CN203777929U - Denitrating device under integrated control - Google Patents
Denitrating device under integrated control Download PDFInfo
- Publication number
- CN203777929U CN203777929U CN201420201579.3U CN201420201579U CN203777929U CN 203777929 U CN203777929 U CN 203777929U CN 201420201579 U CN201420201579 U CN 201420201579U CN 203777929 U CN203777929 U CN 203777929U
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- China
- Prior art keywords
- pipeline
- ammonium water
- boiler
- denitrating
- pump
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Abstract
The utility model provides a denitrating device under integrated control, which is characterized in that an ammonium water storage tank is connected with an ammonium water distribution box through a pipeline, an ammonium water pump is connected with an ammonium water injector arranged in a boiler through a pipeline, a gas pump is connected with a gas storage tank, a compressed air pipe and the ammonium water pipe are respectively connected with the interior of the boiler, an air pre-heater is connected between a gas conveying pipeline and a smoke outlet pipeline, the smoke outlet pipeline is connected with a smoke discharger, an ammonium water pumping station is connected with a PLC (Programmable Logic Controller), and a metering distributor is connected to an ammonium water pipeline and the gas conveying pipeline. The ammonium water pump and a control device form the ammonium water pumping station. The device provided by the utility model controls operation of the ammonium water pumping station by the PLC, and meanwhile, the whole denitrating system is balanced in operation. By means of the SNCR (Selective Non Catalytic Reduction) denitrating principle, nitrate nitrogen in combustion smoke of the boiler is denitrated. The device has the advantages of accurate control, stable system operation, good denitrating effect and convenience in integral control, and is suitable for being applied as a flue gas denitrating device for the boiler.
Description
Technical field
The utility model provides field of Environment Protection and purifies air, and prevents that nitrogen oxide from polluting the integrated control denitrification apparatus of application.
Background technology
One SNCR denitration technology:
One is sprayed ammonia or urea etc. containing using NH in flue gas
3the reducing agent of base is in high temperature range, optionally the NO in flue gas
xbe reduced to N
2and H
20.Research shows, in 927-1093 DEG C of temperature range, under the effect of catalyst-free, the amino reductives such as ammonia or urea are optionally the NO in flue gas
xbe reduced to N
2and H
20, substantially not with flue gas in oxygen effect, developed accordingly SNCR method.
Two, denitrating technique:
1. SNCR integral process is introduced nitrogen oxide (NO
x) be the gas that the oxidation due to nitrogen produces in burning process process, the respiratory system that it not only stimulates people, infringement animals and plants, damage the ozone layer, and are to cause one of greenhouse effects, acid rain and photochemically reactive main matter.All over the world to NO
xemission limit set require to be all tending towards strict, and thermal power plant, garbage burning factory and cement plant etc. are as NO
xthe main source of gas discharging, it reduces discharging the attention being subject to especially especially.
The whole world reduces boiler of power plant NO at present
xdischarge effective main method and be broadly divided into following four kinds:
(1), low nitrogen burning technology, in combustion process, control the generation of nitrogen oxide, be mainly applicable to large coal-fired boiler etc.; Low NO
xcombustion technology can only reduce NO
xthe 30-50% of discharge value, further reduce NO
xdischarge, must adopt gas denitrifying technology.
(2), SCR technology, (Se1ective Catalytic Reduction, SNCR), is mainly used in large coal-fired boiler, is to apply maximum methods in current China gas denitrifying technology.
(3), SNCR technology, (SNCR, Se1ective Nor%ta1ytic Reduction), is mainly used in the medium or mini type boilers such as garbage burning factory, technology maturation, but its efficiency is low compared with SCR method is invested littlely, the construction period is short.
(4) SCR technology, (SCR)+SNCR technology (SNCR), is mainly used in the low NO of large coal-fired boiler
xdischarge and the limited situation in place, be also relatively suitable for old boiler transformation project.
Currently used denitration technology, is mainly made up of discrete denitrification apparatus, exists to control to disperse the problem that operational efficiency is low and denitration effect can not touch the mark.
Summary of the invention
In order to realize the integrated operation of denitrification apparatus, the utility model provides denitrification integral control device.This device, by running and the overall system operation of PLC controller control ammoniacal liquor pumping plant, solves the technical problem of the integrated control of denitration of boiler smoke.
The scheme that the utility model technical solution problem adopts is:
Tank used for storing ammonia is connected with ammoniacal liquor distributor box by pipeline, aqua ammonia pump is connected with the ammonia water spray device being located in boiler by pipeline, air pump is connected with air accumulator, compressed air hose is connected with in boiler respectively with ammonia water pipe, between air delivering pipeline and smoke pipeline, be connected with air preheater, smoke pipeline is connected with fume emission device, and ammoniacal liquor pumping plant is connected with PLC controller, on ammoniacal liquor pipeline and air delivering pipeline, is connected with metered dose dispensers.
Aqua ammonia pump and control device form ammoniacal liquor pumping plant.
Good effect, the utility model, by the running of PLC controller control ammoniacal liquor pumping plant, makes whole denitrating system balance movement simultaneously, utilizes SNCR denitration principle, and the nitrate nitrogen in boiler combustion flue gas is carried out to denitration.Have precise control, system operates steadily, and denitration effect is good, is convenient to the advantage of integrated control.The suitable application of installation as denitration of boiler smoke.
Brief description of the drawings
Fig. 1 is the utility model composition diagram
Fig. 2 is the utility model working state schematic representation
In figure, 1. tank used for storing ammonia, 1.1. aqua ammonia pump, 1.2. ammonia water spray device, 2, ammoniacal liquor distributor box, 3. air accumulator, 4. ammoniacal liquor pumping plant, 5. metered dose dispensers, 6.PLC controller, 7. compressed air hose, 8. ammonia water pipe, 9. boiler, 9.1. pipeline burner, 10. air pump, 11. air preheaters, 12. fume emission devices.
Detailed description of the invention
According to the figure, tank used for storing ammonia 1 is connected with ammoniacal liquor distributor box 2 by pipeline, aqua ammonia pump 1.1 is connected with the ammonia water spray device 1.2 being located in boiler 9 by pipeline, air pump 10 is connected with air accumulator 3, compressed air hose 7 and ammonia water pipe 8 are connected with boiler 9 is interior respectively, between air delivering pipeline and smoke pipeline, are connected with air preheater 11, and smoke pipeline is connected with fume emission device 12, ammoniacal liquor pumping plant 4 is connected with PLC controller 6, is connected with metered dose dispensers 5 on ammoniacal liquor pipeline and air delivering pipeline.
Aqua ammonia pump and control device form ammoniacal liquor pumping plant.
Described integrated control is by PLC controller integral control ammoniacal liquor input quantity, and emitted dose and the compressed-air actuated amount of sending into, make boiler temperature, flue gas discharge capacity and the coordinating and unifying of ammoniacal liquor supply.
Operation principle:
SNCR SNCR denitrating technique, is by the reducing agent ammonia, ammoniacal liquor or the urea that contain NHx base, sprays into 900 DEG C of-1100 DEG C of burner hearth regions, and the rapid thermal decomposition of this reducing agent becomes NH
3with other accessory substance, subsequently NH
3with the NO in flue gas
xcarry out SNCR reaction and generate N
2and H
20.
Feature:
The utility model can be realized the control of boiler combustion denitrification integral, therefore, compared with unidirectional control technology respectively, has superiority.
Claims (1)
1. integrated control denitrification apparatus, it is characterized in that: tank used for storing ammonia (1) is connected with ammoniacal liquor distributor box (2) by pipeline, aqua ammonia pump (1.1) is connected with the ammonia water spray device (1.2) being located in boiler (9) by pipeline, air pump (10) is connected with air accumulator (3), compressed air hose (7) is connected with in boiler (9) respectively with ammonia water pipe (8), between air delivering pipeline and smoke pipeline, be connected with air preheater (11), smoke pipeline is connected with fume emission device (12), ammoniacal liquor pumping plant (4) is connected with PLC controller (6), on ammoniacal liquor pipeline and air delivering pipeline, be connected with metered dose dispensers (5),
Aqua ammonia pump and control device form ammoniacal liquor pumping plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201579.3U CN203777929U (en) | 2014-04-24 | 2014-04-24 | Denitrating device under integrated control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201579.3U CN203777929U (en) | 2014-04-24 | 2014-04-24 | Denitrating device under integrated control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203777929U true CN203777929U (en) | 2014-08-20 |
Family
ID=51314158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420201579.3U Expired - Fee Related CN203777929U (en) | 2014-04-24 | 2014-04-24 | Denitrating device under integrated control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203777929U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933853A (en) * | 2014-04-24 | 2014-07-23 | 绥中捷创科技有限公司 | Integrally controlled denitration device |
-
2014
- 2014-04-24 CN CN201420201579.3U patent/CN203777929U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933853A (en) * | 2014-04-24 | 2014-07-23 | 绥中捷创科技有限公司 | Integrally controlled denitration device |
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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: 20140820 Termination date: 20150424 |
|
| EXPY | Termination of patent right or utility model |