CN220257606U - Natural gas PSA decarbonization device - Google Patents
Natural gas PSA decarbonization device Download PDFInfo
- Publication number
- CN220257606U CN220257606U CN202321420050.6U CN202321420050U CN220257606U CN 220257606 U CN220257606 U CN 220257606U CN 202321420050 U CN202321420050 U CN 202321420050U CN 220257606 U CN220257606 U CN 220257606U
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- branch pipe
- adsorption tower
- valve body
- pipe
- air outlet
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000003345 natural gas Substances 0.000 title claims abstract description 38
- 238000005262 decarbonization Methods 0.000 title claims description 7
- 238000001179 sorption measurement Methods 0.000 claims abstract description 83
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 44
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 22
- 239000001569 carbon dioxide Substances 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 11
- 239000003463 adsorbent Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000005261 decarburization Methods 0.000 abstract description 5
- 239000003208 petroleum Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Landscapes
- Separation Of Gases By Adsorption (AREA)
Abstract
The utility model relates to the technical field of marine petroleum equipment, and particularly discloses a natural gas PSA decarburization device which comprises a first adsorption tower and a second adsorption tower, wherein an air inlet pipe, a first air outlet pipe and a second air outlet pipe are arranged outside the first adsorption tower and the second adsorption tower, a first branch pipe is communicated with the bottom of the first adsorption tower, a second branch pipe is communicated with the bottom of the second adsorption tower, the first branch pipe and the second branch pipe are communicated with the air inlet pipe through a first valve body, the first branch pipe and the second branch pipe are mutually communicated through a third valve body, and the first branch pipe and the second branch pipe are communicated with the first air outlet pipe through a second valve body.
Description
Technical Field
The utility model relates to the technical field of offshore oil equipment, in particular to a natural gas PSA decarbonization device.
Background
Natural gas produced by offshore oil fields contains a large amount of carbon dioxide, and the carbon dioxide content can reach more than 40%. If the gas mixture is transported from the ocean platform to the land and then separated for use, the process can generate a great deal of transportation cost.
In order to reduce the transportation cost, the natural gas decarburization is often carried out on an ocean platform, and the types of the natural gas decarburization devices which can be installed on the ocean platform are fewer at present, so that the natural gas decarburization device for the ocean platform is necessary to be provided, so that the problem of natural gas decarburization on the ocean platform is solved, and the transportation cost is reduced.
Disclosure of Invention
The utility model aims to solve the problem of decarbonizing natural gas on an ocean platform and provides a natural gas PSA decarbonizing device.
The technical scheme of the utility model is as follows:
the utility model provides a natural gas PSA decarbonization device, includes first adsorption tower and second adsorption tower, the outside of first adsorption tower and second adsorption tower is equipped with intake pipe, first outlet duct and second outlet duct, and the bottom intercommunication of first adsorption tower has first branch pipe, and the bottom intercommunication of second adsorption tower has the second branch pipe, and first branch pipe and second branch pipe communicate with the intake pipe through first valve body, and first branch pipe and second branch pipe communicate with each other through the third valve body, and first branch pipe and second branch pipe communicate with first outlet duct through the second valve body;
the top of the first adsorption tower is communicated with a third branch pipe, the top of the second adsorption tower is communicated with a fourth branch pipe, the third branch pipe and the fourth branch pipe are communicated with a second air outlet pipe through a fourth valve body, and the third branch pipe and the fourth branch pipe are mutually communicated through a fifth valve body.
Further, the first outlet pipe is located the bottom of first adsorption tower and second adsorption tower, and the second outlet pipe is located the top of first adsorption tower and second adsorption tower.
Further, the first valve body comprises two independent valve bodies, wherein one valve body controls the communication between the first branch pipe and the air inlet pipe, and the other valve body controls the communication between the second branch pipe and the air inlet pipe.
Further, the third valve body comprises two independent valve bodies, wherein one valve body controls the communication between the first branch pipe and the first air outlet pipe, and the other valve body controls the communication between the second branch pipe and the first air outlet pipe.
Further, the fourth valve body comprises two independent valve bodies, wherein one valve body controls the communication between the third branch pipe and the second air outlet pipe, and the other valve body controls the communication between the fourth branch pipe and the second air outlet pipe.
Further, the air inlet pipe is used for introducing natural gas mixed gas produced by offshore oil fields.
Further, the first air outlet is used for discharging carbon dioxide gas.
Further, the second air outlet pipe is used for discharging natural gas.
Furthermore, the first adsorption tower and the second adsorption tower both adopt a PSA pressure swing adsorption technology, and the inside of the first adsorption tower and the second adsorption tower are filled with adsorbents for adsorbing carbon dioxide.
According to the natural gas PSA decarbonization device, the PSA pressure swing adsorption technology is utilized, the first adsorption tower and the second adsorption tower are used for separating natural gas from carbon dioxide, the first adsorption tower and the second adsorption tower are used alternately in a matched mode for realizing two processes of adsorption and analytic release of carbon dioxide, and then natural gas is discharged through the second gas outlet pipe at the top, and carbon dioxide is discharged through the first gas outlet pipe at the bottom.
Drawings
FIG. 1 is a structural reference diagram of the present utility model;
FIG. 2 is a reference diagram of the usage status of the present utility model;
fig. 3 is a reference diagram of a use state of the present utility model.
Reference numerals: 1. a first adsorption tower; 2. a second adsorption tower; 3. an air inlet pipe; 4. a first air outlet pipe; 5. a second air outlet pipe; 6. a first branch pipe; 7. a second branch pipe; 8. a first valve body; 9. a second valve body; 10. a third valve body; 11. a third branch pipe; 12. a fourth branch pipe; 13. a fourth valve body; 14. and a fifth valve body.
Detailed Description
In order to make the technical means, technical features, objects and technical effects of the present utility model easy to understand, the present utility model will be further described with reference to the specific drawings.
Embodiment one:
as shown in fig. 1, this embodiment provides a natural gas PSA decarbonizing device, in which a front view of a device is shown, a first air outlet pipe 4 and a second air outlet pipe 5 and an air inlet pipe 3 shown in the outside are all located outside a tower body, and include a first adsorption tower 1 and a second adsorption tower 2, the outside of the first adsorption tower 1 and the second adsorption tower 2 is provided with an air inlet pipe 3, a first air outlet pipe 4 and a second air outlet pipe 5, the bottom of the first adsorption tower 1 is communicated with a first branch pipe 6, the bottom of the second adsorption tower 2 is communicated with a second branch pipe 7, the first branch pipe 6 and the second branch pipe 7 are communicated with the air inlet pipe 3 through a first valve body 8, the first branch pipe 6 and the second branch pipe 7 are mutually communicated with the first air outlet pipe 4 through a third valve body 10, and the first branch pipe 6 and the second branch pipe 7 are communicated with the first air outlet pipe 4 through a second valve body 9;
the top of the first adsorption tower 1 is communicated with a third branch pipe 11, the top of the second adsorption tower 2 is communicated with a fourth branch pipe 12, the third branch pipe 11 and the fourth branch pipe 12 are communicated with the second air outlet pipe 5 through a fourth valve body 13, and the third branch pipe 11 and the fourth branch pipe 12 are mutually communicated through a fifth valve body 14.
Preferably, the first air outlet pipe 4 is positioned at the bottoms of the first adsorption tower 1 and the second adsorption tower 2, and the second air outlet pipe 5 is positioned at the tops of the first adsorption tower 1 and the second adsorption tower 2.
Preferably, the first valve body 8 comprises two separate valve bodies, one of which controls the communication of the first branch pipe 6 with the air intake pipe 3 and the other of which controls the communication of the second branch pipe 7 with the air intake pipe 3.
Preferably, the third valve body 10 comprises two independent valve bodies, wherein one valve body controls the communication between the first branch pipe 6 and the first air outlet pipe 4, and the other valve body controls the communication between the second branch pipe 7 and the first air outlet pipe 4.
Preferably, the fourth valve body 13 comprises two independent valve bodies, wherein one valve body controls the communication between the third branch pipe 11 and the second air outlet pipe 5, and the other valve body controls the communication between the fourth branch pipe 12 and the second air outlet pipe 5.
Preferably, the air inlet pipe 3 is used for introducing natural gas mixed gas produced by offshore oil fields.
Preferably, the first gas outlet is for discharging carbon dioxide gas.
Preferably, the second air outlet pipe 5 is used for discharging natural gas.
Preferably, the first adsorption tower 1 and the second adsorption tower 2 both adopt PSA pressure swing adsorption technology, and the inside of both are filled with adsorbents for adsorbing carbon dioxide.
Preferably, the air inlet pipe 3, the first air outlet pipe 4, the second air outlet pipe 5, the first branch pipe 6, the second branch pipe 7, the third branch pipe 11 and the fourth branch pipe 12 are all of steel pipe welding structures, the valve body is in threaded connection with each pipeline, the first adsorption tower 1 is respectively connected with the first branch pipe 6 and the third branch pipe 11 through flanges, and the second adsorption tower 2 is respectively connected with the second branch pipe 7 and the fourth branch pipe 12 through flanges.
The adsorption tower is filled with adsorbent before the equipment works, and the specific working process is as follows:
as shown in fig. 2, the first adsorption tower 1 adsorbs stage a: at the moment, a fourth valve body 13 for controlling the third branch pipe 11 to be communicated with the second air outlet pipe 5, a first valve body 8 for controlling the first branch pipe 6 to be communicated with the air inlet pipe 3 and a second valve body 9 for controlling the second branch pipe 7 to be communicated with the first air outlet pipe 4 are opened, and the rest valve bodies are closed; when the high-pressure mixed gas (about 1.6 MPa) enters the first adsorption tower 1 from the air inlet pipe 3 through the first valve body 8 for controlling the first branch pipe 6 to be communicated with the air inlet pipe 3, the adsorbent in the first adsorption tower 1 adsorbs carbon dioxide, and the high-purity natural gas is discharged from the second air outlet pipe 5 through the fourth valve body 13 for controlling the third branch pipe 11 to be communicated with the second air outlet pipe 5; the adsorbent in the second adsorption tower 2 desorbs the carbon dioxide, and the carbon dioxide is discharged through a second valve body 9 which controls the second branch pipe 7 to be communicated with the first air outlet pipe 4.
Equalizing pressure stage B of two adsorption towers: the third valve body 10 is opened, and the other valve bodies are closed, so that the air pressures in the two adsorption towers are equalized.
As shown in fig. 3, the first adsorption column 1 analyzes stage C: at this time, a fourth valve body 13 for controlling the fourth branch pipe 12 to be communicated with the second air outlet, a first valve body 8 for controlling the second branch pipe 7 to be communicated with the air inlet pipe 3, and a second valve body 9 for controlling the first branch pipe 6 to be communicated with the first air outlet pipe 4 are opened, and other valve bodies are closed. At the moment, the air pressure in the first adsorption tower 1 suddenly drops, the adsorbent desorbs carbon dioxide, the carbon dioxide is discharged through a second valve body 9 which is communicated with the first air outlet pipe 4 by controlling the first branch pipe 6, and the carbon dioxide is reinjected to the bottom of a well through next equipment; meanwhile, high-pressure natural gas mixture enters the second adsorption tower 2 through the air inlet pipe 3 and the first valve body 8 which is communicated with the air inlet pipe 3 through the second branch pipe 7, and the second adsorption tower 2 is in a carbon dioxide adsorption stage.
Thus, the high-purity natural gas with stable air pressure can be obtained by repeating A, B, C stages, and the qualified natural gas is transported in other modes; carbon dioxide is reinjected downhole by other pressurizing means.
According to the natural gas PSA decarbonization device, the PSA pressure swing adsorption technology is utilized, the separation of natural gas and carbon dioxide is realized by using the first adsorption tower 1 and the second adsorption tower 2, the adsorption and the analytic release of the carbon dioxide are realized by alternately matching the first adsorption tower 1 and the second adsorption tower 2, the natural gas is further discharged through the second air outlet pipe 5 at the top, and the carbon dioxide is discharged through the first air outlet pipe 4 at the bottom.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Equivalent changes and modifications of the utility model are intended to fall within the scope of the present utility model.
Claims (9)
1. A natural gas PSA decarbonization device, characterized in that: the device comprises a first adsorption tower (1) and a second adsorption tower (2), wherein an air inlet pipe (3), a first air outlet pipe (4) and a second air outlet pipe (5) are arranged outside the first adsorption tower (1) and the second adsorption tower (2), a first branch pipe (6) is communicated with the bottom of the first adsorption tower (1), a second branch pipe (7) is communicated with the bottom of the second adsorption tower (2), the first branch pipe (6) and the second branch pipe (7) are communicated with the air inlet pipe (3) through a first valve body (8), the first branch pipe (6) and the second branch pipe (7) are mutually communicated through a third valve body (10), and the first branch pipe (6) and the second branch pipe (7) are communicated with the first air outlet pipe (4) through a second valve body (9);
the top of the first adsorption tower (1) is communicated with a third branch pipe (11), the top of the second adsorption tower (2) is communicated with a fourth branch pipe (12), the third branch pipe (11) and the fourth branch pipe (12) are communicated with the second air outlet pipe (5) through a fourth valve body (13), and the third branch pipe (11) and the fourth branch pipe (12) are mutually communicated through a fifth valve body (14).
2. A natural gas PSA decarbonizing apparatus according to claim 1, wherein: the first air outlet pipe (4) is positioned at the bottoms of the first adsorption tower (1) and the second adsorption tower (2), and the second air outlet pipe (5) is positioned at the tops of the first adsorption tower (1) and the second adsorption tower (2).
3. A natural gas PSA decarbonizing apparatus according to claim 1, wherein: the first valve body (8) comprises two independent valve bodies, wherein one valve body controls the communication between the first branch pipe (6) and the air inlet pipe (3), and the other valve body controls the communication between the second branch pipe (7) and the air inlet pipe (3).
4. A natural gas PSA decarbonizing apparatus according to claim 1, wherein: the third valve body (10) comprises two independent valve bodies, wherein one valve body controls the communication between the first branch pipe (6) and the first air outlet pipe (4), and the other valve body controls the communication between the second branch pipe (7) and the first air outlet pipe (4).
5. A natural gas PSA decarbonizing apparatus according to claim 1, wherein: the fourth valve body (13) comprises two independent valve bodies, wherein one valve body controls the communication between the third branch pipe (11) and the second air outlet pipe (5), and the other valve body controls the communication between the fourth branch pipe (12) and the second air outlet pipe (5).
6. A natural gas PSA decarbonizing apparatus according to claim 1, wherein: the air inlet pipe (3) is used for introducing natural gas mixed gas produced by an offshore oil field.
7. A natural gas PSA decarbonizing apparatus according to claim 1, wherein: the first air outlet is used for discharging carbon dioxide gas.
8. A natural gas PSA decarbonizing apparatus according to claim 1, wherein: the second air outlet pipe (5) is used for discharging natural gas.
9. A natural gas PSA decarbonizing apparatus according to claim 1, wherein: the first adsorption tower (1) and the second adsorption tower (2) adopt PSA pressure swing adsorption technology, and the inside of the first adsorption tower and the inside of the second adsorption tower are filled with adsorbents for adsorbing carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321420050.6U CN220257606U (en) | 2023-06-06 | 2023-06-06 | Natural gas PSA decarbonization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321420050.6U CN220257606U (en) | 2023-06-06 | 2023-06-06 | Natural gas PSA decarbonization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220257606U true CN220257606U (en) | 2023-12-29 |
Family
ID=89315675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321420050.6U Active CN220257606U (en) | 2023-06-06 | 2023-06-06 | Natural gas PSA decarbonization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220257606U (en) |
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2023
- 2023-06-06 CN CN202321420050.6U patent/CN220257606U/en active Active
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