CN201366315Y - SCR catalytic converter - Google Patents
SCR catalytic converter Download PDFInfo
- Publication number
- CN201366315Y CN201366315Y CNU2009200670258U CN200920067025U CN201366315Y CN 201366315 Y CN201366315 Y CN 201366315Y CN U2009200670258 U CNU2009200670258 U CN U2009200670258U CN 200920067025 U CN200920067025 U CN 200920067025U CN 201366315 Y CN201366315 Y CN 201366315Y
- Authority
- CN
- China
- Prior art keywords
- right baffle
- baffle plate
- cushion chamber
- plate
- 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.)
- Expired - Lifetime
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- Exhaust Gas After Treatment (AREA)
Abstract
An SCR catalytic converter comprises a casing, a left baffle plate, a right baffle plate, an air inlet pipe, an air outlet pipe and a plurality of groups of carrier components. The left baffle plate and the right baffle plate are arranged in the casing at intervals and divide the cavity of the casing into a left buffer cavity, a middle cavity and a right buffer cavity, wherein, the left baffle plate is used for separating the middle cavity and the left buffer cavity; a plurality of ventholes are formed on the right baffle plate and are communicated the right buffer cavity with the middle cavity; the air inlet pipe is inserted into the casing from the upper part of the right end surface of the casing and passes through the right baffle plate and the left baffle plate to be communicated with the left buffer cavity; the air outlet pipe is inserted into the casing from the lower end of the right end surface of the casing and passes through the right baffle plate to be hermetically connected with the left baffle plate; a plurality of ventholes are formed at the inner end of the air outlet pipe and are communicated with the middle cavity; and the carrier components are arranged in the middle cavity, connected between the left baffle plate and the right baffle plate, and communicated with the left and the right buffer cavities respectively. The SCR catalytic converter of the utility model has the advantages of good flow property and moderate loss of pressure as well as anechoic function.
Description
Technical field
The utility model relates to a kind of diesel engine vent gas treatment facility, particularly a kind of SCR catalytic converter.
Background technology
Diesel engine is having remarkable advantages than gasoline engine aspect dynamic property, economy and the reliability, particularly CO
2Discharge 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 Diesel engine 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 sulfur content.This technology is by spraying into certain density urea liquid in blast pipe, reduction reaction (reaction 3-5) takes place in ammonia that produces after pyrolysis (reaction 1) and hydrolysis (reaction 2) and nitrogen oxide in catalytic converter, be steam 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)
H
2O+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 rate 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 gas extraction system crushing, and the pressure loss that reduces catalytic converter helps reducing the back pressure of gas extraction system, thereby helps improving the performance of engine.
3, air speed
The size of air speed has been reacted the time of staying of air-flow in carrier.Air speed is more little, and the time of staying of air-flow in carrier is long more, helps reducing the reduction reaction of nitrogen oxide more.
4, acoustic insertion loss.
The utility model content
The purpose of this utility model is to provide a kind of good flowing properties, the moderate SCR catalytic converter of crushing.
The purpose of this 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 cushion chamber, lumen and right cushion chamber; Right baffle-plate is wherein separated lumen and left cushion chamber, and right baffle plate is provided with a plurality of passages right cushion chamber is communicated with lumen; Gas inlet pipe is inserted in the housing from the top, right side of housing and is passed right baffle plate and right baffle-plate is communicated with left cushion chamber; Gas outlet tube inserts in the housing from the bottom, right side of housing and passes right baffle plate and links to each other with the right baffle-plate sealing, and the inner of gas outlet tube is provided with a plurality of passages and is communicated with lumen; The many altogether groups of carrier module be arranged side by side in lumen and be connected right baffle-plate and right baffle plate between and be communicated with left and right cushion chamber respectively.
Described carrier module comprises carrier, and this carrier is cylindrical ceramic goods, and it is axially arranged with many parallel channels and connects both ends of the surface, is provided with catalyst coat at the inner surface of each passage.
Described catalyst is that zeolite based catalysts or scherbinaite are catalyst based.
Described gas inlet pipe enters the part bending downwards of left cushion chamber and gos deep into the bottom of left cushion chamber and be provided with a plurality of passages being communicated with left cushion chamber.
Described carrier module is 4 groups.
SCR catalytic converter of the present utility model is hydrodynamics (CFD) flow analysis and acoustic analysis demonstration as calculated, shows that it has good flowing properties, moderate advantage and the characteristics of crushing, and has the effect of silencer.The design of left and right sides cushion chamber, perforation gas inlet pipe 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 travels; Left and right sides cushion chamber, the design of bore a hole right baffle plate and perforation gas outlet tube also makes catalytic converter have the noise elimination effect of silencer.
Description of drawings
Fig. 1 is the overall structure schematic diagram of the utility model SCR catalytic converter;
Fig. 2 is the structural representation of the carrier module in the utility model.
The specific embodiment
Referring to Fig. 1, SCR catalytic converter of the present 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 disposed in the housing 1 and with the space in the housing and are separated into left cushion chamber 7, lumen 8 and right cushion chamber 9, right baffle plate 3 wherein is provided with a plurality of passages right cushion chamber 9 is communicated with lumen 8, right baffle-plate 2 is separated lumen 8 and left cushion chamber 7, can prevent that exhaust before and after treatment from ganging up mutually.Gas inlet pipe 4 is inserted in the housing from the right-hand member top of housing 1 and is passed right baffle plate 3 and right baffle-plate 2 enters left cushion chamber 7, gos deep into the bottom of left cushion chamber 7 behind crooked 90 degree, and its part that enters left cushion chamber 7 is provided with a plurality of passages 41 and is communicated with left cushion chamber 9.Gas outlet tube 5 inserts in the housing from the right-hand member bottom of housing and passes right baffle plate 3 and links to each other with right baffle-plate 2 sealings, and the inner of gas outlet tube 5 is provided with a plurality of pores 51 and is communicated with lumen.Carrier module 6 totally 4 groups be arranged side by side in lumen 8 and be connected right baffle-plate 2 and right baffle plate 3 between and be communicated with left and right cushion chamber respectively.
Referring to Fig. 2, the carrier module 6 in the utility model comprises carrier 61, is coated on the outer liner 62 of carrier and is coated on the outer housing 63 of liner.Carrier 61 is cylindrical ceramic goods, and it is axially arranged with many parallel channels 611 and connects both ends of the surface, is provided with catalyst coat at the inner surface of each passage.Can be catalyst based as the catalyst of catalyst coat for zeolite based catalysts or scherbinaite.Housing and liner can be protected and holding carrier, prevent carrier broken inefficacy in vehicle travels.
The operation principle of the utility model SCR catalytic converter can be described as follows in conjunction with Fig. 1:
Diesel engine exhaust enters left cushion chamber 7 by gas inlet pipe 4, and air-flow is diverted in four carrier modules 6 after reorganizing, and its each composition chemical reaction takes place to reduce nitrogen oxide at this.Air-flow enters right cushion chamber 9 after carrier module 6 is handled, enter lumen 8 through right plate washer 3 again, enters gas outlet tube 5 from the passage 51 that is arranged on gas outlet tube 5 the inners at last, discharges from tail pipe by gas outlet tube 5 again.
Claims (5)
1, a kind of 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 cushion chamber, lumen and right cushion chamber; Right baffle-plate is wherein separated lumen and left cushion chamber, and right baffle plate is provided with a plurality of passages right cushion chamber is communicated with lumen; Gas inlet pipe is inserted in the housing from the top, right side of housing and is passed right baffle plate and right baffle-plate is communicated with left cushion chamber; Gas outlet tube inserts in the housing from the bottom, right side of housing and passes right baffle plate and links to each other with the right baffle-plate sealing, and the inner of gas outlet tube is provided with a plurality of passages and is communicated with lumen; The many altogether groups of carrier module be arranged side by side in lumen and be connected right baffle-plate and right baffle plate between and be communicated with left and right cushion chamber respectively.
2, SCR catalytic converter according to claim 1, it is characterized in that: described carrier module comprises carrier, this carrier is cylindrical ceramic goods, and it is axially arranged with many parallel channels and connects both ends of the surface, is provided with catalyst coat at the inner surface of each passage.
3, SCR catalytic converter according to claim 2 is characterized in that: described catalyst is that zeolite based catalysts or scherbinaite are catalyst based.
4, SCR catalytic converter according to claim 1 is characterized in that: described gas inlet pipe enters the part bending downwards of left cushion chamber and gos deep into the bottom of left cushion chamber and be provided with a plurality of passages being communicated with left cushion chamber.
5, SCR catalytic converter according to claim 1 is characterized in that: described carrier module is 4 groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200670258U CN201366315Y (en) | 2009-01-15 | 2009-01-15 | SCR catalytic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200670258U CN201366315Y (en) | 2009-01-15 | 2009-01-15 | SCR catalytic converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201366315Y true CN201366315Y (en) | 2009-12-23 |
Family
ID=41485216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200670258U Expired - Lifetime CN201366315Y (en) | 2009-01-15 | 2009-01-15 | SCR catalytic converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201366315Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493859A (en) * | 2011-11-29 | 2012-06-13 | 杭州银轮科技有限公司 | Vehicle catalytic converter |
-
2009
- 2009-01-15 CN CNU2009200670258U patent/CN201366315Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493859A (en) * | 2011-11-29 | 2012-06-13 | 杭州银轮科技有限公司 | Vehicle catalytic converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Bing Inventor after: Dan Xiaofeng Inventor after: Shen Feng Inventor after: Zhang Baolong Inventor after: Fan Jianqiang Inventor before: Li Bing Inventor before: Dan Xiaofeng Inventor before: Shen Feng Inventor before: Zhang Baolong |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LI BING; DAN XIAOFENG; SHEN FENG; ZHANG BAOLONG TO: LI BING; DAN XIAOFENG; SHEN FENG; ZHANG BAOLONG; FAN JIANQIANG |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160719 Address after: 201814 Shanghai Jiading District City Garden Road No. 99 Patentee after: Shanghai Tenneco Exhaust System Co.,Ltd. Address before: 201814 Shanghai city Jiading District North Road No. 3218 Patentee before: Shanghai Tenneco Exhaust System Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091223 |
|
| CX01 | Expiry of patent term |