CN1340374A - Composite decarbonizing liquid - Google Patents
Composite decarbonizing liquid Download PDFInfo
- Publication number
- CN1340374A CN1340374A CN00126925A CN00126925A CN1340374A CN 1340374 A CN1340374 A CN 1340374A CN 00126925 A CN00126925 A CN 00126925A CN 00126925 A CN00126925 A CN 00126925A CN 1340374 A CN1340374 A CN 1340374A
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- CN
- China
- Prior art keywords
- carbon dioxide
- decarbonizing liquid
- composite
- gas
- composite decarbonizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
Abstract
A composite decarbonizing liquid for removing CO2 from gas in ammonia synthesizing process contains nitrogen-methyl diethanolamine (30-50 wt.%), dimethyl ethanolamine (0.1-1.5 %), methyl ethanolamine (0.5-1.5), diazahexacyle (1-2 %) and water (the rest). Its advantages are high CO2 capacity and high cleaning level.
Description
The present invention relates to the technical field of separating carbon dioxide from gas, is a kind of composite decarbonizing liquid, is a kind of nitrogen-methyl diethanolamine composite solution that contains three kinds of activators.
When nitrogen-methyl diethanolamine (be called for short MDEA) solution contacts with the mist that pressurizes, the carbon dioxide in the mist is absorbed by solution; When above-mentioned solution desorbs carbon dioxide by normal pressure desorb and steam stripping from above-mentioned solution.With simple MDEA solution absorption and desorption carbon dioxide, then the purifying carbon dioxide degree is lower, but speed is slower, and hear rate is higher.
Publication number is that the patent documentation (being correlation technique 1) of CN1091332A discloses a kind of polyamine process and removes carbon dioxide and sulfide in the gas, it is a kind of nitrogen-methyl diethanolamine composite solution that contains two kinds of activators, this composite solution is when removing carbon dioxide, purifying carbon dioxide degree height, but hear rate is still high.
In view of the problem of above-mentioned existence, the present invention proposes a kind of, composite decarbonizing liquid that degree of purification high big to the carbon dioxide absorption capacity.
The present invention realizes by following measure: this composite decarbonizing liquid that removes carbon dioxide in the gas is made of following raw material by weight percentage:
A.30.0 to nitrogen-methyl diethanolamine of 50.0%;
B.0.1 to 1.5% dimethylethanolamine;
C.0.5 to 1.5% methylethanolamine;
D.1.0 to 2.0% two piperazines;
E. the water of surplus.
The present invention has selected dimethylethanolamine for use, the activator of methylethanolamine and three kinds of different alkalescence of two piperazines, under the different load condition, obtain corresponding activation like this, with select for use piperazine to make single activator to compare, the common absorbent properties of load have tangible improvement can improve gas purification degree in senior middle school, to energy-conservation favourable, dimethylethanolamine wherein, it is big that methylethanolamine has in the water solubility, dissolve each other fully, quite (boiling point is 140 to 160 ℃ to its volatility, and piperazine is 148 ℃) advantage, therefore process conditions are more stable, and select dimethylethanolamine and the methylethanolamine cost low (price of general piperazine is dimethylethanolamine or methylethanolamine five to ten times) than single piperazine for use.Following percentage all is weight percentage.
Remove carbon dioxide workshop section with what composite decarbonizing liquid of the present invention was used for the ammonia synthesis process flow process, its technique effect index and above-mentioned publication number are that the technique effect index contrast of the disclosed polyamine process solution of patent documentation (being correlation technique 1) of CN1091332A is as follows:
One, the content of carbon dioxide (by weight percentage) in the purified gas:
It is A. of the present invention less than 0.01%,
B. correlation technique 1 is 0.01 to 0.1%.；
Two, solution absorbability (NM
3/ M
3Solution)
A. of the present invention is 22 to 26,
B. correlation technique 1 is 16 to 17;
Three, the content of carbon dioxide (by weight percentage) in the regeneration gas:
A. of the present invention is 99.0 to 99.8%,
B. correlation technique 1 is 98.0 to 99.8%;
Four, heat energy consumption: (KJ/NM
3Carbon dioxide.)
A. of the present invention is 1550 to 1700,
B. correlation technique 1 is 1881.
Accompanying drawing 1 is the process flow diagram that removes carbon dioxide workshop section of the present invention.
Composite decarbonizing liquid of the present invention is as follows for the synthesis of the carbon dioxide removal workshop section in the ammonia process flow process: as attached Shown in Figure 1, this workshop section is made up of absorption tower, flash column, desorber and regenerator; Unstripped gas enters first and inhales Receive at the bottom of the tower T1, elder generation contacts with half poor composite decarbonizing liquid and absorbs in T1 at the bottom of first absorption tower, then second Contact further with poor composite decarbonizing liquid among the T2 of absorption tower and absorb, the synthesis gas after the purification then absorbs from second The top of tower T2 is left; Rich composite decarbonizing liquid after the absorption enters flash column after the 4th heat exchanger E21 heating T3 removes desorber T4 after being flashed to 9.0barg, and flashed vapour reclaims carbon dioxide and compound taking off in washer T9 Carbon liquid; Rich composite decarbonizing liquid from flash column T3 carries out desorb in desorber T4, it is partly poor multiple that desorb obtains Closing a decarbonizing liquid part enters regenerator T5 and carries out further desorb, another one after First Heat Exchanger E15 heating The rear conduct half poor composite decarbonizing liquid of lease making the 5th heat exchanger E22 cooling also enters the first absorption tower T1; The stripping gas warp After the 3rd heat exchanger E17 cooling, behind recycling can V11, obtain carbon dioxide product gas; Obtain at the bottom of the regenerator T5 tower Lean solution, obtain poor composite decarbonizing liquid and enter absorption tower T2 through after the second heat exchanger E16 cooling;
The technological condition of this workshop section is:
The operating pressure on absorption tower is: 1.5 to 3.0MPa (absolutely),
The lean solution temperature on absorption tower is: 45 to 55 ℃,
The semi lean solution temperature on absorption tower is: 60 to 80 ℃,
The tower reactor temperature of regenerator is: 95 to 110 ℃,
The content of carbon dioxide in the unstripped gas: 15 to 35%,
The content of carbon dioxide in the regeneration gas: 99.0 to 99.8%,
The absorbability of solution: 22 to 26 (NM3/M
3Solution),
Thermal energy consumption: 1550 to 1700KJ/NM3Carbon dioxide.
Below in conjunction with embodiment the present invention is further described:
Embodiment 1, this composite decarbonizing liquid is made of following raw material by weight percentage: nitrogen-methyl diethanolamine of 30.0%, 0.1% dimethylethanolamine, 0.5% methylethanolamine, 1.0% two piperazines and the water of surplus, this composite decarbonizing liquid is used for removing in the carbon dioxide workshop section of ammonia synthesis process flow process, in this workshop section: the flow of unstripped gas is 1393.6MT/hr, temperature is 75 ℃, and carbon dioxide content is 23.6%; The content of carbon dioxide in the regeneration gas: 99.1%, heat energy consumption: 1550KJ/NM
3Carbon dioxide.
Embodiment 2, this composite decarbonizing liquid is made of following raw material by weight percentage: nitrogen-methyl diethanolamine of 40.0%, 1.0% dimethylethanolamine, 1.0% methylethanolamine, 1.5% two piperazines and the water of surplus, this composite decarbonizing liquid is used for removing in the carbon dioxide workshop section of ammonia synthesis process flow process, in this workshop section: the flow of unstripped gas is 1393.6MT/hr, temperature is 75 ℃, and carbon dioxide content is 26.0%; The content of carbon dioxide in the regeneration gas: 99.5%, heat energy consumption: 1630KJ/NM
3Carbon dioxide.
Embodiment 3, this composite decarbonizing liquid is made of following raw material by weight percentage: nitrogen-methyl diethanolamine of 50.0%, 1.5% dimethylethanolamine, 1.5% methylethanolamine, 2.0% two piperazines and the water of surplus, this composite decarbonizing liquid is used for removing in the carbon dioxide workshop section of ammonia synthesis process flow process, in this workshop section: the flow of unstripped gas is 1393.6MT/hr, temperature is 75 ℃, and carbon dioxide content is 28.0%; The content of carbon dioxide in the regeneration gas: 99.8%, heat energy consumption: 1700KJ/NM
3Carbon dioxide.
Claims (1)
1. composite decarbonizing liquid that removes carbon dioxide in the gas is characterized in that this composite decarbonizing liquid is made of following raw material by weight percentage:
A.30.0 to nitrogen-methyl diethanolamine of 50.0%;
B.0.1 to 1.5% dimethylethanolamine;
C.0.5 to 1.5% methylethanolamine;
D.1.0 to 2.0% two piperazines;
E. the water of surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00126925A CN1107530C (en) | 2000-09-02 | 2000-09-02 | Composite decarbonizing liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00126925A CN1107530C (en) | 2000-09-02 | 2000-09-02 | Composite decarbonizing liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1340374A true CN1340374A (en) | 2002-03-20 |
| CN1107530C CN1107530C (en) | 2003-05-07 |
Family
ID=4592100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00126925A Expired - Fee Related CN1107530C (en) | 2000-09-02 | 2000-09-02 | Composite decarbonizing liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1107530C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804292A (en) * | 2010-03-25 | 2010-08-18 | 南京大学 | Special MDEA formula solution activated by functional ion liquid for CO2 gas absorption separation |
| CN101822932A (en) * | 2010-06-12 | 2010-09-08 | 中国石油集团工程设计有限责任公司 | Composite decarbonization solvent for eliminating carbon dioxide in natural gases |
| CN103394277A (en) * | 2013-08-06 | 2013-11-20 | 国家电网公司 | Organic amine compound absorbent for removal of carbon dioxide in fire coal flue gas |
| EP3673973A1 (en) | 2018-12-24 | 2020-07-01 | Dalian University of Technology | Decarbonization solution for capturing carbon dioxide in mixed gas and capable of reducing impact of hygroscopicity |
-
2000
- 2000-09-02 CN CN00126925A patent/CN1107530C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804292A (en) * | 2010-03-25 | 2010-08-18 | 南京大学 | Special MDEA formula solution activated by functional ion liquid for CO2 gas absorption separation |
| CN101804292B (en) * | 2010-03-25 | 2012-08-22 | 南京大学 | Special MDEA formula solution activated by functional ion liquid for CO2 gas absorption separation |
| CN101822932A (en) * | 2010-06-12 | 2010-09-08 | 中国石油集团工程设计有限责任公司 | Composite decarbonization solvent for eliminating carbon dioxide in natural gases |
| CN101822932B (en) * | 2010-06-12 | 2013-01-02 | 中国石油集团工程设计有限责任公司 | Composite decarbonization solvent for eliminating carbon dioxide in natural gases |
| CN103394277A (en) * | 2013-08-06 | 2013-11-20 | 国家电网公司 | Organic amine compound absorbent for removal of carbon dioxide in fire coal flue gas |
| CN103394277B (en) * | 2013-08-06 | 2015-11-18 | 国家电网公司 | A kind of organic amine composite absorber removing carbon dioxide in coal-fired flue-gas |
| EP3673973A1 (en) | 2018-12-24 | 2020-07-01 | Dalian University of Technology | Decarbonization solution for capturing carbon dioxide in mixed gas and capable of reducing impact of hygroscopicity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1107530C (en) | 2003-05-07 |
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Granted publication date: 20030507 Termination date: 20120902 |