CN216837859U - Oil field associated gas liquefaction separation locomotive group - Google Patents
Oil field associated gas liquefaction separation locomotive group Download PDFInfo
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- CN216837859U CN216837859U CN202220099863.9U CN202220099863U CN216837859U CN 216837859 U CN216837859 U CN 216837859U CN 202220099863 U CN202220099863 U CN 202220099863U CN 216837859 U CN216837859 U CN 216837859U
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Abstract
The utility model relates to an oil field associated gas liquefaction separation moves EMUs for carry out liquefaction separation to the oil field associated gas after purification treatment moves EMUs dehydration decarbonization purification treatment, this oil field associated gas liquefaction separation locomotive group includes liquefaction separator car and cryogen compressor vehicle, installs precooling heat exchanger, cryogenic heat exchanger, heavy hydrocarbon separator, cryogen separator, noncondensable gas separator and heavy hydrocarbon buffer tank on the liquefaction separator car; the refrigerant compressor is arranged on the refrigerant compressor locomotive. The oil field associated gas liquefaction separation motor train unit can separate heavy components such as propane and butane in oil field associated gas to produce heavy hydrocarbon products, can separate light components such as methane in the oil field associated gas to produce Liquefied Natural Gas (LNG) products, reduces emptying of the oil field associated gas, meets the requirements of the state on environmental protection and energy conservation, and creates remarkable economic benefits for enterprises.
Description
Technical Field
The utility model relates to a processing technology field of oil field unloading, specifically say, relate to an oil field associated gas liquefaction separation moves EMUs.
Background
The oilfield associated gas is natural gas which is discharged in an entrained manner in the oilfield exploitation process, is rich in hydrocarbons such as methane, ethane and propane, and is a recyclable resource. Because the gas quantity of the associated gas in the oil field is less and unstable, the associated gas is not suitable for pipeline transportation, a torch is generally directly discharged, natural gas resources are wasted, environmental pollution is caused, and the associated 'double-carbon' control requirements of the country are not met.
Aiming at the oil field associated gas, a moving vehicle set system for recovering and processing the oil field associated gas is needed to be developed to recover the oil field associated gas, heavy hydrocarbon and liquefied natural gas products are produced, the value of an enterprise can be created, the environmental protection requirement is met, and at present, no liquefied separation moving motor train set suitable for the oil field associated gas recovery processing moving vehicle set system exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide an oil field associated gas liquefaction separation that structural design is reasonable, the system is perfect and move EMUs.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides an oil field associated gas liquefaction separation moves EMUs for carry out the liquefaction separation to the oil field associated gas after purification treatment moves EMUs dehydration decarbonization purification treatment, its characterized in that: the oil field associated gas liquefaction separation moving vehicle set comprises a liquefaction separation vehicle; the liquefaction separation vehicle is provided with a precooling heat exchanger, a cryogenic heat exchanger, a heavy hydrocarbon separator, a noncondensable gas separator and a heavy hydrocarbon buffer tank; the heavy hydrocarbon separator and the noncondensable gas separator are respectively provided with a gas inlet, a top gas outlet and a bottom liquid outlet; a channel A1, a channel A2, a channel A3 and a channel A4 are arranged in the precooling heat exchanger; a channel B1, a channel B2 and a channel B3 are arranged in the cryogenic heat exchanger; the channel A3 of the precooling heat exchanger is used for introducing purified oilfield associated gas, the outlet end of the channel A3 is communicated with the gas inlet of the heavy hydrocarbon separator, the bottom liquid outlet of the heavy hydrocarbon separator is communicated with a heavy hydrocarbon buffer tank through a channel A4 of the precooling heat exchanger, the top gas outlet of the heavy hydrocarbon buffer tank is communicated with a purification treatment motor train unit, the top gas outlet of the heavy hydrocarbon separator is communicated with the gas inlet of the noncondensable gas separator through a channel B3 of the cryogenic heat exchanger, the bottom liquid outlet of the noncondensable gas separator is communicated with an LNG product conveying pipeline, and the top gas outlet of the noncondensable gas separator is communicated with an external purge gas conveying pipeline after sequentially passing through a channel B2 of the cryogenic heat exchanger and a channel A2 of the precooling heat exchanger; the purification processing mobile motor train unit is provided with an analysis gas pipeline, the output tail end of the analysis gas pipeline is communicated with the inlet end of a channel A1 of the precooling heat exchanger, a channel A1 is communicated with a channel B1, and a channel B1 is communicated with an LNG product conveying pipeline.
Preferably, the oil field associated gas liquefaction separation moving motor train unit further comprises a refrigerant compressor locomotive, wherein a refrigerant compressor is mounted on the refrigerant compressor locomotive, a refrigerant separator is further mounted on the liquefaction separation locomotive, and a channel A5 and a channel A6 are further arranged in the precooling heat exchanger; a channel B4 and a channel B5 are also arranged in the cryogenic heat exchanger; the refrigerant outlet end of the refrigerant compressor is communicated with the inlet end of the refrigerant separator through a channel A5, the liquid outlet at the bottom of the refrigerant separator is communicated with the refrigerant inlet end of the refrigerant compressor through a channel A6, and the air outlet end at the top of the refrigerant separator is communicated with the refrigerant inlet end of the refrigerant compressor through a channel B4, a channel B5 and a channel A6 in sequence.
Preferably, a channel B1 and a channel B2 of the cryogenic heat exchanger are freezing decarbonization channels, a channel A1 and a channel B1 are communicated through a first four-way change-over switch valve, and a channel B1 and an LNG product conveying pipeline are communicated through a second four-way change-over switch valve; the outlet end of the channel A1 is connected with the first port of the first four-way change-over switch valve, the inlet end of the channel B1 is connected with the second port of the first four-way change-over switch valve, the third port of the first four-way change-over switch valve is connected with the channel A2, and the fourth port of the first four-way change-over switch valve is connected with the channel B2; the outlet end of the channel B1 is connected with the first port of the second four-way change-over switch valve, the second port of the second four-way change-over switch valve is connected with the LNG product conveying pipeline, the third port of the second four-way change-over switch valve is connected with the channel B2, and the fourth port of the second four-way change-over switch valve is connected with the top gas outlet of the non-condensation gas separator.
Preferably, the refrigerant compressor is a screw compressor.
Preferably, the precooling heat exchanger and the cryogenic heat exchanger adopt aluminum plate-fin heat exchangers.
Compared with the prior art, the utility model, have following advantage and effect: the oil field associated gas liquefaction separation motor train unit can separate heavy components such as propane and butane in oil field associated gas to produce heavy hydrocarbon products, can separate light components such as methane in the oil field associated gas to produce Liquefied Natural Gas (LNG) products, reduces emptying of the oil field associated gas, meets the requirements of the state on environmental protection and energy conservation, and creates remarkable economic benefits for enterprises.
Drawings
In order to illustrate the embodiments of the present invention or the solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Description of reference numerals:
a precooling heat exchanger 11; a cryogenic heat exchanger 12; a heavy hydrocarbon separator 13; a non-condensable gas separator 14; a refrigerant separator 15;
a heavy hydrocarbon surge tank 16; a refrigerant compressor 17;
moving the motor train unit 19 through purification treatment; a liquefaction separator car 20; a refrigerant compressor vehicle 21;
a first four-way switching valve 22; a second four-way selector valve 23;
a desorption gas line 28; LNG product transfer lines 29; an external purge gas delivery line 30.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
See fig. 1.
The embodiment discloses a motor train unit for liquefying, separating and transferring oil field associated gas, which is used for liquefying and separating the oil field associated gas after the dehydration, decarbonization and purification treatment of a purification treatment motor train unit 19, separating heavy components such as propane and butane in the oil field associated gas to produce heavy hydrocarbon products, and separating light components such as methane in the oil field associated gas to produce Liquefied Natural Gas (LNG) products.
This oil field associated gas liquefaction separation locomotive assembly includes two portable, sled dress formula's group of cars: the system comprises a liquefaction separation vehicle 20 and a refrigerant compression locomotive 21, wherein the liquefaction separation vehicle 20 is provided with a precooling heat exchanger 11, a cryogenic heat exchanger 12, a heavy hydrocarbon separator 13, a noncondensable gas separator 14, a refrigerant separator 15, a heavy hydrocarbon buffer tank 16, and a pipeline, a valve and the like matched with the heavy hydrocarbon buffer tank; the refrigerant compressor 17 and a pipe etc. associated therewith are mounted on the refrigerant compressor vehicle 21.
In this embodiment, the refrigerant compressor 17 is a screw compressor. The precooling heat exchanger 11 and the deep cooling heat exchanger 12 adopt aluminum plate-fin heat exchangers, so that the efficiency of the low-temperature heat exchanger is improved, the size of equipment is reduced, and prying manufacturing and integration of the mobile motor train unit are facilitated.
In this embodiment, the heavy hydrocarbon separator 13 and the noncondensable gas separator 14 both have a gas inlet, a top gas outlet and a bottom liquid outlet; a channel A1, a channel A2, a channel A3, a channel A4, a channel A5 and a channel A6 are arranged in the precooling heat exchanger 11; channel B1, channel B2, channel B3, channel B4 and channel B5 are arranged in the cryogenic heat exchanger 12, wherein channel B1 and channel B2 are freezing decarbonization channels.
In this embodiment, the oil field associated gas that purifies that the motor train unit 19 was obtained lets in passageway A3 of precooling heat exchanger 11 in purification treatment, the exit end of passageway A3 and the air inlet switch-on of heavy hydrocarbon separator 13, the bottom liquid outlet of heavy hydrocarbon separator 13 is put through to heavy hydrocarbon buffer tank 16 through passageway a4 of precooling heat exchanger 11, the top gas outlet of heavy hydrocarbon buffer tank 16 and the oil field associated gas of purification treatment motor train unit 19 that admits air the top and is connected, the gas that heavy hydrocarbon buffer tank 16 separates is got back to purification treatment motor train unit 19 again and is carried out circulation purification.
In this embodiment, the top gas outlet of the heavy hydrocarbon separator 13 is communicated with the gas inlet of the noncondensable gas separator 14 through a channel B3 of the cryogenic heat exchanger 12, and the bottom liquid outlet of the noncondensable gas separator 14 is communicated with the LNG product conveying pipeline 29. The top air outlet of the noncondensable gas separator 14 is communicated with an external purge gas conveying pipeline 30 after passing through a channel B2 of the cryogenic heat exchanger 12 and a channel A2 of the precooling heat exchanger 11 in sequence, and the purge gas provides fuel for the heat conduction furnace.
In this embodiment, the purification-treated mobile electric vehicle 19 has a desorption gas line 28, and the regeneration gas in the desorption gas line 28 is a gas generated after the carbon dioxide adsorption tower is regenerated, and is rich in a large amount of carbon dioxide. The output tail end of the desorption gas pipeline 28 is communicated with the inlet end of a channel A1 of the precooling heat exchanger 11, a channel A1 is communicated with a channel B1, and a channel B1 is communicated with an LNG product conveying pipeline 29; the refrigerant outlet end of the refrigerant compressor 17 is connected to the inlet end of the refrigerant separator 15 through a channel a5, the liquid outlet at the bottom of the refrigerant separator 15 is connected to the refrigerant inlet end of the refrigerant compressor 17 through a channel a6, and the gas outlet end at the top of the refrigerant separator 15 is connected to the refrigerant inlet end of the refrigerant compressor 17 through a channel B4, a channel B5 and a channel a6 in sequence.
In this embodiment, the channel a1 and the channel B1 are connected through a first four-way selector valve 22, and the channel B1 and the LNG product conveying pipeline 29 are connected through a second four-way selector valve 23; the outlet end of the channel A1 is connected with the first port of the first four-way change-over switch valve 22, the inlet end of the channel B1 is connected with the second port of the first four-way change-over switch valve 22, the third port of the first four-way change-over switch valve 22 is connected with the channel A2, and the fourth port of the first four-way change-over switch valve 22 is connected with the channel B2; the outlet end of the channel B1 is connected with the first port of the second four-way change-over switch valve 23, the second port of the second four-way change-over switch valve 23 is connected with the LNG product conveying pipeline 29, the third port of the second four-way change-over switch valve 23 is connected with the channel B2, and the fourth port of the second four-way change-over switch valve 23 is connected with the top air outlet of the noncondensable gas separator 14.
The working method of the oil field associated gas liquefaction separation moving motor train unit comprises the following steps:
firstly, purified oilfield associated gas enters a precooling heat exchanger 11, is cooled in the precooling heat exchanger 11 and then enters a heavy hydrocarbon separator 13, so that a large amount of heavy components are separated; the gas from the top of the heavy hydrocarbon separator 13 passes through a cryogenic heat exchanger 12, is cooled in the cryogenic heat exchanger 12 and then enters an incondensable gas separator 14, and incondensable gas rich in nitrogen is separated; the gas from the noncondensable gas separator 14 is used as purge gas, and is reheated by the cryogenic heat exchanger 12 and the precooling heat exchanger 11 in sequence and then goes out of the boundary to supplement fuel gas for the heat-conducting oil furnace;
then, the heavy component liquid separated from the heavy hydrocarbon separator 13 is subjected to pressure reduction through a throttle valve, and then is reheated through a precooling heat exchanger 11, and then is sent to a heavy hydrocarbon buffer tank 16, and the liquid separated from the heavy hydrocarbon buffer tank 16 is sent out of the world as a heavy hydrocarbon product; the gas separated from the heavy hydrocarbon buffer tank 16 is purified and moved to the motor train unit 19 for cyclic recovery and liquefaction; the liquid separated by the noncondensable gas separator 14 is used as a liquefied natural gas product to go out of the world;
secondly, the analysis gas from the motor train unit 19 after purification treatment firstly enters the precooling heat exchanger 11 for cooling, then enters the cryogenic heat exchanger 12 through the four-way switching valve 22 for freezing carbon dioxide, the carbon dioxide is frozen in the channel B1 or the channel B2 in the cryogenic heat exchanger 12, and the separated analysis gas is taken as a liquefied natural gas product and goes out of the country through the four-way switching valve 23.
In the present embodiment, the specific method for freezing carbon dioxide in the channel B1 or the channel B2 in the cryogenic heat exchanger 12 is as follows: the low-pressure desorption regeneration gas output by the purification treatment mobile electric train unit 19 is firstly cooled to-56 ℃ through a channel A1 of the precooling heat exchanger 11 and then enters a channel B1 of the cryogenic heat exchanger 12 to be continuously cooled and cooled, solid carbon dioxide is separated out, the separation of the carbon dioxide is realized, and the residual regeneration gas is changed into a liquefied natural gas product; when the carbon dioxide precipitated in the passage B1 reaches a certain amount, the freezing passage is switched by switching the four-way switching valve 22, the carbon dioxide is frozen in the passage B2, the non-condensable gas separated by the non-condensable gas separator 14 from the carbon dioxide frozen in the passage B1 and the passage B2 returns to the freezing passage B1 and the passage B2, the carbon dioxide is desorbed through reheating, and the desorbed non-condensable gas rich in the carbon dioxide is used as purge gas to be sent to the heat-conducting oil furnace to be used as fuel gas.
In this embodiment, the pre-cooling heat exchanger 11 and the cryogenic heat exchanger 12 are subjected to circulating refrigeration by the refrigerant compressor vehicle 21, and the specific circulating refrigeration method is as follows: the mixed refrigerant is composed of nitrogen, methane, ethylene, propane, isobutane, isopentane and the like, the mixed refrigerant is subjected to pressure boosting and cooling through a refrigerant compressor 17 and directly enters a precooling heat exchanger 11, the mixed refrigerant enters a refrigerant separator 15 after being cooled by the precooling heat exchanger 11, separated liquid is subjected to pressure reduction and temperature reduction through a first-stage throttle valve and then returns to the precooling heat exchanger 11 to provide cold energy for the precooling heat exchanger 11, gas separated from the refrigerant separator 15 is cooled through a cryogenic heat exchanger 12 to become liquid, the liquid is subjected to pressure reduction and temperature reduction through a second-stage throttle valve and then returns to the cryogenic heat exchanger 12 to provide cold energy for the cryogenic heat exchanger 12, low-pressure refrigerant is mixed with liquid separated from the refrigerant separator 15 after passing through the cryogenic heat exchanger 12 and then is subjected to rewarming through the refrigerant compressor 11 to pressure boosting and cooling again, and circulating refrigeration is achieved.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above contents described in the present specification are merely illustrative of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (5)
1. The utility model provides an oil field associated gas liquefaction separation moves EMUs for carry out the liquefaction separation to the oil field associated gas that purification treatment moved EMUs dehydration decarbonization purification treatment after, its characterized in that: the oil field associated gas liquefaction separation motor train unit comprises a liquefaction separation vehicle (20); a precooling heat exchanger (11), a cryogenic heat exchanger (12), a heavy hydrocarbon separator (13), a noncondensable gas separator (14) and a heavy hydrocarbon buffer tank (16) are arranged on the liquefaction separation vehicle (20); the heavy hydrocarbon separator (13) and the non-condensing gas separator (14) are respectively provided with a gas inlet, a top gas outlet and a bottom liquid outlet;
a channel A1, a channel A2, a channel A3 and a channel A4 are arranged in the precooling heat exchanger (11);
a channel B1, a channel B2 and a channel B3 are arranged in the cryogenic heat exchanger (12);
a channel A3 of the precooling heat exchanger (11) is used for introducing purified oilfield associated gas, the outlet end of a channel A3 is communicated with the gas inlet of a heavy hydrocarbon separator (13), the bottom liquid outlet of the heavy hydrocarbon separator (13) is communicated with a heavy hydrocarbon buffer tank (16) through a channel A4 of the precooling heat exchanger (11), the top gas outlet of the heavy hydrocarbon buffer tank (16) is communicated with a purification treatment motor train moving unit, the top gas outlet of the heavy hydrocarbon separator (13) is communicated with the gas inlet of an uncondensed gas separator (14) through a channel B3 of a cryogenic heat exchanger (12), the bottom liquid outlet of the uncondensed gas separator (14) is communicated with an LNG product conveying pipeline (29), and the top gas outlet of the uncondensed gas separator (14) is communicated with an external purge gas conveying pipeline (30) after sequentially passing through a channel B2 of the cryogenic heat exchanger (12) and a channel A2 of the precooling heat exchanger (11);
the purification processing mobile motor train unit is provided with a desorption gas pipeline (28), the output tail end of the desorption gas pipeline (28) is communicated with the inlet end of a channel A1 of the precooling heat exchanger (11), a channel A1 is communicated with a channel B1, and a channel B1 is communicated with an LNG product conveying pipeline (29).
2. The oilfield associated gas liquefaction separation motor train unit according to claim 1, wherein: the oil field associated gas liquefaction separation moving motor train unit further comprises a refrigerant compressor locomotive (21), wherein a refrigerant compressor (17) is installed on the refrigerant compressor locomotive (21), a refrigerant separator (15) is also installed on the liquefaction separation locomotive (20), and a channel A5 and a channel A6 are also arranged in the precooling heat exchanger (11); a channel B4 and a channel B5 are also arranged in the cryogenic heat exchanger (12); the refrigerant outlet end of the refrigerant compressor (17) is communicated with the inlet end of the refrigerant separator (15) through a channel A5, the liquid outlet at the bottom of the refrigerant separator (15) is communicated with the refrigerant inlet end of the refrigerant compressor (17) through a channel A6, and the gas outlet end at the top of the refrigerant separator (15) is communicated with the refrigerant inlet end of the refrigerant compressor (17) through a channel B4, a channel B5 and a channel A6 in sequence.
3. The oilfield associated gas liquefaction separation motor train unit of claim 1, wherein: a channel B1 and a channel B2 of the cryogenic heat exchanger (12) are refrigeration and decarbonization channels, a channel A1 and a channel B1 are communicated through a first four-way switching valve (22), and a channel B1 and an LNG product conveying pipeline (29) are communicated through a second four-way switching valve (23); the outlet end of the channel A1 is connected with the first port of the first four-way change-over switch valve (22), the inlet end of the channel B1 is connected with the second port of the first four-way change-over switch valve (22), the third port of the first four-way change-over switch valve (22) is connected with the channel A2, and the fourth port of the first four-way change-over switch valve (22) is connected with the channel B2; the outlet end of the channel B1 is connected with the first port of the second four-way change-over switch valve (23), the second port of the second four-way change-over switch valve (23) is connected with the LNG product conveying pipeline (29), the third port of the second four-way change-over switch valve (23) is connected with the channel B2, and the fourth port of the second four-way change-over switch valve (23) is connected with the top gas outlet of the noncondensable gas separator (14).
4. The oilfield associated gas liquefaction separation motor train unit according to claim 2, wherein: the refrigerant compressor (17) adopts a screw compressor.
5. The oilfield associated gas liquefaction separation motor train unit of claim 1, wherein: the precooling heat exchanger (11) and the deep cooling heat exchanger (12) adopt aluminum plate-fin heat exchangers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220099863.9U CN216837859U (en) | 2022-01-13 | 2022-01-13 | Oil field associated gas liquefaction separation locomotive group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220099863.9U CN216837859U (en) | 2022-01-13 | 2022-01-13 | Oil field associated gas liquefaction separation locomotive group |
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| CN216837859U true CN216837859U (en) | 2022-06-28 |
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| CN202220099863.9U Active CN216837859U (en) | 2022-01-13 | 2022-01-13 | Oil field associated gas liquefaction separation locomotive group |
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