CN203862139U - Denitration system for flue - Google Patents
Denitration system for flue Download PDFInfo
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- CN203862139U CN203862139U CN201420286557.1U CN201420286557U CN203862139U CN 203862139 U CN203862139 U CN 203862139U CN 201420286557 U CN201420286557 U CN 201420286557U CN 203862139 U CN203862139 U CN 203862139U
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- Prior art keywords
- flue
- reactor
- boiler
- denitrating system
- bypass
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 40
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003546 flue gas Substances 0.000 claims abstract description 34
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 18
- 239000003054 catalyst Substances 0.000 claims abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 20
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract 2
- 238000010531 catalytic reduction reaction Methods 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 206010022000 influenza Diseases 0.000 description 3
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a denitration system for a flue. The system comprises an ammonia storage tank and a reactor, wherein the ammonia storage tank is used for storing ammonia; the reactor is communicated with the ammonia storage tank and provided with a catalyst module; the reactor is used for denitrating flue gas in a boiler flue based on the selective catalytic reduction; the reactor is provided with a flue gas inlet; a heating structure is arranged in the boiler flue; the heating structure divides the boiler flue into an upstream flue and a downstream flue; the flue gas inlet is communicated with the downstream flue; furthermore, the flue gas inlet is connected with a bypass flue; the flue gas inlet of the bypass flue is communicated with the upstream flue. According to the denitration system for the flue, high temperature flue gas at the inlet of the heated structure is led to the inlet of the reactor through the bypass flue when a boiler is in low load operation, so that the temperature of mixed flue gas entered the reactor is increased, further, the activity of the catalyst in the reactor is improved, the flue gas denitration efficiency is improved, and the denitration cost is reduced.
Description
Technical field
The utility model relates to the technical field of boiler operatiopn in power plant, particularly relates to a kind of flue denitrating system.
Background technology
At present, power plant adopts SCR (SCR) technique to carry out denitration conventionally.Denitrating system is generally made up of scr reactor, catalyst module, ammonia storage and feed system, ammonia spraying system and relevant test control system etc.
Wherein, catalyst module is placed on the form of fixed bed in the flue of scr reactor, and at catalyst fixed bed upstream region, NH3 is injected in flue and mixes with flue gas.When smoke gas flow is when catalyst fixed bed, NH3 reacts and generates N2 with the nitrogen oxide in flue gas in the presence of catalyst, realizes denitration.
But the active temperature of catalyst is between 280 DEG C～400 DEG C, the flue-gas temperature that boiler enters reactor in the time of underrun is lower, larger to the activity influence of catalyst, causes denitration efficiency greatly to reduce.And because renewal or the regeneration expense of catalyst are comparatively expensive, therefore, the denitration efficiency while improving boiler of power plant underload is necessary.
Utility model content
In view of this, the utility model is intended to propose a kind of flue denitrating system, to improve the denitration efficiency of boiler of power plant when the underrun.
The utility model flue denitrating system comprises storage ammonia tank and reactor.Wherein, storage ammonia tank is for storage of ammonia; Described reactor is connected with described storage ammonia tank, is provided with catalyst module, and this reactor is for carrying out denitration based on SCR to the flue gas of boiler flue; Described reactor is provided with gas approach; In described boiler flue, be provided with heated structure; Described boiler flue is divided into upstream flue and downstream flue by described heated structure; Described gas approach is connected with described downstream flue; And described gas approach is also connected with bypass flue, the gas approach of described bypass flue is connected with described upstream flue.
Further, in above-mentioned flue denitrating system, in described bypass flue, be also provided with flue gas flow control device.
Further, in above-mentioned flue denitrating system, described flue gas flow control device is the adjustable baffle plate of aperture.
Further, in above-mentioned flue denitrating system, the diameter of described bypass flue is less than the diameter of described downstream flue.
Further, in above-mentioned flue denitrating system, described heated structure is economizer.
Further, in above-mentioned flue denitrating system, described bypass flue is arranged at the porch of described economizer.
Further, in above-mentioned flue denitrating system, the outlet of described reactor is connected with air preheater.
Further, in above-mentioned flue denitrating system, the outlet of described air preheater is also connected with deduster.
Further, in above-mentioned flue denitrating system, described boiler flue is vertical well gas flue.
Than prior art, the utlity model has following beneficial effect:
When power plant boiler is during in underrun, the utility model flue denitrating system by heated structure (for example, economizer) porch high-temperature flue gas (in other words, the high-temperature flue gas of heated structure upstream) guide to reactor inlet by bypass, and then raising enters the temperature of mixed flue gas in reactor, the flue-gas temperature that enters reactor by raising improves denitration effect when boiler at low load, improves catalyst utilization, reduces denitration cost.
Brief description of the drawings
The accompanying drawing that forms a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the utility model flue denitrating system preferred embodiment;
Fig. 2 is in the utility model flue denitrating system, the structure intention of bypass flue;
Fig. 3 is in the utility model flue denitrating system, the annexation schematic diagram of bypass flue and vertical well gas flue.
Description of reference numerals
1 air preheater
2 dedusters
3 economizers
4 upstream flues
5 chimneys
6 reactors
7 bypass flues
8 boilers
9 storage ammonia tanks
10 downstream flues
11 baffle plates
12 reactor gas approach
Detailed description of the invention
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the utility model can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Below in conjunction with Fig. 1 to Fig. 3, the preferred embodiment of the utility model flue gas denitrification system is described further.
The present embodiment flue denitrating system comprises storage ammonia tank 9 and reactor 6.Storage ammonia tank 9 is for storage of ammonia; Reactor 6 is connected with storage ammonia tank 9, in reactor 6, is provided with catalyst module, and reactor 6 is for carrying out denitration by SCR to the flue gas of boiler flue.Reactor 6 is provided with reactor gas approach 12; In boiler flue, be provided with economizer 3; Boiler flue is divided into upstream flue 4 and downstream flue 10 by economizer 3; Reactor gas approach 12 is connected with downstream flue 10; And reactor gas approach 12 is also connected with bypass flue 7, the gas approach of bypass flue 7 is connected with upstream flue 4.
Preferably selection of land, the present embodiment bypass flue 7 is installed on economizer 4 gas approach places, and bypass flue 7 converges at reactor gas approach 12 places of reactor 6 with the downstream flue 10 of horizontal segment.
It should be noted that, in the present embodiment, adopt economizer 3 that boiler flue is divided into upstream flue 4 and downstream flue 10, also can adopt other heated structures, for example, superheater, reheater.The utility model is in this no limit.
When power plant boiler is during in underrun, the present embodiment flue denitrating system by heated structure (for example, economizer) porch high-temperature flue gas (in other words, the high-temperature flue gas of heated structure upstream) guide to the entrance of reactor 6 by bypass, and then improve enter reactor 6 interior mixed flue gas temperature, the flue-gas temperature that enters reactor 6 by raising improves denitration effect when boiler at low load, improves catalyst and falls utilization rate, low denitration cost.
It can also be seen that from Fig. 1, be also provided with flue gas flow control device in bypass flue 7, this flue gas flow control device is the adjustable baffle plate of aperture 11, and the effect of baffle plate 11 is to regulate the flow that is mixed into the high-temperature flue gas in reactor 6:
(1) when boiler of power plant is during in underrun, the aperture of baffle plate 11 can be become to large, increase the flow that enters the high-temperature flue gas in reactor 6, and then improve the flue-gas temperature in reactor 6, like this, catalyst module can be given full play to its catalytic efficiency, improves the effect of denitrating flue gas.
(2) certain, when power plant is during in normal duty or heavy-duty service, the aperture of baffle plate 11 can be diminished or closes, determine according to actual condition.Preferably, the diameter of bypass flue 7 is less than the diameter of downstream flue 10.
It should be noted that, the baffle plate 11 that aperture can regulate is only a kind of concrete way of realization of flue gas flow control device, for a person skilled in the art, also has other can realize the structure of flow-control, such as flow control valves etc., the utility model does not repeat them here.
In the present embodiment, the outlet of reactor 6 is connected with air preheater 1.The outlet of air preheater 1 is also connected with deduster 2; The outlet of deduster 2 connects chimney 5.And boiler flue is vertical well gas flue.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. a flue denitrating system, comprising:
Storage ammonia tank (9), for storage of ammonia;
Reactor (6), is connected with described storage ammonia tank (9), is provided with catalyst module, and this reactor (6) is for carrying out denitration based on SCR to the flue gas of boiler flue;
It is characterized in that,
Described reactor (6) is provided with reactor gas approach (12);
In described boiler flue, be provided with heated structure;
Described boiler flue is divided into upstream flue (4) and downstream flue (10) by described heated structure;
Described reactor gas approach (12) is connected with described downstream flue (10); And
Described reactor gas approach (12) is also connected with bypass flue (7), and the gas approach of described bypass flue (7) is connected with described upstream flue (4).
2. flue denitrating system according to claim 1, is characterized in that,
Described bypass flue is also provided with flue gas flow control device in (7).
3. flue denitrating system according to claim 2, is characterized in that,
Described flue gas flow control device is the adjustable baffle plate of aperture (11).
4. flue denitrating system according to claim 3, is characterized in that,
The diameter of described bypass flue (7) is less than the diameter of described downstream flue (10).
5. flue denitrating system according to claim 4, is characterized in that,
Described heated structure is economizer (3).
6. flue denitrating system according to claim 5, is characterized in that,
Described bypass flue (7) is arranged at the porch of described economizer (3).
7. flue denitrating system according to claim 6, is characterized in that
The outlet of described reactor (6) is connected with air preheater (1).
8. flue denitrating system according to claim 7, is characterized in that,
The outlet of described air preheater (1) is also connected with deduster (2);
The outlet of described deduster (2) connects chimney (5).
9. flue denitrating system according to claim 8, is characterized in that,
Described boiler flue is vertical well gas flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420286557.1U CN203862139U (en) | 2014-05-30 | 2014-05-30 | Denitration system for flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420286557.1U CN203862139U (en) | 2014-05-30 | 2014-05-30 | Denitration system for flue |
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| CN203862139U true CN203862139U (en) | 2014-10-08 |
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| CN201420286557.1U Expired - Fee Related CN203862139U (en) | 2014-05-30 | 2014-05-30 | Denitration system for flue |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307359A (en) * | 2014-10-24 | 2015-01-28 | 上海交通大学 | Flue gas denitration device for dispersing fly ash particles, and design method of diversion strip of flue gas denitration device |
| CN104785104A (en) * | 2015-04-07 | 2015-07-22 | 山西大学 | Transformation method for solving problem of lower flue gas temperature of inlet of denitrification device of boiler in thermal power plant |
| CN106178870A (en) * | 2015-05-07 | 2016-12-07 | 嘉兴新嘉爱斯热电有限公司 | A kind of SNCR-SCR combines flue gas denitrification system |
| CN106765035A (en) * | 2015-12-16 | 2017-05-31 | 华电电力科学研究院东北分院 | Improve SCR temperature of reactor system and device and method |
| CN107935084A (en) * | 2017-12-13 | 2018-04-20 | 华电电力科学研究院 | A kind of the desulfurization wastewater Zero discharging system and method for the wide load denitration of cooperative achievement |
| CN108325384A (en) * | 2018-04-12 | 2018-07-27 | 山东联盛环保科技有限公司 | A kind of full load equipment for denitrifying flue gas |
| CN108386858A (en) * | 2018-03-03 | 2018-08-10 | 浙江安吉天子湖热电有限公司 | A kind of smoke processing system of denitration desulfurization and dedusting |
| CN108939900A (en) * | 2017-05-17 | 2018-12-07 | 昆山市三维换热器有限公司 | Flue-gas denitration process system |
| CN108939900B (en) * | 2017-05-17 | 2024-06-28 | 昆山市三维换热器有限公司 | Flue gas denitration process system |
-
2014
- 2014-05-30 CN CN201420286557.1U patent/CN203862139U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307359A (en) * | 2014-10-24 | 2015-01-28 | 上海交通大学 | Flue gas denitration device for dispersing fly ash particles, and design method of diversion strip of flue gas denitration device |
| CN104307359B (en) * | 2014-10-24 | 2017-09-08 | 上海交通大学 | Equipment for denitrifying flue gas and its flow guide bar design method for disperseing fly ash granule |
| CN104785104A (en) * | 2015-04-07 | 2015-07-22 | 山西大学 | Transformation method for solving problem of lower flue gas temperature of inlet of denitrification device of boiler in thermal power plant |
| CN106178870A (en) * | 2015-05-07 | 2016-12-07 | 嘉兴新嘉爱斯热电有限公司 | A kind of SNCR-SCR combines flue gas denitrification system |
| CN106178870B (en) * | 2015-05-07 | 2019-01-08 | 嘉兴新嘉爱斯热电有限公司 | A kind of SNCR-SCR joint flue gas denitrification system |
| CN106765035A (en) * | 2015-12-16 | 2017-05-31 | 华电电力科学研究院东北分院 | Improve SCR temperature of reactor system and device and method |
| CN108939900A (en) * | 2017-05-17 | 2018-12-07 | 昆山市三维换热器有限公司 | Flue-gas denitration process system |
| CN108939900B (en) * | 2017-05-17 | 2024-06-28 | 昆山市三维换热器有限公司 | Flue gas denitration process system |
| CN107935084A (en) * | 2017-12-13 | 2018-04-20 | 华电电力科学研究院 | A kind of the desulfurization wastewater Zero discharging system and method for the wide load denitration of cooperative achievement |
| CN108386858A (en) * | 2018-03-03 | 2018-08-10 | 浙江安吉天子湖热电有限公司 | A kind of smoke processing system of denitration desulfurization and dedusting |
| CN108325384A (en) * | 2018-04-12 | 2018-07-27 | 山东联盛环保科技有限公司 | A kind of full load equipment for denitrifying flue gas |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: INNER MONGOLIA RUITE YOUHUA TECHNOLOGY CO., LTD. Free format text: FORMER NAME: INNER MONGOLIA RUITE TECHNOLOGY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: Hui District, Hohhot city 010020 the Inner Mongolia Autonomous Region Xilin Road No. 9 Yindu building block A room 1010 Patentee after: INNOR MONGOLIA RUITE OPTIMIZATION SCIENCE & TECHNOLOGY CO.,LTD. Address before: Hui District, Hohhot city 010020 the Inner Mongolia Autonomous Region Xilin Road No. 9 Yindu building block A room 1010 Patentee before: INNER MONGOLIA RUITE TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Denitration system for flue Effective date of registration: 20191015 Granted publication date: 20141008 Pledgee: Industrial Bank Co.,Ltd. Hohhot Branch Pledgor: INNOR MONGOLIA RUITE OPTIMIZATION SCIENCE & TECHNOLOGY CO.,LTD. Registration number: Y2019150000013 |
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| CP01 | Change in the name or title of a patent holder |
Address after: 010020 room 1010, block A, Yin Du building, 9 Xilin Road, Hui man District, Hohhot, the Inner Mongolia Autonomous Region. Patentee after: Ruite Optimization Technology Co.,Ltd. Address before: 010020 room 1010, block A, Yin Du building, 9 Xilin Road, Hui man District, Hohhot, the Inner Mongolia Autonomous Region. Patentee before: INNOR MONGOLIA RUITE OPTIMIZATION SCIENCE & TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230222 Granted publication date: 20141008 Pledgee: Industrial Bank Co.,Ltd. Hohhot Branch Pledgor: INNOR MONGOLIA RUITE OPTIMIZATION SCIENCE & TECHNOLOGY CO.,LTD. Registration number: Y2019150000013 |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 010020 Office building on the east side of Hehuayuan, Qiaohua Century Village, Saihan District, Hohhot, Inner Mongolia Patentee after: INNOR MONGOLIA RUITE OPTIMIZATION SCIENCE & TECHNOLOGY CO.,LTD. Address before: 010020 room 1010, block A, Yin Du building, 9 Xilin Road, Hui man District, Hohhot, the Inner Mongolia Autonomous Region. Patentee before: Ruite Optimization Technology Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 |