CN102489109A - Dry-type efficient and energy saving system for cleaning flue gas of multi-pollutants - Google Patents
Dry-type efficient and energy saving system for cleaning flue gas of multi-pollutants Download PDFInfo
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- CN102489109A CN102489109A CN2011104085024A CN201110408502A CN102489109A CN 102489109 A CN102489109 A CN 102489109A CN 2011104085024 A CN2011104085024 A CN 2011104085024A CN 201110408502 A CN201110408502 A CN 201110408502A CN 102489109 A CN102489109 A CN 102489109A
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- flue gas
- deduster
- heat recovery
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a dry-type efficient and energy saving system for cleaning flue gas of multi-pollutants, comprising a pre-denitration device, an air preheater, a pre-deduster, an activated coke gas cleaning device, a waste heat recovery device, a deduster and a flue gas exhaust device which are sequentially communicated. A draught fan is arranged between the deduster and the waste heat recovery device or between the deduster and the flue gas exhaust device. The dry-type efficient and energy saving system for cleaning the flue gas of the multi-pollutants simultaneously has the characteristics of dedusting, desulfuration, denitration, mercury removal and waste heat recovery, and is particularly suitable for cleaning and waste heat recovery of the flue gas of the multi-pollutants generated by burning middle-low sulphur coal; and when all or part of the pre-deduster, the activated coke gas cleaning device, the waste heat recovery device and the deduster are formed in an integral device, structural components of the device are reduced, the cleaning process is shortened, and the system resistance is reduced, so that the whole system occupies a small area, and has small investment and low operation energy consumption.
Description
Technical field
The invention belongs to the flue gases purification field, be specifically related to the energy-efficient multi-pollutant flue gas purification system of a kind of dry type.
Background technology
Existing multi-pollutant flue gas purification system; Generally form by preparatory denitrification apparatus, air preheater, pre-duster, activated coke smoke eliminator, deduster, air-introduced machine and fume extractor; Wherein the activated coke smoke eliminator is the reactor that activated coke or active carbon are housed, and activated coke or active carbon be adsorbable to remove multiple pollutants such as sulphur in the flue gas, nitre, mercury.The former flue gas that purifies removes part NOx through preparatory denitrification apparatus; Air preheater reduces flue-gas temperature heating flame air; Pre-duster is removed in the flue gas behind the most dust; Remove multiple pollutant in the flue gas (sulphur, nitre, mercury, moisture content etc.) through the activated coke smoke eliminator, remove the fine dusts in the flue gas through deduster again, flue gas after being purified enters atmosphere through fume extractor under the effect of air-introduced machine.
The deficiency that existing multi-pollutant flue gas purification system exists is: fume afterheat is not recycled; Operation energy consumption is high; And do not carry out effective energy-saving between each device and consider and the optimization of gas cleaning flow arrangement that floor space is big, investment and operating cost are high.
Summary of the invention
In view of this; The invention provides the energy-efficient multi-pollutant flue gas purification system of a kind of dry type; Can be simultaneously with flue gas ash removal, desulfurization, denitration, demercuration, dehydration and waste heat recovery, the multi-pollutant gas cleaning and the waste heat recovery of low-sulfur coal in being specially adapted to use.
The energy-efficient multi-pollutant flue gas purification system of dry type of the present invention; Comprise the preparatory denitrification apparatus, air preheater, pre-duster, activated coke smoke eliminator, waste-heat recovery device, deduster and the fume extractor that are communicated with successively, be provided with air-introduced machine between said deduster and the waste-heat recovery device or between deduster and the fume extractor.
Further, said pre-duster, activated coke smoke eliminator, waste-heat recovery device and deduster are independent device and are communicated with successively through flue;
Further, in said pre-duster, activated coke smoke eliminator, waste-heat recovery device and the deduster adjacent two, three or four devices are communicated with as a whole and entire arrangement in flue;
Further, said preparatory denitrification apparatus is a kind of device or the combination of two or more devices in low nitrogen burning denitrification apparatus, SNCR denitrification apparatus and the SCR denitrification apparatus;
Further, said deduster is electrostatic precipitator or sack cleaner;
Further, said fume extractor is chimney or circulating water cooling tower.
Beneficial effect of the present invention is:
1) the present invention has the characteristic of dedusting, desulfurization, denitration, demercuration and waste heat recovery simultaneously; The multi-pollutant gas cleaning and the waste heat recovery of low-sulfur coal in being specially adapted to use; The high energy consumption of conventional flue gas dedusting, desulfurization, denitration, demercuration, high operating cost have been remedied; Particularly avoided the most frequently used limestone-gypsum wet desulphurization to be prone to the gypsum rain that produces; Reduced secondary pollution, the security and the stability of system's operation are improved greatly;
2) among the present invention; All or part of being integrally formed of pre-duster, activated coke smoke eliminator, waste-heat recovery device and deduster disguised when putting; Also reduced bulking block; Shortened purification process, reduced SR, made that the whole system floor space is little, investment is little, operation energy consumption is low.
Description of drawings
In order to make the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that the present invention is made further detailed description below, wherein:
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Below will carry out detailed description to the preferred embodiments of the present invention with reference to accompanying drawing.
Fig. 1 is a structural representation of the present invention; As shown in the figure; The energy-efficient multi-pollutant flue gas purification system of dry type of the present invention; Comprise the preparatory denitrification apparatus 1, air preheater 2, pre-duster 3, activated coke smoke eliminator 4, waste-heat recovery device 5, deduster 6 and the fume extractor 8 that are communicated with successively, be provided with air-introduced machine 7 between said deduster 6 and the fume extractor 8; Former flue gas G1 removes part NOx through preparatory denitrification apparatus 1 successively, and air preheater 2 reduces flue-gas temperature heating flame air, and pre-duster 3 is removed in the flue gas behind the most dust, removes multiple pollutant (SOx, H in the flue gas through activated coke smoke eliminator 4
2S, NOx, heavy metal Hg, steam etc.); Drop to flue-gas temperature more than the flue gas acid dew point temperature through waste-heat recovery device 5 again and consider that the uniform temperature surplus (utilizes waste heat recovery to other system of factory; Like heating boiler feedwater, heating cold wind, heat supply etc.); After deduster 6 removes the fine dusts in the flue gas, reach the clean flue gas G2 that satisfies behind the emission request and overcome SR by air-introduced machine 7 and enter atmosphere through fume extractor 8.Certainly, also can air-introduced machine 7 be arranged between deduster 6 and the waste-heat recovery device 5 according to deployment scenarios.
In the present embodiment; Denitrification apparatus 1 is accomplished denitrations jointly with activated coke smoke eliminator 4 in advance; Pre-duster 3 and deduster 6 common completion dedustings; Waste-heat recovery device 5 recovery waste heats, activated coke smoke eliminator 4 can also remove sulphur in the flue gas, mercury etc., so the present invention has the characteristic of dedusting, desulfurization, denitration, demercuration and waste heat recovery simultaneously; Former flue gas is through after the purified treatment of the present invention, the comprehensive removal efficiency of dust >=99.8%, SOx removal efficiency >=95%, NOx removal efficiency >=80%, heavy metal Hg removal efficiency >=80%, and waste heat recovery utilizes again, not consume water.
In the present embodiment, said pre-duster 3, activated coke smoke eliminator 4, waste-heat recovery device 5 and deduster 6 are independent device and are communicated with successively through flue 9.
In the present embodiment, said preparatory denitrification apparatus 1 is a kind of device or the combination of two or more devices in low nitrogen burning denitrification apparatus, SNCR denitrification apparatus and the SCR denitrification apparatus.
In the present embodiment, said deduster 6 is electrostatic precipitator or sack cleaner.
In the present embodiment, said fume extractor 8 is chimney or circulating water cooling tower.
As further improvement of the present invention, in said pre-duster 3, activated coke smoke eliminator 4, waste-heat recovery device 5 and the deduster 6 adjacent two, three or four devices are communicated with as a whole and entire arrangement in flue; Pre-duster 3, activated coke smoke eliminator 4, waste-heat recovery device 5 and deduster 6 all or part of is integrally formed makeup and puts; Can reduce bulking block; Shorten purification process, reduce SR, make that the whole system floor space is little, investment is little, operation energy consumption is low.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although through invention has been described with reference to the preferred embodiments of the present invention; But those of ordinary skill in the art should be appreciated that and can make various changes to it in form with on the details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (6)
1. energy-efficient multi-pollutant flue gas purification system of dry type; It is characterized in that: comprise the preparatory denitrification apparatus (1), air preheater (2), pre-duster (3), activated coke smoke eliminator (4), waste-heat recovery device (5), deduster (6) and the fume extractor (8) that are communicated with successively, be provided with air-introduced machine (7) between said deduster (6) and the waste-heat recovery device (5) or between deduster (6) and the fume extractor (8).
2. the energy-efficient multi-pollutant flue gas purification system of dry type according to claim 1 is characterized in that: said pre-duster (3), activated coke smoke eliminator (4), waste-heat recovery device (5) and deduster (6) are independent device and are communicated with successively through flue (9).
3. the energy-efficient multi-pollutant flue gas purification system of dry type according to claim 1 is characterized in that: in said pre-duster (3), activated coke smoke eliminator (4), waste-heat recovery device (5) and the deduster (6) adjacent two, three or four devices are communicated with as a whole and entire arrangement in flue.
4. according to claim 1, the energy-efficient multi-pollutant flue gas purification system of 2 or 3 described dry types, it is characterized in that: said preparatory denitrification apparatus (1) is a kind of device in low nitrogen burning denitrification apparatus, SNCR denitrification apparatus and the SCR denitrification apparatus or the combination of two or more devices.
5. according to claim 1, the energy-efficient multi-pollutant flue gas purification system of 2 or 3 described dry types, it is characterized in that: said deduster (6) is electrostatic precipitator or sack cleaner.
6. according to claim 1, the energy-efficient multi-pollutant flue gas purification system of 2 or 3 described dry types, it is characterized in that: said fume extractor (8) is chimney or circulating water cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104085024A CN102489109A (en) | 2011-12-09 | 2011-12-09 | Dry-type efficient and energy saving system for cleaning flue gas of multi-pollutants |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104085024A CN102489109A (en) | 2011-12-09 | 2011-12-09 | Dry-type efficient and energy saving system for cleaning flue gas of multi-pollutants |
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| CN102489109A true CN102489109A (en) | 2012-06-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921260A (en) * | 2012-11-09 | 2013-02-13 | 大连山元机械制造有限公司 | Device and method for removing mercury in waste gas |
| CN105749740A (en) * | 2016-04-27 | 2016-07-13 | 武汉凯比思电力设备有限公司 | Alkali recovery boiler low-temperature denitration system and process |
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| JP2001000833A (en) * | 1999-06-24 | 2001-01-09 | Kansai Electric Power Co Inc:The | Boiler flue gas treating device |
| CN2813072Y (en) * | 2005-08-16 | 2006-09-06 | 孙克勤 | Combined flue gas denitrating dust cleaning and desulfurizing apparatus |
| CN101918108A (en) * | 2008-01-21 | 2010-12-15 | 三菱重工业株式会社 | System for treating discharge gas from coal-fired boiler and method of operating the same |
| CN101940868A (en) * | 2009-07-06 | 2011-01-12 | 王向明 | Industrial flue gas treatment method and system thereof |
| CN201832557U (en) * | 2010-11-05 | 2011-05-18 | 浙江菲达脱硫工程有限公司 | Dry flue gas desulfurizing, denitrating and dust removing integral device |
| CN202315634U (en) * | 2011-12-09 | 2012-07-11 | 中电投远达环保工程有限公司 | Dry-type high-efficiency and energy-saving purification system for multi-pollutant smoke |
-
2011
- 2011-12-09 CN CN2011104085024A patent/CN102489109A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001000833A (en) * | 1999-06-24 | 2001-01-09 | Kansai Electric Power Co Inc:The | Boiler flue gas treating device |
| CN2813072Y (en) * | 2005-08-16 | 2006-09-06 | 孙克勤 | Combined flue gas denitrating dust cleaning and desulfurizing apparatus |
| CN101918108A (en) * | 2008-01-21 | 2010-12-15 | 三菱重工业株式会社 | System for treating discharge gas from coal-fired boiler and method of operating the same |
| CN101940868A (en) * | 2009-07-06 | 2011-01-12 | 王向明 | Industrial flue gas treatment method and system thereof |
| CN201832557U (en) * | 2010-11-05 | 2011-05-18 | 浙江菲达脱硫工程有限公司 | Dry flue gas desulfurizing, denitrating and dust removing integral device |
| CN202315634U (en) * | 2011-12-09 | 2012-07-11 | 中电投远达环保工程有限公司 | Dry-type high-efficiency and energy-saving purification system for multi-pollutant smoke |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921260A (en) * | 2012-11-09 | 2013-02-13 | 大连山元机械制造有限公司 | Device and method for removing mercury in waste gas |
| CN105749740A (en) * | 2016-04-27 | 2016-07-13 | 武汉凯比思电力设备有限公司 | Alkali recovery boiler low-temperature denitration system and process |
| CN105749740B (en) * | 2016-04-27 | 2018-06-19 | 武汉凯比思电力设备有限公司 | Alkali recovery boiler low-temperature denitrifying system and technique |
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Application publication date: 20120613 |