CN1107530C - Composite decarbonizing liquid - Google Patents
Composite decarbonizing liquid Download PDFInfo
- Publication number
- CN1107530C CN1107530C CN00126925A CN00126925A CN1107530C CN 1107530 C CN1107530 C CN 1107530C CN 00126925 A CN00126925 A CN 00126925A CN 00126925 A CN00126925 A CN 00126925A CN 1107530 C CN1107530 C CN 1107530C
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- decarbonizing liquid
- composite
- composite decarbonizing
- gas
- 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.)
- Expired - Fee Related
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 title claims description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 37
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 37
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 claims abstract description 10
- OPKOKAMJFNKNAS-UHFFFAOYSA-N N-methylethanolamine Chemical compound CNCCO OPKOKAMJFNKNAS-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229960002887 deanol Drugs 0.000 claims abstract description 10
- 239000012972 dimethylethanolamine Substances 0.000 claims abstract description 10
- PMODATROEZUNCM-UHFFFAOYSA-N CN(CCO)CCO.[N] Chemical compound CN(CCO)CCO.[N] PMODATROEZUNCM-UHFFFAOYSA-N 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 150000004885 piperazines Chemical class 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 23
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 12
- 238000010521 absorption reaction Methods 0.000 abstract description 12
- 229910021529 ammonia Inorganic materials 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 4
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 239000012190 activator Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 description 2
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 229920000768 polyamine Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 150000003053 piperidines Chemical class 0.000 description 1
- 238000004064 recycling 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
- 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
Landscapes
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
A composite decarbonizing solution for removing carbon dioxide from gas comprises the following raw materials in percentage by weight: 30.0 to 50.0% of nitrogen-methyldiethanolamine; b.0.1 to 1.5% dimethylethanolamine; c.0.5 to 1.5% methylethanolamine; 1.0 to 2.0% of diazacyclo; E. the balance of water. The invention is used for the carbon dioxide removal working section in the process flow of the synthetic ammonia, and has large absorption capacity and high purification degree for the carbon dioxide.
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 piperidines 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 CN1340374A (en) | 2002-03-20 |
| CN1107530C true 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| CN109529547A (en) | 2018-12-24 | 2019-03-29 | 大连理工大学 | The decarbonizing solution of the trapping carbon dioxide in gas mixture of hygroscopicity influence can be reduced |
-
2000
- 2000-09-02 CN CN00126925A patent/CN1107530C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1340374A (en) | 2002-03-20 |
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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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030507 Termination date: 20120902 |