CN201351520Y - Tail gas catalytic converter for diesel engine - Google Patents
Tail gas catalytic converter for diesel engine Download PDFInfo
- Publication number
- CN201351520Y CN201351520Y CNU2009200670243U CN200920067024U CN201351520Y CN 201351520 Y CN201351520 Y CN 201351520Y CN U2009200670243 U CNU2009200670243 U CN U2009200670243U CN 200920067024 U CN200920067024 U CN 200920067024U CN 201351520 Y CN201351520 Y CN 201351520Y
- Authority
- CN
- China
- Prior art keywords
- buffer cavity
- right baffle
- catalytic converter
- plate
- housing
- 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
Disclosed is a tail gas catalytic converter for diesel engine, which comprises a cylindrical shell body, a left baffle and a right baffle arranged in the shell body; an inner cavity is divided into a left buffer cavity, a middle cavity and a right buffer cavity by the left baffle and the right baffle, a plurality of vent holes are arranged on the left baffle to communicate the left buffer cavity with the middle buffer cavity; a plurality of vent holes are arranged on the right baffle to communicate the right buffer cavity with the middle cavity; a catalyst carrier component is mounted in the middle cavity; a gas inlet pipe which is horizontally inserted into the left buffer cavity of the shell body is arranged at the left side of the shell body, a gas outlet pipe which is horizontally inserted into the shell body is arranged at the right side of the shell body, and the gas outlet pipe is embedded into the middle cavity after penetrating through the right buffer cavity and the right baffle. The tail gas catalytic converter for diesel engine has good fluidness, proper pressure loss and noise elimination effect.
Description
Technical field
The utility model relates to a kind of diesel engine vent gas processing equipment, particularly a kind of catalytic converter for diesel motor exhaust.
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.
Diesel motor exhaust selective catalytic reduction 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 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 catalytic converter for diesel motor exhaust, 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 tail gas back pressure, 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 this utility model is to provide a kind of good flowing properties, the moderate catalytic converter for diesel motor exhaust of crushing.
The purpose of this utility model is achieved in that a kind of catalytic converter for diesel motor exhaust, 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, and right baffle-plate is provided with a plurality of vents left buffer cavity is communicated with lumen; Right baffle plate is provided with a plurality of vents right buffer cavity is communicated with lumen; The catalyst carrier assembly is installed in lumen; Be provided with level in the left side of housing and insert gas inlet pipe in the buffer cavity of a housing left side, be provided with a level on the right side of housing and insert in the housing and pass right buffer cavity and right baffle plate gos deep into gas outlet tube in the lumen.
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 internal surface of each passage.
Described catalyzer is that zeolite based catalysts or scherbinaite are catalyst based.
The part that is positioned at right buffer cavity of described gas outlet tube is provided with a plurality of vents.
Described right baffle-plate is the spherical arc shape plate, and its convex surface is towards gas inlet pipe.
Catalytic converter for diesel motor exhaust of the present utility model 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; Bore a hole right baffle plate, the perforation gas outlet tube design, also make 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 catalytic converter for diesel motor exhaust;
Fig. 2 is the structural representation of the carrier module in the utility model.
Embodiment
Referring to Fig. 1, catalytic converter for diesel motor exhaust of the present utility model comprises a barrel-type casing 1, is provided with right baffle-plate 2 and right baffle plate 3 in housing 1, and right baffle-plate and right baffle plate are separated into left buffer cavity 4, lumen 5 and right buffer cavity 6 with the housing inner chamber.The front end of barrel-type casing 1 is lined with thermal-protective material 10.On right baffle-plate 2, is provided with a plurality of vents left buffer cavity 4 is communicated with lumen 5, and right baffle-plate 2 is the spherical arc shape plate that its convex surface is towards gas inlet pipe 8.Being provided with a plurality of vents on right baffle plate 3 is communicated with right buffer cavity 6 with lumen 5; Catalyst carrier assembly 7 is installed in lumen 5.Be provided with a gas inlet pipe 8 in the buffer cavity 4 of a level insertion housing left side in the left side of housing.Be provided with level on the right side of housing and insert in the housing and pass right buffer cavity 6 and right baffle plate 3 gos deep into gas outlet tube 9 in the lumen 5, the part that is positioned at right buffer cavity 6 of this gas outlet tube 9 is provided with a plurality of vents.
Cooperation is referring to Fig. 2, and the carrier module 7 in the utility model comprises carrier 71 altogether, is coated on the outer liner 72 of carrier and is coated on the outer housing 73 of liner.Carrier 71 is the cylindrical ceramic goods, is provided with many parallel channels 711 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 working principle of the utility model catalytic converter for diesel motor exhaust can be described as follows in conjunction with Fig. 1:
Diesel motor exhaust enters left buffer cavity 4 by gas inlet pipe 8, air-flow carried out air-flow by right baffle-plate 2 before arriving carrier module 7 mixes to improve the air-flow distribution of air-flow at carrier module 7 front-end faces, and its each composition chemical reaction takes place to reduce nitrogen oxide in carrier module 7.Air-flow enters right buffer cavity 6 after carrier module 7 is handled, a part enters gas outlet tube 9 behind the vent on right plate washer 3 and the gas outlet tube 9, and another part then directly enters gas outlet tube 9 from lumen 5, and waste gas is discharged from tail pipe afterwards.
Claims (5)
1, a kind of catalytic converter for diesel motor exhaust, 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, and right baffle-plate is provided with a plurality of vents left buffer cavity is communicated with lumen; Right baffle plate is provided with a plurality of vents right buffer cavity is communicated with lumen; The catalyst carrier assembly is installed in lumen; Be provided with level in the left side of housing and insert gas inlet pipe in the buffer cavity of a housing left side, be provided with a level on the right side of housing and insert in the housing and pass right buffer cavity and right baffle plate gos deep into gas outlet tube in the lumen.
2, catalytic converter for diesel motor exhaust 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 internal surface of each passage.
3, catalytic converter for diesel motor exhaust according to claim 2 is characterized in that: described catalyzer is that zeolite based catalysts or scherbinaite are catalyst based.
4, catalytic converter for diesel motor exhaust according to claim 1 is characterized in that: the part that is positioned at right buffer cavity of described gas outlet tube is provided with a plurality of vents.
5, catalytic converter for diesel motor exhaust according to claim 1 is characterized in that: described right baffle-plate is the spherical arc shape plate, and its convex surface is towards gas inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200670243U CN201351520Y (en) | 2009-01-15 | 2009-01-15 | Tail gas catalytic converter for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200670243U CN201351520Y (en) | 2009-01-15 | 2009-01-15 | Tail gas catalytic converter for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201351520Y true CN201351520Y (en) | 2009-11-25 |
Family
ID=41374908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200670243U Expired - Lifetime CN201351520Y (en) | 2009-01-15 | 2009-01-15 | Tail gas catalytic converter for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201351520Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782009B (en) * | 2009-01-15 | 2011-11-09 | 上海天纳克排气系统有限公司研发分公司 | Catalytic converter for diesel motor exhaust |
-
2009
- 2009-01-15 CN CNU2009200670243U patent/CN201351520Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782009B (en) * | 2009-01-15 | 2011-11-09 | 上海天纳克排气系统有限公司研发分公司 | Catalytic converter for diesel motor exhaust |
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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: Dan Xiaofeng Inventor after: Li Bing Inventor after: Shen Feng Inventor after: Zhang Baolong Inventor after: fan Qiang Inventor before: Dan Xiaofeng Inventor before: Li Bing Inventor before: Shen Feng Inventor before: Zhang Baolong |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: DAN XIAOFENG; LI BING; SHEN FENG; ZHANG BAOLONG TO: DAN XIAOFENG; LI BING;SHEN FENG; ZHANG BAOLONG; FAN JIANQIANG |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20091125 Effective date of abandoning: 20090115 |