CN118384675A - Carbon capture amine liquid purification system and method - Google Patents
Carbon capture amine liquid purification system and method Download PDFInfo
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- CN118384675A CN118384675A CN202410590929.8A CN202410590929A CN118384675A CN 118384675 A CN118384675 A CN 118384675A CN 202410590929 A CN202410590929 A CN 202410590929A CN 118384675 A CN118384675 A CN 118384675A
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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
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
- B01D53/1412—Controlling the absorption process
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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
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
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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]
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Abstract
The invention discloses a carbon capture amine liquid purification system and a method. The carbon trapping amine liquid purification system provided by the embodiment of the invention realizes the coupling of the traditional carbon trapping process and the purification of the ion exchange resin amine liquid, and not only can remove the heat-stable salt in the organic amine adsorbent, but also can treat alkaline wastewater generated in the regeneration process of the ion exchange resin. The problem that the adsorption capacity of the organic amine adsorbent to carbon dioxide is affected due to the fact that heat-stable salt exists in the organic amine adsorbent solution is avoided, so that the trapping efficiency of the whole system is improved, and the stable operation reliability of the carbon trapping amine liquid purifying system is improved. Solves the disposal problem of the alkaline wastewater purified by the amine liquid, realizes the recycling of resources, improves the efficiency and the economy of the system, and can also reduce the acidic pollutants such as SO2 and the like in the flue gas.
Description
Technical Field
The invention relates to the technical field of carbon dioxide trapping, in particular to a carbon trapping amine liquid purifying system and a carbon trapping amine liquid purifying method.
Background
In the related art, flue gas exhausted by a coal-fired boiler generally enters an adsorption tower after being washed by a washing tower, carbon dioxide in the flue gas is adsorbed and removed by organic amine in the adsorption tower, the adsorbed and saturated organic amine is conveyed into a regeneration tower for heating, desorption and regeneration, the desorbed and regenerated organic amine is returned into the absorption tower, and the desorbed carbon dioxide is captured and recycled. However, the organic amine solution is repeatedly used for multiple times under the condition of high temperature and complex atmosphere, is extremely easy to age and decompose, and produces impurities such as heat-stable salt and the like, thereby seriously affecting the stable operation of the carbon capture device.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. For this reason, the embodiment of the invention provides a carbon capture amine liquid purification system and a method.
The carbon capture amine liquid purification system comprises a washing tower, an adsorption tower, a regeneration tower and an anion exchange resin device, wherein the washing tower is provided with a flue gas inlet, a flue gas outlet, a washing liquid inlet and a washing liquid outlet; the adsorption tower is provided with a smoke inlet and a purified smoke outlet, the smoke inlet is communicated with the smoke outlet to receive the washed smoke discharged by the washing tower, an organic amine adsorbent is arranged in the adsorption tower and is used for adsorbing carbon dioxide in the smoke, and the adsorbed smoke is discharged through the purified smoke outlet; the regeneration tower is used for receiving the adsorption saturated organic amine adsorbent discharged from the adsorption tower and carrying out desorption regeneration, and is provided with a regeneration gas outlet for discharging regeneration gas;
The anion exchange resin device is used for removing anions in the organic amine adsorbent discharged from the regeneration tower and then conveying the organic amine adsorbent into the adsorption tower, the anion exchange resin device is provided with a regeneration liquid inlet and a waste water outlet, the regeneration liquid inlet is used for enabling alkaline regeneration liquid to enter the anion exchange resin device, and the waste water outlet is communicated with the washing liquid outlet so as to convey at least part of alkaline waste water generated by the anion exchange resin device into the washing tower as washing liquid.
Optionally, the carbon capture amine liquid purification system of the embodiment of the invention comprises an acid-base neutralizer, wherein the acid-base neutralizer is provided with an acid liquid inlet, an alkali liquid inlet and a neutral liquid outlet, the acid liquid inlet is communicated with the washing liquid outlet, the alkali liquid inlet is communicated with the waste water outlet, and the acid-base neutralizer is used for neutralizing alkaline waste water generated by the anion exchange resin device with acidic washing liquid generated by the washing tower.
Optionally, the carbon capture amine liquid purification system of the embodiment of the invention includes a first circulation pipeline and a first circulation pump, wherein an inlet and an outlet of the first circulation pipeline are respectively communicated with the washing liquid outlet and the washing liquid inlet, and the first circulation pump is arranged on the first circulation pipeline.
Optionally, a first conveying pipe is arranged between the adsorption tower and the regeneration tower and is used for conveying the organic amine adsorbent desorbed and regenerated in the regeneration tower into the adsorption tower for adsorption, a second circulating pipeline is arranged on the first conveying pipe, and the anion exchange resin device is arranged on the second circulating pipeline.
Optionally, the second circulation pipeline is provided with a first control valve for controlling the on-off of the second circulation pipeline.
Optionally, the second circulation pipeline is further provided with an activated carbon filter and a microporous filter which are positioned upstream of the anion exchange resin device.
Optionally, a shunt tube is arranged on the second circulation pipeline, an inlet of the shunt tube is positioned at the downstream of the anion exchange resin device, an outlet of the shunt tube is connected with the organic amine adsorbent storage device, and a second control valve for controlling on-off of the shunt tube is arranged on the shunt tube.
Optionally, a second conveying pipe is arranged between the adsorption tower and the regeneration tower and used for conveying the organic amine adsorbent with saturated adsorption in the adsorption tower into the regeneration tower for desorption and regeneration;
The carbon capture amine liquid purification system further comprises a heat exchanger which is respectively connected with the first conveying pipe and the second conveying pipe and is used for exchanging heat between the organic amine adsorbent flowing through the first conveying pipe and the organic amine adsorbent flowing through the second conveying pipe.
Optionally, a cooler located downstream of the heat exchanger is further disposed on the first conveying pipe, and is used for cooling the organic amine adsorbent flowing through the first conveying pipe.
The carbon capture amine liquid purification method of the embodiment of the invention is applied to the carbon capture amine liquid purification system in any embodiment, and comprises the following steps:
Washing the flue gas by using a washing liquid;
Adsorbing the washed flue gas by using an organic amine adsorbent;
desorbing and regenerating the saturated organic amine adsorbent;
removing anions in the desorbed and regenerated organic amine adsorbent by an anion exchange resin method;
and (3) taking part of alkaline wastewater generated by the anion exchange resin method as a washing liquid to wash the flue gas, and neutralizing the other part of alkaline wastewater generated by the anion exchange resin method with an acidic washing liquid after washing the flue gas.
The carbon trapping amine liquid purification system and the method realize the coupling of the traditional carbon trapping process and the ion exchange resin amine liquid purification, not only can remove the heat-stable salt in the organic amine adsorbent, but also can treat alkaline wastewater generated in the ion exchange resin regeneration process. The problem that the adsorption capacity of the organic amine adsorbent to carbon dioxide is affected due to the fact that heat-stable salt exists in the organic amine adsorbent solution is avoided, so that the trapping efficiency of the whole system is improved, and the stable operation reliability of the carbon trapping amine liquid purifying system is improved. Solves the disposal problem of the alkaline wastewater purified by the amine liquid, realizes the recycling of resources, improves the efficiency and the economy of the system, and can also reduce the acidic pollutants such as SO2 and the like in the flue gas.
Drawings
FIG. 1 is a schematic diagram of a carbon capture amine liquid purification system in accordance with an embodiment of the present invention.
Reference numerals:
100. A carbon capture amine liquid purification system; 1. a washing tower; 101. a flue gas inlet; 102. a flue gas outlet; 103. a washing liquid inlet; 104. a washing liquid outlet; 2. an adsorption tower; 201. a smoke inlet; 202. a purified flue gas outlet; 3. a regeneration tower; 301. a regeneration gas outlet; 4. an anion exchange resin device; 401. a regeneration liquid inlet; 402. a waste water outlet; 5. acid-base neutralizer; 501. an acid liquor inlet; 502. an alkali liquor inlet; 503. a neutral liquid outlet; 6. a first circulation line; 7. a first circulation pump; 8. a first feed delivery tube; 9. a second circulation line; 10. a first control valve; 11. an activated carbon filter; 12. a microporous filter; 13. a shunt; 14. a second control valve; 15. a second feed delivery tube; 16. a heat exchanger; 17. a cooler.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1, a carbon capture amine liquid purification system 100 of an embodiment of the present invention includes a washing tower 1, an adsorption tower 2, a regeneration tower 3, and an anion exchange resin device 4. The scrubber 1 has a flue gas inlet 101, a flue gas outlet 102, a scrubbing liquid inlet 103 and a scrubbing liquid outlet 104, and the adsorption tower 2 has a flue gas inlet 201 and a purified flue gas outlet 202, the flue gas inlet 201 being in communication with the flue gas outlet 102 for receiving the scrubbed flue gas exiting the scrubber 1. The adsorption tower 2 is internally provided with an organic amine adsorbent for adsorbing carbon dioxide in the flue gas, and the adsorbed flue gas is discharged through a purified flue gas outlet 202. The regeneration tower 3 is configured to receive the adsorption-saturated organic amine adsorbent discharged from the adsorption tower 2 and perform desorption regeneration, and the regeneration tower 3 has a regeneration gas outlet 301 for discharging a regeneration gas.
The anion exchange resin device 4 is used for removing anions in the organic amine adsorbent discharged from the regeneration tower 3 and then conveying the organic amine adsorbent into the adsorption tower 2, the anion exchange resin device 4 is provided with a regeneration liquid inlet 401 and a waste water outlet 402, the regeneration liquid inlet 401 is used for alkaline regeneration liquid to enter the anion exchange resin device 4, and the waste water outlet 402 is communicated with the washing liquid outlet 104 so as to convey at least part of alkaline waste water generated by the anion exchange resin device 4 into the washing tower 1 as washing liquid.
In the use process of the carbon capture amine liquid purification system 100 provided by the embodiment of the invention, the power plant flue gas enters the washing tower 1 from the flue gas inlet 101 and is mixed with the washing liquid in the washing tower 1, so that pollutants (such as carbon dioxide, sulfur oxides, nitrogen oxides, smoke dust and the like) in the flue gas are washed, and the purpose of purifying the flue gas is achieved. The flue gas is discharged from the flue gas outlet 102 after being washed by the washing tower 1, the washed flue gas enters the adsorption tower 2 from the flue gas inlet 201, carbon dioxide in the flue gas is adsorbed under the adsorption action of the organic amine adsorbent in the adsorption tower 2, and the purified flue gas is discharged from the purified flue gas outlet 202. The adsorption saturated organic amine adsorbent enters the regeneration tower 3 from the adsorption tower 2 for heating desorption regeneration, and the gas generated by the regeneration of the adsorbent in the regeneration tower 3 is discharged from the regenerated gas outlet 301.
The organic amine adsorbent regenerated in the regeneration tower 3 enters the anion exchange resin device 4, and when the anion exchange resin contacts anions in the organic amine adsorbent solution in the anion exchange resin device 4, exchangeable ions on the anion exchange resin exchange with the anions in the organic amine adsorbent solution to remove heat-stable salts such as sodium sulfate, potassium chloride and the like in the organic amine adsorbent solution. When the inside of the pore diameter of the anion exchange resin is saturated, an alkaline solution (for example, sodium hydroxide or potassium hydroxide solution) is introduced into the anion exchange resin device 4 through the regeneration liquid inlet 401, and the resin after adsorption saturation is washed to recover the adsorption capacity of the resin, thereby realizing the regeneration of the resin. The alkaline wastewater generated by the resin regeneration in the anion exchange resin device 4 is discharged through the wastewater outlet 402, and part of the alkaline wastewater is conveyed back into the washing tower 1 as washing liquid, so that acid pollutants such as sulfur dioxide, nitrogen dioxide and the like in the flue gas can be washed down.
Therefore, the carbon capture amine liquid purification system 100 of the embodiment of the invention realizes the coupling of the traditional carbon capture process and the purification of the ion exchange resin amine liquid, not only can remove the heat stability salt in the organic amine adsorbent, but also can treat the alkaline wastewater generated in the regeneration process of the ion exchange resin. The problem that the adsorption capacity of the organic amine adsorbent to carbon dioxide is affected due to the fact that heat-stable salt exists in the organic amine adsorbent solution is avoided, so that the trapping efficiency of the whole system is improved, and the stable operation reliability of the carbon trapping amine liquid purifying system is improved. Solves the disposal problem of the alkaline wastewater purified by the amine liquid, realizes the recycling of resources, improves the efficiency and the economy of the system, and can also reduce the acidic pollutants such as SO2 and the like in the flue gas.
In some embodiments, the carbon capture amine liquid purification system 100 of embodiments of the present invention includes an acid-base neutralizer 5, the acid-base neutralizer 5 having an acid liquid inlet 501, a base liquid inlet 502, and a neutral liquid outlet 503. The acid liquor inlet 501 is communicated with the washing liquor outlet 104, the alkali liquor inlet 502 is communicated with the waste water outlet 402, and the acid-base neutralizer 5 is used for neutralizing alkaline waste water generated by the anion exchange resin device 4 with acidic washing liquor generated by the washing tower 1.
It will be appreciated that, because the flue gas contains acidic pollutants such as sulfur dioxide, when the alkaline wastewater washes the flue gas, the washing liquid at the bottom of the washing tower 1 becomes acidic, and the acidic washing liquid is discharged through the washing liquid outlet 104 and enters the acid-base neutralizer 5 through the acid liquid inlet 501. The alkaline waste water generated by the anion exchange resin device 4 is discharged through the waste water outlet 402, one part of the alkaline waste water enters the washing tower 1 as washing liquid, and the other part of the washing liquid enters the acid-base neutralizer 5 through the alkali liquid inlet 502. In the acid-base neutralizer 5, the acidic washing liquid and the alkaline wastewater react to form neutral salts and water, and these neutral substances can be discharged through the neutral liquid outlet 503.
Through acid-base neutralization, acidic and alkaline waste liquid can be converted into neutral substances, the influence on the environment is reduced, the discharge amount of the waste liquid is reduced, and the acid-base neutralization is a comparatively environment-friendly waste water treatment mode, so that the pollution to the environment is reduced. It should be noted that, in the actual operation process, parameters (such as acid-base ratio, reaction time, etc.) of the acid-base neutralizer 5 should be adjusted according to specific situations to ensure an optimal neutralization effect.
In some embodiments, the carbon capture amine liquid purification system 100 of the present embodiment includes a first circulation line 6 and a first circulation pump 7, the inlet and outlet of the first circulation line 6 are respectively communicated with a washing liquid outlet 104 and a washing liquid inlet 103, and the first circulation pump 7 is disposed on the first circulation line 6. The first circulating pump 7 pumps the washing liquid discharged from the washing liquid outlet 104 to the washing liquid inlet 103, so that the washing liquid is recycled for a plurality of times in the washing tower 1, the consumption of the washing liquid is reduced, the cost of waste liquid treatment and new liquid preparation is reduced, and the running cost of the whole system is reduced.
In some embodiments, a first material conveying pipe 8 is arranged between the adsorption tower 2 and the regeneration tower 3, and is used for conveying the organic amine adsorbent desorbed and regenerated in the regeneration tower 3 into the adsorption tower 2 for adsorption, a second circulation pipeline 9 is arranged on the first material conveying pipe 8, and the anion exchange resin device 4 is arranged on the second circulation pipeline 9.
The organic amine adsorbent desorbed and regenerated in the regeneration tower 3 is conveyed into the adsorption tower 2 through the first conveying pipe 8 for adsorption, the regenerated organic amine adsorbent entering the first conveying pipe 8 circulates on the first conveying pipe 8 through the second circulating pipeline 9, and anions in the organic amine adsorbent are continuously removed by utilizing the anion exchange resin device 4 on the second circulating pipeline 9. Through setting up a circulation branch pipeline on first conveying pipeline 8, when anion exchange resin device 4 need maintain when changing the resin material in the course of the work, can only control the break-make of second circulation pipeline 9 can, avoid organic amine adsorbent in the first conveying pipeline 8 to get into anion exchange resin device 4 for first conveying pipeline 8 can continue to work, and both are not mutually interfered, are favorable to improving system operation reliability.
In some embodiments, the second circulation pipeline 9 is provided with a first control valve 10 for controlling the on-off of the second circulation pipeline 9. A first control valve 10 is provided on the second circulation line 9 for controlling the transfer of the organic amine adsorbent from the regeneration tower 3 to the anion exchange resin device 4. When the desalting treatment of the organic amine adsorbent is required, the desalting treatment can be performed by opening the first control valve 10 so that the organic amine adsorbent enters the anion exchange resin device 4 through the second circulation line 9. When the desalting treatment of the organic amine adsorbent is not required, the organic amine adsorbent can be returned to the adsorption tower 2 directly through the first feed pipe 8 by closing the first control valve 10 to perform the adsorption process. Therefore, the on-off of the second circulation pipeline 9 can be flexibly controlled according to actual demands so as to accurately control the flow path of the organic amine adsorbent, thereby realizing continuous transmission and cyclic utilization of the organic amine adsorbent, reducing unnecessary energy loss and improving the operation efficiency of the system.
In some embodiments, the second circulation line 9 is further provided with an activated carbon filter 11 and a microporous filter 12 upstream of the anion exchange resin device 4.
An activated carbon filter 11 is provided on the second circulation line 9 for removing large particle impurities and harmful substances from the organic amine adsorbent. A microporous filter 12 is provided on the second circulation line 9 after the activated carbon filter 11 for further removing small particle impurities and harmful substances from the organic amine adsorbent.
The organic amine adsorbent solution enters the anion exchange resin device 4 for desalination treatment after being pretreated by the activated carbon filter 11 and the microporous filter 12, so that impurities and harmful substances in the anion exchange resin device 4 can be reduced, the working efficiency and the service life of the anion exchange resin device 4 are improved, and the desalination effect is improved. It should be noted that during actual operation, the activated carbon filter 11 and the microporous filter 12 should be regularly checked and maintained to ensure their normal operation, and the filter material should be replaced according to circumstances to ensure the optimal filtering effect.
In some embodiments, the second circulation pipeline 9 is provided with a shunt pipe 13, an inlet of the shunt pipe 13 is positioned at the downstream of the anion exchange resin device 4, an outlet of the shunt pipe 13 is used for being connected with an organic amine absorbent storage device, and the shunt pipe 13 is provided with a second control valve 14 for controlling the on-off of the shunt pipe 13.
A shunt tube 13 is provided on the second circulation line 9, with its inlet downstream of the anion exchange resin device 4, for receiving a portion of the organic amine adsorbent subjected to the desalting treatment. The shunt tube 13 is provided with a second control valve 14 for controlling the on-off of the shunt tube 13, thereby realizing the accurate distribution of the organic amine adsorbent.
When it is desired to store a portion of the organic amine adsorbent, the organic amine adsorbent can be introduced into the organic amine adsorbent storage means through the shunt tube 13 by opening the second control valve 14. When the organic amine adsorbent does not need to be stored, the second control valve 14 can be closed, so that the organic amine adsorbent is directly returned to the first conveying pipe 8 through the second circulating pipeline 9 and enters the adsorption tower 2 for adsorption. The shunt pipes 13 and the second control valves 14 can realize accurate distribution of the organic amine adsorbent, so that the operation efficiency and the resource utilization rate of the system are improved.
In some embodiments, a second material conveying pipe 15 is arranged between the adsorption tower 2 and the regeneration tower 3, and is used for conveying the organic amine adsorbent which is saturated in adsorption in the adsorption tower 2 to the regeneration tower 3 for desorption and regeneration. The carbon capture amine liquid purification system 100 further includes a heat exchanger 16, where the heat exchanger 16 is connected to the first feed conveyor pipe 8 and the second feed conveyor pipe 15, respectively, for exchanging heat between the organic amine adsorbent flowing through the first feed conveyor pipe 8 and the organic amine adsorbent flowing through the second feed conveyor pipe 15.
The heat exchanger 16 is connected to the first feed conveyor pipe 8 and the second feed conveyor pipe 15, respectively, for exchanging heat between the organic amine adsorbent flowing through the first feed conveyor pipe 8 and the organic amine adsorbent flowing through the second feed conveyor pipe 15. During the heat exchange process, the organic amine absorbent flowing through the first feed conveyor pipe 8 may transfer heat to the organic amine absorbent flowing through the second feed conveyor pipe 15, thereby reducing its temperature and increasing its ability to absorb carbon dioxide. At the same time, the organic amine adsorbent flowing through the second feed conveyor pipe 15 may also transfer heat to the organic amine adsorbent flowing through the first feed conveyor pipe 8, thereby raising its temperature and promoting its release of adsorbed carbon dioxide.
Through the heat exchange process, the temperature of the organic amine adsorbent can be adjusted to be in an optimal working state, so that the adsorption efficiency is improved, and in addition, a part of heat carried by the organic amine adsorbent can be recovered, so that the energy consumption of a system is reduced.
In some embodiments, a cooler 17 is also provided on the first feed conveyor pipe 8 downstream of the heat exchanger 16 for cooling the organic amine adsorbent flowing through the first feed conveyor pipe 8. The cooler 17 is arranged to adjust the temperature of the organic amine adsorbent to further reduce the temperature of the organic amine adsorbent flowing through the first feed delivery pipe 8 to be in an optimal working state, thereby improving the adsorption efficiency.
The carbon capture amine liquid purification method according to the embodiment of the present invention is applied to the carbon capture amine liquid purification system 100 described in any of the above embodiments, including:
Washing the flue gas by using a washing liquid;
Adsorbing the washed flue gas by using an organic amine adsorbent;
desorbing and regenerating the saturated organic amine adsorbent;
removing anions in the desorbed and regenerated organic amine adsorbent by an anion exchange resin method;
and (3) taking part of alkaline wastewater generated by the anion exchange resin method as a washing liquid to wash the flue gas, and neutralizing the other part of alkaline wastewater generated by the anion exchange resin method with an acidic washing liquid after washing the flue gas.
The carbon trapping amine liquid purification method of the embodiment of the invention realizes the coupling of the traditional carbon trapping process and the purification of the ion exchange resin amine liquid, not only can remove the heat-stable salt in the organic amine adsorbent, but also can treat the alkaline wastewater generated in the regeneration process of the ion exchange resin. The method avoids the existence of heat stability salt in the organic amine adsorbent solution, and influences the adsorption capacity of the organic amine adsorbent on carbon dioxide, thereby improving the carbon trapping efficiency of the whole system. Solves the disposal problem of the alkaline wastewater purified by the amine liquid, realizes the recycling of resources, improves the efficiency and the economy of the system, and can also reduce the acidic pollutants such as SO2 and the like in the flue gas.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (10)
1. A carbon capture amine liquid purification system, comprising:
the washing tower is provided with a flue gas inlet, a flue gas outlet, a washing liquid inlet and a washing liquid outlet;
The adsorption tower is provided with a smoke inlet and a purified smoke outlet, the smoke inlet is communicated with the smoke outlet to receive the washed smoke discharged by the washing tower, an organic amine adsorbent is arranged in the adsorption tower and used for adsorbing carbon dioxide in the smoke, and the adsorbed smoke is discharged through the purified smoke outlet;
A regeneration tower for receiving the adsorption saturated organic amine adsorbent discharged from the adsorption tower and performing desorption regeneration, the regeneration tower having a regeneration gas outlet for discharging a regeneration gas;
The anion exchange resin device is used for removing anions in the organic amine adsorbent discharged from the regeneration tower and then conveying the organic amine adsorbent into the adsorption tower, the anion exchange resin device is provided with a regeneration liquid inlet and a waste water outlet, the regeneration liquid inlet is used for enabling alkaline regeneration liquid to enter the anion exchange resin device, and the waste water outlet is communicated with the washing liquid outlet so as to convey at least part of alkaline waste water generated by the anion exchange resin device into the washing tower as washing liquid.
2. The carbon capture amine liquor purification system of claim 1, comprising an acid-base neutralizer having an acid liquor inlet in communication with the wash liquor outlet, an alkali liquor inlet in communication with the waste water outlet, and a neutral liquor outlet, the acid-base neutralizer for neutralizing alkaline waste water produced by the anion exchange resin device with an acidic wash liquor produced by the wash column.
3. The carbon capture amine liquid purification system of claim 2, comprising a first circulation line and a first circulation pump, wherein an inlet and an outlet of the first circulation line are in communication with the wash liquid outlet and the wash liquid inlet, respectively, and the first circulation pump is disposed on the first circulation line.
4. The carbon capture amine liquid purification system of claim 1, wherein a first delivery pipe is arranged between the adsorption tower and the regeneration tower, and is used for delivering the organic amine adsorbent desorbed and regenerated in the regeneration tower into the adsorption tower for adsorption, a second circulation pipeline is arranged on the first delivery pipe, and the anion exchange resin device is arranged on the second circulation pipeline.
5. The carbon capture amine liquid purification system of claim 4, wherein the second circulation line is provided with a first control valve for controlling on-off of the second circulation line.
6. The carbon capture amine liquid purification system of claim 5, wherein the second circulation line is further provided with an activated carbon filter and a microporous filter upstream of the anion exchange resin device.
7. The carbon capture amine liquid purification system of claim 4, wherein a shunt tube is arranged on the second circulation pipeline, an inlet of the shunt tube is positioned at the downstream of the anion exchange resin device, an outlet of the shunt tube is used for being connected with an organic amine adsorbent storage device, and a second control valve for controlling the on-off of the shunt tube is arranged on the shunt tube.
8. The carbon capture amine liquid purification system of claim 4, wherein a second delivery pipe is arranged between the adsorption tower and the regeneration tower and is used for delivering the organic amine adsorbent which is adsorbed and saturated in the adsorption tower into the regeneration tower for desorption and regeneration;
The carbon capture amine liquid purification system further comprises a heat exchanger which is respectively connected with the first conveying pipe and the second conveying pipe and is used for exchanging heat between the organic amine adsorbent flowing through the first conveying pipe and the organic amine adsorbent flowing through the second conveying pipe.
9. The carbon capture amine liquid purification system of claim 8, wherein a cooler downstream of the heat exchanger is further provided on the first feed conduit for cooling the organic amine adsorbent flowing through the first feed conduit.
10. A carbon capture amine liquid purification method applied to the carbon capture amine liquid purification system as claimed in any one of claims 1 to 9, comprising:
Washing the flue gas by using a washing liquid;
Adsorbing the washed flue gas by using an organic amine adsorbent;
desorbing and regenerating the saturated organic amine adsorbent;
removing anions in the desorbed and regenerated organic amine adsorbent by an anion exchange resin method;
and (3) taking part of alkaline wastewater generated by the anion exchange resin method as a washing liquid to wash the flue gas, and neutralizing the other part of alkaline wastewater generated by the anion exchange resin method with an acidic washing liquid after washing the flue gas.
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| CN202410590929.8A CN118384675A (en) | 2024-05-13 | 2024-05-13 | Carbon capture amine liquid purification system and method |
| PCT/CN2025/080775 WO2025236822A1 (en) | 2024-05-13 | 2025-03-05 | Carbon capture amine liquid purification system and method |
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| CN118846786A (en) * | 2024-07-30 | 2024-10-29 | 中国华能集团清洁能源技术研究院有限公司 | Carbon capture organic pollutant automated treatment device and control method |
| CN118851500A (en) * | 2024-09-23 | 2024-10-29 | 中国华能集团清洁能源技术研究院有限公司 | A waste liquid treatment system for solution purification and recovery |
| CN119971718A (en) * | 2025-01-10 | 2025-05-13 | 国家能源集团新能源技术研究院有限公司 | A kind of online purification method and system of alcohol amine absorbent |
| WO2025236822A1 (en) * | 2024-05-13 | 2025-11-20 | 中国华能集团清洁能源技术研究院有限公司 | Carbon capture amine liquid purification system and method |
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| JP5584984B2 (en) * | 2009-03-18 | 2014-09-10 | 栗田エンジニアリング株式会社 | Regeneration method of amine liquid |
| CN102350177A (en) * | 2011-09-07 | 2012-02-15 | 航天环境工程有限公司 | Pneumatic trapping system and process for carbon dioxide (CO2) in smoke |
| CN103979716A (en) * | 2014-05-22 | 2014-08-13 | 西安热工研究院有限公司 | System and method for purification and reuse of amine liquid in flue gas CO2 capture system of coal-fired power station |
| KR102209400B1 (en) * | 2019-04-25 | 2021-02-01 | 주식회사 포스코 | Device for purification of coke oven gas and method for purification of coke oven gas |
| CN111729483A (en) * | 2020-07-23 | 2020-10-02 | 中国华电科工集团有限公司 | A carbon dioxide capture system and method |
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| CN115779637A (en) * | 2022-10-21 | 2023-03-14 | 中国华能集团清洁能源技术研究院有限公司 | Carbon dioxide capture system |
| CN117983039B (en) * | 2024-04-03 | 2024-06-04 | 西安超滤环保科技股份有限公司 | Amine liquid carbon trapping system and method |
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-
2024
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| WO2025236822A1 (en) * | 2024-05-13 | 2025-11-20 | 中国华能集团清洁能源技术研究院有限公司 | Carbon capture amine liquid purification system and method |
| CN118846786A (en) * | 2024-07-30 | 2024-10-29 | 中国华能集团清洁能源技术研究院有限公司 | Carbon capture organic pollutant automated treatment device and control method |
| CN118851500A (en) * | 2024-09-23 | 2024-10-29 | 中国华能集团清洁能源技术研究院有限公司 | A waste liquid treatment system for solution purification and recovery |
| CN118851500B (en) * | 2024-09-23 | 2024-12-13 | 中国华能集团清洁能源技术研究院有限公司 | Waste liquid treatment system for purifying and recycling solution |
| CN119971718A (en) * | 2025-01-10 | 2025-05-13 | 国家能源集团新能源技术研究院有限公司 | A kind of online purification method and system of alcohol amine absorbent |
| CN119971718B (en) * | 2025-01-10 | 2025-11-21 | 国家能源集团新能源技术研究院有限公司 | An online purification method and system for an alcohol amine absorbent |
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| WO2025236822A1 (en) | 2025-11-20 |
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