CN102351219A - Carbon dioxide removal method of combined alkali making method - Google Patents
Carbon dioxide removal method of combined alkali making method Download PDFInfo
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- CN102351219A CN102351219A CN2011101781090A CN201110178109A CN102351219A CN 102351219 A CN102351219 A CN 102351219A CN 2011101781090 A CN2011101781090 A CN 2011101781090A CN 201110178109 A CN201110178109 A CN 201110178109A CN 102351219 A CN102351219 A CN 102351219A
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- tower
- carbon dioxide
- decarbonizing
- carbonic acid
- acid gas
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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
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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
- 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
Abstract
The invention belongs to the technical field of a combined alkali making method, and specially, relates to a carbon dioxide removal method of the combined alkali making method. The carbon dioxide removal method comprises the following steps that a mother solution obtained from decarburization tower outlet liquid by removal of solid sodium bicarbonate is divided into a part A1 and a part A2; the part A1 is mixed directly with an ammonium chloride-free mother solution B obtained by an ammonium chloride output process in a mixer; and the mixture obtained by the previous step is subjected to ammonia absorption and cooling, and then is fed into a decarburization tower to be utilized as a decarburization solution for removal carbon dioxide. Through the carbon dioxide removal method, a decarburization solution in a decarburization tower can normally undergo a carbon dioxide removal reaction from feeding to output in the condition of no cooling-type heat transfer, in other words, in the condition of no built-in or external cooler in the decarburization tower. Through the carbon dioxide removal method, a decarburization tower does not scab and is not blocked so that the decarburization tower can stable run in a long term, wherein a working period is more than 60 days. Through the carbon dioxide removal method, a carbon dioxide utilization rate reaches above 99.6%.
Description
Technical field
The invention belongs to the soda and sociation center technical field, relate in particular to the removal methods of carbonic acid gas in the soda and sociation center.
Background technology
Utilize decarbonizing liquid that carbonic acid gas is removed in the conventional soda and sociation center; Decarbonizing liquid uses is the ammonia mother liquor after the mother liquor of separating ammonium chloride is inhaled ammonia; The temperature of decarbonizing liquid is 28～40 ℃; For guaranteeing that decarbonizing tower can normally remove the reaction of carbonic acid gas; Need be in decarbonizing tower inside or the outer setting water cooler; The decarbonizing liquid in the decarbonizing tower and the water cooler heat exchange of inside or outer setting are cooled; The resultant of reaction sodium hydrogencarbonate when being subjected to heat exchange bigger temperature difference influence be prone to quicken to separate out at decarbonizing tower and cooler surface; Deposition; Cause decarbonizing tower and water cooler to scab; Stop up; The cycle of operation is short; Cause the decreasing ratio of carbonic acid gas low on the whole, bring hidden danger for the long period smooth running.
Summary of the invention
The present invention is in order to solve weak point of the prior art, but the removal methods of carbonic acid gas in the high soda and sociation center of a kind of decarbonizing tower smooth long term running, CO2 removal efficient is provided.
The present invention adopts following technical scheme:
The removal methods of carbonic acid gas in a kind of soda and sociation center; The mother liquor that decarbonizing tower is gone out behind the tower liquid separate solid sodium hydrogencarbonate is divided into two portions A1 and A2; Mother liquor B behind A1 and the separating ammonium chloride that goes out the ammonium chloride operation directly mixes in mixing tank, inhales ammonia and cooling back then and gets into decarbonizing tower and remove carbonic acid gas as decarbonizing liquid.
The volume ratio of A1 and B is 0.6～1.6:1.
A1 mixes with B and inhales ammonia postcooling to 18～24 ℃ better.
A2 goes the ammonium chloride production process after inhaling ammonia.
The isolated solid sodium bicarbonate of tower liquid that goes out of decarbonizing tower gets into the yellow soda ash production process.
The invention provides in a kind of soda and sociation center the removal methods of carbonic acid gas in the industrial gasses, go out the mother liquor (note is made B) behind the separating ammonium chloride of ammonium chloride operation, temperature is 15～18 ℃, does not directly get into mixing tank with other medium heat exchange; The separation decarbonizing tower goes out the mother liquor behind the solid sodium bicarbonate in the tower liquid (temperature is 34～44 ℃) and is divided into two portions; First part's mother liquor (note is made A1) gets into mixing tank; A1 and B A1:B=0.6～1.6:1 by volume mix; Mixed liquid called after mixed solution (26～32 ℃ of temperature); Mixed solution goes ammonia absorber to inhale ammonia; Mixed solution is inhaled behind the ammonia as decarbonizing liquid; Decarbonizing liquid and refrigerating unit heat exchange are cooled; Cooled decarbonizing liquid temperature is 18～24 ℃, gets into decarbonizing tower and removes the carbonic acid gas in the industrial gasses.Do not participate in blended second section mother liquor (note is made A2) and go ammonia absorber to inhale ammonia, the liquid (48～52 ℃ of temperature) behind the suction ammonia gets into the Production of Ammonium Chloride operation.The tower liquid that goes out of decarbonizing tower gets into Alkali-filter separate solid sodium hydrogencarbonate, and sodium hydrogencarbonate gets into the yellow soda ash production process.
Adopt the inventive method to remove the decarbonizing liquid volume of equivalent carbonic acid gas: conventional soda and sociation center removes the decarbonizing liquid volume=1.6～2.6:1 of equivalent carbonic acid gas.
The amount those skilled in the art that inhale ammonia in the method can adjust according to the amount of the carbonic acid gas that specifically will remove.
The present invention removes the volume of the decarbonizing liquid of equivalent carbonic acid gas, the temperature of reduction decarbonizing liquid through increase; Thereby reduce the sensible heat of the decarbonizing liquid that gets into decarbonizing tower; Decarbonizing liquid in the decarbonizing tower no longer need adopt type of cooling heat exchange from going into tower to the entire reaction course that goes out tower; Avoid causing the resultant of reaction sodium hydrogencarbonate in decarbonizing tower and cooler surface deposition, thereby guarantee that decarbonizing tower can normally remove the reaction of carbonic acid gas under the situation that internal or external water cooler is not set because of heat exchange causes the bigger temperature difference.
Adopt technique scheme, can reach following beneficial effect:
Adopt the present invention to remove the method for carbonic acid gas, decarbonizing tower can normally remove the reaction of carbonic acid gas under the situation that internal or external water cooler is not set.Because decarbonizing tower do not scab, stops up, so decarbonizing tower can the long period smooth running, reaches working cycle more than 60 days.The good absorbing effect of carbonic acid gas, utilization ratio can reach more than 99.6%, and the follow-up production that can be used for yellow soda ash.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
The removal methods of carbonic acid gas in a kind of soda and sociation center, flow process go out the mother liquor B behind the separating ammonium chloride of ammonium chloride operation as shown in Figure 1, and with other medium heat exchange, temperature is not: 15～18 ℃, get into mixing tank 1; Alkali-filter 2 separation decarbonizing towers 3 go out the mother liquor behind the solid sodium bicarbonate in the tower liquid (34～44 ℃ of temperature) and are divided into two portions; The mother liquor A1 of first part gets into mixing tank 1; A1 and mother liquor B 0.6～1.6:1 by volume mix; Mixed liquid (temperature 26-32 ℃) goes ammonia absorber 4 to inhale ammonia; Be cooled as decarbonizing liquid and refrigerating unit 5 heat exchange after inhaling ammonia; Cooled decarbonizing liquid temperature is 18～24 ℃, gets into decarbonizing tower 3, removes the carbonic acid gas in the industrial gasses.Do not participate in blended second section mother liquor A2, go ammonia absorber 6 to inhale ammonia, the liquid (48～52 ℃) behind the suction ammonia gets into the Production of Ammonium Chloride operation.The tower liquid that goes out of decarbonizing tower 3 gets into Alkali-filter 2 separate solid sodium hydrogencarbonates, and sodium hydrogencarbonate gets into the yellow soda ash production process.Recycling Mother Solution is used.
Embodiment 1
4.6 meters of decarbonizing tower tower diameters, 42 meters of decarbonizing tower tower heights, decarbonizing liquid gets into decarbonizing tower by top; Go out tower liquid and go out decarbonizing tower by the bottom; Carbonated content is that 96% industrial gasses get into decarbonizing tower by the bottom, and the gas that removes behind the carbonic acid gas goes out decarbonizing tower by the top, and the CO2 removal rate is 99.7%.
Mother liquor A1: mother liquor B=1:1 (volume ratio) mixes, inhales the cooled decarbonizing liquid temperature of ammonia is 20 ℃, and flow is: 242.5m
3/ h, composition sees the following form:
Remove isopyknic carbonic acid gas, the used decarbonizing liquid of present embodiment: the volume ratio of conventional carbon dioxide eliminating technology (is example with the background technology) decarbonizing liquid is 2:1.
Embodiment 2
4.6 meters of decarbonizing tower tower diameters, 42 meters of decarbonizing tower tower heights, decarbonizing liquid gets into decarbonizing tower by top; Go out tower liquid and go out decarbonizing tower by the bottom; Carbonated content is that 85% industrial gasses get into decarbonizing tower by the bottom, and the gas that removes behind the carbonic acid gas goes out decarbonizing tower by the top, and the CO2 removal rate is 99.6%.
Mother liquor A1: mother liquor B=0.6:1 (volume ratio) mixes, inhales the cooled decarbonizing liquid temperature of ammonia is 18 ℃, and flow is: 194 m
3/ h, composition sees the following form:
Remove isopyknic carbonic acid gas, the used decarbonizing liquid of present embodiment: the volume ratio of conventional carbon dioxide eliminating technology (is example with the background technology) decarbonizing liquid is 1.6:1.
Embodiment 3
4.6 meters of decarbonizing tower tower diameters; 42 meters of decarbonizing tower tower heights; Decarbonizing liquid gets into decarbonizing tower by top; Go out tower liquid and go out decarbonizing tower by the bottom; Carbonated content is that 27.6% industrial gasses get into decarbonizing tower by the bottom; The gas that removes behind the carbonic acid gas goes out decarbonizing tower by the top, and the CO2 removal rate is 99.8%.
Mother liquor A1: mother liquor B=1.6:1 (volume ratio) mixes, inhales the cooled decarbonizing liquid temperature of ammonia is 22 ℃, and flow is: 315.3 m
3/ h, composition sees the following form:
Remove isopyknic carbonic acid gas, the used decarbonizing liquid of present embodiment: the volume ratio of conventional carbon dioxide eliminating technology (is example with the background technology) decarbonizing liquid is 2.6:1.
Claims (5)
1. the removal methods of carbonic acid gas in the soda and sociation center; It is characterized in that; The mother liquor that decarbonizing tower is gone out behind the tower liquid separate solid sodium hydrogencarbonate is divided into two portions A1 and A2; Mother liquor B behind A1 and the separating ammonium chloride that goes out the ammonium chloride operation directly mixes in mixing tank, inhales ammonia and cooling back then and gets into decarbonizing tower and remove carbonic acid gas as decarbonizing liquid.
2. the removal methods of carbonic acid gas is characterized in that in the soda and sociation center as claimed in claim 1, and the volume ratio of A1 and B is 0.6～1.6:1.
3. the removal methods of carbonic acid gas is characterized in that in the soda and sociation center as claimed in claim 2, and A1 mixes with B and inhales ammonia postcooling to 18～24 ℃.
4. the removal methods of carbonic acid gas is characterized in that in the soda and sociation center as claimed in claim 3, and A2 goes the ammonium chloride production process after inhaling ammonia.
5. the removal methods of carbonic acid gas is characterized in that in the soda and sociation center as claimed in claim 3, and the isolated solid sodium bicarbonate of tower liquid that goes out of decarbonizing tower gets into the yellow soda ash production process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101781090A CN102351219B (en) | 2011-06-29 | 2011-06-29 | Carbon dioxide removal method of combined alkali making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011101781090A CN102351219B (en) | 2011-06-29 | 2011-06-29 | Carbon dioxide removal method of combined alkali making method |
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| CN102351219A true CN102351219A (en) | 2012-02-15 |
| CN102351219B CN102351219B (en) | 2013-08-28 |
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| CN2011101781090A Expired - Fee Related CN102351219B (en) | 2011-06-29 | 2011-06-29 | Carbon dioxide removal method of combined alkali making method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964473A (en) * | 2014-02-25 | 2014-08-06 | 中盐安徽红四方股份有限公司 | Method for preparing alkali by utilizing acid gas in transformation stripping tower of ammonia synthesis device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716458A (en) * | 2010-01-14 | 2010-06-02 | 中电投远达环保工程有限公司 | System for trapping carbon dioxide in flue gas of coal-fired power plant and corresponding treatment method |
| CN101890283A (en) * | 2010-07-19 | 2010-11-24 | 刘海清 | Production process for removing carbon dioxide from smoke and preparing ammonium compound fertilizer and light calcium carbonate |
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2011
- 2011-06-29 CN CN2011101781090A patent/CN102351219B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716458A (en) * | 2010-01-14 | 2010-06-02 | 中电投远达环保工程有限公司 | System for trapping carbon dioxide in flue gas of coal-fired power plant and corresponding treatment method |
| CN101890283A (en) * | 2010-07-19 | 2010-11-24 | 刘海清 | Production process for removing carbon dioxide from smoke and preparing ammonium compound fertilizer and light calcium carbonate |
Non-Patent Citations (1)
| Title |
|---|
| 彭展英等: "联碱厂联产纳米碳酸钙的四联产绿色新工艺", 《无机盐工业》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964473A (en) * | 2014-02-25 | 2014-08-06 | 中盐安徽红四方股份有限公司 | Method for preparing alkali by utilizing acid gas in transformation stripping tower of ammonia synthesis device |
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| CN102351219B (en) | 2013-08-28 |
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Address after: The dance of Wuyang County of Luohe City, Henan province 462400 Spring Town Huadu Shuixie Building No. 23 Co-patentee after: Henan Jinshan Chemical Equipment Co., Ltd. Patentee after: Zhang Zhiguang Address before: The dance of Wuyang County of Luohe City, Henan province 462400 Spring Town Huadu Shuixie Building No. 23 Co-patentee before: Luohe Xinyu Chemical Industry Equipment Co., Ltd. Patentee before: Zhang Zhiguang |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20210629 |