CN100577263C - Method for Integrated control and recycle of flue gas pollutant of fire coal electric power plant, and special system thereof - Google Patents
Method for Integrated control and recycle of flue gas pollutant of fire coal electric power plant, and special system thereof Download PDFInfo
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- CN100577263C CN100577263C CN200610047520A CN200610047520A CN100577263C CN 100577263 C CN100577263 C CN 100577263C CN 200610047520 A CN200610047520 A CN 200610047520A CN 200610047520 A CN200610047520 A CN 200610047520A CN 100577263 C CN100577263 C CN 100577263C
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Abstract
The invention discloses a method for the integrated control and the resource of smoke gas pollution in the fire coal power station, which is characterized by the following: absorbing the pollution material (SO2, CO2, Hg,Pm2. 5) of coal burning by spraying amino solution as the ammonium salt form in the integrated absorption system after the tail of coal-burning boiler is removed dust; reducing the discharge of 100% SO2, 20%-95% carbon dioxide, 10%-80% Hg and 10%-70% Pm2. 5 in the smoke gas; acquiring high purity carbon dioxide by separating carbon dioxide absorbed as the ammonium salt form for industry, chemical industry, food processing industry and the oil displacement of oil extraction, wherein the dust concentration discharged by the defroster in the clean smoke gas is less than 40mg/Nm3, the escape ratio of amine discharged by the defroster in the clean smoke gas is less than 15mg/Nm3. The invention has the apparent advantages from the production ability aspect and the technology process, the economic and environment benefit, and the production device varieties and quantity aspect, which has the wide application prospect.
Description
Technical field:
The present invention relates to integrated control of a kind of coal fired power plant flue gas pollutant and resource technology thereof, this technology is the technology that is applied to the integrated control procedure of coal-fired station's exhaust pollutant, is suitable for having now, the integrated control of pollutant of newly-built large, medium and small unit and resource technology transformation thereof, construction project.
Background technology:
China is to be the country of the energy resource structure of main energy sources with the coal, and will continue to increase along with the growth of national economy, using in a large number of coal produces a large amount of pollutants such as sulfur dioxide, nitrogen oxide, carbon dioxide, mercury and other heavy metal, have a strong impact on the sustainable development of Chinese national economy, and make the Chinese government face very big international environmental protection pressure.For realizing the sustainable development of Chinese national economy, improve environmental aspect of China and the people's living environment, reduce the discharging of pollution that caused by coal burning thing and become extremely urgent task.China is aspect coal fired power plant flue gas desulfurization, denitration, and existing monotechnics and engineering are used, and the research that integrated control technology and engineering are used still is in the starting stage, now only only limits to the research of mechanism aspect.China's coal fired power plant does not still adopt the flue gas pollutant integrated control unit at present, does not grasp the design of large-scale flue gas pollutant integrated control unit, the technology of manufacturing yet.
Flue gas pollutant is integrated to be controlled on the coal fired power generation unit of western developed country and to be in experiment and demonstration conceptual phase equally.
Summary of the invention:
The objective of the invention is to propose a kind of integrated control efficiency height of pollutant that has, do not produce secondary pollution, and broad application temperature range, the Carbon Dioxide Application of recovery is extensive, and applicability is stronger, the integrated control technology of the flue gas pollutant that range of application is wider.
The technology that the present invention relates to is the method for the integrated control of a kind of flue gas pollutant, and the basic principle of this technology is based on synthetic ammonia and ammonium hydrogencarbonate production technology.Particularly, the invention provides the method for integrated control of a kind of coal fired power plant flue gas pollutant and resource thereof, containing concentration in the flue gas that described coal-fired power station boiler burning generates is 1～18% carbon dioxide, 100～5000ppmSO
2, 3～30 μ g/Nm
3Hg and Pm2.5 is characterized in that:
---the flue gas that the coal-fired power station boiler burning is generated carries out pre-dust removal process, removes the grit more than 99% in the flue dust;
---amino substance solution is sprayed in the flue gas after the above-mentioned pre-dedusting, absorb the pollutant SO that produces in the absorption coal combustion with the form of ammonium salt
2, CO
2, Hg, Pm2.5 reduces discharging 100%SO in the flue gas
2, 20～95% carbon dioxide, 10～80% Hg, 10～70% Pm2.5, reaction temperature is at 10～70 ℃, the addition of ammonia be with flue gas in the mol ratio 0.3～3.0 of carbon dioxide;
---with the ammonium salt behind the above-mentioned absorption absorption pollutant, isolation of purified goes out highly purified carbon dioxide gas under high temperature pressure, and temperature range is 30～200 ℃, and pressure limit is 5～100atm;
---carry out the demist processing with above-mentioned through absorbing adsorption treatment flue gas later, in the clean flue gas of discharging, dust concentration≤40mg/Nm
3, the escapement ratio of ammonia is≤15mg/Nm
3
In the method for integrated control of coal fired power plant flue gas pollutant of the present invention and resource thereof, it is 3～28% ammoniacal liquor or urea liquid that described amino material is preferably selected concentration for use.
In the method for integrated control of coal fired power plant flue gas pollutant of the present invention and resource thereof, described highly purified carbon dioxide gas does not contain impurity such as heavy metal, dust, can be further used for chemical industry, food processing or the oil industry displacement of reservoir oil.
In the method for integrated control of coal fired power plant flue gas pollutant of the present invention and resource thereof, described pre-dedusting can be electrostatic precipitation or bag-type dust.
The present invention also provides a kind of system that is specifically designed to integrated control of above-mentioned coal fired power plant flue gas pollutant and method of resource thereof, it is characterized in that: this system is by boiler (1), pre-dedusting device (2), absorption king-tower (3), absorption secondary tower (4), cleaning tower (5), and demister (6), multi-functional separator (7), amino material EGR I (8), II (9), III (10), clear water storage device (11), carbon dioxide recovering apparatus (12), Integrated Processing Unit (13), former amino material storage device (14) constitute; Boiler (1), pre-dedusting device (2) absorbs king-tower (3), absorbs secondary tower (4), cleans tower (5), and demister (6) is linked in sequence; Former amino material storage device (14) links to each other with amino material EGR I (8); Clear water storage device (11) cleans tower (5), and amino material EGR I (8) is linked in sequence; Amino material EGR I (8), amino material EGR II (9) absorbs king-tower (3), and amino material EGR III (10) absorbs secondary tower (4), the connection that circulates of multi-functional separator (7), amino material EGR I (8); Multi-functional separator (7) is connected with carbon dioxide recovering apparatus (12), Integrated Processing Unit (13) respectively.
In integrated control of coal fired power plant flue gas pollutant of the present invention and the resource system thereof, described absorption king-tower (3) absorbs secondary tower (4), cleans tower (5), is material filling type liquid gas two-phase absorption tower.
In integrated control of coal fired power plant flue gas pollutant of the present invention and the resource system thereof, described multi-functional separator (7) is a pressure elevated temperature heat separator, be selected from thermal release reactor and gas fractionation reactor, operating temperature range is 30～200 ℃, and pressure limit is 5～80atm.
In integrated control of coal fired power plant flue gas pollutant of the present invention and the resource system thereof, described carbon dioxide recovering apparatus (12) is a carbon dioxide circulation compression set.
In integrated control of coal fired power plant flue gas pollutant of the present invention and the resource system thereof, described absorption king-tower (3), absorption secondary tower (4), cleaning tower (5), demister (6), multi-functional separator (7), amino material EGR I (8), II (9), III (10), clear water storage device (11), carbon dioxide recovering apparatus (12), Integrated Processing Unit (13), former amino material storage device (14) are the anti-acid and alkali corrosion device of high strength.
The present invention has following advantage:
(1) the integrated control efficiency height of pollutant;
(2) adaptive temperature wide ranges;
(3) absorbent is in strict accordance with waiting quantitative response mol ratio to add, and there is not the excessive problem of amino material in reaction absorption completeness height;
(4) continue circulation absorption absorption pollutant through separating the ammonia that reclaims; Be used for industry, chemical industry, food processing, the oil industry displacement of reservoir oil etc. through separating the carbon dioxide that reclaims;
(5) reducing agent is in strict accordance with waiting quantitative response mol ratio to add, and the degree that reacts completely height reclaims that liquid reclaims through separating, integrated treatment, the non-secondary pollution deposits yields.
In a word, system of the present invention is simple, operational stability good, absorbent adaptability is strong, the integrated control efficiency height of pollutant, can reach more than 90%.Initial cost and operating cost are low, and floor space is enumerated less than the control of flue gas unit pollutant.No matter from the production capacity aspect, still from technological process, the kind of production equipment and quantitative aspects all have tangible technical advantage, therefore have more application prospects.
Description of drawings:
Fig. 1 connects signal for present device; (1) boiler among the figure, (2) pre-dedusting device, (3) absorb king-tower, and (4) absorb secondary tower, (5) clean tower, (6) demister, (7) multi-functional separator, (8) amino material EGR I, (9) amino material EGR II, (10) amino material EGR III, (11) clear water storage device, (12) carbon dioxide recovering apparatus, (13) Integrated Processing Unit, (14) former amino material storage device.
The specific embodiment:
The basic process of the method for integrated control of coal fired power plant flue gas pollutant and resource thereof is as follows:
1) containing concentration in the flue gas that the coal-fired power station boiler burning generates is 1～18% carbon dioxide, 100～5000ppmSO
2, 3～30 μ g/Nm
3Hg and Pm2.5;
2) flue gas through pre-dedusting enters comprehensive absorption system, comprises two major and minor absorption towers that absorb pollutant;
3) amino substance solution evenly sprays the pollutant that absorbs in the absorption flue gas in major and minor absorption tower;
4) be absorbed the flue gas of pollutant through cleaning except that being discharged in the atmosphere after ammonia, the demist;
5) absorption liquid that has absorbed carbon dioxide separates in multi-functional separator (7), and carbon dioxide is recovered resource, and ammonia is recovered and recycles.
Adopt the equipment shown in the accompanying drawing 1 to connect, idiographic flow is described below: amino material enters multi-functional separator (7) and enters amino material EGR III (10) through separating back ammonia after spraying the pollutant that enters in major-minor absorption tower (3), (4) absorption process flue gas of pre-dedusting by amino material EGR I (8), II (9), III (10); The clear water unreacted ammonia of washing, dust etc. in cleaning tower enter amino material EGR III (10); Concentrated ammonia liquor adds to amino material EGR III (10) by former amino material storage device (14) and continues circulation.Be recycled to carbon dioxide recovering apparatus (12) through separating carbon dioxide in multi-functional separator (7), the waste liquid that is discharged from carries out harmless treatment at Integrated Processing Unit (13); The flue gas process absorbs king-tower (3), absorption secondary tower (4) pollutant is absorbed absorption, does not absorb the ammonia that adsorbs pollutant through cleaning tower (5) and is absorbed by clear water, passes through being discharged in the atmosphere after the clean flue gas in demister (6) back enters chimney again.
Certain coal-fired power station boiler discharging flue gas 17 ten thousand stere/hour, 1～18% carbon dioxide contained in the flue gas, 100～5000ppmSO
2, 3～30 μ g/Nm
3Hg and Pm2.5.The ammonia spirit of use 15% is made absorbent in comprehensive absorption plant, and ammonia and carbon dioxide mol ratio are 1.6.Idiographic flow is:
Ammonia spirit sprays the major-minor absorption tower (3), (4) that enter comprehensive absorption system by amino material EGR I (8), II (9), III (10) and absorbs through behind the pollutant in the flue gas of pre-dedusting, enters multi-functional separator (7) and enters amino material EGR III (10) through separating back ammonia; Clear water washing in cleaning tower enters amino material EGR III (10) for the ammonia of reaction, dust etc.; Concentrated ammonia liquor adds to amino material EGR III (10) by former amino material storage device (14) and continues circulation.Be recycled to carbon dioxide recovering apparatus (12) through separating carbon dioxide in multi-functional separator (7), the waste liquid that is discharged from carries out harmless treatment at Integrated Processing Unit (13); The flue gas process absorbs king-tower (3), absorption secondary tower (4) pollutant is absorbed absorption, does not absorb the ammonia that adsorbs pollutant through cleaning tower (5) and is absorbed by clear water, passes through being discharged in the atmosphere after the clean flue gas in demister (6) back enters chimney again.The design pollution reduction efficient of this system is: 95%SO
2, 80% carbon dioxide, 50% Hg, 50% Pm2.5, kind of dust≤40mg/Nm
3, the escapement ratio of ammonia is≤15mg/Nm
3
Certain coal-fired power station boiler discharging flue gas 48.5 ten thousand stere/hour, 1～18% carbon dioxide contained in the flue gas, 100～5000ppmSO
2, 3～30 μ g/Nm
3Hg and Pm2.5.The urea liquid of use 15% is made absorbent in three tower absorption plants, and urea and carbon dioxide mol ratio are 1.0.Idiographic flow is:
Urea liquid sprays the major-minor absorption tower (3), (4) that enter comprehensive absorption system by amino material EGR I (8), II (9), III (10) and absorbs through behind the pollutant in the flue gas of pre-dedusting, enters multi-functional separator (7) and enters amino material EGR III (10) through separating back ammonia; Clear water washing in cleaning tower enters amino material EGR III (10) for the ammonia of reaction, dust etc.; Concentrated ammonia liquor adds to amino material EGR III (10) by former amino material storage device (14) and continues circulation.Be recycled to carbon dioxide recovering apparatus (12) through separating carbon dioxide in multi-functional separator (7), the waste liquid that is discharged from carries out harmless treatment at Integrated Processing Unit (13); The flue gas process absorbs king-tower (3), absorption secondary tower (4) pollutant is absorbed absorption, does not absorb the ammonia that adsorbs pollutant through cleaning tower (5) and is absorbed by clear water, passes through being discharged in the atmosphere after the clean flue gas in demister (6) back enters chimney again.The design pollution reduction efficient of this system is: 95%SO
2, 90% carbon dioxide, 60% Hg, 60% Pm2.5, kind of dust≤40mg/Nm
3, the escapement ratio of ammonia is≤15mg/Nm
3
Embodiment 3
Certain coal-fired power station boiler discharging flue gas 30.5 ten thousand stere/hour, carbon dioxide content 14% in the flue gas, and the ammonia spirit of use 15% is made absorbent in three tower absorption plants, and ammonia and carbon dioxide mol ratio are 1.5.Idiographic flow is:
Ammonia spirit sprays the major-minor absorption tower (3), (4) that enter the carbon dioxide absorption system by amino material EGR I (8), II (9), III (10) and absorbs through behind the carbon dioxide in the flue gas of pre-dedusting, enters multi-functional separator (7) and enters amino material EGR III (10) through separating back ammonia; Clear water washing in cleaning tower enters amino material EGR III (10) for the ammonia of reaction, dust etc.; Concentrated ammonia liquor adds to amino material EGR III (10) by former amino material storage device (14) and continues circulation.Be recycled to carbon dioxide recovering apparatus (12) through separating carbon dioxide in multi-functional separator (7), the waste liquid that is discharged from carries out harmless treatment at Integrated Processing Unit (13); Flue gas is absorbed through absorption king-tower (3), absorption secondary tower (4) carbon dioxide, and process cleaning tower (5) the not ammonia of absorbing carbon dioxide is absorbed by clear water, passes through being discharged in the atmosphere after the clean flue gas in demister (6) back enters chimney again.The design pollution reduction efficient of this system is: 95%SO
2, 75% carbon dioxide, 60% Hg, 60% Pm2.5, kind of dust≤40mg/Nm
3, the escapement ratio of ammonia is≤15mg/Nm
3
Certain coal-fired power station boiler discharging flue gas 30 ten thousand stere/hour, carbon dioxide content 14% in the flue gas, and the urea liquid of use 10% is made absorbent in three tower absorption plants, and urea and carbon dioxide mol ratio are 0.75.Idiographic flow is:
Urea liquid sprays the major-minor absorption tower (3), (4) that enter the carbon dioxide absorption system by amino material EGR I (8), II (9), III (10) and absorbs through behind the carbon dioxide in the flue gas of pre-dedusting, enters multi-functional separator (7) and enters amino material EGR III (10) through separating back ammonia; Clear water washing in cleaning tower enters amino material EGR III (10) for the ammonia of reaction, dust etc.; Concentrated ammonia liquor adds to amino material EGR III (10) by former amino material storage device (14) and continues circulation.Be recycled to carbon dioxide recovering apparatus (12) through separating carbon dioxide in multi-functional separator (7), the waste liquid that is discharged from carries out harmless treatment at Integrated Processing Unit (13); Flue gas is absorbed through absorption king-tower (3), absorption secondary tower (4) carbon dioxide, and process cleaning tower (5) the not ammonia of absorbing carbon dioxide is absorbed by clear water, passes through being discharged in the atmosphere after the clean flue gas in demister (6) back enters chimney again.The design pollution reduction efficient of this system is: 95%SO
2, 75%% carbon dioxide, 60% Hg, 60% Pm2.5, kind of dust≤40mg/Nm
3, the escapement ratio of ammonia is≤15mg/Nm
3
Claims (8)
1, the method for integrated control of a kind of coal fired power plant flue gas pollutant and resource thereof, containing concentration in the flue gas that described coal-fired power station boiler burning generates is 1～18% carbon dioxide, 100～5000ppmSO
2, 3～30 μ g/Nm
3Hg and Pm2.5 is characterized in that:
---the flue gas that the coal-fired power station boiler burning is generated carries out pre-dust removal process, removes the grit more than 99% in the flue dust;
---amino substance solution is sprayed in the flue gas after the above-mentioned pre-dedusting, absorb the pollutant SO that produces in the absorption coal combustion with the form of ammonium salt
2, CO
2, Hg, Pm2.5 reduces discharging 100%SO in the flue gas
2, 20～95% carbon dioxide, 10～80% Hg, 10～70% Pm2.5, reaction temperature is at 10～70 ℃, the addition of ammonia be with flue gas in the mol ratio 0.3～3.0 of carbon dioxide;
---with the ammonium salt behind the above-mentioned absorption absorption pollutant, isolation of purified goes out highly purified carbon dioxide gas under high temperature pressure, and temperature range is 30～200 ℃, and pressure limit is 5～100atm;
---carry out the demist processing with above-mentioned through absorbing adsorption treatment flue gas later, in the clean flue gas of discharging, dust concentration≤40mg/Nm
3, the escapement ratio of ammonia is≤15mg/Nm
3
2, according to the method for claim 1 integrated control of described coal fired power plant flue gas pollutant and resource thereof, it is characterized in that: described amino material is that concentration is 3～28% ammoniacal liquor or urea liquid.
3, according to the method for claim 1 integrated control of described coal fired power plant flue gas pollutant and resource thereof, it is characterized in that: described highly purified carbon dioxide gas is further used for chemical industry, food processing or the oil industry displacement of reservoir oil.
4, according to the method for claim 1 integrated control of described coal fired power plant flue gas pollutant and resource thereof, it is characterized in that: described pre-dedusting is electrostatic precipitation or bag-type dust.
5, a kind of integrated control of coal fired power plant flue gas pollutant and resource system thereof that is specifically designed to the described method of one of claim 1～4, it is characterized in that: this system is by boiler (1), pre-dedusting device (2), absorption king-tower (3), absorption secondary tower (4), cleaning tower (5), and demister (6), multi-functional separator (7), amino material EGR I (8), II (9), III (10), clear water storage device (11), carbon dioxide recovering apparatus (12), Integrated Processing Unit (13), former amino material storage device (14) constitute; Boiler (1), pre-dedusting device (2) absorbs king-tower (3), absorbs secondary tower (4), cleans tower (5), and demister (6) is linked in sequence; Former amino material storage device (14) links to each other with amino material EGR I (8); Clear water storage device (11) cleans tower (5), and amino material EGR I (8) is linked in sequence; Amino material EGR I (8), amino material EGR II (9) absorbs king-tower (3), and amino material EGR III (10) absorbs secondary tower (4), the connection that circulates of multi-functional separator (7), amino material EGR I (8); Multi-functional separator (7) is connected with carbon dioxide recovering apparatus (12), Integrated Processing Unit (13) respectively;
Multi-functional separator (7) is a pressure elevated temperature heat separator, is selected from thermal release reactor and gas fractionation reactor, and operating temperature range is 30～200 ℃, and pressure limit is 5～80atm.
6, according to claim 5 integrated control of described coal fired power plant flue gas pollutant and resource system thereof, it is characterized in that: described absorption king-tower (3), absorb secondary tower (4), clean tower (5), be material filling type liquid gas two-phase absorption tower.
7, according to claim 5 integrated control of described coal fired power plant flue gas pollutant and resource system thereof, it is characterized in that: described carbon dioxide recovering apparatus (12) is a carbon dioxide circulation compression set.
8, according to claim 5 integrated control of described coal fired power plant flue gas pollutant and resource system thereof, it is characterized in that: described absorption king-tower (3), absorption secondary tower (4), cleaning tower (5), demister (6), multi-functional separator (7), amino material EGR I (8), II (9), III (10), clear water storage device (11), carbon dioxide recovering apparatus (12), Integrated Processing Unit (13), former amino material storage device (14) are the anti-acid and alkali corrosion device of high strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610047520A CN100577263C (en) | 2006-08-23 | 2006-08-23 | Method for Integrated control and recycle of flue gas pollutant of fire coal electric power plant, and special system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610047520A CN100577263C (en) | 2006-08-23 | 2006-08-23 | Method for Integrated control and recycle of flue gas pollutant of fire coal electric power plant, and special system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101130150A CN101130150A (en) | 2008-02-27 |
| CN100577263C true CN100577263C (en) | 2010-01-06 |
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| CN200610047520A Expired - Fee Related CN100577263C (en) | 2006-08-23 | 2006-08-23 | Method for Integrated control and recycle of flue gas pollutant of fire coal electric power plant, and special system thereof |
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| Country | Link |
|---|---|
| CN (1) | CN100577263C (en) |
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| CN101130150A (en) | 2008-02-27 |
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