CN102691553A - Air-assisting type SCR (Selective Catalyst Reaction) system - Google Patents
Air-assisting type SCR (Selective Catalyst Reaction) system Download PDFInfo
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- CN102691553A CN102691553A CN2012101943507A CN201210194350A CN102691553A CN 102691553 A CN102691553 A CN 102691553A CN 2012101943507 A CN2012101943507 A CN 2012101943507A CN 201210194350 A CN201210194350 A CN 201210194350A CN 102691553 A CN102691553 A CN 102691553A
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- urea
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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)
Abstract
The invention discloses an air-assisting type SCR (Selective Catalyst Reaction) system, comprising a urea box, a urea supplying unit, a nozzle, a vehicle-mounted compressed air source, a catalyzing device and a ACU (Arithmetic Control Unit), wherein the urea box and the vehicle-mounted compressed air source are connected with the urea supplying unit through a pipeline and the other end of the urea box is connected with a cooling water inlet pipeline and a cooling water returning pipeline; the other side of the urea supplying unit is connected with the nozzle and the nozzle is aligned with an automobile exhaust gas discharging pipe; the catalyzing device is mounted on the automobile exhaust gas discharging pipe; an air exhausting temperature sensor and an NOX sensor are arranged on an upstream of the catalyzing device on the automobile exhaust gas discharging pipe; the air exhausting temperature sensor, the NOX sensor, an environment temperature senor, an engine CAN (Controller Area Network) bus, the urea box and a valve on a water inlet pipe in front of the urea box and the urea supplying unit are electrically connected with the ACU; and the urea supplying unit is formed by three sections of pipelines including a urea liquid inlet pipeline, a urea spraying pipeline and an air inlet pipeline. According to the air-assisting type SCR system, the use cost of the system is reduced and the service life of the system is prolonged.
Description
Technical field
The present invention relates to automotive emission control technique field, particularly relate to a kind of gas that is used for the control of diesel car exhaust emissions and help formula SCR system.
Background technique
SCR is meant and is installed in the diesel car vent systems, with the catalytic reduction device that the NOx in the diesel emission is catalysed and reduced into N2 and O2, selects aqueous solution of urea as reducing agent.Aqueous solution of urea is ejected in the outlet pipe at the catalyzer upper reaches, and hydrolysis is produced as CO2 and ammonia under the effect of EGT and air-flow, and ammonia is reduced into free of contamination nitrogen G&W as reducing agent with NOx.Urea liquid must be according to the engine operating condition quantitative injection, thus the urea-spray system need with the control unit of engine communication.The working efficiency of SCR depends on gas temperature, and common gas row temperature reaches the above NOx transformation efficiency of 250 0C and can reach more than 85%.
At present, domestic diesel engine manufacturing enterprise tackles Abgasgesetz state IV on the horizon and more high-stage emission-reduction technology route is all clear and definite with, and SCR is a kind of efficient, practical vehicular emission control technique.Be that the SCR technology path is the optimal selection that medium and heavy diesel engine reaches IV stage emission standard.
Summary of the invention
Technical problem to be solved by this invention is that a kind of gas that designs to above-mentioned needs of the prior art helps formula SCR system; This gas helps the urea supply unit of formula SCR system to need not the urea return line, can reduce system's user cost and system's long service life.And exhaust gas temperature sensor or be placed on the catalyst converter upper reaches or be placed on the catalyst converter downstream does not have influence for emission control, is convenient to the car load mounting arrangements.
The technical problem that the present invention requires to solve can realize through following technological scheme:
A kind of gas helps formula SCR system; Comprise urea box, urea supply unit, nozzle, vehicle-mounted source of compressed air, catalyst converter, control unit ACU; Said urea box is connected the urea supply unit with vehicle-mounted source of compressed air through pipeline; The urea box the other end also connects cooling water inlet pipe road and CWR road, and said urea supply unit opposite side also connects nozzle, and said nozzle is over against the motor vehicle exhaust emission pipeline; Said catalyst converter is installed on the motor vehicle exhaust emission pipeline and with this pipeline and communicates, and exhaust gas temperature sensor and NO have been installed in the upper reaches of catalyst converter on the said motor vehicle exhaust emission pipeline
XSensor, exhaust gas temperature sensor, NO
XValve, urea supply unit on the inlet pipeline before sensor, environment temperature sensor, motor CAN bus, urea box, the urea box are electrically connected with control unit ACU, and said urea supply unit is made up of urea feed liquor pipeline, urea-spray pipeline, three sections pipelines of air inlet pipeline.
Said exhaust gas temperature sensor also can be positioned at the catalyst converter downstream.
On the pipeline between said urea box, vehicle-mounted source of compressed air and urea supply unit filter cleaner is installed all.
Owing to adopted as above technological scheme, the present invention has following characteristics: the urea supply unit does not have the urea return line, can reduce system's user cost; Exhaust gas temperature sensor can be arranged in the upper reaches or the downstream of catalyst converter, does not have influence for emission control, is convenient to the car load mounting arrangements.
Description of drawings
Fig. 1 is a system architecture diagram of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1, the present invention mainly is made up of urea box, urea supply unit, nozzle, catalyst converter, control unit ACU, vehicle-mounted compressed gas source and corresponding connecting pipeline etc.Urea box is connected through pipeline with the urea supply unit with vehicle-mounted compressed gas source; Urea supply is connected with nozzle before the unit; Nozzle is over against the motor vehicle exhaust emission pipeline; Catalyst converter also has been installed on the motor vehicle exhaust emission pipeline, and exhaust gas temperature sensor and NO have also been installed in the upper reaches of catalyst converter on the motor vehicle exhaust emission pipeline
XSensor, exhaust gas temperature sensor can also be installed in the catalyst converter downstream.Exhaust gas temperature sensor, NO
XCooling water inlet valve, urea supply unit, motor CAN bus before sensor, environment temperature sensor, urea box, the urea box all are electrically connected with control unit ACU, so that controlled unit ACU control.The urea supply unit is made up of urea feed liquor pipeline, urea-spray pipeline, air inlet pipeline.
Engine operation, tail gas be through catalyst converter, and when delivery temperature reaches more than 2000 degrees centigrade and the NOx discharging exceeds standard, system starts working.Wherein temperature transducer and NOx sensor and motor CAN bus obtain data and feed back to control unit ACU; Control unit ACU obtains various information through self-sensor device and CAN bus; According to engine operating condition; Through inner calculating, draw the aqueous solution of urea emitted dose that needs, and accurately control metering pump and spray; Its signal is issued the urea supply unit, and the inner metering pump in urea supply unit sprays; The urea supply unit mixes the back with its aqueous solution of urea and arrives urea nozzle through injection line with vehicle-mounted pressurized air; Mix back with tail gas through the urea nozzle atomized spray in the catalyst converter upstream exhaust pipe and get into catalyst converter, the effect through catalyst converter is with its NOx decomposition-reduction.
Help formula SCR system schema relatively with similar gas:
1) gas of the present invention helps in the formula SCR system schema and need not the urea return line.Gas of the present invention helps formula SCR urea supply unit to contain: urea feed liquor pipeline, urea-spray pipeline, air inlet pipeline.Other like products have: urea feed liquor pipeline, urea-spray pipeline, urea return line, air inlet pipeline.
2) compare with the market like product, need not the urea return line.Can reduce the advantage of system's user cost and system's long service life.
3) the exhaust gas temperature sensor position is optional;
According to customer requirement, can be arranged in the upper reaches or the downstream of catalyst converter, there is not influence for emission control, be convenient to the car load mounting arrangements.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention; The present invention also has various changes and modifications under the prerequisite that does not break away from spirit and scope of the invention, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (3)
1. a gas helps formula SCR system; It is characterized in that; Comprise urea box, urea supply unit, nozzle, vehicle-mounted source of compressed air, catalyst converter, control unit ACU, said urea box is connected the urea supply unit with vehicle-mounted source of compressed air through pipeline, and the urea box the other end also connects cooling water inlet pipe road and CWR road; Said urea supply unit opposite side also connects nozzle; Said nozzle is over against the motor vehicle exhaust emission pipeline, and said catalyst converter is installed on the motor vehicle exhaust emission pipeline and with this pipeline and communicates, and exhaust gas temperature sensor and NO have been installed in the upper reaches of catalyst converter on the said motor vehicle exhaust emission pipeline
XSensor, exhaust gas temperature sensor, NO
XValve, urea supply unit on the inlet pipeline before sensor, environment temperature sensor, motor CAN bus, urea box, the urea box are electrically connected with control unit ACU, and said urea supply unit is made up of urea feed liquor pipeline, urea-spray pipeline, three sections pipelines of air inlet pipeline.
2. gas as claimed in claim 1 helps formula SCR system, it is characterized in that, said exhaust gas temperature sensor also can be positioned at the catalyst converter downstream.
3. according to claim 1 or claim 2 gas helps formula SCR system, it is characterized in that, on the pipeline between said urea box, vehicle-mounted source of compressed air and urea supply unit filter cleaner is installed all.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101943507A CN102691553A (en) | 2012-06-13 | 2012-06-13 | Air-assisting type SCR (Selective Catalyst Reaction) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101943507A CN102691553A (en) | 2012-06-13 | 2012-06-13 | Air-assisting type SCR (Selective Catalyst Reaction) system |
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| CN102691553A true CN102691553A (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101943507A Pending CN102691553A (en) | 2012-06-13 | 2012-06-13 | Air-assisting type SCR (Selective Catalyst Reaction) system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195546A (en) * | 2013-03-26 | 2013-07-10 | 无锡市凯龙汽车设备制造有限公司 | Air-assisted urea measuring injection system |
| CN103821597A (en) * | 2014-03-06 | 2014-05-28 | 万向通达股份公司 | Vehicle emission post treatment system |
| CN105626215A (en) * | 2014-10-27 | 2016-06-01 | 金有纯 | Device for regulating and controlling actual supply amount of urea entering exhaust system and regulating and controlling method |
| CN106837490A (en) * | 2017-03-30 | 2017-06-13 | 凯德斯环保科技（烟台）有限公司 | A kind of auxiliary formula urea injection apparatus of the gas for emptying |
| CN107420164A (en) * | 2017-04-28 | 2017-12-01 | 东风商用车有限公司 | Urea injection system with external urea nozzle air cooling branch and application method |
| CN112343694A (en) * | 2019-08-08 | 2021-02-09 | 无锡恒和环保科技有限公司 | Gas-assisted urea injection metering device for SCR system |
| CN113232243A (en) * | 2021-01-16 | 2021-08-10 | 温州南冠机械有限公司 | SCR denitration catalyst production mold and production method thereof |
| CN114100369A (en) * | 2021-11-15 | 2022-03-01 | 长春盛恒环保科技有限公司 | Multifunctional automobile exhaust treatment liquid and preparation method and system thereof |
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| CN1560439A (en) * | 2004-02-27 | 2005-01-05 | 清华大学 | A reducing agent supply device for a nitrogen oxide catalytic converter of an internal combustion engine |
| CN201329254Y (en) * | 2008-05-28 | 2009-10-21 | 中国第一汽车集团公司 | On-vehicle SCR metering injection system capable of taking NO* in exhaust as variable |
| CN201347788Y (en) * | 2009-01-14 | 2009-11-18 | 无锡市凯龙汽车设备制造有限公司 | Air-mixing metering system for exhaust-gas disposal of vehicle |
| CN202100308U (en) * | 2011-06-21 | 2012-01-04 | 中国汽车工程研究院股份有限公司 | Selective catalytic reduction (SCR) system for urea solution metering injection |
| CN202611818U (en) * | 2012-06-13 | 2012-12-19 | 安徽艾可蓝节能环保科技有限公司 | Air-assisted selective catalytic reduction (SCR) system |
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2012
- 2012-06-13 CN CN2012101943507A patent/CN102691553A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1560439A (en) * | 2004-02-27 | 2005-01-05 | 清华大学 | A reducing agent supply device for a nitrogen oxide catalytic converter of an internal combustion engine |
| CN201329254Y (en) * | 2008-05-28 | 2009-10-21 | 中国第一汽车集团公司 | On-vehicle SCR metering injection system capable of taking NO* in exhaust as variable |
| CN201347788Y (en) * | 2009-01-14 | 2009-11-18 | 无锡市凯龙汽车设备制造有限公司 | Air-mixing metering system for exhaust-gas disposal of vehicle |
| CN202100308U (en) * | 2011-06-21 | 2012-01-04 | 中国汽车工程研究院股份有限公司 | Selective catalytic reduction (SCR) system for urea solution metering injection |
| CN202611818U (en) * | 2012-06-13 | 2012-12-19 | 安徽艾可蓝节能环保科技有限公司 | Air-assisted selective catalytic reduction (SCR) system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195546A (en) * | 2013-03-26 | 2013-07-10 | 无锡市凯龙汽车设备制造有限公司 | Air-assisted urea measuring injection system |
| CN103821597A (en) * | 2014-03-06 | 2014-05-28 | 万向通达股份公司 | Vehicle emission post treatment system |
| CN105626215A (en) * | 2014-10-27 | 2016-06-01 | 金有纯 | Device for regulating and controlling actual supply amount of urea entering exhaust system and regulating and controlling method |
| CN106837490A (en) * | 2017-03-30 | 2017-06-13 | 凯德斯环保科技（烟台）有限公司 | A kind of auxiliary formula urea injection apparatus of the gas for emptying |
| CN107420164A (en) * | 2017-04-28 | 2017-12-01 | 东风商用车有限公司 | Urea injection system with external urea nozzle air cooling branch and application method |
| CN107420164B (en) * | 2017-04-28 | 2023-10-10 | 东风商用车有限公司 | Urea injection system with external urea nozzle air cooling branch and use method |
| CN112343694A (en) * | 2019-08-08 | 2021-02-09 | 无锡恒和环保科技有限公司 | Gas-assisted urea injection metering device for SCR system |
| CN113232243A (en) * | 2021-01-16 | 2021-08-10 | 温州南冠机械有限公司 | SCR denitration catalyst production mold and production method thereof |
| CN113232243B (en) * | 2021-01-16 | 2022-12-06 | 温州南冠机械有限公司 | SCR denitration catalyst production mold and production method thereof |
| CN114100369A (en) * | 2021-11-15 | 2022-03-01 | 长春盛恒环保科技有限公司 | Multifunctional automobile exhaust treatment liquid and preparation method and system thereof |
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Application publication date: 20120926 |