CN202001087U - Automobile exhaust after-treatment device through selective catalytic reduction - Google Patents
Automobile exhaust after-treatment device through selective catalytic reduction Download PDFInfo
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- CN202001087U CN202001087U CN2011200100976U CN201120010097U CN202001087U CN 202001087 U CN202001087 U CN 202001087U CN 2011200100976 U CN2011200100976 U CN 2011200100976U CN 201120010097 U CN201120010097 U CN 201120010097U CN 202001087 U CN202001087 U CN 202001087U
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- exhaust
- catalytic reduction
- urea
- admission line
- selective catalytic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
An automobile exhaust after-treatment device through selective catalytic reduction comprises a shell, a catalyst carrier, an intake duct and an exhaust dust, wherein the intake duct and the exhaust duct are arranged on the shell, the catalyst carrier is arranged on a gas flow path of the shell, and the intake duct is further connected with a urea solution injection device. The selective-catalytic reduction automobile exhaust postprocessor is capable of realizing the function of purifying tail gas of motor vehicles by adopting a simple device, and further can be installed on an exhaust pipe of the existing automobile as an independent part, thereby being more convenient to promote and use.
Description
Technical field
The utility model relates to a sharp automobile exhaust gas processing apparatus, especially a kind of selective catalytic reduction vehicle exhaust preprocessor.
Background technique
Be becoming tight in world energy supplies day, under the situation that environmental problem becomes increasingly conspicuous, energy-conserving and environment-protective have become the important content of current social development.Country complies with development of times; proposed to adhere to economize on resources and protected the fundamental state policy of environment; be placed on the extrusion position of industrialization, modernization development strategy building a resource-conserving and environment-friendly society, and important agenda has been put in energy-saving and emission-reduction work.
The tail gas of Motor Vehicle is the major pollutants in the atmosphere, and therefore at the effulent of Motor Vehicle, people adopt various method means to eliminate the harmful matter that it contains.The harmful matter, especially the NOx compound that adopt selective catalytic reduction (SCR) method can handle in the engine emission are a kind of very effective methods, its principle NO+NO2+2NH3 → 2N2+3H2O; 4NO+O2+4NH3 → 4N2+6H2O; 2NO2+O2+4NH3 → 3N2+6H2O.
Summary of the invention
In order to solve in the prior art, the problem that motor-vehicle tail-gas pollutes the utility model proposes the selective catalytic reduction vehicle exhaust preprocessor that a kind of employing selective catalytic reduction (SCR) method is handled vehicle exhaust, and concrete technological scheme is as follows:
A kind of selective catalytic reduction vehicle exhaust preprocessor comprises housing, catalyst carrier, admission line and exhaust duct; Described admission line and exhaust duct are located on the housing, and catalyst carrier is located on the interior gas flow paths of housing; Also be connected with the urea liquid injection device on the described admission line.
Described catalyst carrier is a plurality of porous ceramic pipes, and the porous ceramic pipe inlet end is connected with admission line, and exhaust end is connected with exhaust duct; The ceramic hole inwall of porous ceramic pipe is provided with catalyst coat.Catalyzer on the coating be with precious metals pt, Rh and Pd as active constituent, add heat stabilizer simultaneously, its prescription fibrous root is done corresponding adjustment according to different motors.
As improvement, described admission line, exhaust duct stretch in the housing, and be parallel with porous ceramic pipe.In housing, be provided with individual cavity, i.e. waste gas mixing chamber, the inlet end of described porous ceramic pipe is connected with described waste gas mixing chamber with admission line.Also be provided with the waste gas discharge side, the main body of porous ceramic pipe and the inlet end of exhaust duct are located in the waste gas discharge side.Described exhaust duct the waste gas discharge side in mouth of pipe sealing, on the tube wall at exhaust duct mouth of pipe place, be densely covered with aperture.Also be provided with dividing plate in the waste gas discharge side, dividing plate is provided with a plurality of holes, and the waste gas discharge side is divided into two independent parts by dividing plate; The inlet end branch of the exhaust end of porous ceramic pipe and described exhaust duct is located in described two-part, and porous ceramic pipe is communicated with by the hole on the dividing plate with the inlet end of exhaust duct.
Adopt above-mentioned improvement, can reduce the noise of exhaust.
Described urea liquid injection device is located at the outside branch of admission line; The urea liquid injection device comprises urea-spray amount control unit, tail gas sensor, temperature transducer, urea liquid jar, urea solution metering device and spraying urea liquid injection device; Tail gas sensor and temperature transducer are located in the described admission line, gather the tail gas parameter of automobile; The output terminal of tail gas sensor and temperature transducer is connected urea-spray amount control unit, and the output terminal of urea-spray amount control unit connects measuring apparatus; The outlet of urea liquid jar connects the inlet of urea solution metering device, and the urea solution metering device connects the inlet of spraying urea liquid injection device, and the jet blower of spraying urea liquid injection device connects admission line.
Compared with prior art, the utility model adopts simple device can play the effect of purifying motor tail gas.And the utility model can be used as individual components and is installed on the existing automobile exhaust pipe, is more conducive to promote and use.
Description of drawings
Fig. 1 is embodiment's principle schematic
Fig. 2 is embodiment's a structure cross-sectional schematic
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
A kind of selective catalytic reduction vehicle exhaust preprocessor comprises housing, catalyst carrier, admission line and exhaust duct; Described admission line and exhaust duct are located on the housing, and catalyst carrier is located on the interior gas flow paths of housing; Also be connected with the urea liquid injection device on the described admission line.
Described catalyst carrier is a porous ceramic pipe, and the porous ceramic pipe inlet end is connected with admission line, and exhaust end is connected with exhaust duct; The ceramic hole inwall of porous ceramic pipe is provided with catalyst coat.Catalyzer on the coating be with precious metals pt, Rh and Pd as active constituent, add heat stabilizer simultaneously, its prescription fibrous root is done corresponding adjustment according to different motors, differing at this one has illustrated for example.
Described admission line, exhaust duct stretch in the housing, and be parallel with porous ceramic pipe.In housing, be provided with individual cavity, i.e. waste gas mixing chamber, the inlet end of described porous ceramic pipe is connected with described waste gas mixing chamber with admission line.Also be provided with the waste gas discharge side, the main body of porous ceramic pipe and the inlet end of exhaust duct are located in the waste gas discharge side.Described exhaust duct the waste gas discharge side in mouth of pipe sealing, on the tube wall at exhaust duct mouth of pipe place, be densely covered with aperture.Also be provided with dividing plate in the waste gas discharge side, dividing plate is provided with a plurality of holes, and the waste gas discharge side is divided into two independent parts by dividing plate; The inlet end branch of the outlet side of porous ceramic pipe and described exhaust duct is located in described two-part, and porous ceramic pipe is communicated with by the hole on the dividing plate with the inlet end of exhaust duct.
Described urea liquid injection device is located at the outside branch of admission line; The urea liquid injection device comprises urea-spray amount control unit, tail gas sensor, temperature transducer, urea liquid jar, urea solution metering device and spraying urea liquid injection device; Tail gas sensor and temperature transducer are located in the described admission line, gather the tail gas parameter of automobile; The output terminal of tail gas sensor and temperature transducer is connected urea-spray amount control unit, and the output terminal of urea-spray amount control unit connects the urea solution metering device; The outlet of urea liquid jar connects the inlet of urea solution metering device, and the urea solution metering device connects the inlet of spraying urea liquid injection device, and the outlet of spraying urea liquid injection device connects admission line.
Its process: tail gas sensor and temperature transducer reach urea-spray amount control unit (ECU) to tail gas information, carry out tail gas composition temperature analysis by ECU, the analysis result information measuring apparatus, control the urea-spray amount of the jet blower of injection apparatus again by measuring apparatus.In this device working procedure, urea liquid generally sprays in people's exhaust airstream with the ratio of fuel consumption 5%.
Tail gas sensor, temperature transducer, urea-spray amount control unit and urea solution metering device and spraying urea liquid injection device all are the comparative maturity products in the prior art, are not further limited at this.
In this example, catalyst carrier adopts ternary catalyzing unit, this ternary catalyzing unit to have 4, and be listed in the waste gas discharge side.
The working principle of ternary catalyzing unit is, when the vehicle exhaust of high temperature passes through purification plant, purifying agent in the ternary catalyzing unit will strengthen the activity of CO, HC and three kinds of gases of NOx, impel it to carry out certain OR chemical reaction, wherein CO at high temperature is oxidized into colourless, nontoxic carbon dioxide; The HC compound at high temperature is oxidized to water (H20) and carbon dioxide; NOx is reduced into nitrogen and oxygen.Three kinds of harmful gases become innocuous gas, and vehicle exhaust is purified.
The principle of this processor is that the reducing agent urea liquid is injected in the engine emission outlet pipe in the waste gas according to a certain percentage, under exhaust gas temperature and air-flow effect, urea can decompose fast, discharge ammonia, the NOx effect higher with content reaches the purpose that reduces the NOx discharging, because the reducing agent of SCR is a urea, its stable performance under user mode not, and advantage obtains people's such as it is simple to have a chemical reaction, and required reducing agent relative quantity is few popularization and use.Traditional silencing apparatus manufacturing process, by this technology utilization, make former state IV motor on the basis of low oil consumption low emission, further reduce NOx (nitrogen oxide) discharging 50%, this technology can also improve the high low temperature transformation efficiency of vehicle exhaust simultaneously, reduces further that city bus is frequently started to walk, the NOx discharging under the not high runnability of the speed of a motor vehicle.
Claims (8)
1. a selective catalytic reduction vehicle exhaust preprocessor is characterized in that comprising housing, catalyst carrier, admission line and exhaust duct; Described admission line and exhaust duct are located on the housing, and catalyst carrier is located on the interior gas flow paths of housing; Also be connected with the urea liquid injection device on the described admission line.
2. selective catalytic reduction vehicle exhaust preprocessor according to claim 1 is characterized in that described catalyst carrier is a porous ceramic pipe, has a plurality of; The porous ceramic pipe inlet end is connected with admission line, and exhaust end is connected with exhaust duct; The ceramic hole inwall of porous ceramic pipe is provided with catalyst coat.
3. selective catalytic reduction vehicle exhaust preprocessor according to claim 2 is characterized in that described admission line, exhaust duct stretch in the housing, and is parallel with porous ceramic pipe.
4. selective catalytic reduction vehicle exhaust preprocessor according to claim 3 is characterized in that being provided with individual cavity in housing, i.e. waste gas mixing chamber, and the inlet end of described porous ceramic pipe is connected with described waste gas mixing chamber with admission line.
5. selective catalytic reduction vehicle exhaust preprocessor according to claim 4 is characterized in that also being provided with the waste gas discharge side, and the main body of porous ceramic pipe and the inlet end of exhaust duct are located in the waste gas discharge side.
6. selective catalytic reduction vehicle exhaust preprocessor according to claim 5, the described exhaust duct of its feature the waste gas discharge side in mouth of pipe sealing, on the tube wall at exhaust duct mouth of pipe place, be densely covered with aperture.
7. selective catalytic reduction vehicle exhaust preprocessor according to claim 6 is characterized in that being provided with dividing plate in the waste gas discharge side, and dividing plate is provided with a plurality of holes, and the waste gas discharge side is divided into two independent parts by dividing plate; The inlet end branch of the exhaust end of porous ceramic pipe and described exhaust duct is located in described two-part, and porous ceramic pipe is communicated with by the hole on the dividing plate with the inlet end of exhaust duct.
8. according to the arbitrary described selective catalytic reduction vehicle exhaust preprocessor of claim 1～7, it is characterized in that described urea liquid injection device is located at the outside branch of admission line; The urea liquid injection device comprises urea-spray amount control unit, tail gas sensor, temperature transducer, urea liquid jar, urea solution metering device and spraying urea liquid injection device; Tail gas sensor and temperature transducer are located in the described admission line, gather the tail gas parameter of automobile; The output terminal of tail gas sensor and temperature transducer is connected urea-spray amount control unit, and the output terminal of urea-spray amount control unit connects the urea solution metering device; The outlet of urea liquid jar connects the inlet of urea solution metering device, and the urea solution metering device connects the inlet of spraying urea liquid injection device, and the jet blower of spraying urea liquid injection device connects admission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200100976U CN202001087U (en) | 2011-01-14 | 2011-01-14 | Automobile exhaust after-treatment device through selective catalytic reduction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200100976U CN202001087U (en) | 2011-01-14 | 2011-01-14 | Automobile exhaust after-treatment device through selective catalytic reduction |
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| CN202001087U true CN202001087U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200100976U Expired - Fee Related CN202001087U (en) | 2011-01-14 | 2011-01-14 | Automobile exhaust after-treatment device through selective catalytic reduction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104747256A (en) * | 2013-12-27 | 2015-07-01 | 陕西汽车集团有限责任公司 | Urea mixer in exhaust gas emission system of diesel car |
-
2011
- 2011-01-14 CN CN2011200100976U patent/CN202001087U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104747256A (en) * | 2013-12-27 | 2015-07-01 | 陕西汽车集团有限责任公司 | Urea mixer in exhaust gas emission system of diesel car |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20180114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |