CN216236881U - Device for removing sulfide and recovering carbon dioxide in coal gas - Google Patents
Device for removing sulfide and recovering carbon dioxide in coal gas Download PDFInfo
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- CN216236881U CN216236881U CN202122874928.0U CN202122874928U CN216236881U CN 216236881 U CN216236881 U CN 216236881U CN 202122874928 U CN202122874928 U CN 202122874928U CN 216236881 U CN216236881 U CN 216236881U
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- carbon dioxide
- unit
- coal gas
- gas compression
- hydrogen sulfide
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 206
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 105
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 103
- 239000003034 coal gas Substances 0.000 title claims abstract description 47
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 title claims description 10
- 239000007789 gas Substances 0.000 claims abstract description 35
- 230000006835 compression Effects 0.000 claims abstract description 31
- 238000007906 compression Methods 0.000 claims abstract description 31
- 238000010521 absorption reaction Methods 0.000 claims abstract description 28
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 23
- 238000003795 desorption Methods 0.000 claims abstract description 22
- 150000003568 thioethers Chemical class 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims 1
- 239000012535 impurity Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a device for removing sulfides in coal gas and recovering carbon dioxide, which comprises a coal gas compression unit, a hydrogen sulfide removal unit, a carbon dioxide absorption unit, a carbon dioxide desorption unit, a carbon dioxide enriched gas compression unit and a carbon dioxide rectification liquefaction unit; the coal gas compression unit is connected with the coal gas inlet and is used for compressing coal gas; the hydrogen sulfide removal unit is connected with a coal gas outlet of the coal gas compression unit; the carbon dioxide absorption unit is connected with a hydrogen sulfide removal gas outlet of the hydrogen sulfide removal unit; the carbon dioxide desorption unit is connected with a carbon dioxide absorption product outlet of the carbon dioxide absorption unit; the carbon dioxide enriched gas compression unit is connected with a carbon dioxide enriched gas outlet of the carbon dioxide desorption unit; the carbon dioxide rectifying and liquefying unit is connected with a carbon dioxide enriched gas compression outlet of the carbon dioxide enriched gas compression unit. The device has high removal rate of carbon dioxide in the coal gas and high product purity.
Description
Technical Field
The utility model relates to a device for removing sulfide and recovering carbon dioxide in coal gas, belonging to the technical field of carbon dioxide capture.
Background
The iron-making process produces a large amount of coal gas, and the main components of the coal gas are CO and H2、CO2And N2And contains trace amounts of organic sulfides and hydrogen sulfide. The ironmaking coal gas contains trace impurities such as organic sulfide and hydrogen sulfide which have similar physical and chemical properties with carbon dioxide, and CO absorbed and desorbed is caused2The enriched gas is mixed with impurities such as organic sulfide and hydrogen sulfide, i.e. carbon dioxide in the recovered gas, and the sulfide in the enriched gas is often not removed, so that the quality of the recovered carbon dioxide is not high. Therefore, there is a need to provide a process for more efficiently recovering carbon dioxide from coal gas and removing sulfides therefrom to achieve capture and reuse of carbon dioxide.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems, the utility model provides a device for removing sulfides in coal gas and recovering carbon dioxide, which can remove sulfides and improve the quality of carbon dioxide.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a device for removing sulfide and recovering carbon dioxide in coal gas is characterized by comprising a coal gas compression unit, a hydrogen sulfide removal unit, a carbon dioxide absorption unit, a carbon dioxide desorption unit, a carbon dioxide enriched gas compression unit and a carbon dioxide rectification liquefaction unit.
A device for removing sulfides in coal gas and recovering carbon dioxide comprises a coal gas compression unit, a hydrogen sulfide removal unit, a carbon dioxide absorption unit, a carbon dioxide desorption unit, a carbon dioxide enriched gas compression unit and a carbon dioxide rectification liquefaction unit;
the coal gas compression unit is connected with the coal gas inlet and is used for compressing coal gas;
the hydrogen sulfide removal unit is connected with a coal gas outlet of the coal gas compression unit;
the carbon dioxide absorption unit is connected with a hydrogen sulfide removal gas outlet of the hydrogen sulfide removal unit;
the carbon dioxide desorption unit is connected with a carbon dioxide absorption product outlet of the carbon dioxide absorption unit;
the carbon dioxide enriched gas compression unit is connected with a carbon dioxide enriched gas outlet of the carbon dioxide desorption unit;
the carbon dioxide rectifying and liquefying unit is connected with a carbon dioxide enriched gas compression outlet of the carbon dioxide enriched gas compression unit.
Optionally, the carbon dioxide absorption unit is a physical adsorption unit or a chemical absorption unit.
Optionally, the carbon dioxide desorption unit comprises a desorption column, a gas-liquid separator, a heating unit and a pressure reduction unit.
Optionally, the carbon dioxide rectification liquefaction unit comprises a carbon dioxide liquefier, a stripping tower, a refrigeration compressor and a condenser.
Optionally, the carbon dioxide absorption unit is a chemical absorption unit, specifically an absorption tower, and the inside of the absorption tower is filled with an alkaline solution.
The utility model has the beneficial effects that the hydrogen sulfide removal unit is used, so that the sulfide impurities in the carbon dioxide can be obviously reduced, and the carbon dioxide absorption unit absorbs the carbon dioxide and other components (CO and H) in the coal gas2And N2And the like), most of carbon dioxide is enriched, the carbon dioxide enters a carbon dioxide desorption unit for desorption to form carbon dioxide enriched gas, the carbon dioxide enriched gas further enters a carbon dioxide rectification liquefaction unit, and the carbon dioxide enriched gas can be liquefied to form a liquid carbon dioxide product through cryogenic rectification liquefaction at low temperature. The device has high removal rate of carbon dioxide in the coal gas, low separation cost and high product purity。
Drawings
The utility model is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the present invention.
Detailed Description
FIG. 1 is a device for removing sulfides in coal gas and recovering carbon dioxide, which comprises a coal gas compression unit, a hydrogen sulfide removal unit, a carbon dioxide absorption unit, a carbon dioxide desorption unit, a carbon dioxide enriched gas compression unit and a carbon dioxide rectification liquefaction unit; the coal gas compression unit is connected with the coal gas inlet and is used for compressing coal gas; the hydrogen sulfide removal unit is connected with a coal gas outlet of the coal gas compression unit; the carbon dioxide absorption unit is connected with a hydrogen sulfide removal gas outlet of the hydrogen sulfide removal unit; the carbon dioxide desorption unit is connected with a carbon dioxide absorption product outlet of the carbon dioxide absorption unit; the carbon dioxide enriched gas compression unit is connected with a carbon dioxide enriched gas outlet of the carbon dioxide desorption unit; the carbon dioxide rectifying and liquefying unit is connected with a carbon dioxide enriched gas compression outlet of the carbon dioxide enriched gas compression unit.
[ example 1 ]
Composition in the gas produced in ironworks:
CO2，35.20％；N2，10.30％；CO，40.50％；H28.80 percent; 3.20 percent of water; hydrogen sulfide about 60mg/Nm3。
The coal gas has temperature and pressure, the temperature is about 50 ℃, and the pressure is about 0.25 Mpa.
The device shown in figure 1 is adopted to treat coal gas generated in iron making, the coal gas is compressed to 0.90MPa by a compression unit and then is removed by hydrogen sulfide, the pressure of a coal gas outlet entering an absorption unit is 0.90MPa, the temperature is 45 ℃, the absorbed carbon dioxide-rich liquid enters a desorption unit, the temperature of the carbon dioxide-rich liquid entering the desorption unit is 85 ℃, the pressure is 0.1MPa, and CO obtained by the desorption unit2The gas temperature is 80 ℃ and the pressure is 0.20 MPa. After being compressed by a two-stage screw compressor, the mixture enters a cryogenic rectification unit at the temperature of 45 ℃ and the pressure of 2.5MpaFurther separating non-condensable gas components in a high-pressure stripping tower at-20 deg.C and 2.50Mpa to obtain industrial-grade liquid CO2And (5) producing the product.
Claims (4)
1. A device for removing sulfide and recovering carbon dioxide in coal gas is characterized by comprising a coal gas compression unit, a hydrogen sulfide removal unit, a carbon dioxide absorption unit, a carbon dioxide desorption unit, a carbon dioxide enriched gas compression unit and a carbon dioxide rectification liquefaction unit;
the coal gas compression unit is connected with the coal gas inlet and is used for compressing coal gas;
the hydrogen sulfide removal unit is connected with a coal gas outlet of the coal gas compression unit;
the carbon dioxide absorption unit is connected with a hydrogen sulfide removal gas outlet of the hydrogen sulfide removal unit;
the carbon dioxide desorption unit is connected with a carbon dioxide absorption product outlet of the carbon dioxide absorption unit;
the carbon dioxide enriched gas compression unit is connected with a carbon dioxide enriched gas outlet of the carbon dioxide desorption unit;
the carbon dioxide rectifying and liquefying unit is connected with a carbon dioxide enriched gas compression outlet of the carbon dioxide enriched gas compression unit.
2. The apparatus for removing sulfides and recovering carbon dioxide in coal gas as claimed in claim 1, wherein said carbon dioxide absorption unit is a physical absorption unit or a chemical absorption unit.
3. The apparatus for sulfide removal and carbon dioxide recovery in a gas of claim 1, wherein the carbon dioxide desorption unit comprises a desorption tower, a gas-liquid separator, a heating unit and a pressure reduction unit.
4. The apparatus for removing sulfides and recovering carbon dioxide in coal gas as claimed in claim 1, wherein the carbon dioxide rectification liquefaction unit comprises a carbon dioxide liquefier, a stripping tower, a refrigeration compressor and a condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122874928.0U CN216236881U (en) | 2021-11-23 | 2021-11-23 | Device for removing sulfide and recovering carbon dioxide in coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122874928.0U CN216236881U (en) | 2021-11-23 | 2021-11-23 | Device for removing sulfide and recovering carbon dioxide in coal gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216236881U true CN216236881U (en) | 2022-04-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122874928.0U Active CN216236881U (en) | 2021-11-23 | 2021-11-23 | Device for removing sulfide and recovering carbon dioxide in coal gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216236881U (en) |
-
2021
- 2021-11-23 CN CN202122874928.0U patent/CN216236881U/en active Active
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Address after: Room 0609-0612, Building A, Gaoke Building, Kaiyuan Avenue, High tech Zone, Yulin City, Shaanxi Province, 719000 Patentee after: Yulin Dagong Fine Chemical Technology Research Institute Country or region after: China Patentee after: Yulin Zhongke Environmental Protection Technology Group Co.,Ltd. Address before: 719054 room 0609-0612, block a, Gaoke building, Kaiyuan Avenue, high tech Zone, Yulin City, Shaanxi Province Patentee before: Yulin Dagong Fine Chemical Technology Research Institute Country or region before: China Patentee before: YULIN ZHONGKE ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT CO.,LTD. |