CN201949778U - System for catching acid gas in flue gas - Google Patents
System for catching acid gas in flue gas Download PDFInfo
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- CN201949778U CN201949778U CN2011200541288U CN201120054128U CN201949778U CN 201949778 U CN201949778 U CN 201949778U CN 2011200541288 U CN2011200541288 U CN 2011200541288U CN 201120054128 U CN201120054128 U CN 201120054128U CN 201949778 U CN201949778 U CN 201949778U
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Abstract
The utility model relates to a system suitable for catching acid gas in a coal-fired power plant by using a flue gas chemical absorption method. The system comprises an absorption tower, a barren-rich liquid heat exchanger, a regeneration tower, a reboiler and a gas-liquid separator, wherein a liquid film concentration device is arranged, so that a part of moisture is removed from rich liquid is the liquid film concentration device before the rich liquid enters the barren-rich liquid heat exchanger, the consumption of excessive energy caused by heating excessive moisture in an unnecessary solution during regeneration of the rich liquid is avoided. Removed water is combined with barren liquid flowing out of the regeneration tower, and the mixture enters the upper part of the absorption tower for spraying and recycling, so that the energy consumption of the entire system is effectively lowered.
Description
Technical field
The utility model relates to a kind of chemical purifying system of flue gas, is specifically related to a kind of coal-fired plant flue gas chemical absorption method that is applicable to and captures the system of sour gas.
Background technology
Gases such as the carbon dioxide that sour gas mainly refers to produce in the coal conversion process, oxysulfide, nitrogen oxide, hydrogen sulfide, carbon dioxide is the main arch-criminal who causes present greenhouse effects, oxysulfide forms acid rain in the rainy day, and is huge to the infringement of ground trees and building.Current, the reduction of discharging of sour gas has become one of environmental issue that national governments, academia and even business circles all very pay close attention to.Use yet carbon dioxide has widely at basic industry, sugar industry, welding field, so the carbon capture is a grand strategy selection of China's reply climate change with sealing up for safekeeping.Thermal power plant is the main concentrated emission source of sour gas, wants to cut down on a large scale CO2 emission future, must put forth effort on from coal fired power plant capturing.
The carbon of coal fired power plant captures and divides three kinds of technology paths, the burning back captures, burning is preceding captures and oxygen-enriched combustion technology, also there are many technical barriers in both in view of the back, and current research and development and Demonstration Application technology mostly are burning back trapping technique, and it can be directly applied for existing most thermal power plant.
The discharging flue gas of existing coal-burning power plant is bordering on atmospheric pressure, and wherein gas concentration lwevel generally is lower than 15%, and therefore, therefrom the thermodynamic driving force of separating carbon dioxide is lower, and this isolation technics to the exploitation economical and efficient is a kind of challenge.Research and development and Demonstration Application are more at present is the hydramine method, its essence is the acid-base neutralization reaction, weak acid (carbon dioxide) and weak base (amine in the aqueous solution) reaction generates water-soluble salt, this makes the amine method to catch carbon dioxide in the flue gas of low branch voltage levels, limited by molecular balance but absorb load.It is reversible that this acid-base reaction varies with temperature, generally form salt about 40 ℃, carbon dioxide is absorbed, and at the reverse carbon dioxide of emitting of reaction more than 100 ℃, thereby utilize absorption tower and regenerator composition system can finish capture to carbon dioxide, application number is that 200810018343.5 patent of invention discloses above-mentioned technical characterictic, but these apparatus and method are owing to the content very high (＞60%) of water in the circulating absorption solution, too much moisture in the heated solution and consume excessive power, it periodically heats up, lowering the temperature makes system energy consumption too high.
The utility model content
The technical problems to be solved in the utility model provides a kind of sour gas trapping system that can effectively reduce system energy consumption.
The utility model sour gas trapping system, comprise booster fan, absorption tower, liquid film enrichment facility, poor rich liquid heat exchanger, regenerator, reboiler, also comprise regeneration gas cooler, gas-liquid separator and other a series of coolers, pump and relevant auxiliary equipment.The connected mode of this system is: bottom, absorption tower liquid outlet links to each other with the absorption liquid import of liquid film enrichment facility by pump, the concentrated solution outlet of liquid film enrichment facility is connected with the rich solution import of rich or poor liquid heat exchanger by pump, the water export of liquid film enrichment facility is connected with the outlet of the lean solution of rich or poor liquid heat exchanger, the rich solution outlet of rich or poor liquid heat exchanger links to each other with regenerator top first inlet, regenerator bottom liquid outlet is connected with the lean solution import of rich or poor liquid heat exchanger, and the lean solution outlet of rich or poor liquid heat exchanger links to each other with the absorption liquid inlet at top, absorption tower with the lean solution cooler by pump.
The utility model sour gas trapping system wherein is provided with washing section and demister at the top on described absorption tower, and the liquid outlet of washing section links to each other with the washing section inlet with the cleaning solution cooler by pump, and demister places between washing section and the tail gas evacuation port.
The utility model sour gas trapping system, the exhaust outlet of wherein said regenerator links to each other with the import of gas-liquid separator by the regeneration gas cooler, and the liquid outlet of gas-liquid separator is connected with top second inlet of regenerator by pump.Reboiler can place the inside or the outside of regenerator.
The method of utilizing the utility model sour gas trapping system to capture sour gas is: the flue gas of coal-burning power plant is in the preliminary treatment (dedusting through necessity, cooling) after, after boosting, booster fan enters from the bottom, absorption tower, flue gas from bottom to top with from top, absorption tower spray and the formation of organic amine solution down counter current contacting, the flue gas that has removed sour gas is discharged through the tail gas evacuation port, the organic amine solution (rich solution) that has absorbed sour gas enters the liquid film enrichment facility by the pump pressurization, portion of water in the rich solution from coming out, is obtained further concentrated rich solution and down sprays from the regenerator top after the pump pressurization is by rich or poor liquid heat exchanger exchange heat.The reboiler of regenerator bottom utilizes the rich solution of power plant's low-pressure steam under rising the lean solution ebuillition of heated vaporization of regenerator bottom with spraying to contact and discharges sour gas, sour gas flows out through regeneration overhead with a large amount of steam and a small amount of organic amine steam, steam and organic amine steam are condensed into liquid solution and are separated in gas-liquid separator are sent back to regenerator again after pump pressurization in the regeneration gas cooler, and sour gas then is sent to air compressor machine and is compressed liquefaction in order to follow-up precision processing utilization or carry toward sour gas and seal the place up for safekeeping.Being heated the organic amine solution (lean solution) that parses behind a certain amount of sour gas in regenerator goes out from the regenerator underflow, after rich or poor liquid heat exchanger is with the heat transferred rich solution, flow with the hydration that the liquid film enrichment facility is trapped out, through being pumped into the lean solution cooler, cooled lean solution enters top, absorption tower spray once more, and is recycling.
The utility model sour gas trapping system, be provided with washing section and demister at the top on described absorption tower, removed carry the steam that partially absorbs solute in the clean flue gas of sour gas must be at washing section through cold water washing, the clean flue gas after washing and foam removal can directly or through chimney enter atmosphere.Cleaning solution can be recycled, and the washing section that reenters the top, absorption tower behind pump and cleaning solution cooler washs flue gas.
The liquid film enrichment facility is meant and is utilizing principle of reverse osmosis, filter film technology etc. can hold back salt and organic molecule in the utility model, and the solution separation, purification, the enrichment facility that allow hydrone to pass through can be the employed membrane for water treatment devices of water treatment field.
CO
2, SO
2Generate unsettled salt at low temperatures Deng sour gas and weak base (organic amine solution), high temperature is the reverse sour gas of separating out of reaction down.SO
2Belong to highly acid gas, in weak caustic solution, SO
2Prior to CO
2Produce unstable salt with weak base (organic amine) reaction, high temperature is the reverse SO that separates out of reaction down
2, therefore, can selectively capture SO by the different preliminary treatment of flue gas
2The utility model is equally applicable to the absorption and the capture of other sour gas that the coal-burning power plant discharges.
The beneficial effects of the utility model are: owing to introduced the liquid film enrichment facility, the liquid film enrichment facility is between absorption tower and rich or poor liquid heat exchanger, before entering rich or poor liquid heat exchanger, rich solution concentrate to remove the regenerator of entering again behind the part moisture by the liquid film enrichment facility, water that concentrates out and lean solution interflow enter the absorption tower, and be recycling.Heat too much moisture in the unnecessary solution when having avoided rich solution regeneration and consume excessive power, make the whole system energy consumption reduce.
The top on absorption tower is provided with washing section and demister, makes the flue gas environmental protection more that enters atmosphere, reduces air pollution, and cleaning solution can recycle, further energy-saving and emission-reduction.
The native system flow scheme design rationally, compact conformation, treatment effect is good, energy consumption is low, is fit to apply.
Description of drawings
Fig. 1 is the utility model sour gas trapping system schematic diagram.
The specific embodiment
Composition and connected mode embodiment below in conjunction with this system further set forth the utility model.
As shown in Figure 1, booster fan 1 links to each other with absorption tower 2 bottom air inlets, and 2 bottoms, absorption tower are by the absorption liquid import A of pump and liquid film enrichment facility 3
1Be connected the concentrated solution outlet A of liquid film enrichment facility 3
2Rich solution import B by pump and poor rich liquid heat exchanger 4
1Be connected the water export A of liquid film enrichment facility 3
3Lean solution outlet B with poor rich liquid heat exchanger 4
4Be connected the rich solution outlet B of poor rich liquid heat exchanger 4
2With the regenerator 5 tops first inlet D
1Link to each other the lean solution import B of regenerator 5 bottom liquid outlets and rich or poor liquid heat exchanger 4
3Be connected the lean solution outlet B of rich or poor liquid heat exchanger 4
4Absorption liquid inlet C by pump and lean solution cooler 7 and 2 tops, absorption tower
1Link to each other, the top on absorption tower 2 is provided with washing section and demister, the liquid outlet C of washing section
3By pump and cleaning solution cooler 8 and washing section inlet C
2Link to each other, demister places between washing section and the tail gas evacuation port 11, the exhaust outlet of regenerator links to each other with the import of gas-liquid separator 10 by regeneration gas cooler 9, the liquid outlet of gas-liquid separator 10 is connected with the top second inlet D2 of regenerator 5 by pump, and reboiler 6 places the outside of regenerator 5.
Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (4)
1. sour gas trapping system in the flue gas, comprise absorption tower (2), rich or poor liquid heat exchanger (4), regenerator (5), reboiler (6), gas-liquid separator (10), the top on absorption tower (2) is provided with tail gas evacuation port (11), the rich solution import (B of absorption tower (2) bottom liquid outlet and rich or poor liquid heat exchanger (4)
1) be connected the rich solution outlet (B of rich or poor liquid heat exchanger (4)
2) and regenerator (5) the top first inlet (D
1) link to each other the lean solution import (B of regenerator (5) bottom liquid outlet and rich or poor liquid heat exchanger (4)
3) be connected the lean solution outlet (B of rich or poor liquid heat exchanger (4)
4) by the absorption liquid inlet (C of lean solution cooler (7) with top, absorption tower (2)
1) be connected, it is characterized in that between absorption tower (2) bottom liquid outlet and rich or poor liquid heat exchanger (4), also being provided with liquid film enrichment facility (3), the absorption liquid import (A of liquid film enrichment facility (3)
1) be connected the concentrated solution outlet (A of liquid film enrichment facility (3) with absorption tower (2) bottom liquid outlet
2) with the rich solution import (B of rich or poor liquid heat exchanger (4)
1) be connected the water export (A of liquid film enrichment facility (3)
3) with the lean solution of rich or poor liquid heat exchanger (4) outlet (B
4) be connected.
2. sour gas trapping system in the flue gas according to claim 1 is characterized in that: the top of described absorption tower (2) is provided with washing section and demister, the liquid outlet (C of washing section
3) by cleaning solution cooler (8) and washing section inlet (C
2) link to each other, demister places between washing section and the tail gas evacuation port (11).
3. sour gas trapping system in the flue gas according to claim 1 and 2, it is characterized in that: the exhaust outlet of described regenerator (5) links to each other the top second inlet (D of the liquid outlet of gas-liquid separator (10) and regenerator (5) by regeneration gas cooler (9) with the import of gas-liquid separator (10)
2) be connected.
4. sour gas trapping system in the flue gas according to claim 1 is characterized in that: described reboiler (6) places the outside of regenerator (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200541288U CN201949778U (en) | 2011-03-03 | 2011-03-03 | System for catching acid gas in flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200541288U CN201949778U (en) | 2011-03-03 | 2011-03-03 | System for catching acid gas in flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201949778U true CN201949778U (en) | 2011-08-31 |
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ID=44493907
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200541288U Expired - Lifetime CN201949778U (en) | 2011-03-03 | 2011-03-03 | System for catching acid gas in flue gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102133499A (en) * | 2011-03-03 | 2011-07-27 | 杨东 | System and method for trapping acid gas in smoke |
| CN103497802A (en) * | 2013-09-29 | 2014-01-08 | 银川天佳仪器仪表有限公司 | Device for removing acid gas in natural gas |
| CN104535723A (en) * | 2014-12-25 | 2015-04-22 | 华能国际电力股份有限公司 | Testing system of variable-working-condition thick paste type carbon dioxide capture process |
| CN109908700A (en) * | 2017-12-12 | 2019-06-21 | 万华化学集团股份有限公司 | A kind of exhaust gas recovery system and method for neopentyl glycol process units |
-
2011
- 2011-03-03 CN CN2011200541288U patent/CN201949778U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102133499A (en) * | 2011-03-03 | 2011-07-27 | 杨东 | System and method for trapping acid gas in smoke |
| CN103497802A (en) * | 2013-09-29 | 2014-01-08 | 银川天佳仪器仪表有限公司 | Device for removing acid gas in natural gas |
| CN103497802B (en) * | 2013-09-29 | 2016-03-02 | 银川天佳能源科技股份有限公司 | A kind of device of Sweet natural gas depickling gas |
| CN104535723A (en) * | 2014-12-25 | 2015-04-22 | 华能国际电力股份有限公司 | Testing system of variable-working-condition thick paste type carbon dioxide capture process |
| CN109908700A (en) * | 2017-12-12 | 2019-06-21 | 万华化学集团股份有限公司 | A kind of exhaust gas recovery system and method for neopentyl glycol process units |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Longyuan Environment Protection Engineering Co., Ltd. Assignor: Yang Dong|He Qiang|Chen Yule Contract record no.: 2014990000396 Denomination of utility model: System and method for trapping acid gas in smoke Granted publication date: 20110831 License type: Exclusive License Record date: 20140610 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110831 |
|
| CX01 | Expiry of patent term |