CN202921160U - SNCR (selective non-catalytic reduction) flue gas denitration system - Google Patents
SNCR (selective non-catalytic reduction) flue gas denitration system Download PDFInfo
- Publication number
- CN202921160U CN202921160U CN 201220630798 CN201220630798U CN202921160U CN 202921160 U CN202921160 U CN 202921160U CN 201220630798 CN201220630798 CN 201220630798 CN 201220630798 U CN201220630798 U CN 201220630798U CN 202921160 U CN202921160 U CN 202921160U
- Authority
- CN
- China
- Prior art keywords
- control system
- ammonia
- deionized water
- storage tank
- 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
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model relates to an SNCR (selective non-catalytic reduction) flue gas denitration system. The system comprises an ammonia storage tank, a deionized water storage tank, a compressed air storage tank, a distribution control system, an atomization spray system and an NOx online monitor system, wherein the ammonia storage tank is connected with the distribution control system, and is provided with a stir motor; the deionized water storage tank is connected to the distribution control system through a deionized water pressurization control system; the distribution control system and the atomization spray system are sequentially connected; the compressed air storage tank is connected to the atomization spray system through the compressed air control system; and the NOx online monitor system is connected with the distribution control system. According to the SNCR flue gas denitration system, ammonia and deionized water are mixed, the flow rate of the ammonia is regulated in real time and sprayed through atomization, so that the efficiency of removing NOx can be improved, escape of NH3 can be minimized, the ammonia utilization can be improved, and the cost can be reduced.
Description
[technical field]
The utility model relates to a kind of flue gas denitrification system, is specifically related to a kind of SNCR flue gas denitrification system, belongs to the denitrification equipment technical field.
[background technology]
At present, cement kiln NOx control technology mainly comprises low NO, fractional combustion method, non-selective catalytic reduction (SNCR) and selective catalytic reduction (SCR) etc.
Low-NOx combustor is widely used at present at home, but that its effect is affected by firer's condition is larger, and the discharge capacity of General N Ox can not produce a desired effect or DeGrain.The SCR method has the high advantage of nitric efficiency, is widely used in the boiler of power plant denitrogenation.But due to the specific (special) requirements of SCR operating temperature window and dustiness, at home and abroad seldom use on cement producing line.
And the SNCR method has been used more than 20 year in European cement industry, effect is better, its groundwork principle is: ammoniacal liquor (mass concentration 20%～25%) or urea liquid (mass concentration 30% ~ 50%) are directly sprayed into dore furnace suitable temperature zone (850 ~ 1050 ℃), ammonia and NOx(NO, NO
2In mixture) carry out the SNCR reaction, NOx is changed into free of contamination N
2The chemical reaction that occurs in stove after spray ammonia has:
4NO+4NH
3+O
2→4N
2+6H
2O
6NO+4NH
3→5N
2+6H
2O
6NO
2+8NH
3→7N
2+12H
2O
2NO
2+4NH
3?+O
2→?3N
2+6H
2O。
Yet when reaction zone temperature was too low, reaction efficiency can reduce; When reaction zone temperature was too high, ammonia can directly be oxidized to N
2And NO.
Therefore, for avoiding above-mentioned technical problem, necessaryly provide a kind of novel SNCR flue gas denitrification system, to overcome described defective of the prior art.
[utility model content]
For addressing the above problem, the purpose of this utility model is to provide a kind for the treatment of effeciency high, and ammonia is fugacity and the safe SNCR flue gas denitrification system of use not.
For achieving the above object, the technical scheme that the utility model is taked is: a kind of SNCR flue gas denitrification system, and it comprises tank used for storing ammonia, deionized water storage tank, compressed air reservoir, distribution control system, atomisation system and NOx on-line monitoring system; Wherein, described tank used for storing ammonia is connected to the distribution control system, and it is with stirring motor; Described deionized water storage tank is connected to the distribution control system by a deionized water pressurizing control system; Described distribution control system is connected with the atomisation system and is connected; Described compressed air reservoir is connected to the atomisation system by a compressed air control system; Described NOx on-line monitoring system be connected control system to connect.
SNCR flue gas denitrification system of the present utility model further is set to: be connected with one on described tank used for storing ammonia and unload ammonia system, be provided with online measurement of concetration meter in unloading ammonia system.
SNCR flue gas denitrification system of the present utility model also is set to: be connected with deionized water equipment on described deionized water storage tank.
Compared with prior art, the utlity model has following beneficial effect: SNCR flue gas denitrification system of the present utility model mixes ammoniacal liquor and deionization, and adjusts in real time the ammoniacal liquor flow and by atomisation, take off the efficient of NOx and make NH thereby improve
3Escape minimize, improved the utilization rate of ammonia, reduced cost.
[description of drawings]
Fig. 1 is the schematic diagram of SNCR flue gas denitrification system of the present utility model.
[specific embodiment]
See also shown in Figure of description 1, the utility model is a kind of SNCR flue gas denitrification system, the NOx that it produces for the treatment of cement kiln dore furnace 8, it mainly is comprised of tank used for storing ammonia 1, deionized water storage tank 2, compressed air reservoir 3, several parts such as distribution control system 5, atomisation system 6 and NOx on-line monitoring system 7.
Wherein, described tank used for storing ammonia 1 is connected with one and unloads ammonia system 9 with stirring motor 10 on it, be provided with online measurement of concetration meter 14 in unloading ammonia system 9.After outsourcing ammoniacal liquor is transported to plant area, unloads ammonia system 9 by this ammoniacal liquor in groove tank car is delivered to tank used for storing ammonia 1.This tank used for storing ammonia 1 connects and distributes control system 5.
Be connected with a deionized water equipment 11 on described deionized water storage tank 2, the deionized water for preparing by deionized water equipment 11 is stored in deionized water storage tank 2.This deionized water storage tank 2 is connected to by a deionized water pressurizing control system 12 and distributes control system 5.
Described compressed air reservoir 3 is connected to atomisation system 6 by a compressed air control system 13, and compressed air can make ammonia atomization.Described distribution control system 5 is connected with the atomisation system and is connected successively.Described NOx on-line monitoring system 7 is used for the NOx concentration of Real Time Monitoring cement kiln dore furnace 8, itself and be connected control system 5 connections.
Because the outsourcing ammonia concn is relatively high, in order to increase the utilization ratio of ammoniacal liquor, need to be watered dilution, ammoniacal liquor and deionized water are entered by two independent pipelines respectively distributes control system 5.Described distribution control system 5 is controlled the weak aqua ammonia assignment of traffic automatically according to the needs of weak aqua ammonia.Described atomisation system 6 is whole SNCR(spray ammonia) critical component of system, by NOx on-line monitoring system 7 monitoring cement kiln dore furnace 8 outlet (or chimney breast) NOx discharge values, feed back to and distribute control system 5, thereby regulation and control ammonia water spray amount, guaranteeing to reduce system operation cost under the nitric efficiency prerequisite automatically; Atomisation system 6 can adapt to the flow of different weak aqua ammonias, also can keep good atomizing effect when the changes in flow rate amplitude is larger.
The above specific embodiment is only the preferred embodiment of this creation, not in order to limiting this creation, all in this creation spirit and principle within make any modification, be equal to replacement, improvement etc., within all should being included in the protection domain of this creation.
Claims (3)
1. a SNCR flue gas denitrification system, is characterized in that: comprise tank used for storing ammonia, deionized water storage tank, compressed air reservoir, distribution control system, atomisation system and NOx on-line monitoring system; Wherein, described tank used for storing ammonia is connected to the distribution control system, and it is with stirring motor; Described deionized water storage tank is connected to the distribution control system by a deionized water pressurizing control system; Described distribution control system is connected with the atomisation system and is connected; Described compressed air reservoir is connected to the atomisation system by a compressed air control system; Described NOx on-line monitoring system be connected control system to connect.
2. SNCR flue gas denitrification system as claimed in claim 1, is characterized in that: be connected with one on described tank used for storing ammonia and unload ammonia system, be provided with online measurement of concetration meter in unloading ammonia system.
3. SNCR flue gas denitrification system as claimed in claim 1, is characterized in that: be connected with deionized water equipment on described deionized water storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220630798 CN202921160U (en) | 2012-11-26 | 2012-11-26 | SNCR (selective non-catalytic reduction) flue gas denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220630798 CN202921160U (en) | 2012-11-26 | 2012-11-26 | SNCR (selective non-catalytic reduction) flue gas denitration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202921160U true CN202921160U (en) | 2013-05-08 |
Family
ID=48211154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220630798 Expired - Fee Related CN202921160U (en) | 2012-11-26 | 2012-11-26 | SNCR (selective non-catalytic reduction) flue gas denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202921160U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103977705A (en) * | 2014-04-23 | 2014-08-13 | 浙江省环境保护科学设计研究院 | Reducing agent metering for cement clinker production line SNCR flue gas denitration and control system and method thereof |
| CN104707467A (en) * | 2015-03-20 | 2015-06-17 | 南通康海机床有限公司 | SNCR (selective non-catalytic reduction) denitration system for cement kiln |
| CN105169919A (en) * | 2015-10-09 | 2015-12-23 | 索通发展股份有限公司 | Flue gas denitration device for carbon pot calciner and denitration technology of flue gas denitration device |
| CN106362560A (en) * | 2016-10-13 | 2017-02-01 | 镇江金锐环保设备有限公司 | SNCR (selective non-catalytic reduction) denitrification system control unit |
| CN114797435A (en) * | 2022-05-17 | 2022-07-29 | 合肥中亚环保科技有限公司 | SNCR (selective non-catalytic reduction) denitration system for circulating fluidized bed boiler |
-
2012
- 2012-11-26 CN CN 201220630798 patent/CN202921160U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103977705A (en) * | 2014-04-23 | 2014-08-13 | 浙江省环境保护科学设计研究院 | Reducing agent metering for cement clinker production line SNCR flue gas denitration and control system and method thereof |
| CN104707467A (en) * | 2015-03-20 | 2015-06-17 | 南通康海机床有限公司 | SNCR (selective non-catalytic reduction) denitration system for cement kiln |
| CN105169919A (en) * | 2015-10-09 | 2015-12-23 | 索通发展股份有限公司 | Flue gas denitration device for carbon pot calciner and denitration technology of flue gas denitration device |
| CN106362560A (en) * | 2016-10-13 | 2017-02-01 | 镇江金锐环保设备有限公司 | SNCR (selective non-catalytic reduction) denitrification system control unit |
| CN114797435A (en) * | 2022-05-17 | 2022-07-29 | 合肥中亚环保科技有限公司 | SNCR (selective non-catalytic reduction) denitration system for circulating fluidized bed boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103691293B (en) | A kind of SNCR and SCR mixing denitrating system | |
| CN202921160U (en) | SNCR (selective non-catalytic reduction) flue gas denitration system | |
| CN204017667U (en) | A kind of Novel SCR denitrating system | |
| CN202700347U (en) | Smoke selective non-catalytic reduction (SNCR) denitration complete plant | |
| CN203971726U (en) | SNCR equipment for denitrifying flue gas | |
| CN203899439U (en) | Novel SNCR (selective non-catalytic reduction) denitration system | |
| CN107789967B (en) | Sintering flue gas low-temperature denitration device and implementation method thereof | |
| CN203342646U (en) | Fluidized bed boiler flue gas denitrating device adopting urea hydrolysis SNCR (selective non-catalytic reduction) | |
| CN204637957U (en) | A kind of equipment for denitrifying flue gas | |
| CN104785092A (en) | An SNCR flue gas denitration device | |
| CN203525562U (en) | Selective non-catalytic reduction (SNCR) denitration device | |
| CN204933244U (en) | NOx removal device in coal-burning power plant's coal-powder boiler flue gas | |
| CN204933256U (en) | A kind of heavy oil power-plant flue gas denitrating system | |
| CN103170229A (en) | Desulfurization and denitration integrated system of industrial kiln stove | |
| CN205461737U (en) | Non - catalytic reduction method deNOx systems of two reductant selectivity | |
| CN204261561U (en) | Coal steam-electric plant smoke SCR denitration system | |
| CN105797549A (en) | Single-fluid automated waste gas treatment method | |
| CN102698600A (en) | System for intelligently controlling flue gas denitrification of cement plant based on selective catalytic reduction (SCR) method | |
| CN103301737A (en) | Urea hydrolyzed SNCR (selective non-catalytic reduction) flue gas denitrification device for fluidized bed boiler | |
| CN204911211U (en) | Measurement distribution module | |
| CN203264548U (en) | Industrial kiln desulfurization denitrification integrated system | |
| CN204973512U (en) | Improved generation SNCR+ ozone flue gas denitration device | |
| CN212651632U (en) | Flue gas denitration system for diluting ammonia gas by desulfurized flue gas | |
| CN208720184U (en) | A kind of waste heat boiler of nitrogen oxides minimum discharge | |
| CN202122907U (en) | Secondary-combination flue gas denitration device of oil burning boiler |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20161126 |