CN204629541U - The dust arrester of a kind of coal-burning power plant SCR denitration system inlet flue gas - Google Patents
The dust arrester of a kind of coal-burning power plant SCR denitration system inlet flue gas Download PDFInfo
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- CN204629541U CN204629541U CN201520309131.8U CN201520309131U CN204629541U CN 204629541 U CN204629541 U CN 204629541U CN 201520309131 U CN201520309131 U CN 201520309131U CN 204629541 U CN204629541 U CN 204629541U
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- flue gas
- flue
- cyclone separator
- scr denitration
- feed inlet
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- 239000003546 flue gas Substances 0.000 title claims abstract description 65
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000000428 dust Substances 0.000 title claims abstract description 28
- 108700018263 Brassica oleracea SCR Proteins 0.000 title abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 43
- 230000008676 import Effects 0.000 claims abstract description 9
- 206010022000 influenza Diseases 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
Abstract
The utility model provides the dust arrester of a kind of coal-burning power plant SCR denitration system inlet flue gas.Described dust arrester comprises boiler back end ductwork and boiler economizer, many high temperature bypass flues are provided with on front side of boiler economizer, rear side is provided with many low-temperature flue gas pipelines, it is characterized in that: be provided with a double feed inlet Cyclone Separator with Downward Exhaust Gas at every root high temperature bypass flue and low-temperature flue gas pipeline junction, one of them import of double feed inlet Cyclone Separator with Downward Exhaust Gas is communicated with high temperature bypass flue, another import and low-temperature flue gas pipeline communication, the exhanst gas outlet of double feed inlet Cyclone Separator with Downward Exhaust Gas is communicated with the mouth that enters of SCR denitration system; Storehouse pump is provided with in the bottom of each double feed inlet Cyclone Separator with Downward Exhaust Gas.The utility model solves the problem that in flue gas, thin ash cannot effectively be separated, and farthest reduces the ash quantity in flue gas, and is fully mixed by high and low temperature flue gas, obtain the flue gas be evenly distributed.
Description
Technical field
The utility model relates to a kind of fume dust remover, particularly relates to the dust arrester of a kind of coal-burning power plant SCR denitration system inlet flue gas.
Background technology
The SCR denitration system of coal-burning power plant utilizes ammonia or ammoniacal liquor, under the effect of catalyst, the conversion of nitrogen oxides that fired coal combustion generates is become nitrogen.Catalyst layer is the core of denitration reaction, and its activity directly decides the reaction efficiency of SCR denitration system.But SCR system is usually placed in the working region of high temperature, high dirt, the activity of catalyst is subject to the impact of flue-gas temperature and dust concentration very greatly, and wherein when unit is during start and stop and peak regulation, flue-gas temperature affects generation larger fluctuation by underload; During boiler uses ash-rich coal, dust concentration can obviously become large.If catalyst longtime running wherein, consequently cause catalysqt deactivation.
At present, the flue-gas temperature of SCR entrance can be improved both at home and abroad by design boiler economizer gas bypass, solve because economizer exit flue-gas temperature reduces the problem affecting catalyst activity, have good inhibitory action to the generation of high viscosity hydrogen sulfate ammonia simultaneously.But, for the solution that the problem of SCR entrance height dust concentration is never desirable, common way utilizes boiler economizer ash bucket to remove oarse-grained fallout in flue gas on the one hand, adopts the method for steam soot blowing or sonic soot blowing to clean on the other hand to catalyst layer.
Operating experience shows, and flying dust is the key factor causing catalyst abrasion and blocking.The gravity when economizer hopper of economizer hopper or expansion-type utilizes flue gas to turn to and inertia force isolate the bulky grain flying dust in flue gas, but most thin ash cannot effectively be separated in flying dust, in addition cannot profit dedusting in this way by the flue gas of economizer bypass; Catalyst layer blow ash just cleaning pollute after catalyst to ensure its reactivity, what but fundamentally can not control that flying dust causes catalyst washes away and weares and teares.Therefore need the dust collection method considering a kind of SCR denitration system inlet flue gas farthest to reduce the ash quantity in flue gas.
Summary of the invention
The utility model is according to the deficiencies in the prior art, the dust arrester of a kind of coal-burning power plant SCR denitration system inlet flue gas is provided, this dust arrester is the advantage in conjunction with warm cyclone separator in exhaust under recirculating fluidized bed, a set of double feed inlet Cyclone Separator with Downward Exhaust Gas is designed between boiler economizer outlet and SCR denitration system entrance, flue gas after economizer is mixed with economizer bypass flue gas, and rotating separation goes out flying dust.
The technical scheme that the utility model provides: the dust arrester of described a kind of coal-burning power plant SCR denitration system inlet flue gas, comprise boiler back end ductwork and be arranged on the boiler economizer in flue, boiler back end ductwork on front side of boiler economizer is provided with many high temperature bypass flues, boiler back end ductwork on rear side of boiler economizer is provided with the low-temperature flue gas pipeline identical with high temperature bypass flue radical, every root high temperature bypass flue is communicated with the mouth that enters of SCR denitration system after being connected with a wherein low-temperature flue gas pipeline, it is characterized in that: be provided with a double feed inlet Cyclone Separator with Downward Exhaust Gas at every root high temperature bypass flue with corresponding low-temperature flue gas pipeline junction, one of them import of double feed inlet Cyclone Separator with Downward Exhaust Gas is communicated with high temperature bypass flue, another import and low-temperature flue gas pipeline communication, the exhanst gas outlet of double feed inlet Cyclone Separator with Downward Exhaust Gas is communicated with the mouth that enters of SCR denitration system, storehouse pump is provided with in the bottom of each double feed inlet Cyclone Separator with Downward Exhaust Gas.
The utility model is technical scheme preferably: on every root high temperature bypass flue, be provided with gas proportioning damper.
The utility model is technical scheme preferably: the many low-temperature flue gas pipelines be arranged on rear side of boiler economizer are all communicated with economizer hopper.
The utility model is technical scheme preferably: described high temperature bypass flue and low-temperature flue gas pipeline are equipped with 4-6 root, and double feed inlet Cyclone Separator with Downward Exhaust Gas is also provided with 4-6.
Operation principle of the present utility model is: the low-temperature flue gas after economizer enters double feed inlet Cyclone Separator with Downward Exhaust Gas one side-inlet after economizer hopper, and economizer bypass high-temperature flue gas enters double feed inlet Cyclone Separator with Downward Exhaust Gas opposite side side-inlet.Two strands of flue gases are abundant disturbances mixing in Whirlwind barrel, and the flying dust in flue gas is separated by Whirlwind barrel and falls into storehouse, bottom pump, by pneumatic ash removal system defeated walk.Double feed inlet Cyclone Separator with Downward Exhaust Gas exhaust outlet connects SCR denitration system entrance, regulates the baffle plate on economizer gas bypass can obtain the flue-gas temperature of SCR entrance needs.
The utility model designs a set of double feed inlet Cyclone Separator with Downward Exhaust Gas between boiler economizer outlet and SCR denitration system entrance, solve the problem that in flue gas, thin ash cannot effectively be separated, especially solve the problem that economizer bypass flue gas flying dust cannot be separated, farthest reduce the ash quantity in flue gas.In addition, high and low temperature flue gas fully mixes by separator, obtains the flue gas be evenly distributed, and utilizes the gas proportioning damper in economizer bypass flue simultaneously, and obtaining can the flue gas of temperature adjustment.The utility model has sizable using value to the problem such as wearing and tearing, blocking, inactivation alleviating SCR denitration system inner catalyst.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is floor map of the present utility model.
In figure: 1-boiler economizer, 2-economizer hopper, 3-high temperature bypass flue, 3-1-gas proportioning damper, 4-boiler back end ductwork, 5-double feed inlet Cyclone Separator with Downward Exhaust Gas, 6-storehouse pump, 7-SCR denitration system, 8-low-temperature flue gas pipeline, 9-SCR denitration system spray ammonia grid, 10-SCR denitration system catalyst layer, 11-air preheater.
Detailed description of the invention
Below in conjunction with schematic diagram, the utility model is described in further detail.As depicted in figs. 1 and 2, the dust arrester of described a kind of coal-burning power plant SCR denitration system inlet flue gas, the boiler economizer 1 comprising boiler back end ductwork 4 and be arranged in flue, boiler back end ductwork 4 on front side of boiler economizer 1 is provided with many high temperature bypass flues 3, high temperature bypass flue 3 is generally provided with 4-6 root, boiler back end ductwork 4 on rear side of boiler economizer 1 is provided with the low-temperature flue gas pipeline 8 identical with high temperature bypass flue 3 radical, the many low-temperature flue gas pipelines 8 be arranged on rear side of boiler economizer 1 are all communicated with economizer hopper 2; Every root high temperature bypass flue 3 is communicated with the mouth that enters of SCR denitration system 7 after being connected with a wherein low-temperature flue gas pipeline 8, and every root high temperature bypass flue 3 is provided with gas proportioning damper 3-1.It is characterized in that: be provided with a double feed inlet Cyclone Separator with Downward Exhaust Gas 5 at every root high temperature bypass flue 3 with corresponding low-temperature flue gas pipeline 8 junction, double feed inlet Cyclone Separator with Downward Exhaust Gas 5 is existing cyclone separator, be provided with two imports, and be vented from below, one of them import of double feed inlet Cyclone Separator with Downward Exhaust Gas 5 is communicated with high temperature bypass flue 3, another import is communicated with low-temperature flue gas pipeline 8, and the exhanst gas outlet of double feed inlet Cyclone Separator with Downward Exhaust Gas 5 is communicated with the mouth that enters of SCR denitration system 7; Storehouse pump 6 is provided with in the bottom of each double feed inlet Cyclone Separator with Downward Exhaust Gas 5.
The course of work of the present utility model is: a part of high-temperature flue gas on front side of boiler economizer 1 in flue enters in double feed inlet Cyclone Separator with Downward Exhaust Gas 5 by high temperature bypass flue 3, low-temperature flue gas on rear side of boiler economizer 1 is separated flying dust through economizer hopper 2, enter in double feed inlet Cyclone Separator with Downward Exhaust Gas 5 by low-temperature flue gas pipeline 8 afterwards, high-temperature flue gas and the mixing full and uniform in double feed inlet Cyclone Separator with Downward Exhaust Gas 5 of low-temperature flue gas, the flying dust separated all falls into storehouse pump 6, via pneumatic ash removal system defeated walk, isolated flying dust and the flue gas mixed out enters SCR denitration system 7 afterwards from double feed inlet Cyclone Separator with Downward Exhaust Gas 5, through spray ammonia grid 9, air preheater 11 is entered after catalyst layer 10.In above-mentioned smoke evacuation process, the gas proportioning damper 3-1 of every root high temperature bypass flue 3 inside can be utilized to regulate exhaust gas volumn can control the delivery temperature of double feed inlet Cyclone Separator with Downward Exhaust Gas 5.
Claims (4)
1. the dust arrester of coal-burning power plant's SCR denitration system inlet flue gas, comprise boiler back end ductwork (4) and be arranged on the boiler economizer (1) in flue, the boiler back end ductwork (4) of boiler economizer (1) front side is provided with many high temperature bypass flues (3), the boiler back end ductwork (4) of boiler economizer (1) rear side is provided with the low-temperature flue gas pipeline (8) identical with high temperature bypass flue (3) radical, every root high temperature bypass flue (3) is communicated with the mouth that enters of SCR denitration system (7) after being connected with a wherein low-temperature flue gas pipeline (8), it is characterized in that: be provided with a double feed inlet Cyclone Separator with Downward Exhaust Gas (5) every root high temperature bypass flue (3) with corresponding low-temperature flue gas pipeline (8) junction, one of them import of double feed inlet Cyclone Separator with Downward Exhaust Gas (5) is communicated with high temperature bypass flue (3), another import is communicated with low-temperature flue gas pipeline (8), the exhanst gas outlet of double feed inlet Cyclone Separator with Downward Exhaust Gas (5) is communicated with the mouth that enters of SCR denitration system (7), storehouse pump (6) is provided with in the bottom of each double feed inlet Cyclone Separator with Downward Exhaust Gas (5).
2. the dust arrester of a kind of coal-burning power plant according to claim 1 SCR denitration system inlet flue gas, is characterized in that: on every root high temperature bypass flue (3), be provided with gas proportioning damper (3-1).
3. the dust arrester of a kind of coal-burning power plant according to claim 1 SCR denitration system inlet flue gas, is characterized in that: the many low-temperature flue gas pipelines (6) being arranged on boiler economizer (1) rear side are all communicated with economizer hopper (2).
4. the dust arrester of a kind of coal-burning power plant according to claim 1 SCR denitration system inlet flue gas, it is characterized in that: described high temperature bypass flue (3) and low-temperature flue gas pipeline (8) are equipped with 4-6 root, double feed inlet Cyclone Separator with Downward Exhaust Gas (5) is also provided with 4-6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520309131.8U CN204629541U (en) | 2015-05-14 | 2015-05-14 | The dust arrester of a kind of coal-burning power plant SCR denitration system inlet flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520309131.8U CN204629541U (en) | 2015-05-14 | 2015-05-14 | The dust arrester of a kind of coal-burning power plant SCR denitration system inlet flue gas |
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| CN204629541U true CN204629541U (en) | 2015-09-09 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716100A (en) * | 2016-03-31 | 2016-06-29 | 大唐环境产业集团股份有限公司 | Denitrating coal economizer high-temperature bypass device |
| CN105771649A (en) * | 2016-05-06 | 2016-07-20 | 哈尔滨工程大学 | Composite device for aftertreatment of ship low-speed diesel engine end gas |
| CN106823792A (en) * | 2017-03-31 | 2017-06-13 | 华能国际电力股份有限公司玉环电厂 | Full load SCR flue gas denitrification systems |
| CN106931458A (en) * | 2017-02-27 | 2017-07-07 | 华北理工大学 | A kind of four bypass economizer high temperature bypath systems |
| CN106949489A (en) * | 2017-04-24 | 2017-07-14 | 无锡华光工业锅炉有限公司 | SCR inlet cigarette temperature adjusting means for pulverized-coal fired boiler |
| CN106996572A (en) * | 2017-03-21 | 2017-08-01 | 华电电力科学研究院 | Solve the flue gas recirculation structure and method of SCR denitration underrun dust stratification abrasion |
| CN107497268A (en) * | 2017-10-13 | 2017-12-22 | 广东丰乐能源科技有限公司 | A kind of coal-fired flue-gas processing system and coal-burning boiler system |
| CN107883391A (en) * | 2017-12-12 | 2018-04-06 | 上海交通大学 | A kind of anti-wear system of π types boiler flue |
-
2015
- 2015-05-14 CN CN201520309131.8U patent/CN204629541U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716100A (en) * | 2016-03-31 | 2016-06-29 | 大唐环境产业集团股份有限公司 | Denitrating coal economizer high-temperature bypass device |
| CN105771649A (en) * | 2016-05-06 | 2016-07-20 | 哈尔滨工程大学 | Composite device for aftertreatment of ship low-speed diesel engine end gas |
| CN106931458A (en) * | 2017-02-27 | 2017-07-07 | 华北理工大学 | A kind of four bypass economizer high temperature bypath systems |
| CN106996572A (en) * | 2017-03-21 | 2017-08-01 | 华电电力科学研究院 | Solve the flue gas recirculation structure and method of SCR denitration underrun dust stratification abrasion |
| CN106823792A (en) * | 2017-03-31 | 2017-06-13 | 华能国际电力股份有限公司玉环电厂 | Full load SCR flue gas denitrification systems |
| CN106823792B (en) * | 2017-03-31 | 2023-09-26 | 华能国际电力股份有限公司玉环电厂 | Full-load SCR flue gas denitration system |
| CN106949489A (en) * | 2017-04-24 | 2017-07-14 | 无锡华光工业锅炉有限公司 | SCR inlet cigarette temperature adjusting means for pulverized-coal fired boiler |
| CN107497268A (en) * | 2017-10-13 | 2017-12-22 | 广东丰乐能源科技有限公司 | A kind of coal-fired flue-gas processing system and coal-burning boiler system |
| CN107883391A (en) * | 2017-12-12 | 2018-04-06 | 上海交通大学 | A kind of anti-wear system of π types boiler flue |
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