CN1073373A - A kind of compound decarbonization solvent and decarbonization method - Google Patents
A kind of compound decarbonization solvent and decarbonization method Download PDFInfo
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- CN1073373A CN1073373A CN92114560A CN92114560A CN1073373A CN 1073373 A CN1073373 A CN 1073373A CN 92114560 A CN92114560 A CN 92114560A CN 92114560 A CN92114560 A CN 92114560A CN 1073373 A CN1073373 A CN 1073373A
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- solvent
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- decarbonization
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
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- Gas Separation By Absorption (AREA)
Abstract
The present invention relates to decarbonization solvent and decarbonization method in synthetic ammonia, the gas purifying process, be mainly used in the carbonic acid gas that removes in the unstripped gas.This compound decarbonization solvent is to add alcoholic solvent B and the alcamines solvent C is composited in the third carbon solvent A.This decarbonization method comprises that absorption-flash distillation-gas puies forward-reclaim four operations, the one-level recovery tower 9 that it is characterized in that recovery process is connected with secondary recovery tower 11, capture solvent vapour remaining in the carbon dioxide that once desorbs and the gas stripping gas once more, reduce solvent cost, improve degree of purification, prolong service life of equipment, reduce advantages such as solvent process loss thereby reach.
Description
The present invention relates to decarbonization solvent and decarbonization method in synthetic ammonia, the gas purifying process; Be mainly used in the carbonic acid gas that removes in the unstripped gas.
At present, adopting propylene carbonate (being commonly called as third carbon) to remove in the unstripped gas carbon dioxide process carries-reclaims four by absorptions-flash distillation-gas and go on foot operations and finish, because the third carbon price is higher, limited to the carbonic acid gas dissolving power, its decarbonization method productive expense is higher, the decarburization degree of purification is not enough, add under processing condition, because of third carbon contains certain moisture, after having dissolved sour gas such as carbonic acid gas and hydrogen sulfide, carbon steel equipment is produced corrosion, the iron rust throw out that corrosion of carbon steel generated should occluding device in packing layer, pipeline and valve can quicken again that hydrogen sulfide is oxidized to elemental sulfur in third carbon, cause equipment, sulphur deposition on the inner-walls of duct, especially the third carbon water cooler is seriously stopped up, and often needs the cleaning that stops production, and influences the economic benefit of manufacturer.Therefore, need change new creation to decarbonization solvent in synthetic ammonia, the gas purifying process and decarbonization method.
The present invention seeks at decarbonization solvent that adopts in the above-mentioned 3-c hydrocarbon decarbonizing process and the existing defective of decarbonization method, and a kind of compound decarbonization solvent and decarbonization method that can reduce solvent production cost, decarburization degree of purification height, prolongation service life of equipment, reduce the solvent process loss is provided.
Finish above-mentioned purpose of the present invention by the implementation of following technical conceive:
This compound decarbonization solvent is to add alcoholic solvent B and the alcamines solvent C is composited in the third carbon agent A, and the scope of its concentration weight ratio: A is 65～93%, and B is 6～25%, and C is 1～10%.
This method that removes titanium dioxide carbonization carbon in the unstripped gas comprises that absorption-Nei steaming-gas puies forward-reclaim four operations, and the one-level recovery tower that it is characterized in that recovery process is connected with the secondary recovery tower and captures remaining solvent vapour in the carbon dioxide that once desorbs and the gas stripping gas once more.
The present invention compares with aforementioned known technology, can not only reduce solvent cost about 10 and improve decarburization degree of purification about 24 percent; And still have and alleviate carbon steel equipment corrosion, increase the service life and reduce power consumption 1 15 with first-class advantage.
Accompanying drawing represents that the present invention removes the process flow sheet of carbonic acid gas method in the unstripped gas.
Fig. 1 is the technical process that removes carbonic acid gas in the unstripped gas.
Describe details of the present invention in detail below in conjunction with accompanying drawing:
This compound decarbonization solvent is to add alcoholic solvent B and the alcamines solvent C is composited in the third carbon solvent A, and the scope of its concentration weight ratio: A is 65～93%, and B is 6～25%, and C is 1～10%.B and C should meet the following conditions: the one, and solvability and the selectivity higher to carbonic acid gas; The 2nd, higher boiling point is arranged, to reduce this component volatilization loss; The 3rd, can dissolve each other with third carbon, the double solvents after dissolving each other has better chemical stability; The 4th, price obviously reduces than third carbon; The 5th, carbon steel there is significant corrosion inhibition.
This removes the method for carbonic acid gas in the unstripped gas, comprise that absorption-Nei steaming-gas puies forward-reclaim four operations, its one-level recovery tower 9 at recovery process is connected with secondary recovery tower 11 and captures remaining solvent vapour in the carbon dioxide that once desorbs and the gas stripping gas once more.
E is pressurized to 1.3MPa through gas compressor when conversion gas, after dividing device 1, conversion gas gas-liquid imports 2 bottoms, absorption tower, compound decarbonization solvent boosts through solvent pump 5, again through but device 4 input towers 2 tops of molten cryogen, solvent sprays from top to bottom, with conversion air pressure abundant counter current contact in tower 2 from bottom to top, to absorb the carbonic acid gas among the conversion gas E.Decarburization after gas D discharges from tower 2 top, sends into compression behind purified gas gas-liquid separator 3, copper is washed.The decarbonizing liquid (rich solution) of discharging from tower 2 bottoms is depressed into steaming device 6 in the normal pressure, separate sucking-off at this and be dissolved in most of carbonic acid gas in the rich solution, solvent flows into strippers 7 tops, spray from top to down from device 6 again, tower 7 bottom gas blowers 8 blast air gas and carry, and gas is carried back solvent (lean solution) by pump 5 circulations.
The gas stripping gas G that separates the carbon dioxide F of sucking-off from device 6 tops and emit from tower 7 tops enters the bottom of one-level recovery tower 9 epimeres and hypomere respectively, one-level thin liquid (solvent aqueous solution total concn＜10%) counter current contact that enters with hypomere top from tower 9 from bottom to top in tower 9 is with the solvent vapour of carrying secretly among capturing carbon dioxide gas F and the gas stripping gas G.Carbon dioxide F and gas stripping gas G enter the top of secondary recovery tower 11 epimeres and hypomere more respectively after this washing and recycling, secondary thin liquid (solvent total concn＜4%) counter current contact that in tower 11, enters with hypomere top from tower 11 from bottom to top, remaining solvent vapour among capturing carbon dioxide gas F and the gas stripping gas G once more.Through this two-stage washing and recycling, can be ignored by the solvent vapour waste that carbon dioxide F and gas stripping gas G take out of.This carbon dioxide gas F can be for producing product usefulness such as soda ash, urea, and gas stripping gas G is emptying then.When thin liquid total concn in the one-level recovery tower 9 reaches controlling index (10%), mends to go into wherein according to the water yield (≤3%) in the solvent in when running in batches, the thin liquid amount that reduces in the tower 9 by tower 11 thin liquids mend into, the thin liquid amount of tower 11 minimizings is supplied with soft water.Thereby reach advantages such as reducing solution cost, raising degree of purification, prolongation service life of equipment, the loss of reduction solvent process.
Claims (3)
1, a kind of compound decarbonization solvent comprises third carbon solvent (A), it is characterized in that having added in third carbon solvent (A) alcoholic solvent (B).
2, a kind of method that removes carbonic acid gas in the unstripped gas, comprise that absorption-flash distillation-gas puies forward-reclaim four operations, the one-level recovery tower (9) that it is characterized in that recovery process is connected with secondary recovery tower (11) and captures remaining solvent vapour in the carbon dioxide (F) that once desorbs and the gas stripping gas (G) once more.
3, compound decarbonization solvent according to claim 1 is characterized in that having added in the said alcoholic solvent (B) alcamines solvent (C).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92114560A CN1073373A (en) | 1992-12-06 | 1992-12-06 | A kind of compound decarbonization solvent and decarbonization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92114560A CN1073373A (en) | 1992-12-06 | 1992-12-06 | A kind of compound decarbonization solvent and decarbonization method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1073373A true CN1073373A (en) | 1993-06-23 |
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ID=4947000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92114560A Pending CN1073373A (en) | 1992-12-06 | 1992-12-06 | A kind of compound decarbonization solvent and decarbonization method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1073373A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112856C (en) * | 1999-02-19 | 2003-07-02 | 株式会社宾格雷 | Instant noodle fried with hydrogenated vegetable oil and method for mfg. same |
| CN109173592A (en) * | 2018-08-20 | 2019-01-11 | 青岛科技大学 | A kind of method that ionic liquid captures carbon dioxide in flue gas as absorbent |
| CN116870663A (en) * | 2023-08-04 | 2023-10-13 | 中国石油天然气集团有限公司 | Amine liquid purification and regeneration system and method |
-
1992
- 1992-12-06 CN CN92114560A patent/CN1073373A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112856C (en) * | 1999-02-19 | 2003-07-02 | 株式会社宾格雷 | Instant noodle fried with hydrogenated vegetable oil and method for mfg. same |
| CN109173592A (en) * | 2018-08-20 | 2019-01-11 | 青岛科技大学 | A kind of method that ionic liquid captures carbon dioxide in flue gas as absorbent |
| CN116870663A (en) * | 2023-08-04 | 2023-10-13 | 中国石油天然气集团有限公司 | Amine liquid purification and regeneration system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |