CN202157848U - SCR (Selective Catalytic Reduction) catalytic converter - Google Patents
SCR (Selective Catalytic Reduction) catalytic converter Download PDFInfo
- Publication number
- CN202157848U CN202157848U CN201120221839XU CN201120221839U CN202157848U CN 202157848 U CN202157848 U CN 202157848U CN 201120221839X U CN201120221839X U CN 201120221839XU CN 201120221839 U CN201120221839 U CN 201120221839U CN 202157848 U CN202157848 U CN 202157848U
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- CN
- China
- Prior art keywords
- right baffle
- catalytic converter
- housing
- lumen
- communicated
- 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.)
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Abstract
An SCR (Selective Catalytic Reduction) catalytic converter comprises a shell, a left baffle, a right baffle, a gas inlet pipe, a gas outlet pipe and a carrier component; the left baffle and the right barrel are arranged in the shell at interval and divide the inner chamber of the shell into a left buffering chamber, a middle chamber and a right buffering chamber; the left baffle separates the middle chamber from the left buffering chamber, and the right baffle is provided with a plurality of through holes to cause the right buffering chamber to be communicated with the middle chamber; the gas inlet pipe is vertically inserted into the shell from the left side of the shell and is communicated with the left buffering chamber; the gas outlet pipe is horizontally inserted into the shell from the right side of the shell and extends into the middle chamber by penetrating through the right baffle to be communicated with the middle chamber; and the carrier component is arranged between the left baffle and the right baffle and is communicated with the left and right buffering chambers. The SCR catalytic converter has the advantages of being good in flowing property and moderate in loss of pressure, and has the noise elimination function.
Description
Technical field
The utility model relates to a kind of diesel engine vent gas processing equipment, particularly a kind of SCR catalytic converter.
Background technique
Diesel engine is having remarkable advantages than petrol engine aspect power character, Economy and the reliability, particularly CO
2Discharge very lowly, its purposes expands on all kinds of vehicles gradually.But it is that nitrogen oxide and particulate emission are serious that there is maximum problem in diesel engine.Along with Chinese emission control regulations are more and more tighter, and homemade DENG performance and oil product problem, depend the emission controls by improving combustion measure alone and seem unable to do what one wishes, therefore be necessary to take the outer after-treatment system of machine to reach emissions object.
The SCR technology is the outer post-processing technology of a kind of machine of vehicle diesel engine, can effectively improve the discharging of diesel engine nitrogen oxide, and insensitive to the diesel oil sulphur content.This technology is through spraying into certain density urea liquid in outlet pipe; Reduction reaction (reaction 3-5) takes place in ammonia that after pyrolysis (reaction 1) and hydrolysis (reaction 2), produces and nitrogen oxide in catalytic converter, be water vapour and nitrogen (reaction 3-5 needs could effectively carry out at a certain temperature) with conversion of nitrogen oxides.
(NH
2)
2CO→NH
3+HNCO (1)
NH
3+HNCO→NH
3+CO
2 (2)
4NO+4NH
3+O
2→4N
2+6H
2O (3)
2NH
3+NO+NO
2→2N
2+3H
2O (4)
6NO
2+8NH
3→7N
2+12H
2O (5)
For the main performance of SCR catalytic converter, can assess by following index.
1, the distribution of fluid between each carrier and the flow uniformity value of each carrier front-end face
Improve the mass flow distribution of waste gas between each carrier, help improving the utilization ratio of carried catalyst; Help reducing the pressure loss of air-flow on carrier; Help carrier and reach initiation temperature faster.
2, the pressure loss of system
The pressure loss of catalytic converter is a part of whole vent systems crushing, and the pressure loss that reduces catalytic converter helps reducing the back pressure of vent systems, thereby helps improving the performance of motor.
3, air speed
The size of air speed has been reacted the waiting time of air-flow in carrier.Air speed is more little, and the waiting time of air-flow in carrier is long more, helps reducing the reduction reaction of nitrogen oxide more.
4, acoustic insertion loss.
The model utility content
The purpose of the utility model is to provide a kind of good flowing properties, the moderate SCR catalytic converter of crushing.
The purpose of the utility model is achieved in that a kind of SCR catalytic converter, comprises housing, right baffle-plate, right baffle plate, gas inlet pipe, gas outlet tube and carrier module; Right baffle-plate and right baffle interval are arranged in the housing and with the housing inner chamber and are separated into left buffer cavity, lumen and right buffer cavity, and right baffle-plate is wherein separated lumen and left buffer cavity, and right baffle plate is provided with a plurality of perforation makes right buffer cavity be communicated with lumen; Gas inlet pipe is inserted in the housing from the left vertical of housing and is communicated with left buffer cavity; Gas outlet tube inserts in the housing and passes right baffle plate and stretch in the lumen and be communicated with lumen from the right side level of housing, and carrier module is arranged between right baffle-plate and the right baffle plate and with left and right buffer cavity and is communicated with.
Described carrier module is totally two groups of series connection, and every group of carrier module comprises a cylindrical ceramic carrier, and this carrier is provided with many parallel channels vertically and connects both ends of the surface, and the internal surface of each passage is respectively equipped with catalyst coat.
Described catalyzer is that zeolite based catalysts or scherbinaite are catalyst based.
Described gas outlet tube is provided with a plurality of radial perforations being positioned on the tube wall of lumen.
Described carrier module also comprises and is coated on the outer liner of carrier, is coated on the outer thermal-protective material of liner and is coated on the outer housing of thermal-protective material.
Described thermal-protective material is a glass felt.
The lower end mouth of pipe face of described gas inlet pipe is positioned at the top of carrier module medial axis.
The SCR catalytic converter of the utility model shows that it has good flowing properties, moderate advantage and the characteristics of crushing, and has the effect of silencing apparatus through computational fluid mechanics (CFD) flow analysis and acoustic analysis demonstration.The design of left and right sides buffer cavity, the right baffle plate of perforation and perforation gas outlet tube can guarantee that air-flow pressure loss when flowing through catalytic converter is moderate; Housing in the carrier module and liner can be protected and holding carrier, prevent carrier broken inefficacy in vehicle driving; The right baffle plate of boring a hole designs with the perforation gas outlet tube, also makes catalytic converter have the noise elimination effect of silencing apparatus.
Description of drawings
Fig. 1 is the overall structure schematic representation of the utility model SCR catalytic converter;
Fig. 2 is the structural representation of the carrier module in the utility model.
Embodiment
Referring to Fig. 1, the SCR catalytic converter of the utility model comprises housing 1, right baffle-plate 2, right baffle plate 3, gas inlet pipe 4, gas outlet tube 5 and carrier module 6.Right baffle-plate 2 and right baffle plate 3 are arranged at interval in the housing 1 and the spatial in the housing are divided into left buffer cavity 7, lumen 8 and right buffer cavity 9; The perforation that right baffle plate 3 wherein is provided with some is communicated with right buffer cavity 7 with lumen 8; Right baffle-plate 2 is separated lumen 8 and right buffer cavity 9, before can preventing to handle with handle after exhaust gang up each other.Gas inlet pipe 4 is inserted in the housing from the left vertical of housing 1 and is communicated with left buffer cavity 7; Gas outlet tube 5 inserts in the housing and passes right baffle plate 3 from the right side level of housing 1 and is communicated with lumen 8.Carrier module is arranged between right baffle-plate 2 and the right baffle plate 3 and is communicated with left and right buffer cavity respectively.
Described carrier module is totally two groups of series connection, and every group of carrier module comprises a cylindrical ceramic carrier, and this carrier is provided with many parallel channels vertically and connects both ends of the surface, and the internal surface of each passage is respectively equipped with catalyst coat.
Referring to Fig. 2; Carrier module 6 in the utility model is totally two groups of series connection; Every group of carrier module comprises a cylindrical ceramic carrier 61; This carrier 61 is provided with many parallel channels 611 vertically and connects both ends of the surface, and the internal surface of each passage is respectively equipped with catalyst coat, and catalyzer is that zeolite based catalysts or scherbinaite are catalyst based.Carrier module 6 also comprises and is coated on the outer liner 62 of carrier 61, is coated on the outer thermal-protective material 63 of liner 62 and is coated on the outer housing 64 of thermal-protective material 63.Thermal-protective material generally adopts glass felt.Housing and liner can be protected and holding carrier, prevent carrier broken inefficacy in vehicle driving.
Gas outlet tube 5 in the utility model is provided with a plurality of radial perforations 51 being positioned on the tube wall of lumen.
The lower end mouth of pipe face of the gas inlet pipe 4 in the utility model is positioned at the top of carrier module medial axis.
The working principle of the utility model SCR catalytic converter can combine Fig. 1 to explain as follows:
Diesel engine exhaust gets into left buffer cavity 7 through gas inlet pipe 4, and air-flow reorganizes the back in carrier 61, and its each composition chemical reaction takes place to reduce nitrogen oxide at this.Air-flow gets into right buffer cavity 9 after carrier module 6 is handled, the perforation on right plate washer 3 gets into lumen 8 again, gets into gas outlet tube 5 from the pore that is arranged on gas outlet tube 5 at last, discharges from tail pipe through gas outlet tube 5 again.
Claims (7)
1. a SCR catalytic converter is characterized in that: comprise housing, right baffle-plate, right baffle plate, gas inlet pipe, gas outlet tube and carrier module; Right baffle-plate and right baffle interval are arranged in the housing and with the housing inner chamber and are separated into left buffer cavity, lumen and right buffer cavity, and right baffle-plate is wherein separated lumen and left buffer cavity, and right baffle plate is provided with a plurality of perforation makes right buffer cavity be communicated with lumen; Gas inlet pipe is inserted in the housing from the left vertical of housing and is communicated with left buffer cavity; Gas outlet tube inserts in the housing and passes right baffle plate and stretch in the lumen and be communicated with lumen from the right side level of housing, and carrier module is arranged between right baffle-plate and the right baffle plate and with left and right buffer cavity and is communicated with.
2. SCR catalytic converter according to claim 1; It is characterized in that: described carrier module is totally two groups of series connection; Every group of carrier module comprises a cylindrical ceramic carrier; This carrier is provided with many parallel channels vertically and connects both ends of the surface, and the internal surface of each passage is respectively equipped with catalyst coat.
3. SCR catalytic converter according to claim 2 is characterized in that: described catalyzer is that zeolite based catalysts or scherbinaite are catalyst based.
4. SCR catalytic converter according to claim 1 is characterized in that: described gas outlet tube is provided with a plurality of radial perforations being positioned on the tube wall of lumen.
5. SCR catalytic converter according to claim 1 is characterized in that: described carrier module also comprises and is coated on the outer liner of carrier, is coated on the outer thermal-protective material of liner and is coated on the outer housing of thermal-protective material.
6. SCR catalytic converter according to claim 5 is characterized in that: described thermal-protective material is a glass felt.
7. SCR catalytic converter according to claim 1 is characterized in that: the lower end mouth of pipe face of described gas inlet pipe is positioned at the top of carrier module medial axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120221839XU CN202157848U (en) | 2011-06-28 | 2011-06-28 | SCR (Selective Catalytic Reduction) catalytic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120221839XU CN202157848U (en) | 2011-06-28 | 2011-06-28 | SCR (Selective Catalytic Reduction) catalytic converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202157848U true CN202157848U (en) | 2012-03-07 |
Family
ID=45765489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120221839XU Expired - Fee Related CN202157848U (en) | 2011-06-28 | 2011-06-28 | SCR (Selective Catalytic Reduction) catalytic converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202157848U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266939A (en) * | 2013-06-04 | 2013-08-28 | 天津亿利汽车环保科技有限公司 | SCR postprocessor |
| CN103422952A (en) * | 2012-05-25 | 2013-12-04 | 天纳克（中国）有限公司 | Integrated semiconductor control rectifier (SCR) system for automobile |
| CN103422951A (en) * | 2012-05-16 | 2013-12-04 | 安徽华菱汽车有限公司 | Automobile and SCR (selective catalyst reduction) catalytic converter thereof |
-
2011
- 2011-06-28 CN CN201120221839XU patent/CN202157848U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422951A (en) * | 2012-05-16 | 2013-12-04 | 安徽华菱汽车有限公司 | Automobile and SCR (selective catalyst reduction) catalytic converter thereof |
| CN103422952A (en) * | 2012-05-25 | 2013-12-04 | 天纳克（中国）有限公司 | Integrated semiconductor control rectifier (SCR) system for automobile |
| CN103422952B (en) * | 2012-05-25 | 2017-10-10 | 天纳克（苏州）排放系统有限公司 | Integrated form automotive SCR system |
| CN103266939A (en) * | 2013-06-04 | 2013-08-28 | 天津亿利汽车环保科技有限公司 | SCR postprocessor |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120307 Termination date: 20200628 |