CN103990341A - Denitration and dedusting system for boiler flue gas - Google Patents
Denitration and dedusting system for boiler flue gas Download PDFInfo
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- CN103990341A CN103990341A CN201410170044.9A CN201410170044A CN103990341A CN 103990341 A CN103990341 A CN 103990341A CN 201410170044 A CN201410170044 A CN 201410170044A CN 103990341 A CN103990341 A CN 103990341A
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- denitration
- air preheater
- bag
- economizer
- dedusting system
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Abstract
The invention discloses a denitration and dedusting system for boiler flue gas. The denitration and dedusting system comprises a denitration reactor, a coal economizer, an air preheater and an electrostatic-bag composite precipitator and is characterized in that the denitration reactor is mounted between the coal economizer and the air preheater, the electrostatic precipitation part of the electrostatic-bag composite precipitator is arranged behind the outlet of the coal economizer and before the inlet of the denitration reactor, and the bag precipitation part of the electrostatic-bag composite precipitator is arranged behind the outlet of the air preheater. According to the invention, through reasonable arrangement of a conventional denitration and dedusting system, the purposes of improvement of denitration efficiency and prolongation of the service life of a catalyst are achieved without increase of investment.
Description
Technical field
The present invention relates to the denitration dust collecting system of the treatment technology of boiler smoke, particularly a kind of boiler smoke.
Technical background
At present, in air contaminant treatment, denitration mainly adopts selective catalytic reduction (Selective Catalytic Reduction, SCR), generally under catalyst (as V2O5/TiO2 and V2O5-WO3/TiO2) effect, reducing agent NH3 is reduced into N2 by NO and NO2 at 290-400 DEG C, and there is hardly the oxidation reaction of NH3, thus improve the selective of N2, reduce the consumption of NH3.Catalyst structure often adopts honeycomb fashion.For ensureing the efficiency of denitration, conventional denitration now, dust pelletizing system is: Benitration reactor is generally arranged between economizer and air preheater, here temperature can remain between efficient 290-400 DEG C of occurring of denitration chemical reaction, based on the temperature tolerance of sack cleaner cloth bag, economy, the sack cleaner operating temperature of most boiler is generally below 200 DEG C, and medium-and-large-sized boiler is the service life that extends bag-type dust cloth bag, conventionally adopt again electric cloth complex dust collector, after the consideration of electricity cloth complex dust collector based on temperature is generally arranged on air preheater.The problem causing is like this, boiler flue gas out enters in SCR Benitration reactor without dust removal process, in flue gas, dust granules is easy to stop up cellular catalyst, causes denitration efficiency to reduce, also reduce because the wearing and tearing of bulky grain flying dust to catalyst etc. cause catalyst life simultaneously.And the cost of catalyst accounts for the major part of denitration device, catalyst stops up, lost efficacy, changes, it is one of prime cost of denitration operation, therefore, reduce catalyst and stop up probability, reduce the wearing and tearing of catalyst, there is great economic benefit and social benefit service life thereby improve denitration efficiency, extending catalyst.
Summary of the invention
The object of the present invention is to provide a kind of catalyst that reduces to stop up probability, reduce the wearing and tearing of catalyst, thereby improve denitration efficiency, the extending catalyst denitration dust collecting system in service life.
The technical solution used in the present invention is: a kind of denitration dust collecting system of boiler smoke, comprise Benitration reactor, economizer, air preheater and electric cloth complex dust collector, it is characterized in that: described Benitration reactor is arranged between economizer and air preheater, after the electric precipitation part of electricity cloth complex dust collector is arranged on economizer exit and before denitration reactor inlet, after the bag-type dust part of electric cloth complex dust collector is arranged in air preheater outlet.
The present invention is arranged on Benitration reactor between economizer and air preheater, like this temperature of denitration chemical reaction is remained on to 290-400 DEG C, has ensured efficiently carrying out of denitration chemical reaction; Simultaneously by the electric precipitation part of electric cloth complex dust collector, from former common be arranged in Benitration reactor and air preheater after, change into be arranged in after economizer exit and denitration reactor inlet before, the bag-type dust part of electric cloth complex dust collector, after being arranged on air preheater outlet.This is because electric cleaner can tolerate 300-400 degree high temperature, before the electric precipitation part of electric cloth complex dust collector is arranged on to denitration reactor inlet, first be about to the short grained dust of larger particles and part and remove, significantly reduce the possibility that denitrating catalyst stops up, significantly reduced the wearing and tearing of bulky grain flying dust to catalyst.After the bag-type dust part of electricity cloth complex dust collector is still arranged on air preheater outlet, ensure efficiency of dust collection, because be provided with sack cleaner below, so electric cleaner arranges one to two electric field, bag-type dust part is also because there being electric cleaner part above, the initial stage of dust removal part builds and drops into by a relatively large margin, and electric cleaner has been removed cloth bag being washed away to large large dust granules in advance, equally largely the upper service life that extends cloth bag.
The present invention, by existing denitration dust collecting system is rationally set, does not increase investment and can realize raising denitration efficiency, the goal of the invention in extending catalyst service life.
Detailed description of the invention
According to detailed description of the invention, the present invention is further described below:
The denitration dust collecting system of boiler smoke of the present invention, comprise Benitration reactor, economizer, air preheater and electric cloth complex dust collector, Benitration reactor is arranged between economizer and air preheater, after the electric precipitation part of electricity cloth complex dust collector is arranged on economizer exit and before denitration reactor inlet, after the bag-type dust part of electric cloth complex dust collector is arranged on air preheater outlet.
More than show and described general principle of the present invention and principal character and advantage of the present invention; the technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (1)
1. the denitration dust collecting system of a boiler smoke, comprise Benitration reactor, economizer, air preheater and electric cloth complex dust collector, it is characterized in that: described Benitration reactor is arranged between economizer and air preheater, after the electric precipitation part of electricity cloth complex dust collector is arranged on economizer exit and before denitration reactor inlet, after the bag-type dust part of electric cloth complex dust collector is arranged on air preheater outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410170044.9A CN103990341A (en) | 2014-04-25 | 2014-04-25 | Denitration and dedusting system for boiler flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410170044.9A CN103990341A (en) | 2014-04-25 | 2014-04-25 | Denitration and dedusting system for boiler flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103990341A true CN103990341A (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410170044.9A Pending CN103990341A (en) | 2014-04-25 | 2014-04-25 | Denitration and dedusting system for boiler flue gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN103990341A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679594A (en) * | 2018-04-17 | 2018-10-19 | 华电电力科学研究院有限公司 | Station boiler is adjustable high temperature dust pelletizing system and application process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10118448A (en) * | 1996-10-18 | 1998-05-12 | Sumitomo Heavy Ind Ltd | Method and apparatus for desulfurization, denitration and dust collection from flue gas |
| CN102266722A (en) * | 2011-07-01 | 2011-12-07 | 中电投远达环保工程有限公司 | SCR (Selective Catalyctic Reduction) denitrating process and device for smoke with high dust content |
| CN102309918A (en) * | 2011-03-14 | 2012-01-11 | 无锡华光锅炉股份有限公司 | Dedusting and denitration system for thermal power plant fire coal smoke |
| KR101107384B1 (en) * | 2007-11-02 | 2012-01-19 | 에스케이에너지 주식회사 | Process and apparatus for refining synthetic gas from waste using plasma pyrolysis |
| EP2481471A1 (en) * | 2011-02-01 | 2012-08-01 | Alstom Technology Ltd | Apparatus and system for NOx reduction in wet flue gas |
| CN102921297A (en) * | 2012-11-21 | 2013-02-13 | 江苏中建材环保研究院有限公司 | SCR denitrification device for dedusting smoke of cement kiln at high temperature |
-
2014
- 2014-04-25 CN CN201410170044.9A patent/CN103990341A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10118448A (en) * | 1996-10-18 | 1998-05-12 | Sumitomo Heavy Ind Ltd | Method and apparatus for desulfurization, denitration and dust collection from flue gas |
| KR101107384B1 (en) * | 2007-11-02 | 2012-01-19 | 에스케이에너지 주식회사 | Process and apparatus for refining synthetic gas from waste using plasma pyrolysis |
| EP2481471A1 (en) * | 2011-02-01 | 2012-08-01 | Alstom Technology Ltd | Apparatus and system for NOx reduction in wet flue gas |
| CN102309918A (en) * | 2011-03-14 | 2012-01-11 | 无锡华光锅炉股份有限公司 | Dedusting and denitration system for thermal power plant fire coal smoke |
| CN102266722A (en) * | 2011-07-01 | 2011-12-07 | 中电投远达环保工程有限公司 | SCR (Selective Catalyctic Reduction) denitrating process and device for smoke with high dust content |
| CN102921297A (en) * | 2012-11-21 | 2013-02-13 | 江苏中建材环保研究院有限公司 | SCR denitrification device for dedusting smoke of cement kiln at high temperature |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679594A (en) * | 2018-04-17 | 2018-10-19 | 华电电力科学研究院有限公司 | Station boiler is adjustable high temperature dust pelletizing system and application process |
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Application publication date: 20140820 |