CN107866137A - A kind of capture method of carbon dioxide in flue gas - Google Patents
A kind of capture method of carbon dioxide in flue gas Download PDFInfo
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- CN107866137A CN107866137A CN201610855665.XA CN201610855665A CN107866137A CN 107866137 A CN107866137 A CN 107866137A CN 201610855665 A CN201610855665 A CN 201610855665A CN 107866137 A CN107866137 A CN 107866137A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1431—Pretreatment by other processes
- B01D53/1443—Pretreatment by diffusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
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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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to carbon dioxide in gas trapping technique field, is related to a kind of process to film surface amine aqueous solution absorbing carbon dioxide.One kind is using non-hydrophobic property ceramic membrane as mass transfer apparatus, pass through the method for gas-liquid contact absorption carbon dioxide in flue gas, it is characterized in that the negative-pressure cyclic by absorbent between film absorbent assembly and regenerator, carry out the trapping of carbon dioxide, for substituting hydrophobic hollow-fibre membrane, the introducing of ceramic membrane overcomes the problems such as hollow-fibre membrane temperature stress tolerance is poor, easily pollution, hydrophobic performance decline, and significantly expands the temperature and pressure scope that film absorbs, the durable and stability of equipment also greatly improves.
Description
Technical field
The invention belongs to carbon dioxide in gas trapping technique field, is related to a kind of to film surface amine aqueous solution absorption titanium dioxide
The process of carbon.
Background technology
CO2A large amount of discharges cause global warming, exacerbate greenhouse effects, the extreme weather countries in the world that take place frequently are more next
More pay attention to the emission control of carbon dioxide.With《The Kyoto Protocol》Signing and Copenhagen global climate summit hold,
More pay attention to the research and development and industrialization of carbon dioxide discharge-reduction technology in countries in the world.The CO that combustion of fossil fuel is discharged2Account for total row
High-volume 80% or so, wherein fossil fired power plant flue gas is CO2The emission source concentrated steadily in the long term, its CO discharged2Account for total
The 30% of discharge capacity.Predict the year two thousand fifty, CO caused by about 20 ~ 40% global fossil fuel2Discharge can be technically
It is adapted to capture, including 30 ~ 60% the CO from coal-burning power plant2Discharge and 30 ~ 40% is from other industrial CO2Discharge.Therefore realize
Coal-fired plant flue gas CO2Extensive trapping is that reply Global climate change is great by as the main path of reduction of greenhouse gas discharge
One of mode of potentiality.
Membrane absorption method technique combines the selectivity of chemical absorption method and the compactedness of membrane separation process, is that one kind has prospect very much
CO2Trapping technique；Conventional gas-liquid contact arrangement can be overcome the shortcomings of using membrane absorption method, improve the trapping effect of carbon dioxide
Rate, while those hydramine such as MEA, the MDEA that there is good absorption regenerability but easily degrade etc. can be used, it will drop significantly
The energy consumption of low trapping process.Handled gas is not directly contacted with absorbing liquid in membrane absorption method, and the two is respectively in the effluent of film two
Dynamic, film simply plays a part of separation gas and absorbing liquid in itself to gas without selectivity, and the micropore on film can allow film
The separated gas molecule in side, through microporous barrier to film opposite side, passes through film opposite side absorbing liquid in certain pressure can
Selective absorbing reaches the purpose of a certain component in separation gas.
Patent 89107166 proposes a kind of hollow fiber film assembly for gaseous jet simulation of helical arrangement, raw material
Gas walks the shell side of membrane module, through tunica fibrosa surface gas through tube side reverse flow；Patent 200820141700.2 and specially
Sharp CN101653700 provides a kind of membrane module for being acted on by hypergravity and strengthening mass transfer, and this be fixed on absorber element turns
Certain difficulty be present in terms of plant maintenance and larger-scale unit in the design above son.
Existing film absorption technique substantially uses hydrophobic hollow-fibre membrane to utilize doughnut for absorbent assembly
The hydrophobicity of film, selective passes through gas, while prevents penetration by liquid film surface from entering the gas phase main body of opposite side, hollow fibre
It is all organic film to tie up film, realizes hydrophobic but long-term use of by increasing the surface such as coating modified measures, is particularly having one
In fixed oil loving solvent, hydrophobic layer is highly susceptible to destroy, and Vapor Entrainment liquid, absorption efficiency are shown as in application process
The problems such as decline.
The content of the invention
The present invention proposes one kind using non-hydrophobic property ceramic membrane as mass transfer apparatus, passes through dioxy in gas-liquid contact absorption flue gas
Change the method for carbon.The film absorbing carbon dioxide method introduced at present on document, mainly by alkaline absorbent hydrophobic
Hollow fiber membrane surface and smoke contacts, using the hydrophobicity of hollow-fibre membrane, optionally the carbon dioxide in gas phase is turned
Move on in absorbing liquid, and liquid will not pass through hydrophobic film, reduce the risk of absorbent oxidation and pollution.Existing for this method
Problem one is that hollow-fibre membrane can be declined using hydrophobicity for a long time, particularly in the presence of organic molten and alkaline agent,
This hydrophobic performance downward trend is more obvious；Second, the regeneration after pollution of hollow fiber film is difficult；Third, hollow-fibre membrane
Tolerable temperature narrow range, below 50 DEG C, the absorption process larger for absorbing heat release, tunica fibrosa is difficult to hold general operation temperature
By.And the introducing of ceramic membrane overcomes these problems, significantly expand film absorb temperature and pressure scope, equipment it is durable and steady
It is qualitative also to greatly improve.
The main technical schemes of the present invention：The capture method of carbon dioxide in flue gas, it is characterised in that made pottery with non-hydrophobic property
Porcelain film absorbent assembly（5）For mass transfer apparatus, by absorbent in non-hydrophobic property ceramic film component（5）Negative pressure between regenerator
Circulation, carries out the trapping of carbon dioxide.
Usually, the present invention uses the ceramic membrane of non-hydrophobic property as material, the absorbent outlet 4 of membrane module 5 connection centrifugal pump
7, solvent tiny structure in membrane module 5 is formed by the negative pressure of centrifugal pump inlet 4 and circulated, prevents absorbing liquid from entering gas through film surface
Phase.The trapping process of carbon dioxide is as follows：From import（1）Carbon dioxide in the unstripped gas of entrance passes through non-hydrophobic property ceramic membrane
Absorbent assembly（5）Film surface mass transfer, into absorbent solution, by centrifugal pump inlet（4）Negative pressure formed solvent film inhale
Receive component（5）Interior tiny structure circulation, flue gas after purification is from gaseous phase outlet（2）Go out non-hydrophobic property ceramic film component（5）；Absorb
Absorbent solution after carbon dioxide is by centrifugal pump（7）Through outlet（6）It is delivered to regenerator（8）, the lean solution after regeneration, which circulates, to be returned
Return membrane module solution inlet（3）.Membrane module periodically washs cleaning, maintains surface mass-transfer efficiency.
The absorbent is alkaline absorbent.
Ceramic film component contamination resistance is strong, 20-200 DEG C of operation temperature, bears pressure limit 0-2MPa.
The beneficial effect of invention：For substituting hydrophobic hollow-fibre membrane, the introducing of ceramic membrane overcomes doughnut
The problems such as film temperature force resistance is poor, easily pollution, hydrophobic performance decline, significantly expands the temperature and pressure scope that film absorbs,
The durable and stability of equipment also greatly improves.
Brief description of the drawings
Fig. 1 is the capture method process flow diagram of embodiment carbon dioxide in flue gas.
Wherein, 1-raw material gas inlet, 2-purified gas go out, and 3-lean solution enters absorption tower, and 4-rich solution goes out absorption tower, and 5
- ceramic membrane absorbent assembly, 6-rich solution enter regenerator, 7-negative pressure solution circulation pump, 8-regenerator.
Embodiment
Following examples are referring to accompanying drawing 1.
Embodiment 1
Certain solvent internal circulating load 250kg/h, unstripped gas carbonated 15%, raw gas flow 80Nm3/ h, highest is anti-in membrane module
65 DEG C of temperature is answered, from import（1）Carbon dioxide in the unstripped gas of entrance passes through non-hydrophobic property ceramic membrane absorbent assembly（5）Film
Surface mass transfer, into absorbent solution, by centrifugal pump inlet（4）Negative pressure formed solvent in film absorbent assembly（5）Interior is micro-
Negative-pressure cyclic, flue gas after purification is from gaseous phase outlet（2）Go out non-hydrophobic property ceramic film component（5）；Suction after absorbing carbon dioxide
Agent solution is received by centrifugal pump（7）Through outlet（6）It is delivered to regenerator（8）, the lean solution after regeneration is recycled back into membrane module solution and enters
Mouthful（3）.Collecting carbonic anhydride rate 85%.By the application of half a year, film any surface finish, capture rate does not decline, purified gas no liquid folder
Band.
Embodiment 2
Certain solvent internal circulating load 250kg/h, unstripped gas carbonated 15%, raw gas flow 80Nm3/ h, highest is anti-in membrane module
75 DEG C of temperature is answered, from import（1）Carbon dioxide in the unstripped gas of entrance passes through non-hydrophobic property ceramic membrane absorbent assembly（5）Film
Surface mass transfer, into absorbent solution, by centrifugal pump inlet（4）Negative pressure formed solvent in film absorbent assembly（5）Interior is micro-
Negative-pressure cyclic, flue gas after purification is from gaseous phase outlet（2）Go out non-hydrophobic property ceramic film component（5）；Suction after absorbing carbon dioxide
Agent solution is received by centrifugal pump（7）Through outlet（6）It is delivered to regenerator（8）, the lean solution after regeneration is recycled back into membrane module solution and enters
Mouthful（3）.Collecting carbonic anhydride rate 80%.By the application of half a year, film any surface finish, capture rate does not decline, purified gas no liquid folder
Band.
Comparative example 1
Certain solvent internal circulating load 250kg/h, unstripped gas carbonated 15%, raw gas flow 80Nm3/ h, highest is anti-in membrane module
65 DEG C of temperature is answered, using hollow fiber film assembly as absorber, initial operating stage CO2Capture rate 85%, after 1 month, carbon dioxide
Capture rate is reduced to 76%, and liquid entrainment occurs in purified gas, and lyosoption loss is serious.
Claims (4)
1. a kind of capture method of carbon dioxide in flue gas, it is characterised in that with non-hydrophobic property ceramic membrane absorbent assembly（5）To pass
Matter equipment, by absorbent in non-hydrophobic property ceramic film component（5）Negative-pressure cyclic between regenerator, carry out carbon dioxide
Trapping.
2. capture method as claimed in claim 1, it is characterised in that：The trapping process of carbon dioxide is as follows：From import（1）Enter
Carbon dioxide in the unstripped gas entered passes through non-hydrophobic property ceramic membrane absorbent assembly（5）Film surface mass transfer, it is molten into absorbent
In liquid, by centrifugal pump inlet（4）Negative pressure formed solvent in film absorbent assembly（5）Interior tiny structure circulation, the flue gas after purification
From gaseous phase outlet（2）Go out non-hydrophobic property ceramic film component（5）；Absorbent solution after absorbing carbon dioxide is by centrifugal pump（7）Through
Outlet（6）It is delivered to regenerator（8）, the lean solution after regeneration is recycled back into membrane module solution inlet（3）.
3. capture method as claimed in claim 1 or 2, it is characterised in that non-hydrophobic property ceramic membrane absorbent assembly（5）Operation temperature
20-200 DEG C of degree, bears pressure limit 0-2Mpa.
4. capture method as claimed in claim 1 or 2, it is characterised in that the absorbent is alkaline absorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610855665.XA CN107866137B (en) | 2016-09-28 | 2016-09-28 | Method for capturing carbon dioxide in flue gas |
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| CN201610855665.XA CN107866137B (en) | 2016-09-28 | 2016-09-28 | Method for capturing carbon dioxide in flue gas |
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| CN107866137B CN107866137B (en) | 2021-06-01 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521970A (en) * | 2021-07-19 | 2021-10-22 | 重庆大学 | For CO2Membrane absorption method for trapping and utilization |
| CN114011212A (en) * | 2021-10-30 | 2022-02-08 | 雅邦绿色过程与新材料研究院南京有限公司 | Energy-saving process for recovering high-concentration CO2 by coupling membrane/MDEA solution |
| CN114225669A (en) * | 2022-02-25 | 2022-03-25 | 中国华能集团清洁能源技术研究院有限公司 | Absorption tower |
| CN115069069A (en) * | 2022-07-15 | 2022-09-20 | 重庆远达烟气治理特许经营有限公司科技分公司 | Coupling carbon capture system and gas power generation system |
| WO2024002310A1 (en) * | 2022-06-30 | 2024-01-04 | 中国石油天然气集团有限公司 | Method for coupling carbon dioxide capture and hydrogen production, and system therefor |
| CN117398832A (en) * | 2023-12-04 | 2024-01-16 | 广东海洋大学 | Phase change absorbent for capturing carbon dioxide and method for capturing carbon dioxide |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521970A (en) * | 2021-07-19 | 2021-10-22 | 重庆大学 | For CO2Membrane absorption method for trapping and utilization |
| CN114011212A (en) * | 2021-10-30 | 2022-02-08 | 雅邦绿色过程与新材料研究院南京有限公司 | Energy-saving process for recovering high-concentration CO2 by coupling membrane/MDEA solution |
| CN114225669A (en) * | 2022-02-25 | 2022-03-25 | 中国华能集团清洁能源技术研究院有限公司 | Absorption tower |
| WO2024002310A1 (en) * | 2022-06-30 | 2024-01-04 | 中国石油天然气集团有限公司 | Method for coupling carbon dioxide capture and hydrogen production, and system therefor |
| CN115069069A (en) * | 2022-07-15 | 2022-09-20 | 重庆远达烟气治理特许经营有限公司科技分公司 | Coupling carbon capture system and gas power generation system |
| CN117398832A (en) * | 2023-12-04 | 2024-01-16 | 广东海洋大学 | Phase change absorbent for capturing carbon dioxide and method for capturing carbon dioxide |
| CN117398832B (en) * | 2023-12-04 | 2024-03-22 | 广东海洋大学 | Phase change absorbent for capturing carbon dioxide and method for capturing carbon dioxide |
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