CN204380514U - Coal-burning power plant's SCR denitration ammonia blowoff - Google Patents
Coal-burning power plant's SCR denitration ammonia blowoff Download PDFInfo
- Publication number
- CN204380514U CN204380514U CN201520033176.7U CN201520033176U CN204380514U CN 204380514 U CN204380514 U CN 204380514U CN 201520033176 U CN201520033176 U CN 201520033176U CN 204380514 U CN204380514 U CN 204380514U
- Authority
- CN
- China
- Prior art keywords
- ammonia
- blowoff
- coal
- mouth
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 75
- 239000007921 spray Substances 0.000 claims abstract description 36
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003546 flue gas Substances 0.000 claims abstract description 26
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000003082 abrasive agent Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005507 spraying Methods 0.000 abstract description 9
- 108700018263 Brassica oleracea SCR Proteins 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000008676 import Effects 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 229910002089 NOx Inorganic materials 0.000 description 5
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 1
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a kind of coal-burning power plant SCR denitration ammonia blowoff, blowoff is in flue, arrange the spray ammonia mouth be connected with spray ammonia pipe, and it is characterized in that arranging the ammonia flow outgoing direction spraying ammonia mouth is be reverse with flue gas in flue flow direction; Be fixedly installed in the front end of spray ammonia mouth for stopping that in flue gas, particle directly enters the umbrella crown in spray ammonia mouth.The utility model arranges ammonia and flue gas is reverse, effectively extends the time of staying of ammonia at mix stages, strengthens and the flow-disturbing of flue gas and mixed effect, improves SCR denitration import NH
3/ NO
xmixed in molar ratio uniformity; The setting of umbrella crown effectively can avoid spray nozzle clogging, improves the safe and stable operation rate of denitration environmental protection equipment and coal unit.
Description
Technical field
The utility model relates to coal-burning power plant's SCR denitration ammonia blowoff, should in the SCR denitration system of coal-burning power plant, be by ammonia against flue gas direction ejection, extend ammonia in flue gas the time of staying, to reach abundant mixing, avoid particle plug nozzle in flue gas simultaneously.
Background technology
Nitrogen oxide NOx is one of main atmosphere pollution, and nitrogen oxide major part produces when high-temp combustion from fossil fuel and air, comprises nitric oxide NO, nitrogen dioxide NO
2with nitrous oxide N
2o.The 70% direct burning deriving from coal in NOx discharge, wherein thermal power plant is coal-fired rich and influential family, and in the face of increasingly serious Environmental Protection Situation, national policy requires more and more stricter to electricity power enterprise's NOx emission.SCR denitration technology adopts selective catalytic reduction to carry out denitration, i.e. SelectiveCatalytic Reduction, referred to as SCR, SCR denitration technology has higher denitration efficiency, most power plant is adopt SCR denitration method to process, by certain density ammonia NH for flue gas in the world at present
3mix with flue gas in spirt flue gas, in the reactor through catalyst action, by NH
3nontoxic N is generated with NOx reaction
2and H
2o, reaches the object that NOx removes.In actual motion, the uniformity that its denitration performance mixes with ammonia flue gas and mixed flow field situation have direct decisive relation.General employing arranges that in SCR denitration inlet flue duct ammonia-spraying grid is to reach the requirement of ammonia flue gas mixing.Existing ammonia-spraying grid nozzle direction, namely ammonia sprays into direction is identical with flowing to of flue gas, and design considers avoid the direct impulse nozzle of high cloud of dust gas and make it blocking like this.But there is following shortcomings:
One is that ammonia is short in the time of staying of mix stages, not good with the mixed effect of flue gas.Cause SCR denitration import NH
3/ NO
xmixed in molar ratio is uneven, causes denitration efficiency to reduce; The escaping of ammonia exceeds standard; The consumption of ammonia reducing agent increases; Air preheater is because of ammonium hydrogen sulfate NH
4hSO
4the series of problems such as fouling and clogging.
Two is not easily dispelled by flue gas stream after nozzle dust stratification.Walling of flue, ammonia-spraying grid and top steel bracket can progressively drop by dust stratification formation certain thickness in flakes at long-play, the nozzle immediately below blocking.Some power plant's SCR denitration scenes find, the nozzle of adjacent walling of flue all can block substantially.
Three is even in order to reach spray ammonia, and arrange intensive ammonia-spraying grid and nozzle quantity, in 600MW and above generating set, nozzle quantity reaches thousands of, and system cloud gray model pressure drop is large, brings hidden danger to boiler and air-introduced machine safe operation.
Above problem causes the denitration performance of system cloud gray model to have a greatly reduced quality, and operating maintenance cost is high.
Utility model content
The utility model is the weak point for avoiding existing for above-mentioned prior art, and provide a kind of coal-burning power plant SCR denitration ammonia blowoff, to improve ammonia flue gas mixed performance, and then raising system removes NO
xperformance, ensures the safe and stable operation of denitration environmental protection equipment and coal unit.
The utility model coal-burning power plant SCR denitration ammonia blowoff, its feature is: described blowoff arranges in flue and the spray ammonia mouth spraying ammonia pipe and be connected, and it is characterized in that: the ammonia flow outgoing direction arranging described spray ammonia mouth is reverse with flue gas in flue flow direction; Be fixedly installed in the front end of described spray ammonia mouth for stopping that in flue gas, particle directly enters the umbrella crown in spray ammonia mouth.
The utility model coal-burning power plant SCR denitration ammonia blowoff, its feature is also: described spray ammonia mouth is gondola water faucet type nozzle.
The utility model coal-burning power plant SCR denitration ammonia blowoff, its feature is also: umbrella crown is in on coaxial position with described spray ammonia mouth.
Described umbrella crown take high-abrasive material as material.
Described umbrella crown is fixed on spray ammonia pipe by support.
Compared with the prior art, the utility model beneficial effect is embodied in:
1, the utility model arranges ammonia and flue gas is reverse, effectively extends the time of staying of ammonia at mix stages, strengthens and the flow-disturbing of flue gas and mixed effect, improves SCR denitration import NH
3/ NO
xmixed in molar ratio uniformity;
2, arranging of the utility model umbrella crown can avoid spray nozzle clogging, substantially increases the operational efficiency of nozzle;
3, the utility model can simplify ammonia-spraying grid and nozzle quantity, thus reduces cost of investment, reduces system cloud gray model pressure drop, powerful guarantee boiler and air-introduced machine safe operation simultaneously.
4, the utility model device improves SCR denitration efficiency, thus reduces the escaping of ammonia rate, the consumption of ammonia reducing agent and air preheater fouling and clogging.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is nozzle arrangements schematic diagram in the utility model;
Number in the figure: 1 spray ammonia pipe, 2 spray ammonia mouths, 3 umbrella crowns, 4 supports, 5 flues.
Detailed description of the invention
See Fig. 1 and Fig. 2, coal-burning power plant's SCR denitration ammonia blowoff is in flue 5, arrange the spray ammonia mouth 2 be connected with spray ammonia pipe 1, and arranging the ammonia flow outgoing direction spraying ammonia mouth 2 in the present embodiment is be reverse with flow of flue gas direction in flue 5; Be fixedly installed in the front end of spray ammonia mouth for stopping that in flue gas, particle directly enters the umbrella crown 3 in spray ammonia mouth 2, umbrella crown 3 take high-abrasive material as material, is in on coaxial position with spray ammonia mouth 2, is fixed on spray ammonia pipe 1 particular by support 4.
In concrete enforcement, because ammonia outlet pressure is not high, the occlusion effect that umbrella crown 3 can avoid umbrella crown to be formed in nozzle front with the exit separation of spray ammonia mouth 2 is suitably set, also spray ammonia mouth 2 can be set to gondola water faucet type nozzle, more effectively avoid umbrella crown blocking spray ammonia, the spray ammonia pipe 1 shown in Fig. 1 is the ammonia grid playpipe in existing device.
The utility model is by the protective effect of umbrella crown; equidirectional for ammonia spraying into is changed into reverse direction and spray into; strengthen flow-disturbing and mixed effect; be conducive to saving incorporation time; minimizing ammonia mixes distance with flue gas, improves denitration efficiency, can greatly reduce the escaping of ammonia rate and ammonia reducing agent consumption; it also avoid particle and the problem such as grey plug nozzle and air preheater fouling and clogging that falls in flue gas simultaneously, effectively ensure the safe and stable operation of denitration environmental protection equipment and coal unit.
Claims (5)
1. coal-burning power plant's SCR denitration ammonia blowoff, it is characterized in that: described blowoff is in flue (5), arrange the spray ammonia mouth (2) be connected with spray ammonia pipe (1), it is characterized in that: the ammonia flow outgoing direction arranging described spray ammonia mouth (2) is that middle flow of flue gas direction is reverse with flue (5); Be fixedly installed in the front end of described spray ammonia mouth for stopping that in flue gas, particle directly enters the umbrella crown (3) in spray ammonia mouth (2).
2. coal-burning power plant according to claim 1 SCR denitration ammonia blowoff, is characterized in that: described spray ammonia mouth (2) is gondola water faucet type nozzle.
3. coal-burning power plant according to claim 1 and 2 SCR denitration ammonia blowoff, is characterized in that: umbrella crown (3) is in on coaxial position with described spray ammonia mouth (2).
4. coal-burning power plant according to claim 1 SCR denitration ammonia blowoff, is characterized in that: described umbrella crown (3) take high-abrasive material as material.
5. coal-burning power plant according to claim 1 SCR denitration ammonia blowoff, is characterized in that: described umbrella crown (3) is fixed in spray ammonia pipe (1) by support (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520033176.7U CN204380514U (en) | 2015-01-16 | 2015-01-16 | Coal-burning power plant's SCR denitration ammonia blowoff |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520033176.7U CN204380514U (en) | 2015-01-16 | 2015-01-16 | Coal-burning power plant's SCR denitration ammonia blowoff |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204380514U true CN204380514U (en) | 2015-06-10 |
Family
ID=53353271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520033176.7U Expired - Fee Related CN204380514U (en) | 2015-01-16 | 2015-01-16 | Coal-burning power plant's SCR denitration ammonia blowoff |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204380514U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051200A (en) * | 2016-12-28 | 2017-08-18 | 华电电力科学研究院 | A kind of rotary ammonia-spraying grid applied to SCR denitration system |
| CN108744971A (en) * | 2018-08-07 | 2018-11-06 | 国电科学技术研究院有限公司 | Ammonia injection apparatus and denitrating flue gas processing system |
| CN109316902A (en) * | 2018-12-07 | 2019-02-12 | 国电科学技术研究院有限公司 | Multi-point rotary dissipates whirlpool and is mixed stream multi-pollutant advanced purification system |
| CN109589813A (en) * | 2018-12-07 | 2019-04-09 | 国电科学技术研究院有限公司 | Mix dispenser in more rotation jet stream whirlpools |
| CN115364642A (en) * | 2022-09-20 | 2022-11-22 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Denitration system ammonia-injection nozzle anti-blocking device and denitration system |
-
2015
- 2015-01-16 CN CN201520033176.7U patent/CN204380514U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051200A (en) * | 2016-12-28 | 2017-08-18 | 华电电力科学研究院 | A kind of rotary ammonia-spraying grid applied to SCR denitration system |
| CN108744971A (en) * | 2018-08-07 | 2018-11-06 | 国电科学技术研究院有限公司 | Ammonia injection apparatus and denitrating flue gas processing system |
| CN109316902A (en) * | 2018-12-07 | 2019-02-12 | 国电科学技术研究院有限公司 | Multi-point rotary dissipates whirlpool and is mixed stream multi-pollutant advanced purification system |
| CN109589813A (en) * | 2018-12-07 | 2019-04-09 | 国电科学技术研究院有限公司 | Mix dispenser in more rotation jet stream whirlpools |
| CN109316902B (en) * | 2018-12-07 | 2023-06-09 | 国家能源集团科学技术研究院有限公司 | Multi-point cyclone vortex mixing flow equalizing multi-pollutant deep purifying system |
| CN115364642A (en) * | 2022-09-20 | 2022-11-22 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Denitration system ammonia-injection nozzle anti-blocking device and denitration 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: 20150610 Termination date: 20180116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |