CN205055813U - Low temperature SCR denitrification facility - Google Patents
Low temperature SCR denitrification facility Download PDFInfo
- Publication number
- CN205055813U CN205055813U CN201520609929.4U CN201520609929U CN205055813U CN 205055813 U CN205055813 U CN 205055813U CN 201520609929 U CN201520609929 U CN 201520609929U CN 205055813 U CN205055813 U CN 205055813U
- Authority
- CN
- China
- Prior art keywords
- scr denitration
- low temperature
- unit
- denitration
- temperature scr
- 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)
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a low temperature SCR ( selective catalytic reduction ) denitrification facility, include processing unit and SCR denitration unit in advance, wherein processing unit is divide into dealkalize room and clean room by grid web in advance. The beneficial effects of the utility model are that: compact structure, simple, convenient operation, the flue gas that produces industrial stoves has increased the preliminary treatment before denitration treatment, detach the impurity such as alkali metal, alkaline earth metal and dust in the flue gas, has improved the activity to the denitration reaction catalyst, has guaranteed denitration efficiency, has saved equipment cost.
Description
Technical field
The utility model relates to a kind of denitrification apparatus, is specifically related to a kind of low-temperature SCR (SCR) denitrification apparatus.Belong to Chemical Engineering Design and manufacture field.
Background technology
Industrial combustion equipment comprises: Industrial Boiler, kiln, sintering machine, cement kiln, glass furnace etc., the tail gas that these equipment produces, and is the one of the main reasons causing environmental pollution.At present, in China's discharged nitrous oxides total amount, the total emission volumn of cement building material industry nitrogen oxide accounts for wherein about 36%, and the total emission volumn of iron and steel metallurgical industry nitrogen oxide accounts for wherein about 30%.Along with the increasing of Environmental pollution management, will be more and more higher to the requirement of Industrial Nitrogen oxide exhaust emissions process.
Reduce discharging field at nitrogen oxide, selective catalytic reduction SCR gas denitrifying technology be apply in the world at most, the most ripe and a kind of gas denitrifying technology that denitration efficiency is the highest.Its core is under the effect of catalyst, with ammonia at a certain temperature to the restoring function of NOx, the NOx in flue gas is reduced to N
2and water.
Its afterbody discharged gas fume temperature of Industrial Boiler in Thermal Power Generation Industry, industrial combustion equipment, kiln can reach 320-400 DEG C, and flue gas characteristic is good, and conventional middle high temperature modification SCR denitration equipment can be adopted to process.And in the industry such as cement building material, Ferrous Metallurgy, many kilns not only its afterbody discharged gas fume temperature, at 200-250 DEG C, do not reach reaction temperature requirement, and flue gas characteristic is complicated, directly can not carry out denitration, this just needs configuration low form SCR technique just can effectively process.
Utility model content
The purpose of this utility model is: for overcoming the deficiencies in the prior art, provides the low temperature SCR denitration device of a kind of compact conformation, low cost, low energy consumption.
The purpose of this utility model is achieved through the following technical solutions: a kind of low temperature SCR denitration device, comprises pretreatment unit and SCR denitration unit composition.Pretreatment unit is through being divided into upper and lower two parts, and wherein Lower Half is depickling room, and the first half is dirt pocket, and grille strip is as line of demarcation.Screen pack is provided with in the middle of pretreatment unit and SCR denitration unit.SCR denitration unit is positioned at separately a container, arranges horizontal baffle in container, wherein horizontal baffle is furnished with graticule mesh.
Denitration is realized by such technological approaches: flue gas enters the Lower Half dealkalize room 3 being positioned at pretreatment unit 1 by smoke inlet 9, remove alkalies and alkaline earth, flue gas enters dirt pocket 4 through grille strip 7, then enters SCR denitration unit 2 through filter screen 8, simultaneously, denitrification reducing agent ammonia enters SCR denitration unit 2 through ammonia entrance 11, fully mix with flue gas, under low temperature catalyst effect, successively through graticule mesh 5 and horizontal baffle 6, denitration reaction occurs, and its chemical reaction is as follows:
Main reaction
4NO+4NH
3+O
2→4N
2+6H
2O
2NO2+4NH
3+O
2→3N
2+6H
2O
Side reaction
2SO
2+2O
2→2SO
3
NH3+SO
3+H
2O→NH
4HSO
4
Flue gas after denitration process enters flue through exhanst gas outlet 10, is finally delivered to chimney, is discharged in air.
Adopt above technical scheme, the utility model has following beneficial effect:
1, apparatus structure is compact, simple, easy to operate.
2, before denitrating flue gas, flue gas is carried out to the pretreatment such as dealkalize metal, solod metal, dedusting, reduce the impact of flue gas impurity on catalyst poisoning, improve the activity of catalyst, ensure that denitration efficiency, save equipment cost.
3, flue gas carries out denitration reaction under the lower temperature conditions of 150 DEG C-220 DEG C, and reduce energy consumption of reaction, nitrogen oxide removal efficiency reaches 80% ~ 50%.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Reference numeral: 1-pretreatment unit, 2-SCR denitration unit, 3-dealkalize room, 4-dirt pocket, 5-graticule mesh, 6-horizontal baffle, 7-grille strip, 8-screen pack, 9-gas approach, 10-exhanst gas outlet, 11-ammonia entrance.
Detailed description of the invention
Below in conjunction with detailed description of the invention and Figure of description, the utility model is described in further detail.
Embodiment:
A kind of low temperature SCR denitration device, comprises pretreatment unit 1 and SCR denitration unit 2 forms.Pretreatment unit 1 is through being divided into upper and lower two parts, and wherein Lower Half is dealkalize room 3, and the first half is dirt pocket 4, and grille strip 7 is as line of demarcation.Steel mill's flue gas enters the Lower Half dealkalize room 3 being positioned at pretreatment unit 1 by smoke inlet 9, remove alkalies and alkaline earth, flue gas enters dirt pocket 4 through grille strip 7, then enters SCR denitration unit 2 through filter screen 8, simultaneously, denitrification reducing agent ammonia, with the volume fraction of 20%-25%, enters SCR denitration unit 2 through ammonia entrance 11, fully mixes with flue gas, under 150-220 DEG C of low-temperature catalyzed condition, successively through graticule mesh 5 and horizontal baffle 6, denitration reaction occurs, and its chemical reaction is as follows:
Main reaction
4NO+4NH
3+O
2→4N
2+6H
2O
2NO2+4NH
3+O
2→3N
2+6H
2O
Side reaction
2SO
2+2O
2→2SO
3
NH3+SO
3+H
2O→NH
4HSO
4
Flue gas after denitration process enters flue through exhanst gas outlet 10, is finally delivered to chimney, and be discharged in air, nitrogen oxide removal efficiency reaches 78%.
Claims (5)
1. a low temperature SCR denitration device, comprise pretreatment unit (1) and SCR denitration unit (2), it is characterized in that: pretreatment unit (1) is divided into upper and lower two parts through grille strip (7), wherein Lower Half is dealkalize room (3), the first half is dirt pocket (4), and grille strip (7) is as line of demarcation.
2. a kind of low temperature SCR denitration device according to claim 1, is characterized in that: be provided with screen pack (8) in the middle of pretreatment unit (1) and SCR denitration unit (2).
3. a kind of low temperature SCR denitration device according to claim 1, it is characterized in that: SCR denitration unit (2) is positioned at separately a container, horizontal baffle (6) is set in container, wherein horizontal baffle (6) is furnished with graticule mesh (5).
4. a kind of low temperature SCR denitration device according to claim 1, is characterized in that: SCR denitration unit (2) is provided with an ammonia entrance (11).
5. a kind of low temperature SCR denitration device according to claim 1, can be applicable to middle-size and small-size iron and steel metallurgical industry, cement and glass manufacture industry tail gas denitration process engineering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520609929.4U CN205055813U (en) | 2015-08-14 | 2015-08-14 | Low temperature SCR denitrification facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520609929.4U CN205055813U (en) | 2015-08-14 | 2015-08-14 | Low temperature SCR denitrification facility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205055813U true CN205055813U (en) | 2016-03-02 |
Family
ID=55382417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520609929.4U Expired - Fee Related CN205055813U (en) | 2015-08-14 | 2015-08-14 | Low temperature SCR denitrification facility |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205055813U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106334423A (en) * | 2016-08-26 | 2017-01-18 | 成都国化环保科技有限公司 | Low temperature denitration process based on activated carbon material |
| CN106731565A (en) * | 2016-11-23 | 2017-05-31 | 无锡市国松环保机械有限公司 | Novel SCR low-temperature denitration device |
| WO2018218920A1 (en) * | 2017-05-27 | 2018-12-06 | 盐城市兰丰环境工程科技有限公司 | Dust remover capable of desulfuration and denitration |
| CN109157926A (en) * | 2018-10-26 | 2019-01-08 | 安徽工业大学 | A kind of device of layering removing sintering flue gas pollutant |
| CN109316954A (en) * | 2018-10-26 | 2019-02-12 | 安徽工业大学 | A method of utilizing multilayer catalytic degradation sintering flue gas pollutant |
-
2015
- 2015-08-14 CN CN201520609929.4U patent/CN205055813U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106334423A (en) * | 2016-08-26 | 2017-01-18 | 成都国化环保科技有限公司 | Low temperature denitration process based on activated carbon material |
| CN106731565A (en) * | 2016-11-23 | 2017-05-31 | 无锡市国松环保机械有限公司 | Novel SCR low-temperature denitration device |
| WO2018218920A1 (en) * | 2017-05-27 | 2018-12-06 | 盐城市兰丰环境工程科技有限公司 | Dust remover capable of desulfuration and denitration |
| CN109157926A (en) * | 2018-10-26 | 2019-01-08 | 安徽工业大学 | A kind of device of layering removing sintering flue gas pollutant |
| CN109316954A (en) * | 2018-10-26 | 2019-02-12 | 安徽工业大学 | A method of utilizing multilayer catalytic degradation sintering flue gas pollutant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205055813U (en) | Low temperature SCR denitrification facility | |
| CN109794146B (en) | Grate-rotary kiln SNCR/SCR denitration and active coke desulfurization combined system and process | |
| CN102936651B (en) | A kind of method sintering simultaneous SO_2 and NO removal system and desulphurization denitration thereof | |
| CN204555717U (en) | Warm flue gas SCR denitration device in a kind of cement kiln end | |
| CN104888591A (en) | Boiler flue gas denitration purification system and boiler flue gas denitration purification method | |
| CN103785290A (en) | Sintering and pelletizing flue gas desulfurization and denitrification coordinating management system and process | |
| CN103406006A (en) | SCR (Selective Catalytic Reduction) denitration device for NOx control of rotary cement kiln | |
| CN104324575B (en) | A kind of system of spray absorber formula sintering flue gas and desulfurizing and denitrifying | |
| CN103433033A (en) | Low-temperature denitration catalyst MnOx-CeO2-TiO2-Al2O3, and preparation method and application thereof | |
| CN104548931A (en) | Device for producing ammonia gas through pyrolysis of urea by using high-temperature flue gas as heat source | |
| CN203494378U (en) | SCR (Selective Catalytic Reduction) denitration device for controlling NOx of rotary cement kiln | |
| CN204619708U (en) | A kind of cement rotary kiln kiln gas combined denitration device | |
| CN103157356A (en) | Sintering denitrification system and nitrogen oxide removal method thereof | |
| CN204724003U (en) | The cleaning system of denitration of boiler smoke | |
| CN102188889B (en) | Device and method for combined removal of sulphur dioxide (SO2), nitrogen oxide (NOX) and mercury from fume | |
| CN202410497U (en) | Flue gas denitration device of cement kiln | |
| CN105561769A (en) | Denitration device achieving denitration by using salt reinforcing hydrogen peroxide solution to oxidize NO and denitration method | |
| CN212492330U (en) | Active coke combined desulfurization and denitrification system based on pre-oxidation | |
| CN201832542U (en) | Selective flue gas desulfuration and denitration apparatus for sintering machines | |
| CN210097394U (en) | Be used for cement kiln tail flue gas dust nitrogen oxide desorption system in coordination | |
| CN206535421U (en) | A kind of waste incinerator two-part flue gas purification system | |
| CN103170229A (en) | Desulfurization and denitration integrated system of industrial kiln stove | |
| CN201754034U (en) | Comprehensive treatment system for glass furnace flue gas | |
| CN206660927U (en) | A kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus | |
| CN202860383U (en) | SCR flue gas denitrating device for garbage incinerator |
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: 20160302 Termination date: 20190814 |