CN201719926U - Flue gas dedusting system in pulverized coal fired boiler - Google Patents
Flue gas dedusting system in pulverized coal fired boiler Download PDFInfo
- Publication number
- CN201719926U CN201719926U CN2010202501026U CN201020250102U CN201719926U CN 201719926 U CN201719926 U CN 201719926U CN 2010202501026 U CN2010202501026 U CN 2010202501026U CN 201020250102 U CN201020250102 U CN 201020250102U CN 201719926 U CN201719926 U CN 201719926U
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- Prior art keywords
- flue
- flue gas
- coal fired
- fired boiler
- outlet
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000003546 flue gas Substances 0.000 title claims abstract description 24
- 239000003245 coal Substances 0.000 title claims abstract description 11
- 239000000428 dust Substances 0.000 claims abstract description 26
- 239000000779 smoke Substances 0.000 claims description 12
- 238000005453 pelletization Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 abstract description 9
- 239000010883 coal ash Substances 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000011044 inertial separation Methods 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model relates to a flue gas dedusting system in a pulverized coal fired boiler, which has the advantages of simple structure and convenient use, and can significantly slow the failure rate of the catalyst, improve the denitrification efficiency and reduce the denitrification cost. The flue gas dedusting system is arranged in a flue behind a boiler economizer and in front of a denitrification device, and comprises a group of diversion plates arranged in horizontal sections of corners of the flue and a group of rectification plates respectively arranged in vertical sections of the flue; a flue at a flue gas inlet and a flue at a flue gas outlet are respectively connected with a cold dust hopper; and a flying dust collector is respectively arranged at the outlet of the horizontal flue and at the outlet of the vertical flue.
Description
Technical field
The utility model relates to a kind of pulverized-coal fired boiler inner flue gas of the stove dust pelletizing system.
Background technology
Large-sized boiler all need be installed selectivity catalytic denitration device (SCR) at afterbody (being the boiler air preheater exit position) at present, reaches standard-required to guarantee the amount of nitrogen oxides in the discharging flue gas.The main operating cost of SCR device is the consumption of catalyst, and catalyst mostly relies on import at present, and price is very high, and this is the high main cause of SCR mode denitration cost.
Because denitrification apparatus is in behind the boiler air preheater and the zone before the boiler dust remover, this zone does not have special fume dust remover, contain a large amount of coal ash through in the flue gas of denitrification apparatus, these coal ash can pollute denitrating catalyst, reduce the denitration catalyst effect of catalyst greatly, reduce its service life.Therefore, reduce the coal ash content in the flue gas, help prolonging the service life of catalyst, improve the denitration efficiency of denitrification apparatus, reduce cost of electricity-generating.
Summary of the invention
The purpose of this utility model is exactly in order to address the above problem, and provides a kind of and has simple in structurely, easy to use, and the inefficacy speed that can obviously slow down catalyst improves denitration efficiency, reduces the pulverized-coal fired boiler inner flue gas of the stove dust pelletizing system of denitration cost.
For achieving the above object, the utility model adopts following technical scheme:
A kind of pulverized-coal fired boiler inner flue gas of the stove dust pelletizing system, it be installed in behind the boiler economizer and denitrification apparatus before flue in, it comprises one group of deflector in the horizontal segment that is arranged on each turning of flue, is respectively equipped with one group of cowling panel at each vertical section of flue in then; The flue at smoke inlet place is connected with a furnace hopper respectively with the flue of smoke outlet; Be respectively equipped with the flying dust gathering-device in horizontal flue outlet and vertical gas pass exit.
Be provided with boiler economizer or air preheater in the flue at described smoke inlet place.
The vertical gas pass end of described smoke outlet is provided with the SCR device.
Described each flying dust gathering-device place respectively is provided with a flapper.
The utility model has one group of deflector at the horizontal segment inlet at flue turning, and flue gas is carried out rectification, makes the coal ash in the flue gas concentrated relatively; There is one group of flying dust gathering-device at the turning of horizontal segment outlet, and gathering-device comprises inlet, grey storehouse and ash conveying pipe, and the outlet of ash conveying pipe links to each other with adjacent boiler furnace hopper; Be furnished with flapper on the ash conveying pipe simultaneously, be furnished with cowling panel in the vertical gas pass after horizontal flue is turned, air-flow is carried out rectification, air-flow is evenly distributed in flue.
The beneficial effects of the utility model are: the part dust in the flue gas can be removed by this system, substantially do not increase simultaneously the resistance of boiler air and gas system, mainly according to the flow feature of flue gas stream and original characteristics of flue structure, by the inertial separation principle, designed the flying dust that the flying dust gathering-device is used for collecting flue gas, reduce the flying dust concentration in the flue gas, different according to the structure of deflector and resistance, flying dust amount in the flue gas can reduce 25～40%, so just can obviously slow down the inefficacy speed of catalyst, improve denitration efficiency, reduce the denitration cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Wherein, 1 boiler economizer or air preheater; 2 deflectors; The 3SCR device; 4 cowling panels; 5 furnace hoppers; 6 flappers; 7 flying dust gathering-devices.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Among Fig. 1, a kind of pulverized-coal fired boiler inner flue gas of the stove dust pelletizing system, it be installed in behind the boiler economizer and denitrification apparatus before flue in, it comprises one group of deflector 2 in the horizontal segment that is arranged on each turning of flue, is respectively equipped with one group of cowling panel 4 at each vertical section of flue in then; The flue at smoke inlet place is connected with a furnace hopper 5 respectively with the flue of smoke outlet; Be respectively equipped with flying dust gathering-device 7 in horizontal flue outlet and vertical gas pass exit.
Be provided with boiler economizer or air preheater 1 in the flue at described smoke inlet place.
The vertical gas pass end of described smoke outlet is provided with SCR device 3.
Described each flying dust gathering-device 7 place respectively are provided with a flapper 6.
Claims (4)
1. pulverized-coal fired boiler inner flue gas of the stove dust pelletizing system, in the flue that it is installed in behind the boiler economizer and denitrification apparatus is preceding, it is characterized in that it comprises one group of deflector in the horizontal segment that is arranged on each turning of flue, be respectively equipped with one group of cowling panel in then at each vertical section of flue; The flue at smoke inlet place is connected with a furnace hopper respectively with the flue of smoke outlet; Be respectively equipped with the flying dust gathering-device in horizontal flue outlet and vertical gas pass exit.
2. pulverized-coal fired boiler inner flue gas of the stove dust pelletizing system as claimed in claim 1 is characterized in that, is provided with boiler economizer or air preheater in the flue at described smoke inlet place.
3. pulverized-coal fired boiler inner flue gas of the stove dust pelletizing system as claimed in claim 1 is characterized in that the vertical gas pass end of described smoke outlet is provided with the SCR device.
4. pulverized-coal fired boiler inner flue gas of the stove dust pelletizing system as claimed in claim 1 is characterized in that, described each flying dust gathering-device place respectively is provided with a flapper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202501026U CN201719926U (en) | 2010-07-07 | 2010-07-07 | Flue gas dedusting system in pulverized coal fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202501026U CN201719926U (en) | 2010-07-07 | 2010-07-07 | Flue gas dedusting system in pulverized coal fired boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201719926U true CN201719926U (en) | 2011-01-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202501026U Expired - Fee Related CN201719926U (en) | 2010-07-07 | 2010-07-07 | Flue gas dedusting system in pulverized coal fired boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201719926U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628590A (en) * | 2012-03-20 | 2012-08-08 | 广东电网公司电力科学研究院 | Biomass circulating fluidized bed direct combustion apparatus |
| CN102688629A (en) * | 2012-06-04 | 2012-09-26 | 东方电气集团东方锅炉股份有限公司 | SCR (selective catalytic reduction) denitration dedusting device |
| CN104492168A (en) * | 2014-12-24 | 2015-04-08 | 国电龙源节能技术有限公司 | Flue gas dust removal device |
| CN105833643A (en) * | 2016-04-28 | 2016-08-10 | 中国计量大学 | System for collecting popcorn-like dust in exhaust gas of coal-fired boiler |
| CN106400655A (en) * | 2016-11-23 | 2017-02-15 | 徐工集团工程机械有限公司 | Centrifugal dust removal device, dust removal system and mixing plant |
| CN107427773A (en) * | 2015-04-08 | 2017-12-01 | 三菱日立电力系统株式会社 | Emission-control equipment |
| CN108889118A (en) * | 2018-09-21 | 2018-11-27 | 南京兰丰环保科技有限公司 | A kind of SCR equipment for denitrifying flue gas |
| CN110088554A (en) * | 2016-12-28 | 2019-08-02 | 三菱重工业株式会社 | Heat exchanger and ship |
| CN113457446A (en) * | 2021-07-28 | 2021-10-01 | 苏州西热节能环保技术有限公司 | Cement kiln SCR denitration reaction system |
-
2010
- 2010-07-07 CN CN2010202501026U patent/CN201719926U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628590B (en) * | 2012-03-20 | 2014-09-17 | 广东电网公司电力科学研究院 | Biomass circulating fluidized bed direct combustion apparatus |
| CN102628590A (en) * | 2012-03-20 | 2012-08-08 | 广东电网公司电力科学研究院 | Biomass circulating fluidized bed direct combustion apparatus |
| CN102688629A (en) * | 2012-06-04 | 2012-09-26 | 东方电气集团东方锅炉股份有限公司 | SCR (selective catalytic reduction) denitration dedusting device |
| CN102688629B (en) * | 2012-06-04 | 2014-09-03 | 东方电气集团东方锅炉股份有限公司 | SCR (selective catalytic reduction) denitration dedusting device |
| CN104492168A (en) * | 2014-12-24 | 2015-04-08 | 国电龙源节能技术有限公司 | Flue gas dust removal device |
| CN105344164A (en) * | 2014-12-24 | 2016-02-24 | 国电龙源节能技术有限公司 | Flue gas dedusting device able to reduce flue gas channel blockage by ash |
| CN105477937A (en) * | 2014-12-24 | 2016-04-13 | 国电龙源节能技术有限公司 | Flue-gas dedusting apparatus capable of preventing denitration catalyst from being positioned and inactivated |
| CN105344164B (en) * | 2014-12-24 | 2018-02-09 | 国电龙源节能技术有限公司 | A kind of fume dust remover for reducing ash content and blocking exhaust gases passes |
| CN107427773A (en) * | 2015-04-08 | 2017-12-01 | 三菱日立电力系统株式会社 | Emission-control equipment |
| CN105833643B (en) * | 2016-04-28 | 2018-03-06 | 中国计量大学 | A kind of puffed rice ash collection system in coal-fired boiler tail gas |
| CN105833643A (en) * | 2016-04-28 | 2016-08-10 | 中国计量大学 | System for collecting popcorn-like dust in exhaust gas of coal-fired boiler |
| CN106400655A (en) * | 2016-11-23 | 2017-02-15 | 徐工集团工程机械有限公司 | Centrifugal dust removal device, dust removal system and mixing plant |
| CN106400655B (en) * | 2016-11-23 | 2019-02-26 | 徐工集团工程机械有限公司 | Centrifugal dust collection device, dust pelletizing system and mixing plant |
| CN110088554A (en) * | 2016-12-28 | 2019-08-02 | 三菱重工业株式会社 | Heat exchanger and ship |
| CN108889118A (en) * | 2018-09-21 | 2018-11-27 | 南京兰丰环保科技有限公司 | A kind of SCR equipment for denitrifying flue gas |
| CN113457446A (en) * | 2021-07-28 | 2021-10-01 | 苏州西热节能环保技术有限公司 | Cement kiln SCR denitration reaction system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20140707 |
|
| EXPY | Termination of patent right or utility model |