CN1994528A - Method for applying causticized white sludge in removal of sulfur dioxide from fume - Google Patents
Method for applying causticized white sludge in removal of sulfur dioxide from fume Download PDFInfo
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- CN1994528A CN1994528A CN 200610077637 CN200610077637A CN1994528A CN 1994528 A CN1994528 A CN 1994528A CN 200610077637 CN200610077637 CN 200610077637 CN 200610077637 A CN200610077637 A CN 200610077637A CN 1994528 A CN1994528 A CN 1994528A
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- flue gas
- slag
- causticization
- clay
- causticization clay
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Abstract
The invention relates to a method for using causticizing clay slag to remove sulfur dioxide of smoke, wherein the invention is characterized in that: (1), using desulfurizing device to contact the clay slurry and smoke, to remove the sulfur dioxide and generate calcium sulfate slurry; (2), removing the water of calcium sulfate slurry to obtain the calcium sulfate. The invention has high efficiency and utilizes waste causticizing clay slag, to reduce ethe cost.
Description
Technical field
The invention belongs to environmental protection and technical field of resource utilization, relate to the method that a kind of causticization clay-slag is used to remove sulfur in smoke.
Background technology
The causticization clay-slag is as the present processing method of a kind of discarded object:
1. the small part enterprise that makes pure wood pulp makes lime after with the calcining of causticization clay-slag and turns back to caustic room again and reuse.Small part paper plant is used for the brickmaking of brickmaking factory with the causticization clay-slag.
2. alumina producing factory with the causticization clay-slag with deliver to special stockyard after red mud mixes and store up.
3. most business processes causticization clay-slags take to transport outward the mode of concentrating landfill.
As time goes on the continuous expansion of production capacity, the secondary pollution of consequent causticization clay-slag will be given prominence to day by day, also waste a large amount of resources simultaneously.And in the flue gas desulfurization field: limestone-gypsum method, two alkaline process, magnesium oxide method etc. are extensively adopted in wet desulphurization both at home and abroad, need resources such as a large amount of calcium carbonate, calcium oxide, magnesia, liquid caustic soda.Remove one ton of sulfur dioxide resources costs and be approximately 200 ~ 400 yuan.
The causticization clay-slag is as the alternative above-mentioned medicament of a kind of desulfurizing agent, and it not only has higher desulfuration efficiency, and can effectively utilize discarded causticization clay-slag, thereby has saved the reagent cost that flue gas desulfurization purifies.In addition, can also obtain the accessory substance gypsum after the desulfurization.
Summary of the invention
Purpose of the present invention just is to provide a kind of causticization clay-slag to be used to remove the method for sulfur in smoke.This method not only has higher desulfuration efficiency, and can effectively utilize discarded causticization clay-slag, thereby has saved the reagent cost that flue gas desulfurization purifies.In addition, can also obtain the accessory substance gypsum after the desulfurization.
Technical scheme of the present invention is achieved in that a kind of causticization clay-slag is used to remove the method for sulfur in smoke, is characterized in that:
(1) make causticization white clay slurries constantly contact through desulphurization plant, to remove sulfur dioxide in flue gas and to generate gypsum slurries with flue gas;
(2) gypsum slurries makes gypsum through dehydration.
Above-mentioned causticization clay-slag is that sodium carbonate is converted into the calcium carbonate that is settled out in the causticization process of NaOH.
The remarkable advantage that causticization clay-slag of the present invention is used for removing the method for sulfur in smoke is effectively to have utilized the discarded object causticization clay-slag of industrial production, not only solved depositing and pollution problem of these discarded objects, and saved the reagent cost that flue gas desulfurization purifies, and can be the user and obtain the accessory substance gypsum.
Description of drawings
Fig. 1 is the spray woods void tower desulfurization schematic diagram of the embodiment of the invention one
Fig. 2 is the liquid column tower desulfurization schematic diagram of the embodiment of the invention two
Fig. 3 is the JBR tower desulfurization schematic diagram of the embodiment of the invention three
The specific embodiment
The embodiment of the invention one is characterised in that: described desulphurization plant comprises the spray void tower and is arranged at the recycle slurry liquid pool (5) of spray void tower bottom, be provided with causticization clay-slag input pipe (12), slurries efferent duct (15), agitator (9) and air oxidation aerator (10) in the recycle slurry liquid pool (5), described slurries efferent duct top, be provided with the spray head (7) that penetrates spray void tower top inner chamber and be positioned at gas approach (14) upside, described air oxidation aerator (10) is by being located at outer Roots blower (1) air feed of tower.
The chemical equation of sweetening process of the present invention is:
1.SO
2+ H
2O → H
2SO
3Absorb
2.CaCO
3+ H
2SO
3→ CaSO
3+ CO
2+ H
2The O neutralization
3.CaSO
3+ 1/2O
2→ CaSO
4Oxidation
4.CaSO
3+1/2H
2O→CaSO
31/2H
2O
6.CaSO
3+ H
2SO
3→ Ca (HSO
3)
2PH control
Its sweetening process is: flue gas enters in the desulfurizing tower (11), contact with the desulfurization slurry that sprays, flue gas after the desulfurization is discharged by exhanst gas outlet (13) behind demister (8), be acid with the doctor solution after the flue gas haptoreaction, enter into the recycle slurry liquid pool (5) that the desulfurizing tower bottom is provided with, the causticization clay-slag is by in the recycle slurry liquid pool of causticization clay wash liquid pump (3) adding desulfurizing tower bottom (5), in recycle slurry liquid pool (5), the dissolving of causticization clay-slag, reaction, generate calcium sulphate dihydrate, calcium sulphate dihydrate is extracted out by calcium plaster liquid pump (4), through dehydration, filtration obtains gypsum.
The embodiment of the invention two is characterised in that: described desulphurization plant also can comprise liquid column tower and be arranged at the recycle slurry liquid pool (5) of liquid column tower bottom, in liquid column tower inside, be provided with the spray head and the demister (8) that are positioned at gas approach (14) upside, be provided with causticization clay-slag input pipe (12) in the recycle slurry liquid pool (5), slurries efferent duct (13), agitator (9) and air oxidation aerator (10), described slurries efferent duct (15) top is connected in the spray head that is positioned at gas approach (14) upside, and described air oxidation aerator (10) is by being located at outer Roots blower (1) air feed of tower.
Its sweetening process is: flue gas enters in the desulfurizing tower (11), spraying layer sprays from bottom to top, gravity falls again, twice of doctor solution contacts with flue gas in the process of upwards spraying and falling, flue gas after the desulfurization is discharged by exhanst gas outlet (13) behind demister (8), be acid with the doctor solution after the flue gas haptoreaction, enter into the recycle slurry liquid pool (5) that the desulfurizing tower bottom is provided with, the causticization clay-slag is by in the recycle slurry liquid pool of causticization clay wash liquid pump (3) adding desulfurizing tower bottom (5), in the recycle slurry liquid pool, the dissolving of causticization clay-slag, reaction generates calcium sulphate dihydrate, calcium sulphate dihydrate is extracted out by calcium plaster liquid pump (4), through dehydration, filtration obtains gypsum.
The embodiment of the invention three is characterised in that: described desulphurization plant also can comprise the JBR tower and be arranged at the recycle slurry liquid pool (5) of liquid column tower bottom, be provided with causticization clay-slag input pipe (12), agitator (9) and air oxidation aerator (10) in the recycle slurry liquid pool, playpipe (6) and demister (8) are installed in JBR tower inside, and described air oxidation aerator (10) is by being located at outer Roots blower (1) air feed of tower.
Its sweetening process is: flue gas enters in the desulfurizing tower (11), contact with doctor solution through playpipe (6), flue gas after the desulfurization is discharged by exhanst gas outlet (13) behind tedge (7), demister (8), the causticization clay-slag is by in the recycle slurry liquid pool of causticization clay wash liquid pump (3) adding desulfurizing tower bottom (5), in recycle slurry liquid pool (5), the dissolving of causticization clay-slag, reaction generate calcium sulphate dihydrate, calcium sulphate dihydrate is extracted out by calcium plaster liquid pump (4), obtains gypsum through dehydration, filtration.
Claims (7)
1. a causticization clay-slag is used to remove the method for sulfur in smoke, it is characterized in that:
(1) make causticization white clay slurries constantly contact through desulphurization plant, to remove sulfur dioxide in flue gas and to generate gypsum slurries with flue gas;
(2) gypsum slurries makes gypsum through dehydration.
2. causticization clay-slag according to claim 1 is used to remove the method for sulfur dioxide in flue gas, it is characterized in that: described causticization clay-slag is that sodium salt is converted into the calcium carbonate that is settled out in the causticization process of NaOH.
3. causticization clay-slag according to claim 1 and 2 is used to remove the method for sulfur dioxide in flue gas, it is characterized in that: described desulphurization plant comprises the spray void tower and is arranged at the recycle slurry liquid pool (5) of spray void tower bottom, be provided with causticization clay-slag input pipe (12) in the recycle slurry liquid pool (5), slurries efferent duct (15), agitator (9) and air oxidation aerator (10), described slurries efferent duct top, be provided with the spray head (7) that penetrates spray void tower top inner chamber and be positioned at gas approach (14) upside, described air oxidation aerator (10) is by being located at outer Roots blower (1) air feed of tower.
4. causticization clay-slag according to claim 3 is used to remove the method for sulfur dioxide in flue gas, it is characterized in that: its sweetening process is: flue gas enters in the desulfurizing tower (11), contact with the desulfurization slurry that sprays, flue gas after the desulfurization is discharged by exhanst gas outlet (13) behind demister (8), be acid with the doctor solution after the flue gas haptoreaction, enter into the recycle slurry liquid pool (5) that the desulfurizing tower bottom is provided with, the causticization clay-slag is by in the recycle slurry liquid pool of causticization clay wash liquid pump (3) adding desulfurizing tower bottom (5), in recycle slurry liquid pool (5), the dissolving of causticization clay-slag, reaction, generate calcium sulphate dihydrate, calcium sulphate dihydrate is extracted out by calcium plaster liquid pump (4), through dehydration, filtration obtains gypsum.
5. causticization clay-slag according to claim 1 and 2 is used to remove the method for sulfur dioxide in flue gas, it is characterized in that: described desulphurization plant also can comprise liquid column tower and be arranged at the recycle slurry liquid pool (5) of liquid column tower bottom, in liquid column tower inside, be provided with the spray head and the demister (8) that are positioned at gas approach (14) upside, be provided with causticization clay-slag input pipe (12) in the recycle slurry liquid pool (5), slurries efferent duct (13), agitator (9) and air oxidation aerator (10), described slurries efferent duct (15) top is connected in the spray head that is positioned at gas approach (14) upside, and described air oxidation aerator (10) is by being located at outer Roots blower (1) air feed of tower.
6. causticization clay-slag according to claim 5 is used to remove the method for sulfur dioxide in flue gas, it is characterized in that: flue gas enters in the desulfurizing tower (11), spraying layer sprays from bottom to top, gravity falls again, twice of doctor solution contacts with flue gas in the process of upwards spraying and falling, flue gas after the desulfurization is discharged by exhanst gas outlet (13) behind demister (8), be acid with the doctor solution after the flue gas haptoreaction, enter into the recycle slurry liquid pool (5) that the desulfurizing tower bottom is provided with, the causticization clay-slag is by in the recycle slurry liquid pool of causticization clay wash liquid pump (3) adding desulfurizing tower bottom (5), in the recycle slurry liquid pool, the dissolving of causticization clay-slag, reaction, generate calcium sulphate dihydrate, calcium sulphate dihydrate is extracted out by calcium plaster liquid pump (4), through dehydration, filtration obtains gypsum.
7. causticization clay-slag according to claim 1 and 2 is used to remove the method for sulfur dioxide in flue gas, it is characterized in that: described desulphurization plant also can comprise the JBR tower and be arranged at the recycle slurry liquid pool (5) of liquid column tower bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610077637 CN1994528A (en) | 2006-04-18 | 2006-04-18 | Method for applying causticized white sludge in removal of sulfur dioxide from fume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610077637 CN1994528A (en) | 2006-04-18 | 2006-04-18 | Method for applying causticized white sludge in removal of sulfur dioxide from fume |
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| CN1994528A true CN1994528A (en) | 2007-07-11 |
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| CN 200610077637 Pending CN1994528A (en) | 2006-04-18 | 2006-04-18 | Method for applying causticized white sludge in removal of sulfur dioxide from fume |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955370A (en) * | 2010-04-20 | 2011-01-26 | 无锡南理工科技发展有限公司 | Lightweight heat insulating ceramic material and preparation method |
| CN102423608A (en) * | 2011-10-28 | 2012-04-25 | 长沙理工大学 | Desulfurizer prepared by causticized white mud and method thereof for flue gas desulphurization |
| CN102557101A (en) * | 2010-12-09 | 2012-07-11 | 吉林化纤集团有限责任公司 | Method for producing building gypsum powder by utilizing papermaking residual liquid |
| CN106268272A (en) * | 2016-08-08 | 2017-01-04 | 湖北双环科技股份有限公司 | Boiler smoke alkaline residue wet desulphurization device |
| CN106925088A (en) * | 2015-12-29 | 2017-07-07 | 天津市英派克石化工程有限公司 | A kind of modified technique with white clay desulfurizing agent |
| CN111468510A (en) * | 2020-04-20 | 2020-07-31 | 华电电力科学研究院有限公司 | Device and method for treating alkaline hazardous waste by using clean flue gas of coal-fired power plant |
| CN114108352A (en) * | 2021-11-25 | 2022-03-01 | 华北电力大学（保定） | Papermaking white mud pretreatment system and method for wet desulphurization |
-
2006
- 2006-04-18 CN CN 200610077637 patent/CN1994528A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955370A (en) * | 2010-04-20 | 2011-01-26 | 无锡南理工科技发展有限公司 | Lightweight heat insulating ceramic material and preparation method |
| CN101955370B (en) * | 2010-04-20 | 2012-09-12 | 南京理工大学 | Lightweight heat insulating ceramic material and preparation method |
| CN102557101A (en) * | 2010-12-09 | 2012-07-11 | 吉林化纤集团有限责任公司 | Method for producing building gypsum powder by utilizing papermaking residual liquid |
| CN102423608A (en) * | 2011-10-28 | 2012-04-25 | 长沙理工大学 | Desulfurizer prepared by causticized white mud and method thereof for flue gas desulphurization |
| CN106925088A (en) * | 2015-12-29 | 2017-07-07 | 天津市英派克石化工程有限公司 | A kind of modified technique with white clay desulfurizing agent |
| CN106268272A (en) * | 2016-08-08 | 2017-01-04 | 湖北双环科技股份有限公司 | Boiler smoke alkaline residue wet desulphurization device |
| CN111468510A (en) * | 2020-04-20 | 2020-07-31 | 华电电力科学研究院有限公司 | Device and method for treating alkaline hazardous waste by using clean flue gas of coal-fired power plant |
| CN114108352A (en) * | 2021-11-25 | 2022-03-01 | 华北电力大学（保定） | Papermaking white mud pretreatment system and method for wet desulphurization |
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Open date: 20070711 |