas separation and recovery method is provided, which comprises the following steps:
separating and recovering gas components of inlet gas subjected to desulfurization, impurity removal, compression and refrigeration in a methane rectifying tower, so as to obtain methane with the purity of at least 95% at the tower top of the methane rectifying tower, and inputting tower kettle discharge of the methane rectifying tower into an ethane rectifying tower;
separating and recovering the tower bottom discharge of the methane rectifying tower in an ethane rectifying tower so as to obtain ethane with the purity of at least 95% at the tower top of the ethane rectifying tower, and inputting the tower bottom discharge of the ethane rectifying tower into a propane rectifying tower;
separating and recovering the tower bottom discharge of the ethane rectifying tower in the propane rectifying tower, so as to obtain propane with the purity of at least 90% at the tower top of the propane rectifying tower, and inputting the tower bottom discharge of the propane rectifying tower into a heavy component rectifying tower;
and separating and recovering the tower bottom discharge of the propane rectifying tower in the heavy component rectifying tower, so that butane with the purity of at least 90% is obtained at the tower top of the heavy component rectifying tower, and light oil with the purity of at least 90% is obtained at the tower bottom of the heavy component rectifying tower.
In the skid-mounted four-tower well head gas separation and recovery method, the gas components are separated and recovered in the methane rectifying tower at the operating pressure of 1.5-21.7 MPa and the operating temperature of-100-25 ℃; and separating and recovering the tower kettle discharge of the methane rectifying tower in the ethane rectifying tower at the operating pressure of 2.6-2.8 MPa and the operating temperature of-10-120 ℃.
In the skid-mounted four-tower separation and recovery method for wellhead gas, the tower kettle discharge of the ethane rectifying tower is separated and recovered in the propane rectifying tower at the operating pressure of 1.5-1.7 MPa and the operating temperature of 40-130 ℃.
In the skid-mounted four-tower separation and recovery method for wellhead gas, the tower bottom discharge of the propane rectifying tower is separated and recovered in the heavy component rectifying tower at the operating pressure of 1.5-1.7 MPa and the operating temperature of 90-170 ℃.
The skid-mounted four-tower well head gas separation and recovery device and the skid-mounted four-tower well head gas separation and recovery method have the following beneficial effects: based on different components and contents of well head gas, the method of liquid nitrogen low-temperature rectification is adopted for carrying outThe separation and recovery are realized, the skid-mounted integral equipment is realized, the separation and recovery efficiency is higher, and finally, dry gas (methane and ethane), liquefied gas (propane and butane) and light oil (C) can be obtained5 +) Four kinds of products.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic system structure diagram of a skid-mounted wellhead gas four-tower separation and recovery device;
FIG. 2 is a flow chart of the skid-mounted four-tower well head gas separation and recovery method.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the skid-mounted four-tower separation and recovery device for wellhead gas mainly comprises a methane rectifying tower 11, an ethane rectifying tower 12, a propane rectifying tower 2 and a heavy component rectifying tower 3 which are communicated with each other, so as to separate and recover wellhead gas, associated gas of remote oil fields and oil tank volatile gas, gas station volatile gas, flare gas, coal bed gas and natural gas, and four types of chemical energy products are formed by adopting a separation method of liquid nitrogen low-temperature rectification according to the components and the content of raw material gas: methane (C)1Fraction), ethane (C)2Fraction), propane (C)3Fraction) and gas oil (C)4 +Fractions). The wellhead gas index applicable to the skid-mounted wellhead gas four-tower separation device can be as follows: gas throughput: crude oil associated gas 5 x 104-10×104Nm3D; the pressure range of the raw material gas is as follows: 0.1-0.4 MPa; temperature range of gasEnclosing: 20-50 ℃. In the concrete work, the methane rectifying tower 11 is used for receiving gas components of inlet gas subjected to desulfurization, impurity removal and compression refrigeration, obtaining methane with the purity of at least 95% at the tower top of the methane rectifying tower 11, inputting tower kettle discharge of the methane rectifying tower 11 into the ethane rectifying tower 12, obtaining ethane with the purity of at least 95% at the tower top of the ethane rectifying tower 12, and inputting tower kettle discharge of the ethane rectifying tower 12 into the propane rectifying tower 2; obtaining propane with the purity of at least 90% at the top of the propane rectifying tower 2, and inputting the tower bottom discharge of the propane rectifying tower 2 into a heavy component rectifying tower 3; butane with a purity of at least 90% is obtained at the top of the heavy component rectification column 3, and light oil with a purity of at least 90% is obtained at the bottom of the heavy component rectification column 3.
For the working conditions in the methane rectifying tower 11, the ethane rectifying tower 12, the propane rectifying tower 2 and the heavy component rectifying tower 3, it is preferable that the gas components are separated and recovered in the methane rectifying tower 11 at an operating pressure of 1.5 to 1.7MPa and an operating temperature of-100 to 25 ℃. The tower kettle discharge of the methane rectifying tower 11 is separated and recovered in an ethane rectifying tower 12 under the operation pressure of 2.6-2.8 MPa and the operation temperature of-10-120 ℃. The tower bottom discharge of the ethane rectifying tower 12 is separated and recovered in the propane rectifying tower 2 under the operation pressure of 1.5-1.7 MPa and the operation temperature of 40-130 ℃. And separating and recovering the tower kettle discharge of the propane rectifying tower 2 in the heavy component rectifying tower 3 at the operating pressure of 1.5-1.7 MPa and the operating temperature of 90-170 ℃.
The wellhead gas from the oil well usually contains a small amount of sulfide and some solid-liquid impurities, so the skid-mounted wellhead gas four-tower separation and recovery device also comprises a desulfurization reaction separator 4 communicated with the methane rectifying tower 11; as shown in FIG. 1, wellhead gas and alkali liquor are fed into a desulfurization reaction separator 4 to carry out desulfurization and impurity removal on the wellhead gas through chemical action. And then, the well head gas after impurity removal is compressed, cooled and shallowly cooled, and therefore, a compressor 5, a heat exchanger 6 and a gas-liquid separation tank 7 are sequentially communicated between the desulfurization reaction separator 4 and the methane rectifying tower 11 so as to compress and refrigerate the well head gas after desulfurization and impurity removal.
After the well head gas is subjected to pretreatment by the desulfurization reaction separator 4, the compressor 5, the heat exchanger 6 and the gas-liquid separation tank 7, heavy components of condensate oil in the well head gas after the pretreatment can be separated and input into the propane rectifying tower 2. The gaseous light components in the well head gas after the pretreatment enter a methane rectifying tower 11 for efficient separation, the methane is output from the top of the methane rectifying tower, and the rest of the fraction (namely, the discharge from the tower bottom) enters an ethane rectifying tower 12. The light fraction at the top of the ethane rectifying tower 12 passes through a membrane separator 8 to be separated and remove carbon dioxide to obtain ethane, the rest fraction (namely, the tower bottom discharge) enters a propane rectifying tower 2 to obtain propane at the top of the propane rectifying tower 2, the tower bottom discharge of the propane rectifying tower 2 is input into a heavy component rectifying tower 3 to obtain butane at the top of the heavy component rectifying tower 3, and C is output at the tower bottom of the heavy component rectifying tower 35 +The above heavy components. The skid-mounted four-tower wellhead gas separation and recovery device can be operated and adjusted according to different components and contents of raw materials, is optimally designed in terms of energy consumption, and finally separates four high-purity chemical energy products with high recovery rate.
The skid-mounted four-tower well head gas separation and recovery device is subjected to a chemical separation technology mainly based on liquid nitrogen low-temperature rectification, and desulfurization, decarbonization and impurity removal mainly based on membrane separation and chemical desulfurization to finally obtain dry gas (methane and ethane), liquefied gas (propane and butane) and light oil (C)5 +) Four kinds of products. The performance indexes are as follows:
the quality index is as follows:
methane C1Not less than 95 percent and ethane C2More than or equal to 95 percent; propane C3More than or equal to 90 percent; light oil C5 +≥90％。
The recovery rate index is as follows:
methane C1Not less than 95 percent and ethane C2More than or equal to 80 percent; propane C3More than or equal to 90 percent; light oil C5 +≥90％。
In a preferred embodiment, the raw well head gas is subjected to chemical desulfurization and impurity removal in a desulfurization reaction separator 4, then is subjected to compression refrigeration in a compressor 5, a heat exchanger 6 and a gas-liquid separation tank 7, gas components enter a methane rectifying tower 11, and methane with the purity of 96% is obtained at the top of the methane rectifying tower 11 under the conditions that the operating pressure is 1.6MPa, the operating temperature at the top of the tower is-97 ℃ and the operating temperature at the bottom of the tower is 20 ℃. After the tower bottom discharge of the methane rectifying tower 11 enters an ethane rectifying tower 12, under the conditions that the operating pressure is 2.7MPa, the tower top operating temperature is minus 5 ℃ and the tower bottom operating temperature is 115 ℃, the light fraction at the tower top of the ethane rectifying tower 12 is separated by a membrane separator 8 to remove carbon dioxide, and then ethane with the purity of more than 97 percent is obtained. Discharging from the tower bottom of the ethane rectifying tower 12 to enter a propane rectifying tower 2, and obtaining propane with purity of 97% from the tower top of the propane rectifying tower 2 under the conditions that the operating pressure is 1.6MPa, the operating temperature of the tower top is 45 ℃ and the operating temperature of the tower bottom is 125 ℃. Discharging from the bottom of the propane rectifying tower 2 to enter a heavy component rectifying tower 3, and obtaining 90% light oil under the conditions that the operating pressure is 1.6MPa, the operating temperature at the top of the tower is 94 ℃ and the operating temperature at the bottom of the tower is 167 ℃.
In another preferred embodiment, the raw material well head gas is subjected to chemical desulfurization and impurity removal in a desulfurization reaction separator 4, then is subjected to compression refrigeration in a compressor 5, a heat exchanger 6 and a gas-liquid separation tank 7, and gas components enter a methane rectifying tower 11, and under the conditions that the operating pressure is 1.7MPa, the operating temperature of the top of the tower is-100 ℃, and the operating temperature of the bottom of the tower is 20 ℃, methane with the purity of 96% is obtained at the top of the methane rectifying tower 11. After the tower bottom discharge of the methane rectifying tower 11 enters an ethane rectifying tower 12, under the conditions that the operating pressure is 2.8MPa, the tower top operating temperature is-10 ℃ and the tower bottom operating temperature is 115 ℃, the light fraction at the tower top of the ethane rectifying tower 12 is separated by a membrane separator 8 to remove carbon dioxide, and then ethane with the purity of more than 97 percent is obtained. Discharging from the tower bottom of the ethane rectifying tower 12 to enter a propane rectifying tower 2, and obtaining propane with purity of 97% from the tower top of the propane rectifying tower 2 under the conditions that the operating pressure is 1.7MPa, the operating temperature of the tower top is 50 ℃ and the operating temperature of the tower bottom is 125 ℃. Discharging from the bottom of the propane rectifying tower 2 to enter a heavy component rectifying tower 3, and obtaining 90% light oil under the conditions that the operating pressure is 1.7MPa, the operating temperature at the top of the tower is 100 ℃ and the operating temperature at the bottom of the tower is 167 ℃.
In another preferred embodiment, the raw well head gas is subjected to chemical desulfurization and impurity removal in the desulfurization reaction separator 4, then is subjected to compression refrigeration in the compressor 5, the heat exchanger 6 and the gas-liquid separation tank 7, and the gas components enter the methane rectifying tower 11, so that methane with the purity of 96% is obtained at the top of the tower under the conditions that the operating pressure is 1.5MPa, the operating temperature at the top of the tower is-95 ℃ and the operating temperature at the bottom of the tower is 25 ℃. After the tower bottom discharge of the methane rectifying tower 11 enters an ethane rectifying tower 12, under the conditions that the operating pressure is 2.6MPa, the tower top operating temperature is 0 ℃ and the tower bottom operating temperature is 120 ℃, the light fraction at the tower top is separated by a membrane separator 8 to remove carbon dioxide, and ethane with the purity of more than 97 percent is obtained. The tower bottom discharge of the ethane rectifying tower 12 enters a propane rectifying tower 2, and under the conditions that the operating pressure is 1.5MPa, the tower top operating temperature is 50 ℃ and the tower bottom operating temperature is 130 ℃, a propane product with the purity of 97% is obtained at the tower top. The bottom discharge of the propane rectifying tower 2 enters a heavy component rectifying tower 3, and 90% of light oil is obtained under the conditions that the operating pressure is 1.5MPa, the operating temperature of the top of the tower is 95 ℃ and the operating temperature of the bottom of the tower is 170 ℃.
The flow chart of the skid-mounted four-tower wellhead gas separation and recovery method shown in fig. 2 comprises the following steps:
s21: separating and recovering gas components of inlet gas subjected to desulfurization, impurity removal, compression and refrigeration in a methane rectifying tower 11, so as to obtain methane with the purity of at least 95% at the tower top of the methane rectifying tower 11, and inputting tower kettle discharge of the methane rectifying tower into an ethane rectifying tower; wherein the gas components are separated and recovered under the operating pressure of 1.5-21.7 MPa and the operating temperature of-100-25 ℃.
S22: separating and recovering the tower bottom discharge of the methane rectifying tower 11 in the ethane rectifying tower 12, thereby obtaining ethane with the purity of at least 95% at the tower top of the ethane rectifying tower 12, and inputting the tower bottom discharge of the ethane rectifying tower 12 into the propane rectifying tower; wherein, the tower kettle discharge of the methane rectifying tower is separated and recovered under the operation pressure of 2.6-2.8 MPa and the operation temperature of-10-120 ℃.
S23: separating and recovering the tower bottom discharge of the ethane rectifying tower in a propane rectifying tower 2, so as to obtain propane with the purity of at least 90% at the tower top of the propane rectifying tower 2, and inputting the tower bottom discharge of the propane rectifying tower into a heavy component rectifying tower; wherein, the tower kettle discharge of the ethane rectifying tower is separated and recovered under the operation pressure of 1.5-1.7 MPa and the operation temperature of 40-130 ℃.
S24: separating and recovering the tower bottom discharge of the propane rectifying tower in the heavy component rectifying tower, so as to obtain butane with the purity of at least 90% at the tower top of the heavy component rectifying tower, and obtain light oil with the purity of at least 90% at the tower bottom of the heavy component rectifying tower, wherein the tower bottom discharge of the propane rectifying tower is separated and recovered at the operating pressure of 1.5-1.7 MPa and the operating temperature of 90-170 ℃.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A skid-mounted four-tower well head gas separation and recovery device is characterized by comprising a methane rectifying tower, an ethane rectifying tower, a propane rectifying tower and a heavy component rectifying tower which are communicated with each other; wherein,
the methane rectifying tower is used for receiving gas components of inlet gas subjected to desulfurization, impurity removal and compression refrigeration, the gas components are separated and recovered by the methane rectifying tower at the operating pressure of 1.5-21.7 MPa and the operating temperature of-100-25 ℃, methane with the purity of at least 95% is obtained at the top of the methane rectifying tower, and the tower kettle discharge of the methane rectifying tower is input into the ethane rectifying tower;
separating and recovering the tower bottom discharge of the methane rectifying tower by the ethane rectifying tower at the operating pressure of 2.6-2.8 MPa and the operating temperature of-10-120 ℃, obtaining ethane with the purity of at least 95% at the tower top of the ethane rectifying tower, and inputting the tower bottom discharge of the ethane rectifying tower into the propane rectifying tower;
separating and recovering the tower bottom discharge of the ethane rectifying tower by the propane rectifying tower at the operating pressure of 1.5-1.7 MPa and the operating temperature of 40-130 ℃, obtaining propane with the purity of at least 90% at the tower top of the propane rectifying tower, and inputting the tower bottom discharge of the propane rectifying tower into the heavy component rectifying tower;
separating and recovering the tower bottom discharge of the propane rectifying tower by the heavy component rectifying tower at the operating pressure of 1.5-1.7 MPa and the operating temperature of 90-170 ℃, obtaining butane with the purity of at least 90% at the tower top of the heavy component rectifying tower, and obtaining light oil with the purity of at least 90% at the tower bottom of the heavy component rectifying tower;
the device also comprises a desulfurization reaction separator communicated with the methane rectifying tower; inputting the wellhead gas and alkali liquor into the desulfurization reaction separator for desulfurization and impurity removal;
the method also comprises a membrane separator, wherein the light fraction at the top of the ethane rectifying tower is separated by the membrane separator to remove carbon dioxide, and ethane is obtained.
2. The skid-mounted four-tower well head gas separation and recovery device according to claim 1, wherein a compressor, a heat exchanger and a gas-liquid separation tank are sequentially communicated between the desulfurization reaction separator and the methane rectifying tower so as to perform compression refrigeration on the well head gas subjected to desulfurization and impurity removal.
3. A skid-mounted four-tower separation and recovery method for wellhead gas is characterized by comprising the following steps:
separating and recovering gas components of inlet gas subjected to desulfurization, impurity removal, compression and refrigeration in a methane rectifying tower, so as to obtain methane with the purity of at least 95% at the tower top of the methane rectifying tower, and inputting tower kettle discharge of the methane rectifying tower into an ethane rectifying tower;
separating and recovering the tower bottom discharge of the methane rectifying tower in an ethane rectifying tower so as to obtain ethane with the purity of at least 95% at the tower top of the ethane rectifying tower, and inputting the tower bottom discharge of the ethane rectifying tower into a propane rectifying tower;
separating and recovering the tower bottom discharge of the ethane rectifying tower in the propane rectifying tower, so as to obtain propane with the purity of at least 90% at the tower top of the propane rectifying tower, and inputting the tower bottom discharge of the propane rectifying tower into a heavy component rectifying tower;
separating and recovering the tower bottom discharge of the propane rectifying tower in the heavy component rectifying tower, so as to obtain butane with the purity of at least 90% at the tower top of the heavy component rectifying tower, and obtain light oil with the purity of at least 90% at the tower bottom of the heavy component rectifying tower;
separating and recovering the gas components in the methane rectifying tower at an operating pressure of 1.5-21.7 MPa and an operating temperature of-100-25 ℃; separating and recovering tower kettle discharge of the methane rectifying tower in the ethane rectifying tower at an operating pressure of 2.6-2.8 MPa and an operating temperature of-10-120 ℃;
separating and recovering tower kettle discharge materials of the ethane rectifying tower in the propane rectifying tower at an operating pressure of 1.5-1.7 MPa and an operating temperature of 40-130 ℃;
and separating and recovering the tower kettle discharge of the propane rectifying tower in the heavy component rectifying tower at the operating pressure of 1.5-1.7 MPa and the operating temperature of 90-170 ℃.
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| CN105089606A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Accumulative grading type wellhead desulfurization dosing device |
| CN104307341B (en) * | 2014-11-06 | 2016-08-31 | 上海齐耀螺杆机械有限公司 | A kind of torch gas compression and sulfur removal technology |
| CN108546227A (en) * | 2018-06-28 | 2018-09-18 | 中国石油工程建设有限公司 | A kind of process unit and method of separation ethane and carbon dioxide |
| CN111004657B (en) * | 2019-12-11 | 2021-04-27 | 中国天辰工程有限公司 | Method for comprehensively utilizing oilfield associated gas |
| CN113603051A (en) * | 2021-08-12 | 2021-11-05 | 广泰智造科技(江苏)有限公司 | Skid-mounted gas station and tank body supporting device thereof |
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| CN201391753Y (en) * | 2009-04-08 | 2010-01-27 | 中国石油天然气股份有限公司 | Condensate gas field blow-down gas pressure stabilization recovery device |
| CN201474675U (en) * | 2009-08-21 | 2010-05-19 | 中国船舶重工集团公司第七一一研究所 | Mobile well head gas recycling device |
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| EP0193716A3 (en) * | 1985-01-25 | 1987-06-16 | Air Products And Chemicals, Inc. | Adsorptive separation of methane and carbon dioxide gas mixtures |
| US7467660B2 (en) * | 2005-03-31 | 2008-12-23 | Hce, Llc | Pumped carbon mining methane production process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1942726A (en) * | 2003-09-30 | 2007-04-04 | 奥特洛夫工程有限公司 | Liquefied natural gas processing |
| CN1718680A (en) * | 2004-07-09 | 2006-01-11 | 西南化工研究设计院 | Technology of low temperature separation and concentration coal layer gas to produce methane |
| CN201391753Y (en) * | 2009-04-08 | 2010-01-27 | 中国石油天然气股份有限公司 | Condensate gas field blow-down gas pressure stabilization recovery device |
| CN101602959A (en) * | 2009-07-09 | 2009-12-16 | 天津大学 | Method for increasing the yield of liquefied gas in the downstream separation system of catalytic cracking unit |
| CN201474675U (en) * | 2009-08-21 | 2010-05-19 | 中国船舶重工集团公司第七一一研究所 | Mobile well head gas recycling device |
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