CN102698568A - Enhanced cooling and multistage regeneration carbon dioxide capture and regeneration system - Google Patents
Enhanced cooling and multistage regeneration carbon dioxide capture and regeneration system Download PDFInfo
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- CN102698568A CN102698568A CN2012101871778A CN201210187177A CN102698568A CN 102698568 A CN102698568 A CN 102698568A CN 2012101871778 A CN2012101871778 A CN 2012101871778A CN 201210187177 A CN201210187177 A CN 201210187177A CN 102698568 A CN102698568 A CN 102698568A
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Abstract
The invention discloses an enhanced cooling and multistage regeneration carbon dioxide capture and regeneration system, which comprises an absorption device, the output of the absorption device is divided into two paths, one path is communicated with a rich liquid inlet of a lean-rich liquid heat exchanger, and the other path is communicated with a first inlet of a regeneration tower; a rich liquid inlet of a rich liquid flash tank is communicated with a rich liquid outlet of the lean-rich liquid heat exchanger; a rich liquid outlet of the rich liquid flash tank is communicated with a second inlet of the regeneration tower; a lean liquid outlet at the bottom of the regeneration tower is communicated with a lean liquid inlet of the lean-rich liquid heat exchanger; a gas outlet on the top of the regeneration tower is communicated with a gas outlet on the top of the rich liquid flash tank and then is communicated with a gas inlet of a regenerated gas separator; and a liquid outlet of the regenerated gas separator is communicated with a lean liquid outlet of the lean-rich liquid heat exchanger and then is communicated with an inlet of the adsorption device. The system improves the desorption rate of carbon dioxide and the regeneration degree of a solution, reduces the temperature of a lean liquid entering the adsorption device, and improves the carbon dioxide capture efficiency of the lean liquid.
Description
Technical field
The present invention relates to flue gas collecting carbonic anhydride technical field, be specifically related to a kind of collecting carbonic anhydride regenerative system of strengthening cooling and multistage regeneration.
Background technology
In recent years, the pressure that global warming brings for government and energy enterprise increases rapidly, and a lot of western countries have begun to promote substantial decarburization work.Along with the reinforcement of China's carbon emission amount above the U.S. and the international cry that reduces discharging, power plant's collecting carbonic anhydride probably becomes required technology China's a middle or short term.China is thermal power generation more than 3/4 in the existing power station, does not also have commercial off-the-shelf IGCC power station now.So exploitation is fit to the pure amine absorption process of traditional power plant and catches carbon technique, is the most urgent demand.
The technology of utilizing alkanolamine solution from flue gas, to carry out collecting carbonic anhydride is ripe in chemical industry.But, because that generating plant flue gas has is large-minded, divide characteristics such as force down, it is that energy consumption is high that this technology applies to the maximum problem in power station, steam consumption is big.Reduce consumption, raise the efficiency, the large-scale promotion property that need improve this technology through the system and the subsystem of development of new.
Experimental study finds that for traditional collecting carbonic anhydride technology, solution can consume a large amount of steam in regenerative process; Cause system energy consumption big; And because regeneration is single, influence carbon dioxide desorb degree, 40% the carbon dioxide of still having an appointment can not get discharging and along with solution entering absorption tower; Cause the solution absorption ability not enough, reduced the capture load of carbon dioxide and the capture steam consumption of unit carbon dioxide on the whole.Simultaneously, purifying gas is being sent into regeneration overhead through the liquid after often will separating through high lift pump after the gas-liquid separation in the traditional handicraft, and its effect is to keep systematic water balance, reduces tower top temperature simultaneously, but has consumed more pump merit.
Summary of the invention
In order to overcome the shortcoming that above-mentioned prior art exists; The object of the present invention is to provide a kind of collecting carbonic anhydride regenerative system of strengthening cooling and multistage regeneration; Have the advantages that the cooling effect that makes full use of before the rich solution heat exchange and the carbon dioxide in the solution after the heat exchange are prone to separate out; Improve the desorption efficiency of carbon dioxide and the regeneration degree of solution, reduce getting into absorption plant lean solution temperature, improve the collecting carbonic anhydride efficient of lean solution.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of collecting carbonic anhydride regenerative system of strengthening cooling and multistage regeneration; Comprise absorption plant 5; The output of absorption plant 5 is divided into two-way; One the tunnel is communicated with the rich solution entrance pipe of poor rich liquid heat exchanger 1, and first entrance pipe of another road and regenerator 3 is communicated with, and rich solution flash tank 2 rich solutions enter the mouth and are communicated with poor rich liquid heat exchanger 1 rich solution export pipeline; Second entrance pipe of outlet of rich solution flash tank 2 rich solutions and regenerator 3 is communicated with; The outlet of regenerator 3 bottom lean solutions is communicated with poor rich liquid heat exchanger 1 lean solution inlet ductwork, and the outlet of regenerator 3 top gas is communicated with the gas access pipeline of regeneration gas separator 4 after outlet is communicated with rich solution flash tank 2 top gas again, and the lean solution of the liquid outlet of regeneration gas separator 4 and poor rich liquid heat exchanger 1 exports after the connection entrance pipe connection with absorption plant 5 again.
Said poor rich liquid heat exchanger 1 is board-like or shell-and-tube liquid-liquid heat exchanger.
Said regenerator 3 is filler or plate tower.
Compared with prior art, the present invention has the following advantages:
1, from the rich solution separated into two parts of absorption plant 5, wherein a road of flow directly gets into regenerator 3 tops, because this rich solution does not pass through heat exchange; Temperature is about 50～60 ℃; Can reduce tower top temperature after getting into regenerator 3 tops, reduce water evaporates, simultaneously because this part rich solution amount is less from tower; Also can make full use of the cat head waste heat and realize fully regeneration, resolve carbon dioxide.
2, another part rich solution then fully reclaims the heat of lean solution through poor rich liquid heat exchanger 1;, entering regenerator 3 at first passes through rich solution flash tank 2 before carrying out solution regeneration; The heat that utilize the to reclaim partial CO 2 gas of in rich solution flash tank 2, regenerating; The carbon dioxide that this part parses directly converges the back discharge with the regeneration gas that regenerator 3 ejects mouthful; Reduce the partial pressure of carbon dioxide in the regenerator 3, helped the further parsing of the carbon dioxide of solution, improved the desorption efficiency of carbon dioxide and the regeneration degree of solution.
3, further regeneration in the regenerator 3 of the rich solution of partial regeneration entering in rich solution flash tank 2.
4, after the process of the gas after regeneration regeneration gas separator 4 refrigerated separation, liquid mixes with lean solution with the lean solution outlet of poor rich liquid heat exchanger 1 through the gravity flow mode, sends into absorption plant 5 subsequently; Both solved owing to the part rich solution directly gets into rich solution flash tank 2 and caused the not enough problem of poor rich liquid heat exchanger 1 cooling load, also further reduced the lean solution temperature, improved the collecting carbonic anhydride efficient of lean solution in absorption plant; Reduced simultaneously and will separate the pump merit that back liquid is sent into regenerator 3 tops.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done more detailed explanation.
Shown in accompanying drawing; A kind of collecting carbonic anhydride regenerative system of strengthening cooling and multistage regeneration; Comprise absorption plant 5, the output of absorption plant 5 is divided into two-way, and one the tunnel is communicated with the rich solution entrance pipe of poor rich liquid heat exchanger 1; First entrance pipe of another road and regenerator 3 is communicated with; Rich solution flash tank 2 rich solutions inlet is communicated with poor rich liquid heat exchanger 1 rich solution export pipeline, and second entrance pipe of outlet of rich solution flash tank 2 rich solutions and regenerator 3 is communicated with, and regenerator 3 bottom lean solution outlets and poor rich liquid heat exchanger 1 lean solution inlet ductwork are communicated with; Regenerator 3 top gas outlets is communicated with the gas access pipeline of regeneration gas separator 4 after outlet is communicated with rich solution flash tank 2 top gas again, after the lean solution outlet connection of the liquid outlet of regeneration gas separator 4 and poor rich liquid heat exchanger 1 again with the entrance pipe connection of absorption plant 5.
Said poor rich liquid heat exchanger 1 is board-like or shell-and-tube liquid-liquid heat exchanger.
Said regenerator 3 is filler or plate tower.
Operation principle of the present invention does;
From the rich solution separated into two parts of absorption plant 5, wherein one the tunnel directly get into regenerator 3 tops, because this rich solution does not pass through heat exchange; Temperature is about 50～60 ℃, and the entering regenerator can reduce tower top temperature behind 3 tops, reduces water evaporates from tower; Simultaneously because this part rich solution amount is less; Also can make full use of the cat head waste heat and realize fully regeneration, resolve carbon dioxide, another part rich solution then fully reclaims the heat of lean solution through poor rich liquid heat exchanger 1;, entering regenerator 3 at first passes through rich solution flash tank 2 before carrying out solution regeneration; The regeneration gas that the heat that utilize the to reclaim partial CO 2 gas of in rich solution flash tank 2, regenerating, the carbon dioxide that this part parses directly eject mouthful with regenerator 3 converges the back and discharges, and reduced the interior partial pressure of carbon dioxide of regenerator 3.The rich solution of partial regeneration gets into further regeneration in the regenerator 3 in rich solution flash tank 2.At last, after gas process regeneration gas separator 4 refrigerated separation after the regeneration, the lean solution outlet that liquid is admitted to poor rich liquid heat exchanger 1 mixes with lean solution, sends into absorption plant 5 subsequently; Both solved owing to the part rich solution directly gets into rich solution flash tank 2 and caused the not enough problem of poor rich liquid heat exchanger 1 cooling load, also further reduced the lean solution temperature, improved the collecting carbonic anhydride efficient of lean solution in absorption plant.
Claims (3)
1. strengthen the cooling and the collecting carbonic anhydride regenerative system of multistage regeneration for one kind; Comprise absorption plant (5); It is characterized in that: the output of absorption plant (5) is divided into two-way; One the road and the rich solution entrance pipe of poor rich liquid heat exchanger (1) be communicated with; First entrance pipe of another road and regenerator (3) is communicated with; Rich solution flash tank (2) rich solution inlet is communicated with poor rich liquid heat exchanger (1) rich solution export pipeline, and second entrance pipe of outlet of rich solution flash tank (2) rich solution and regenerator (3) is communicated with, and lean solution outlet of regenerator (3) bottom and poor rich liquid heat exchanger (1) lean solution inlet ductwork are communicated with; Regenerator (3) top gas outlet is communicated with the gas access pipeline of regeneration gas separator (4) after outlet is communicated with rich solution flash tank (2) top gas again, after the lean solution outlet connection of the liquid outlet of regeneration gas separator (4) and poor rich liquid heat exchanger (1) again and the connection of the entrance pipe of absorption plant (5).
2. a kind of collecting carbonic anhydride regenerative system of strengthening cooling and multistage regeneration according to claim 1, it is characterized in that: said poor rich liquid heat exchanger (1) is board-like or shell-and-tube liquid-liquid heat exchanger.
3. a kind of collecting carbonic anhydride regenerative system of strengthening cooling and multistage regeneration according to claim 1, it is characterized in that: said regenerator (3) is filler or plate tower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101871778A CN102698568A (en) | 2012-06-07 | 2012-06-07 | Enhanced cooling and multistage regeneration carbon dioxide capture and regeneration system |
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| CN2012101871778A CN102698568A (en) | 2012-06-07 | 2012-06-07 | Enhanced cooling and multistage regeneration carbon dioxide capture and regeneration system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657381A (en) * | 2013-11-25 | 2014-03-26 | 中石化石油工程设计有限公司 | Flue gas pretreatment and carbon dioxide collecting, purifying and recycling device |
| CN103961979A (en) * | 2014-04-28 | 2014-08-06 | 中国华能集团清洁能源技术研究院有限公司 | Multistage division regenerative carbon dioxide trapping system and technology |
| CN105889755A (en) * | 2016-05-29 | 2016-08-24 | 济南科慧页岩化工技术有限公司 | System and method for capturing and utilizing CO2 generated in metallurgical process |
| CN110538544A (en) * | 2019-09-25 | 2019-12-06 | 成都赛普瑞兴科技有限公司 | decarbonization device |
| CN113877365A (en) * | 2020-07-03 | 2022-01-04 | 中石化石油工程技术服务有限公司 | CO2Trapping system and process |
| CN114632402A (en) * | 2020-12-16 | 2022-06-17 | 中冶京诚工程技术有限公司 | Flue gas carbon dioxide capture system and capture method |
| WO2022242317A1 (en) * | 2021-05-20 | 2022-11-24 | 中国华电科工集团有限公司 | Carbon dioxide capture system for rich liquid flash-evaporation and regeneration waste heat recovery |
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| EP0945162A1 (en) * | 1998-03-23 | 1999-09-29 | Mitsubishi Heavy Industries, Ltd. | Process and system for the removal of carbon dioxide present in gases |
| CN1371893A (en) * | 2001-02-19 | 2002-10-02 | 张文慧 | Technological process and apparatus for preparing enriched methane gas by utilizing refuse marsh gas |
| CN101721883A (en) * | 2008-10-23 | 2010-06-09 | 株式会社日立制作所 | Method and device for removing CO2 and H2S |
| CN201578973U (en) * | 2009-12-14 | 2010-09-15 | 华能集团技术创新中心 | Flue gas carbon dioxide capturing equipment and absorption tower thereof |
| CN202605989U (en) * | 2012-06-07 | 2012-12-19 | 中国华能集团清洁能源技术研究院有限公司 | Carbon dioxide capture and regeneration device |
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Patent Citations (5)
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| EP0945162A1 (en) * | 1998-03-23 | 1999-09-29 | Mitsubishi Heavy Industries, Ltd. | Process and system for the removal of carbon dioxide present in gases |
| CN1371893A (en) * | 2001-02-19 | 2002-10-02 | 张文慧 | Technological process and apparatus for preparing enriched methane gas by utilizing refuse marsh gas |
| CN101721883A (en) * | 2008-10-23 | 2010-06-09 | 株式会社日立制作所 | Method and device for removing CO2 and H2S |
| CN201578973U (en) * | 2009-12-14 | 2010-09-15 | 华能集团技术创新中心 | Flue gas carbon dioxide capturing equipment and absorption tower thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657381A (en) * | 2013-11-25 | 2014-03-26 | 中石化石油工程设计有限公司 | Flue gas pretreatment and carbon dioxide collecting, purifying and recycling device |
| CN103657381B (en) * | 2013-11-25 | 2015-06-10 | 中石化石油工程设计有限公司 | Flue gas pretreatment and carbon dioxide collecting, purifying and recycling device |
| CN103961979A (en) * | 2014-04-28 | 2014-08-06 | 中国华能集团清洁能源技术研究院有限公司 | Multistage division regenerative carbon dioxide trapping system and technology |
| CN105889755A (en) * | 2016-05-29 | 2016-08-24 | 济南科慧页岩化工技术有限公司 | System and method for capturing and utilizing CO2 generated in metallurgical process |
| CN110538544A (en) * | 2019-09-25 | 2019-12-06 | 成都赛普瑞兴科技有限公司 | decarbonization device |
| CN113877365A (en) * | 2020-07-03 | 2022-01-04 | 中石化石油工程技术服务有限公司 | CO2Trapping system and process |
| CN114632402A (en) * | 2020-12-16 | 2022-06-17 | 中冶京诚工程技术有限公司 | Flue gas carbon dioxide capture system and capture method |
| CN114632402B (en) * | 2020-12-16 | 2022-11-11 | 中冶京诚工程技术有限公司 | Trapping method of flue gas carbon dioxide trapping system |
| WO2022242317A1 (en) * | 2021-05-20 | 2022-11-24 | 中国华电科工集团有限公司 | Carbon dioxide capture system for rich liquid flash-evaporation and regeneration waste heat recovery |
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Application publication date: 20121003 |