CN203447976U - SNCR (selective non-catalytic reduction) denitration device for circulating fluidized bed boiler - Google Patents
SNCR (selective non-catalytic reduction) denitration device for circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN203447976U CN203447976U CN201320527399.XU CN201320527399U CN203447976U CN 203447976 U CN203447976 U CN 203447976U CN 201320527399 U CN201320527399 U CN 201320527399U CN 203447976 U CN203447976 U CN 203447976U
- Authority
- CN
- China
- Prior art keywords
- ammonium hydroxide
- static mixer
- ammonia
- sncr
- pump
- 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 - Lifetime
Links
Images
Landscapes
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model provides an SNCR (selective non-catalytic reduction) denitration device for a circulating fluidized bed boiler. The SNCR denitration device comprises four parts, namely an ammonium hydroxide storing system, an ammonium hydroxide concentration regulating system, distributing and metering devices, and injection systems, wherein in the ammonium hydroxide storing system, an ammonium hydroxide receiving pump is connected at the inlet end of an ammonium hydroxide storing tank, the outlet end of the ammonium hydroxide storing tank is connected with one inlet end of a static mixer through an ammonium hydroxide injection pump, the other inlet end of the static mixer is connected with the ammonium hydroxide concentration regulating system which adopts a diluting water box and a diluting water pump, the outlet end of the static mixer is respectively connected with a plurality of paths of distributing and metering devices, each path of distributing and metering device is correspondingly connected with an injection system, a compressed air station for supplying the injection systems with atomizing air is arranged between the static mixer and the distributing and metering device. The SNCR denitration device used in the circulating fluidized bed boiler has denitration efficiency reaching up to over 50%, and also has the characteristics of low investment cost and operating cost, simple system, and short construction term.
Description
Technical field
The utility model relates to a kind of CFBB SNCR denitrification apparatus, belongs to gas denitrifying technology field.
Background technology
Nitrogen oxide is one of coal fired power plant major pollutants discharged, new < < fossil-fuel power plant atmospheric pollutant emission standard (GB13223-2011) the > > that on January 1st, 2012 promulgates, the regulation that the NOx discharge standard of power plants unit has been made, has all made detailed regulation to the highest permission concentration of emission of the NOx of new and old unit.Strict along with environmental protection system, the control increasingly stringent to station boiler NOx.The new < < fossil-fuel power plant atmospheric pollutant emission standard > > that national environmental protection portion is about to implement to promulgate has adjusted pollutant emission limit, on the other hand, pollution charge for NOx starts, and power plant need use by a large amount of NOx charges for disposing pollutants of the annual payment of discharge capacity.
In June, 2009, national environmental protection portion has worked out the nitrogen oxide Prevention Technique policy > > of < < thermal power plant (exposure draft), has wherein clearly stipulated NO
xthe selection principle of control technology: " selection of coal-burning power plant's nitrogen oxide control technology should suit measures to local conditions, because of coal suiting measures to different conditions, because of stove suiting measures to different conditions, according to technical maturation, viable economically and convenient operation, determine; The one preferred technique that low nitrogen burning technology should be controlled as coal-burning power plant's nitrogen oxide; After adopting low nitrogen burning technology, when the not up to standard or discontented Football Association amount of discharged nitrous oxides concentration requires, should build denitrating flue gas facility.”
Low nitrogen burning+SNCR denitration technology route not only meets the requirement of Chinese Ministry of Environmental Protection's technical policy, be also in current various denitration technology combination, invest operating cost economize most, transform the duration the shortest, the existing combustion system of boiler is changed to minimum scheme; What is more important, this process route and capital equipment have a large amount of reliable achievements at home on CFBB, can meet safe and reliable, system optimization, telotism completely, do not reduce boiler efficiency and not affect the requirement of the normal operation of boiler.Yet the CFBB of available technology adopting is with SNCR denitrification apparatus, mostly energy consumption is high, and efficiency is low, fluctuation of service, and in spraying system, the injector method of operation is single, can not meet denitration needs.
Utility model content
For above deficiency, the utility model provides a kind of CFBB SNCR denitrification apparatus.
The technical solution of the utility model: a kind of CFBB SNCR denitrification apparatus, comprise ammoniacal liquor stocking system, ammonia concn adjustment System, distribution and computation device and spraying system four parts, in wherein said ammoniacal liquor stocking system, ammoniacal liquor receives the arrival end that pump is connected on tank used for storing ammonia, the port of export of tank used for storing ammonia is connected with an arrival end of static mixer through ammonia water spray pump, another arrival end of static mixer is connected with ammonia concn adjustment System, in ammonia concn adjustment System, adopt dilution water tank and dilution water pump, the port of export of described static mixer is connected respectively with some roads distribution and computation device, a spraying system of the corresponding connection of each road distribution and computation device, between static mixer and distribution and computation device, be provided with the air compression station that is used to spraying system that atomizing air is provided.
On the ammonia spirit pipeline of drawing from ammonia water spray pump, be respectively equipped with back pressure control loop with the dilution water pipeline drawing from dilution water pump, it is for being adjusted to the ammonia spirit of each stove and the regime flow of dilution water and pressure, to guarantee denitration effect.
Described distribution and computation device comprises several flowmeters and operated pneumatic valve.This part connects and responds the control signal from unit, automatically regulates reactant flow, and the variation of NOx level, boiler load, fuel or combustion system is made to response, opens or closes inlet zone or controls its mass flow.
In described spraying system, each jetted layers is respectively equipped with flow control valve and flowmeter, on each injector, be furnished with respectively electronic or pneumatic booster, electronic or pneumatic booster and SNCR control system are carried out signal transmission, and the injector of realizing whole SNCR system moves automatically.
The beneficial effects of the utility model: this device has up to more than 50% denitration efficiency on CFBB, has the features such as cost of investment and operating cost are lower, system is simple, the engineering time is short simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, a kind of CFBB SNCR denitrification apparatus, comprise ammoniacal liquor stocking system, ammonia concn adjustment System, distribution and computation device and spraying system four parts, in wherein said ammoniacal liquor stocking system, ammoniacal liquor receives the arrival end that pump 1 is connected on tank used for storing ammonia 2, the port of export of tank used for storing ammonia 2 is connected with an arrival end of static mixer 5 through ammonia water spray pump 3, another arrival end of static mixer 5 is connected with ammonia concn adjustment System, in ammonia concn adjustment System, adopt dilution water tank 9 and dilution water pump 4, the port of export of described static mixer 5 is connected respectively with some roads distribution and computation device 7, a spraying system 8 of each road distribution and computation device 7 corresponding connection, between static mixer 5 and distribution and computation device 7, be provided with the air compression station 10 that is used to spraying system 8 that atomizing air is provided.On the ammonia spirit pipeline of drawing from ammonia water spray pump 3, be respectively equipped with back pressure control loop 6 with the dilution water pipeline drawing from dilution water pump 4.Described distribution and computation device 7 comprises several flowmeters and operated pneumatic valve.In described spraying system 8, each jetted layers is respectively equipped with flow control valve and flowmeter, is furnished with respectively electronic or pneumatic booster on each injector, and electronic or pneumatic booster and SNCR control system are carried out signal transmission.
During use, by ammoniacal liquor tank car, be transported to the 17%-23% ammoniacal liquor in factory, with ammoniacal liquor, receive pump 1 and be transported to the interior storage of tank used for storing ammonia 2.The ammonia spirit of certain concentration by after the output of ammonia water spray pump, enters static mixer 5 and adds dilution water from tank used for storing ammonia 2, by monitoring dilution water flow and ammonia spirit flow, regulates final ammonia concn to meet the requirement of boiler different load.Dilution water is carried static mixers 5 to arrive by dilution water pump 4 and is realized ammonia concn adjustment from dilution water tank 9, guarantees that when operating condition changes in nozzle, fluid flow is substantially constant.。
By back pressure control loop 6, regulate the ammonia spirit of each stove and the regime flow of dilution water and pressure, to guarantee denitration effect.Back pressure is controlled and is realized by pneumatic flowrate control valve.
By distribution and computation device 7, automatically regulate reactant flow, the variation of NOx level, boiler load, fuel or combustion system is made to response, open or close inlet zone or control its mass flow.
By spraying system 8, the online good ammonia spirit of prepared and diluted is ejected in the entrance or outlet of cyclone separator of circulating fluidized bed boiler.Whether each jetted layers is provided with total valve and controls this jetted layers and put into operation, and the jetted layers putting into operation is driven and advanced by electric/pneumatic propulsion plant.Each jetted layers is provided with flow control valve and flow measurement equipment.The required atomizing medium of lance ejection adopts compressed air.The atomization pneumatic manifold of each jetted layers is provided with pressure adjusting, pressure measxurement, flow measurement, then leads to each injector.Every injector is all furnished with electric/pneumatic propeller, realizes the action that automatically advances and release SNCR injector.Angle of rake position signalling is received in SNCR control system, and with the valve event interlock of opening/stopping compressed air and opening/stopping ammonia spirit, the injector of realizing whole SNCR system moves automatically.
Claims (4)
1. a CFBB SNCR denitrification apparatus, it is characterized in that: comprise ammoniacal liquor stocking system, ammonia concn adjustment System, distribution and computation device and spraying system four parts, in wherein said ammoniacal liquor stocking system, ammoniacal liquor receives the arrival end that pump (1) is connected on tank used for storing ammonia (2), the port of export of tank used for storing ammonia (2) is connected with an arrival end of static mixer (5) through ammonia water spray pump (3), another arrival end of static mixer (5) is connected with ammonia concn adjustment System, in ammonia concn adjustment System, adopt dilution water tank (9) and dilution water pump (4), the port of export of described static mixer (5) is connected respectively with some road distribution and computation devices (7), the corresponding spraying system (8) that connects of each road distribution and computation device (7), between static mixer (5) and distribution and computation device (7), be provided with the air compression station (10) that is used to spraying system (8) that atomizing air is provided.
2. a kind of CFBB SNCR denitrification apparatus as claimed in claim 1, is characterized in that: on the ammonia spirit pipeline of drawing from ammonia water spray pump (3), be respectively equipped with back pressure control loop (6) with the dilution water pipeline drawing from dilution water pump (4).
3. a kind of CFBB SNCR denitrification apparatus as claimed in claim 1, is characterized in that: described distribution and computation device (7) comprises several flowmeters and operated pneumatic valve.
4. a kind of CFBB SNCR denitrification apparatus as claimed in claim 1, it is characterized in that: in described spraying system (8), each jetted layers is respectively equipped with flow control valve and flowmeter, on each injector, be furnished with respectively electronic or pneumatic booster, electronic or pneumatic booster and SNCR control system are carried out signal transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320527399.XU CN203447976U (en) | 2013-08-28 | 2013-08-28 | SNCR (selective non-catalytic reduction) denitration device for circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320527399.XU CN203447976U (en) | 2013-08-28 | 2013-08-28 | SNCR (selective non-catalytic reduction) denitration device for circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203447976U true CN203447976U (en) | 2014-02-26 |
Family
ID=50127881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320527399.XU Expired - Lifetime CN203447976U (en) | 2013-08-28 | 2013-08-28 | SNCR (selective non-catalytic reduction) denitration device for circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203447976U (en) |
Cited By (3)
| 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 |
| CN105642101A (en) * | 2016-01-27 | 2016-06-08 | 西安航天源动力工程有限公司 | Flue gas recirculation and SNCR joint denitration process system |
| CN107185367A (en) * | 2017-06-09 | 2017-09-22 | 青岛艳阳天环保有限公司 | SNCR metered dispensing units and method that concentration based on ammonia is quantitatively coupled |
-
2013
- 2013-08-28 CN CN201320527399.XU patent/CN203447976U/en not_active Expired - Lifetime
Cited By (3)
| 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 |
| CN105642101A (en) * | 2016-01-27 | 2016-06-08 | 西安航天源动力工程有限公司 | Flue gas recirculation and SNCR joint denitration process system |
| CN107185367A (en) * | 2017-06-09 | 2017-09-22 | 青岛艳阳天环保有限公司 | SNCR metered dispensing units and method that concentration based on ammonia is quantitatively coupled |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106621804B (en) | Flue gas ammonia injection mixing device and SCR flue gas denitration system | |
| CN202700347U (en) | Smoke selective non-catalytic reduction (SNCR) denitration complete plant | |
| CN101963084B (en) | Selective catalytic reduction urea air premixing jet system | |
| CN208330496U (en) | A kind of Test Rig SCR denitration equipment | |
| CN103638805B (en) | A kind of CFB boiler SNCR denitration method for flue gas of dual reducting agents | |
| CN203447976U (en) | SNCR (selective non-catalytic reduction) denitration device for circulating fluidized bed boiler | |
| CN107008144B (en) | Device for realizing SCR flue gas denitration multistage ammonia spraying and flue gas denitration method | |
| CN204352751U (en) | The SNCR denitration device of the compatible ammoniacal liquor of a kind of urea | |
| CN203737102U (en) | Distribution and injection module and system for SNCR (Selective Non Catalytic Reduction) flue gas denitrification system | |
| CN205109379U (en) | Sulfur trioxide's desorption system in coal fired power plant flue gas | |
| CN211648282U (en) | SCR urea supply injection system of marine diesel engine | |
| CN205386412U (en) | Boiler flue gas denitration system | |
| CN203316010U (en) | Flue gas denitration system with SCR and SNCR coupled | |
| CN102824841B (en) | Selective non-catalytic reduction (SNCR) denitration system of coal-fired circulating fluidized bed boiler | |
| CN101892888A (en) | Reducing agent filling device for SCR system | |
| CN203549804U (en) | CFB (circulating fluidized bed) boiler combustion optimization and SNCR (selective non-catalytic reduction) denitrification device | |
| CN204543971U (en) | A kind of SNCR denitration device | |
| CN203389534U (en) | Selective catalytic reduction (SCR) flue gas denitrification device | |
| CN101879401A (en) | Reducing agent injection mechanism suitable for SCR reactor | |
| CN204637957U (en) | A kind of equipment for denitrifying flue gas | |
| CN204563920U (en) | A kind of medium small boiler SNCR denitration system | |
| CN203525562U (en) | Selective non-catalytic reduction (SNCR) denitration device | |
| CN207680333U (en) | Urea direct-injection SNCR+SCR flue gas denitrification systems | |
| CN106894866A (en) | A kind of marine diesel NOXThe urea injection system and method for emission reduction device SCR | |
| CN206414956U (en) | A kind of solution conveying device for flue gas denitrification system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |