CN205164506U - Wide load deNOx systems of coal fired power plant - Google Patents
Wide load deNOx systems of coal fired power plant Download PDFInfo
- Publication number
- CN205164506U CN205164506U CN201520844442.4U CN201520844442U CN205164506U CN 205164506 U CN205164506 U CN 205164506U CN 201520844442 U CN201520844442 U CN 201520844442U CN 205164506 U CN205164506 U CN 205164506U
- Authority
- CN
- China
- Prior art keywords
- flue
- power plant
- wide load
- coal
- ammonia
- 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
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model relates to a wide load deNOx systems of coal fired power plant, including flue, governing valve and controller, be equipped with fan, gas baffle, ammonia nozzle array and catalyst along flue gas flow in the flue, the governing valve is located on the ammonia nozzle array, gas baffle and governing valve are connected respectively to the controller. Compared with the prior art, the utility model has the advantages of save urea raw materials, extension catalyst life, be the energy saving and emission reduction of enterprise, improve denitration efficiency and reduce ammonia escape rate.
Description
Technical field
The utility model relates to denitration technology field, especially relates to the wide load denitrating system in a kind of coal-burning power plant.
Background technology
The NO of coal-burning power plant
xdischarge must meet the environmental protection policy of country.Current power plant is all equipped with SCR equipment for denitrifying flue gas, but when boiler load drops to below 60%, flue-gas temperature can not meet the technical requirement of SCR cannot denitration.And regulating units ruuning situation by chance generally operates in less than 60%, this just brings the difficulty that cannot go beyond to environmental protection.Cause economic loss to enterprise, environment is polluted, and social influence is very big.And adopt wide load denitration technology effectively can change this situation, ensure that when underload SCR drops into.
But, although wide load denitration technology can ensure the NO when underload
xemission compliance, because technical limitation makes smoke distribution in flue uneven, the thermo parameters method temperature difference is larger.Cause wastage of material, and injury catalyst.Power plants generating electricity cost is increased the weight of, and recondition expense increases.
Utility model content
The purpose of this utility model is exactly provide a kind of coal-burning power plant wide load denitrating system to overcome defect that above-mentioned prior art exists, have save urea raw material, extending catalyst life-span, be that industry energy conservation reduces discharging, improves denitration efficiency and reduce the advantages such as the escaping of ammonia rate.
The purpose of this utility model can be achieved through the following technical solutions:
The wide load denitrating system in a kind of coal-burning power plant, comprise flue, control valve and controller, be provided with blower fan, gas baffle, ammonia nozzle array and catalyst along flue gas flow direction in described flue, described control valve is located on ammonia nozzle array, and described controller connects gas baffle and control valve respectively.
Described ammonia nozzle array comprises multiple nozzle be positioned on same flue cross section, and described control valve is multiple, be positioned at gas baffle stop side each nozzle on a control valve is set.
Described nozzle is 10 ~ 14.
The uniform setting of multiple nozzle.
Described flue is multiple, and the porch of each flue is provided with the isolating baffle of connection control device.
Described flue is two.
Described control valve is magnetic valve.
Compared with prior art, the utility model has the following advantages:
1) cause because of jet pipe always simultaneous equal injection the defect that cost increases, reduces catalyst service life for existing wide load denitration technology, by controller according to different operating mode, adjust the ammonia flow sprayed in flue, under guarantee denitration efficiency prerequisite, save urea raw material, the extending catalyst life-span, for industry energy conservation reduces discharging;
2) to each Flue duct design one isolating baffle, when one-sided fan operation, the isolating baffle that controller controls other is closed, fume centralized is flowed to one-sided, to improve flue gas flow rate, guarantee that flue gas is in strong turbulent condition, its effect can not only play fully mixing of flue gas and ammonia, also the exhaust gas volumn on section and temperature field can be made more to be tending towards even simultaneously, and the catalyst of other positions is in " rest " state, so both can improve denitration efficiency and reduce the escaping of ammonia rate, again can the extending catalyst life-span, finally reach cost-saving and reduce the bumper harvests of discharging,
3) structure is simple, and the construction period is short, only needs to transform flue, is suitable for the denitration flow process of various coal unit;
4) control simply, reliability is high, and magnetic valve selected by control valve, and then realizes Automated condtrol by controller;
5) technique is simple, and improvement cost is low, and cost efficiency is effective.
Accompanying drawing explanation
Fig. 1 is the utility model overall structure schematic diagram;
Fig. 2 is ammonia nozzle array scheme of installation in the utility model.
In figure: 1, flue, 2, control valve, 3, blower fan, 4, gas baffle, 5, ammonia nozzle array, 6, catalyst, 7, nozzle, 8, isolating baffle, 9, ammonia pipeline, 10, ammonia entrance master switch.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.The present embodiment is implemented premised on technical solutions of the utility model, give detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
As shown in Figure 1, the wide load denitrating system in a kind of coal-burning power plant, comprise flue 1, control valve 2 and controller, blower fan 3, gas baffle 4, ammonia nozzle array 5 and catalyst 6 is provided with along flue gas flow direction in flue 1, control valve 2 is located on ammonia nozzle array 5, and controller connects gas baffle 4 and control valve 2 respectively.Control valve 2 is magnetic valve.
As shown in Figure 2, ammonia nozzle array 5 comprises multiple nozzle 7 be distributed on same flue 1 cross section, nozzle 7 connects corresponding ammonia pipeline 9, the porch of ammonia pipeline 9 arranges ammonia entrance master switch 10, control valve 2 is multiple, is positioned on each nozzle 7 that gas baffle 4 stops side and arranges a control valve 2.Nozzle 7 is 10 ~ 14.
Flue 1 is multiple, and the porch of each flue 1 is provided with the isolating baffle 8 of connection control device.
In the present embodiment, flue 1 is divided into two, the ammonia nozzle array 5 of each flue 1 arranges 12 nozzles 7,12 nozzles 7 are set up in parallel along a side of flue 1, ammonia is sprayed in flue 1, in prior art, in operation 12 jet pipes be simultaneously, equivalent sprays and do not change with load variations.When load is low to a timing, wide load gas baffle 4 is closed, and at this moment fume centralized is in the inner side of two flues 1, experiment shows that the domestic and abroad survey exhaust gas volumn of flue 1 is few, and temperature is lower, but the ammonia spraying amount of outer nozzle 7 does not reduce, cause urea wastage of material, and also unfavorable to catalyst 6.Therefore, gas baffle 4 stops that side is the outside of flue 1, then nozzle 7 corresponding position that is outer at flue 1, middle side arranges 7 control valves 2, and the nozzle 7 making the domestic and abroad survey of flue 1 is that flow is adjustable, and controller is according to SCR (SCR technology) flue temperature field distribution, determine flue gas turbulent flow situation in flue 1, under different operating mode, adjust the ammonia flow sprayed in flue 1, reach and save urea raw material, extending catalyst 6 life-span, for industry energy conservation reduces discharging.
Time below 150MW load or in boiler startup process, for saving station service, power plant carries out one-sided blower fan 3 and runs, because exhaust gas volumn reduces, flue gas flow rate is reduced, put into operation 2 SCR more simultaneously, ammonia can be caused with flue gas to mix uneven phenomenon, make the negative effect that denitration efficiency reduces and the escaping of ammonia rate increases on the contrary.Therefore, in SCR porch, isolating baffle 8 is installed, when one-sided blower fan 3 runs, the isolating baffle 8 of side SCR entrance is closed, fume centralized is flowed to one-sided to improve flue gas flow rate, guarantee that flue gas is in strong turbulent condition, its effect can not only play fully mixing of flue gas and ammonia, the exhaust gas volumn on section and temperature field also can be made more to be tending towards even simultaneously.And opposite side catalyst 6 is in " rest " state.So both can improve denitration efficiency and reduce the escaping of ammonia rate, again can extending catalyst 6 life-span.Finally reach cost-saving and reduce the bumper harvests of discharging.
Claims (7)
1. the wide load denitrating system in coal-burning power plant, comprise flue (1), blower fan (3), gas baffle (4), ammonia nozzle array (5) and catalyst (6) is provided with along flue gas flow direction in described flue (1), it is characterized in that, also comprise control valve (2) and controller, described control valve (2) is located on ammonia nozzle array (5), and described controller connects gas baffle (4) and control valve (2) respectively.
2. the wide load denitrating system in a kind of coal-burning power plant according to claim 1, it is characterized in that, described ammonia nozzle array (5) comprises multiple nozzle (7) be positioned on same flue (1) cross section, described control valve (2) for multiple, be positioned at gas baffle (4) stop side each nozzle (7) on a control valve (2) is set.
3. the wide load denitrating system in a kind of coal-burning power plant according to claim 2, is characterized in that, described nozzle (7) is 10 ~ 14.
4. the wide load denitrating system in a kind of coal-burning power plant according to claim 2, is characterized in that, multiple nozzle (7) uniform setting.
5. the wide load denitrating system in a kind of coal-burning power plant according to claim 1, is characterized in that, described flue (1) is for multiple, and the porch of each flue (1) is provided with the isolating baffle (8) of connection control device.
6. the wide load denitrating system in a kind of coal-burning power plant according to claim 5, is characterized in that, described flue (1) is two.
7. the wide load denitrating system in a kind of coal-burning power plant according to claim 1, is characterized in that, described control valve (2) is magnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520844442.4U CN205164506U (en) | 2015-10-28 | 2015-10-28 | Wide load deNOx systems of coal fired power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520844442.4U CN205164506U (en) | 2015-10-28 | 2015-10-28 | Wide load deNOx systems of coal fired power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205164506U true CN205164506U (en) | 2016-04-20 |
Family
ID=55728545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520844442.4U Expired - Fee Related CN205164506U (en) | 2015-10-28 | 2015-10-28 | Wide load deNOx systems of coal fired power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205164506U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108854522A (en) * | 2018-07-02 | 2018-11-23 | 浙江宜清环境技术有限公司 | A kind of heating of full working scope denitration flue gas and even distribution device based on internal baffle |
-
2015
- 2015-10-28 CN CN201520844442.4U patent/CN205164506U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108854522A (en) * | 2018-07-02 | 2018-11-23 | 浙江宜清环境技术有限公司 | A kind of heating of full working scope denitration flue gas and even distribution device based on internal baffle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106621804B (en) | Flue gas ammonia injection mixing device and SCR flue gas denitration system | |
| CN103480254B (en) | Anti-blocking ammonia spraying grid for SCR (Selective Catalytic Reduction) denitration system | |
| CN203316007U (en) | Selective catalytic reduction denitration system for sintering flue gas | |
| CN203043817U (en) | Selective catalytic reduction (SCR) denitration system capable of increasing flue gas temperature by utilizing high-temperature steam | |
| CN203862139U (en) | Denitration system for flue | |
| CN103638805B (en) | A kind of CFB boiler SNCR denitration method for flue gas of dual reducting agents | |
| CN103877837A (en) | Flue ozone distributor applied to low-temperature oxidation denitration technology and arrangement manner thereof | |
| CN203517748U (en) | Temperature controllable coal economizer | |
| CN103816784A (en) | Flue ozone distributor, and arrangement mode and application thereof | |
| CN203927880U (en) | A kind of economizer that improves SCR system underrun denitration ability | |
| CN107008144B (en) | Device for realizing SCR flue gas denitration multistage ammonia spraying and flue gas denitration method | |
| CN208320482U (en) | Denitrating flue gas auxiliary heating system under a kind of depth regulating units ultra-low load | |
| CN103551033A (en) | Scr denitration device and flue gas denitration method | |
| CN209302522U (en) | A kind of SNCR denitration device | |
| CN105727735A (en) | Multi-tank easy-to-maintain denitration apparatus | |
| CN205164506U (en) | Wide load deNOx systems of coal fired power plant | |
| CN207025089U (en) | A kind of ammonia system processed that urea pyrolysis is directly realized using high temperature flue-gas from boiler | |
| CN203564958U (en) | Ammonia injection grid for flue gas denitration | |
| CN203525566U (en) | Anti-blocking type ammonia spraying grid for SCR (Selective Catalytic Reduction) denitration system | |
| CN211462689U (en) | Ammonia spraying device for flue gas denitration and flue gas denitration system | |
| CN106178946A (en) | Method for realizing integral embedded type smelting flue gas denitration system | |
| CN102166472A (en) | Spiral-flow type ammonia spraying device used for selective catalytic reduction (SCR) denitrification system | |
| CN204543995U (en) | A kind of cement kiln end low-temperature smoke air SCR denitrification apparatus | |
| CN107456868A (en) | A kind of ammonia-gas spraying device for SCR denitration reactor | |
| CN203771375U (en) | Coal economizer for increasing flue-gas temperature at SCR system entrance |
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: 20160420 Termination date: 20161028 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |