CN101749088B - Catalytic converter for diesel engine exhaust system - Google Patents
Catalytic converter for diesel engine exhaust system Download PDFInfo
- Publication number
- CN101749088B CN101749088B CN2008102073069A CN200810207306A CN101749088B CN 101749088 B CN101749088 B CN 101749088B CN 2008102073069 A CN2008102073069 A CN 2008102073069A CN 200810207306 A CN200810207306 A CN 200810207306A CN 101749088 B CN101749088 B CN 101749088B
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- Prior art keywords
- buffer cavity
- right baffle
- baffle plate
- diesel engine
- plate
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- Exhaust Gas After Treatment (AREA)
Abstract
A catalytic converter for a diesel engine exhaust system comprises a cylindrical shell, wherein the shell is internally provided with a left baffle plate and a right baffle plate; the left baffle plate and the right baffle plate partition the inner cavity of the shell into a left buffer cavity, a middle cavity and a right buffer cavity; the left baffle plate partitions the middle cavity and the left buffer cavity; the right baffle plate is provided with a plurality of vent holes for communicating the right buffer cavity and the middle cavity; a catalyst carrier assembly is arranged between the left baffle plate and the right baffle plate, and is respectively communicated with the left buffer cavity and the right buffer cavity; and the left side of the shell is provided with a gas inlet pipe which is vertically inserted into the left buffer cavity of the shell, the left side of the shell is provided with a gas outlet pipe which is vertically inserted into the shell, and the gas outlet pipe passes through the right buffer cavity and the right baffle plate to reach into the middle cavity. The invention has good flowing performance, moderate loss of pressure and damping function.
Description
Technical field
The present invention relates to a kind of diesel engine vent gas processing equipment, particularly a kind of catalyst that is used for diesel engine exhaust system.
Background technique
Diesel engine is having remarkable advantages than petrol engine aspect power character, 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 selective catalytic reduction technology that is used for diesel engine exhaust system 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 by spraying into certain density urea liquid in outlet 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 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)
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 the catalytic converter that is used for diesel engine exhaust system, 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.
Summary of the invention
Purpose of the present invention is to provide a kind of good flowing properties, the moderate catalytic converter that is used for diesel engine exhaust system of crushing.
The object of the present invention is achieved like this: a kind of catalytic converter that is used for diesel engine exhaust system, comprise a barrel-type casing, in housing, be provided with right baffle-plate and right baffle plate, right baffle-plate and right baffle plate are separated into left buffer cavity, lumen and right buffer cavity with the housing inner chamber, right baffle-plate is wherein separated lumen and left buffer cavity, and right baffle plate is provided with a plurality of vents right buffer cavity is communicated with lumen; Between right baffle-plate and right baffle plate the catalyst carrier assembly is installed, the catalyst carrier assembly is communicated with left and right buffer cavity respectively; Be provided with a vertical gas inlet pipe of inserting in the buffer cavity of a housing left side in the left side of housing, be provided with a gas outlet tube in the level insertion housing in the left side of housing, this gas outlet tube passes right buffer cavity and right baffle plate gos deep in the lumen.
Described carrier module totally two groups be arranged side by side between right baffle-plate and right baffle plate, every group of carrier that comprises two sections order polyphones, each carrier is the cylindrical ceramic goods, is provided with many parallel channels in the carrier vertically and connects both ends of the surface, and the internal surface of each passage is provided with catalyst coat.
Described catalyzer is that zeolite based catalysts or scherbinaite are catalyst based.
The part that is positioned at left buffer cavity of described gas inlet pipe is provided with a plurality of vents, and the part that is positioned at lumen of described gas outlet tube is provided with a plurality of vents.
A plurality of vents of described gas inlet pipe are distributed in one side of carrier module dorsad of gas inlet pipe.
The catalyst that is used for diesel engine exhaust system of the present invention is fluid mechanics (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 silencing apparatus.The design of left and right sides buffer cavity, perforation right baffle-plate 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 design of perforation right baffle-plate, perforation gas outlet tube and outer pipe 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 present invention's catalytic converter of being used for diesel engine exhaust system;
Fig. 2 is the structural representation of the carrier module among the present invention.
Embodiment
Referring to Fig. 1, the catalytic converter that is used for diesel engine exhaust system of the present invention, comprise a barrel-type casing 1, in housing, be provided with right baffle-plate 2 and right baffle plate 3, right baffle-plate and right baffle plate are separated into left buffer cavity 8, lumen 9 and right buffer cavity 10 with the housing inner chamber, right baffle-plate 2 is wherein separated lumen 9 and left buffer cavity 8, can prevent that exhaust before and after treatment from ganging up mutually.Right baffle plate 3 is provided with a plurality of vents right buffer cavity 10 is communicated with lumen 9.Between right baffle-plate and right baffle plate catalyst carrier assembly 6 is installed, catalyst carrier assembly 6 is communicated with left and right buffer cavity respectively.Be lined with thermal-protective material 7 in the housing inboard, be provided with a vertical gas inlet pipe 4 of inserting in the buffer cavity 8 of a housing left side in the left side of housing, be provided with a gas outlet tube 5 in the level insertion housing on the right side of housing, this gas outlet tube 5 passes right buffer cavity 10 and right baffle plate 3 gos deep in the lumen 9.
Cooperation is referring to Fig. 2, the carrier module 6 among the present invention totally two groups be arranged side by side between right baffle-plate and right baffle plate every group of carriers 61 that comprise two sections order polyphones, and be coated on the outer liner of carrier 62 and be coated on the outer housing 63 of liner.Each carrier 61 is the cylindrical ceramic goods, is provided with many parallel channels in the carrier vertically and connects both ends of the surface, and the internal surface of each passage is provided with catalyst coat.Can be catalyst based as the catalyzer of catalyst coat for zeolite based catalysts or scherbinaite.Housing and liner can be protected and holding carrier, prevent carrier broken inefficacy in vehicle driving.
The part that is positioned at left buffer cavity 8 of the gas inlet pipe 4 among the present invention is provided with a plurality of vents, and a plurality of vents are distributed in one side of carrier module dorsad of gas inlet pipe.
The part that is positioned at lumen 9 of the gas outlet tube 5 among the present invention is provided with a plurality of vents and is communicated with lumen 9.
The working principle that the present invention is used for the catalytic converter of diesel engine exhaust system can be described as follows in conjunction with Fig. 1:
Diesel engine exhaust enters left buffer cavity 7 by gas inlet pipe 4, and air-flow is diverted in 2 carrier modules 6 after reorganizing, and its each composition chemical reaction takes place to reduce nitrogen oxide at this.Air-flow enters right buffer cavity 10 after carrier module 6 is handled, the perforation on right plate washer 3 is turned back and entered lumen 9 again, enters gas outlet tube 5 from the pore that is arranged on gas outlet tube 5 at last, discharges from tail pipe by gas outlet tube 5 again.
Claims (5)
1. catalytic converter that is used for diesel engine exhaust system, it is characterized in that: comprise a barrel-type casing, in housing, be provided with right baffle-plate and right baffle plate, right baffle-plate and right baffle plate are separated into left buffer cavity, lumen and right buffer cavity with the housing inner chamber, right baffle-plate is wherein separated lumen and left buffer cavity, and right baffle plate is provided with a plurality of vents right buffer cavity is communicated with lumen; Between right baffle-plate and right baffle plate the catalyst carrier assembly is installed, the catalyst carrier assembly is communicated with left and right buffer cavity respectively; Be provided with a vertical gas inlet pipe of inserting in the buffer cavity of a housing left side in the left side of housing, be provided with a gas outlet tube in the level insertion housing in the left side of housing, this gas outlet tube passes right buffer cavity and right baffle plate gos deep in the lumen.
2. the catalytic converter that is used for diesel engine exhaust system according to claim 1, it is characterized in that: described carrier module totally two groups be arranged side by side between right baffle-plate and right baffle plate, every group of carrier that comprises two sections order polyphones, each carrier is the cylindrical ceramic goods, be provided with many parallel channels in the carrier vertically and connect both ends of the surface, the internal surface of each passage is provided with catalyst coat.
3. the catalytic converter that is used for diesel engine exhaust system according to claim 2 is characterized in that: described catalyzer is that zeolite based catalysts or scherbinaite are catalyst based.
4. the catalytic converter that is used for diesel engine exhaust system according to claim 1, it is characterized in that: the part that is positioned at left buffer cavity of described gas inlet pipe is provided with a plurality of vents, and the part that is positioned at lumen of described gas outlet tube is provided with a plurality of vents.
5. the catalytic converter that is used for diesel engine exhaust system according to claim 1 is characterized in that: a plurality of vents of described gas inlet pipe are distributed in one side of carrier module dorsad of gas inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102073069A CN101749088B (en) | 2008-12-18 | 2008-12-18 | Catalytic converter for diesel engine exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102073069A CN101749088B (en) | 2008-12-18 | 2008-12-18 | Catalytic converter for diesel engine exhaust system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101749088A CN101749088A (en) | 2010-06-23 |
| CN101749088B true CN101749088B (en) | 2011-11-09 |
Family
ID=42476629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102073069A Expired - Fee Related CN101749088B (en) | 2008-12-18 | 2008-12-18 | Catalytic converter for diesel engine exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101749088B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536399A (en) * | 2011-12-31 | 2012-07-04 | 杭州银轮科技有限公司 | SCR (Selective Catalytic Reduction) catalytic converter for post treatment of tail gas of diesel engine |
| CN113120864A (en) * | 2021-05-14 | 2021-07-16 | 山东美迪宇能医疗科技股份有限公司 | A silencing device and oxygenerator for making oxygen |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201330637Y (en) * | 2008-12-18 | 2009-10-21 | 上海天纳克排气系统有限公司研发分公司 | Catalytic converter used for exhaust system of diesel engine |
-
2008
- 2008-12-18 CN CN2008102073069A patent/CN101749088B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201330637Y (en) * | 2008-12-18 | 2009-10-21 | 上海天纳克排气系统有限公司研发分公司 | Catalytic converter used for exhaust system of diesel engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101749088A (en) | 2010-06-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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. |
|
| 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: 20111109 Termination date: 20201218 |