CN201330637Y - Catalytic converter used for exhaust system of diesel engine - Google Patents
Catalytic converter used for exhaust system of diesel engine Download PDFInfo
- Publication number
- CN201330637Y CN201330637Y CNU2008201573903U CN200820157390U CN201330637Y CN 201330637 Y CN201330637 Y CN 201330637Y CN U2008201573903 U CNU2008201573903 U CN U2008201573903U CN 200820157390 U CN200820157390 U CN 200820157390U CN 201330637 Y CN201330637 Y CN 201330637Y
- Authority
- CN
- China
- Prior art keywords
- right baffle
- diesel engine
- catalytic converter
- buffer cavity
- exhaust system
- 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
The utility model relates to a catalytic converter used for an exhaust system of a diesel engine. The catalytic converter comprises a cylindrical casing; a left baffle and a right baffle are arranged in the casing, and divide the cavity of the casing into a left cushion chamber, a middle chamber and a right cushion chamber; the middle chamber and the left cushion chamber are partitioned by the left baffle; a plurality of vent holes for communicating the right cushion chamber and the middle chamber are formed on the right baffle; a catalyst carrier component is arranged between the left baffle and the right baffle, and is communicated with the left and the right cushion chambers respectively; a gas inlet pipe vertically inserted into the left cushion chamber and a gas outlet pipe horizontally inserted into the casing are arranged on the left of the casing; and the gas outlet pipe passes through the right cushion chamber and the right baffle, and enters the middle chamber. The catalytic converter used for the exhaust system of the diesel engine has good flowing performance, moderate loss of pressure, as well as the effect of silencing.
Description
Technical field
The utility model 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.
Be used for diesel engine exhaust system the selective catalytic reduction technology be 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.
The model utility content
The purpose of this utility model is to provide a kind of good flowing properties, the moderate catalytic converter that is used for diesel engine exhaust system of crushing.
The purpose of this utility model is achieved in that 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 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; 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 utility model catalytic converter of being used for diesel engine exhaust system;
Fig. 2 is the structural representation of the carrier module in the utility model.
Embodiment
Referring to Fig. 1, the catalytic converter that is used for diesel engine exhaust system of the present utility model, 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 in the utility model 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 in the utility model 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 in the utility model is provided with a plurality of vents and is communicated with lumen 9.
The working principle that the utility model 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, a kind of 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 |
|---|---|---|---|
| CNU2008201573903U CN201330637Y (en) | 2008-12-18 | 2008-12-18 | Catalytic converter used for exhaust system of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201573903U CN201330637Y (en) | 2008-12-18 | 2008-12-18 | Catalytic converter used for exhaust system of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201330637Y true CN201330637Y (en) | 2009-10-21 |
Family
ID=41224015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201573903U Expired - Lifetime CN201330637Y (en) | 2008-12-18 | 2008-12-18 | Catalytic converter used for exhaust system of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201330637Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749088B (en) * | 2008-12-18 | 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 engine exhaust system |
| CN102373997A (en) * | 2011-09-26 | 2012-03-14 | 杭州银轮科技有限公司 | SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment |
| CN102444454A (en) * | 2011-12-21 | 2012-05-09 | 杭州银轮科技有限公司 | SCR (selective catalytic reduction) catalytic conversion silencer for after treatment of diesel engine |
| CN102817680A (en) * | 2012-08-30 | 2012-12-12 | 无锡市凯龙汽车设备制造有限公司 | Square box type small-carrier catalysis silencer |
| CN104179553A (en) * | 2014-08-12 | 2014-12-03 | 吉林省众鑫汽车装备有限公司 | Tail gas treating device |
-
2008
- 2008-12-18 CN CNU2008201573903U patent/CN201330637Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749088B (en) * | 2008-12-18 | 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 engine exhaust system |
| CN102373997A (en) * | 2011-09-26 | 2012-03-14 | 杭州银轮科技有限公司 | SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment |
| CN102373997B (en) * | 2011-09-26 | 2013-05-15 | 杭州银轮科技有限公司 | SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment |
| CN102444454A (en) * | 2011-12-21 | 2012-05-09 | 杭州银轮科技有限公司 | SCR (selective catalytic reduction) catalytic conversion silencer for after treatment of diesel engine |
| CN102817680A (en) * | 2012-08-30 | 2012-12-12 | 无锡市凯龙汽车设备制造有限公司 | Square box type small-carrier catalysis silencer |
| CN104179553A (en) * | 2014-08-12 | 2014-12-03 | 吉林省众鑫汽车装备有限公司 | Tail gas treating device |
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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: Jiang Bo Inventor after: fan Qiang Inventor before: Li Bing Inventor before: on the single Inventor before: Shen Feng Inventor before: Zhang Baolong Inventor before: Jiang Bo |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LI BING; DAN XIAOFENG; SHEN FENG; ZHANG BAOLONG; JIANG BO TO: DAN XIAOFENG; LI BING; SHEN FENG; ZHANG BAOLONG; JIANG BO; FAN JIANQIANG |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20091021 Effective date of abandoning: 20081218 |