CN202611818U - Air-assisted selective catalytic reduction (SCR) system - Google Patents
Air-assisted selective catalytic reduction (SCR) system Download PDFInfo
- Publication number
- CN202611818U CN202611818U CN201220278070XU CN201220278070U CN202611818U CN 202611818 U CN202611818 U CN 202611818U CN 201220278070X U CN201220278070X U CN 201220278070XU CN 201220278070 U CN201220278070 U CN 201220278070U CN 202611818 U CN202611818 U CN 202611818U
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- China
- Prior art keywords
- urea
- pipeline
- supply unit
- temperature sensor
- box
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- 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.)
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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
Abstract
The utility model discloses an air-assisted selective catalytic reduction (SCR) system. The air-assisted SCR system comprises a urea box, a urea supply unit, a nozzle, a vehicle-mounted compressed air source, a catalyst and an add control unit (ACU), wherein the urea box and the vehicle-mounted compressed air source are connected with the urea supply unit through pipelines; the other end of the urea box is connected with a cooling water inlet pipeline and a cooling water return pipeline; the other side of the urea supply unit is connected with the nozzle; the nozzle faces to an automobile exhaust discharge pipeline; the catalyst is arranged on the automobile exhaust discharge pipeline; an exhaust temperature sensor and an NOX sensor are arranged at the upstream of the catalyst on the automobile exhaust discharge pipeline; the exhaust temperature sensor, the NOX sensor, an ambient temperature sensor, an engine controller area network (CAN) bus, the urea box, a valve on a water inlet pipeline in front of the urea box and the urea supply unit are electrically connected with the ACU; and the urea supply unit consists of a urea inlet pipeline, a urea spraying pipeline and an air inlet pipeline. The air-assisted SCR system can reduce the using cost and prolong the service life.
Description
Technical field
The utility model relates to automotive emission control technique field, particularly relates to a kind of gas that is used for the control of diesel car exhaust emissions and helps 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.
The model utility content
The utility model technical problem to be solved 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 utility model 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 utlity model 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 the utility model system architecture diagram.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, the utility model 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) the utility model gas helps in the formula SCR system schema and need not the urea return line.The utility model gas 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 the advantage of basic principle, major character and the utility model of the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the utility model scope that requires protection.The utility model 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 |
|---|---|---|---|
| CN201220278070XU CN202611818U (en) | 2012-06-13 | 2012-06-13 | Air-assisted selective catalytic reduction (SCR) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220278070XU CN202611818U (en) | 2012-06-13 | 2012-06-13 | Air-assisted selective catalytic reduction (SCR) system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202611818U true CN202611818U (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220278070XU Expired - Lifetime CN202611818U (en) | 2012-06-13 | 2012-06-13 | Air-assisted selective catalytic reduction (SCR) system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202611818U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691553A (en) * | 2012-06-13 | 2012-09-26 | 安徽艾可蓝节能环保科技有限公司 | Air-assisting type SCR (Selective Catalyst Reaction) system |
| CN105201603A (en) * | 2015-10-20 | 2015-12-30 | 西华大学 | Urea spraying device for diesel exhaust aftertreatment |
| CN105986861A (en) * | 2015-02-10 | 2016-10-05 | 安徽艾可蓝节能环保科技有限公司 | SCR tail gas treatment system for engine |
| CN109555583A (en) * | 2019-01-11 | 2019-04-02 | 安徽艾可蓝环保股份有限公司 | A kind of integrated gas helps formula urea injection system |
-
2012
- 2012-06-13 CN CN201220278070XU patent/CN202611818U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691553A (en) * | 2012-06-13 | 2012-09-26 | 安徽艾可蓝节能环保科技有限公司 | Air-assisting type SCR (Selective Catalyst Reaction) system |
| CN105986861A (en) * | 2015-02-10 | 2016-10-05 | 安徽艾可蓝节能环保科技有限公司 | SCR tail gas treatment system for engine |
| CN105201603A (en) * | 2015-10-20 | 2015-12-30 | 西华大学 | Urea spraying device for diesel exhaust aftertreatment |
| CN109555583A (en) * | 2019-01-11 | 2019-04-02 | 安徽艾可蓝环保股份有限公司 | A kind of integrated gas helps formula urea injection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 247000 Guichi Industrial Park, Anhui, Chizhou Patentee after: ACTBLUE CO., LTD. Address before: 247000 Guichi Industrial Park, Anhui, Chizhou Patentee before: Anhui ActBlue Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |
|
| CX01 | Expiry of patent term |