CN201778868U - One-valve double-control jet apparatus for urea reducing agents - Google Patents
One-valve double-control jet apparatus for urea reducing agents Download PDFInfo
- Publication number
- CN201778868U CN201778868U CN2010205234760U CN201020523476U CN201778868U CN 201778868 U CN201778868 U CN 201778868U CN 2010205234760 U CN2010205234760 U CN 2010205234760U CN 201020523476 U CN201020523476 U CN 201020523476U CN 201778868 U CN201778868 U CN 201778868U
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- Prior art keywords
- valve
- reducing agent
- flow control
- electromagnetic flow
- control valve
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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
- Y02T10/12—Improving ICE efficiencies
-
- 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 utility model relates to a one-valve double-control jet apparatus for urea reducing agents. The jet apparatus is characterized in that a urea reducing agent box is in series connection with a pipeline and a filter; the filter is in series connection with an electromagnetic flow control valve; and two outlet ends of the electromagnetic flow control valve are respectively in parallel connection with two precision mechanical switch valves. When in use, the electromagnetic flow control valve and one precision mechanical switch valve at one output end are respectively and separately started, or the precision mechanical switch valves at the two outlet ends are started simultaneously prior to being converged to a pressure maintaining valve, and then the urea reducing agents are transferred from the pressure maintaining valve to a urea reducing agent nozzle and further sprayed into an exhaust pipe by the aid of air. The one-valve double-control jet apparatus for urea reducing agents not only can meet the requirements of national 4SCR standards, but also prevents NH3 escape volume, a diesel oxidation catalyst (DOC) device used for NH3 oxidation treatment can be omitted, automobile configuration is simplified, and cost is reduced.
Description
Technical field:
The utility model relates to an a kind of valve two controlled jetting devices of carbamide reducing agent, is applied to the reprocessing industry of vehicle exhaust.
Background technique:
In the coming years, the car manufactures, particularly US and European in the whole world will forcibly be implemented some severeer specifications about the emission compliance aspect of automobile nitrogen oxide NOx and particulate PM, for example, and Europe 5 and Europe 6 emission standards.
Under the pressure of Abgasgesetz, external automobile-used heavy-duty diesel engine just constantly carries out technology upgrading and improvement on the one hand, on the other hand, select appropriate post-processing technology strategy and equipment, for example, SCR (Selective Catalytic Reduction) catalyzed conversion reduction technique, DPF(Diesel Particulate Filter) particle trap, DOC(Diesel Oxidation Catalyst) oxidation catalyst etc.
The essence of SCR technology is to utilize urea at high temperature to decomposite NH
3, as the NH of reducing agent
3With the NO in the engine exhaust
xUnder the comprehensive function of catalyzer and temperature, react, generate nontoxic N under the desirable operating mode
2And H
2O, thus reach the purpose of purification.The SCR technology began abroad the denitration technology that the stationary source as power station etc. uses and has carried out exploitation and extensive use from the seventies.For tackling the requirement of new environmental regulation, abroad the SCR technology successfully has been transplanted on the diesel car since 90 years, and the corresponding exploitation checking of having carried out SCR catalyst process technology and carbamide reducing agent, realized industrial applications, for example, European and Japanese.At present, Ou Zhou most of MANUFACTURER have begun adamantine employing SCR technology and have realized Europe 4 and Europe 5 standards.For example, in the main commercial vehicle company of 7 families in Europe, there are 5 families (wearing gram, Reynolds, IVECO, Volvo and daf) to select the SCR technology to reach Europe 4 and Europe 5 standards.Other two families (Scania and graceful) then tend to the EGR technology, but also do not repel the SCR technology.With Dai Ke group is example, from January, 2005, just releases the Actros board heavy duty truck that satisfies Europe 4 and Europe 5 standards, and gives a fashionable name ' BlueTec '.The post processing mode of BlueTec all adopts the SCR technology.Result of study according to Dai Ke shows that the SCR technology is compared with the automobile of Europe 3 standard levels, can save fuel oil 3～6%, NO
xDischarging can be lower than Europe 4 limit values, as SCR is further optimized, reach Europe 6 limit values also without a doubt.
The external reason of so hankering after the SCR technology mainly is that SCR has lot of advantages, for example, can have 50～85% NO in the scope of 250～550 ℃ of the delivery temperatures of diesel-oil vehicle
xRemove efficient, and can effectively reduce the emission level of PM; SCR can easily satisfy Europe 4 and Europe 5 levels, also has the potentiality that reach Europe 6 levels; Reach the SCR technology that adopt in Europe 4 at present, the fuel oil consumption of motor can reduce by 3～6%; The SCR catalyzer does not contain precious metal, and is more relatively low than cost; SCR is to the quality of fuel oil for vehicles, and particularly Sulpher content is insensitive.Based on above analysis, the SCR post-processing technology is the vehicle condition and the fuel oil for vehicles situation of suitable China also.
If applied the vehicle-mounted SCR post-processing technology in China in 2008, must resolve the vital technological difficulties such as atomized spray, SCR catalyzer conversion efficiency, ammonia amount of leakage of dosage, the carbamide reducing agent of carbamide reducing agent supply, carbamide reducing agent.The premises all relates to the problem of carbamide reducing agent.In these problems, the jet atomization strategy of carbamide reducing agent is a key point.It relates to the problems such as blockage problem, catalyst activity problem, reducing agent efficient, ammonia escape and secondary pollution control of catalyst surface.
For the vehicle of estimating to realize state's 4 dischargings, its motor has been finished the optimization in the machine, NO
xEliminating rate can satisfy state's 4 emission standards, NO 35 ~ 40%
xEliminating rate can satisfy state's 5 emission standards 65 ~ 70%.The SCR after-treatment device just can be used as state's 4 0vehicle marketings only to need to connect upward in the imagination, and the problem of in fact facing is far above this; Adopt the SCR after-treatment device of a whole set of import, cost up to 12000 ~ 15000 yuan/cover, and urea-spray and control section just account for 2500 ~ 4000 yuan, and in case damage, can not guarantee to keep in good repair, must integral replacing, expense user is difficult to bear; But, can only adopt the crucial part of setting up of import urea-spray and control, be equipped with domestic SCR after-treatment device, at this moment, urea-spray and control section just can have been bought with regard to the cost that must spend 3500 ~ 5000 yuan.Urea-spray and control section definitely are the key and the cores of SCR reprocessing complexes.
To marking urea-spray and the control section in the external SCR after-treatment device, technical approach difference that each family adopts, existing independently urea-spray and control section, the transport urea reducing agent is to nozzle then; Also handlebar urea-spray and control section are integrated on the urea reducing agent nozzle, and its purpose all is that the tail gas that provides of timely and appropriate discovery is removed NO
xNeeded carbamide reducing agent.For example, carry out according to the curve A of theoretical discharge rate, or carry out according to the curve B that is lower than theoretical value.
The technology that the needed carbamide reducing agent of tail gas is provided of the timely and appropriate discovery of urea-spray and control section can adopt the accurate electromagnetic mass flowmeter that is connected on the urea pipe to realize, also can adopt accurate Electromagnetic Flow control valve to realize.
In fact, the Electromagnetic Flow control valve that precision is high can be realized the function of accurate electromagnetic mass flowmeter fully.
Accurate electromagnetic mass flowmeter to little range is tested, and relies on the NO in delivery temperature or the tail gas
xLevel is controlled open degree as analog amount, can meet the demands fully, but, the accurate electromagnetic mass flowmeter of present little range 100% is the import product almost, its price is usually about 20000 ~ 30000 yuan/, car load factory and car load user can't bear, the accurate electromagnetic mass flowmeter or the blank spot of homemade little range.In the future also having product emerges.
Electromagnetic Flow control valve to the precision of little range is tested, and relies on the NO in delivery temperature or the tail gas
xLevel is controlled open degree as analog amount, can meet the demands fully, but, the Electromagnetic Flow control valve of the precision of present little range 100% also is the import product almost, its price is usually about 8000 ~ 15000 yuan/, car load factory and car load user can't bear, the Electromagnetic Flow control valve or the blank spot of the precision of homemade little range.Along with the raising of domestic manufacturing industry integral level, the Electromagnetic Flow control valve of the precision of this homemade little range will emerge, and estimates that its price is below 1500 yuan/.
The Electromagnetic Flow control valve that the precision of homemade little range is not too high has a large amount of market supplies, and price is very cheap, about 120 yuan/of average costs.The not too high main cause of Electromagnetic Flow control valve precision of homemade little range is that the material of the critical movements parts of spool is selected and machining accuracy differs bigger abroad together, measured result shows, the trueness error of the flow of the Electromagnetic Flow control valve of homemade little range about ± 30%.
For example, in the urea reducing agent spraying and control of reality, according to control strategy, the flow of carbamide reducing agent changes between 5 ~ 85g/min.Realize control if select a not too high Electromagnetic Flow control valve of homemade precision, the flow of theory setting is 5 ~ 85g/min, the reducing agent supply that needs 60g/min when certain operating mode, according to its error, its real range of flow may reach 42 ~ 78g/min, for the flow of 42g/min, possible result is the supply deficiency of carbamide reducing agent, can't remove the NO of established amount
xAnd for the flow of 78g/min, possible result is that the supply of carbamide reducing agent exceeds standard, though can remove the NO of established amount
x, still, be bound to cause the excessive escape of NH3, form new pollution.
Summary of the invention:
The purpose of this utility model is to provide an a kind of valve two controlled jetting devices of carbamide reducing agent, its series connection electromagnetic flow valve or electromagnetic proportional valve and precision optical machinery switch, reach the purpose of control carbamide reducing agent dosage, can satisfy state's 4 SCR standard-requireds, be unlikely to produce NH again
3The escape amount can be cancelled the DOC device that NH3 is carried out oxidation processes, simplifies vehicle configuration, reduces cost.
The technical solution of the utility model is achieved in thatOne valve, the two controlled jetting devices of carbamide reducing agent, it is characterized in that: carbamide reducing agent case and pipeline and filter are connected in series, filter is connected with the Electromagnetic Flow control valve, at two outlet end of Electromagnetic Flow control valve, two precision optical machinery switch valves respectively in parallel, the precision optical machinery switch valve of an Electromagnetic Flow control valve and an outlet end starts separately respectively, or be pooled to pressure maintaining valve again after starting the precision optical machinery switch valve of two outlet end simultaneously, be transported to urea reducing agent nozzle from pressure maintaining valve then, under air is auxiliary, be ejected in the outlet pipe.
[0018]Good effect of the present utility model is to adopt conventional industrial electro magnetic flow control valve or Electromagnetic Flow Proportional valve and precision optical machinery switch valve, according to different control logics, solved former problem, had very high reliability and use value with carbamide reducing agent dosage.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Embodiment:
Below in conjunction with drawings and Examples the utility model is further described:As shown in Figure 1, one valve, the two controlled jetting devices of carbamide reducing agent, it is characterized in that: carbamide reducing agent case 2 is connected in series with pipeline 1 and filter 9, filter 9 is connected with Electromagnetic Flow control valve 3, in two outlet end of Electromagnetic Flow control valve 3, two precision optical machinery switch valves 4 in parallel respectively and 5, the precision optical machinery switch valve 4 of an Electromagnetic Flow control valve 3 and an outlet end starts separately respectively, or be pooled to pressure maintaining valve 6 again after starting the precision optical machinery switch valve 4 and 5 of two outlet end simultaneously, be transported to urea reducing agent nozzle 10 from pressure maintaining valve 6 then, under air is auxiliary, be ejected in the outlet pipe 12.
Be described with aerodynamic ejecting system so that air is auxiliary, from temperature transducer 7 or NO
xThe signal imitation amount of sensor 8 feeds back to control unit 11, and control unit 11 starts Electromagnetic Flow control valve 3 according to the control logic of setting, and starts precision optical machinery valve 4 respectively, and flow is a; Or precision optical machinery valve 5, flow is b; The dosage level platform of carbamide reducing agent is a or b; Wherein, a＜b; Dosage range is lower than 1 ~ 20ml/min of theory demands amount.The supply dosage of the carbamide reducing agent of small flow in satisfying.
WhenFrom temperature transducer 7 or NO
xThe signal imitation amount of sensor 8 feeds back to control unit 11, and control unit 11 starts Electromagnetic Flow control valve 3 according to the control logic of setting, and starts precision optical machinery valve 4 simultaneously, and flow is a; And precision optical machinery valve 5, flow is b; The dosage level platform of carbamide reducing agent is a+b; Wherein, a＜b; Satisfy the supply dosage of the carbamide reducing agent of big flow.
Select for use homemade component to form system, for example, the precision optical machinery switch valve of plastic material and the precision optical machinery switch valve of stainless steel can both be with being applicable to carbamide reducing agent.
Claims (1)
1. a valve two controlled jetting devices of carbamide reducing agent, it is characterized in that: carbamide reducing agent case and pipeline and filter are connected in series, filter is connected with the Electromagnetic Flow control valve, at two outlet end of Electromagnetic Flow control valve, two precision optical machinery switch valves respectively in parallel, the precision optical machinery switch valve of an Electromagnetic Flow control valve and an outlet end starts separately respectively, or be pooled to pressure maintaining valve again after starting the precision optical machinery switch valve of two outlet end simultaneously, be transported to urea reducing agent nozzle from pressure maintaining valve then, under air is auxiliary, be ejected in the outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205234760U CN201778868U (en) | 2010-09-09 | 2010-09-09 | One-valve double-control jet apparatus for urea reducing agents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205234760U CN201778868U (en) | 2010-09-09 | 2010-09-09 | One-valve double-control jet apparatus for urea reducing agents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201778868U true CN201778868U (en) | 2011-03-30 |
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ID=43792081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205234760U Expired - Fee Related CN201778868U (en) | 2010-09-09 | 2010-09-09 | One-valve double-control jet apparatus for urea reducing agents |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201778868U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840014A (en) * | 2011-06-20 | 2012-12-26 | 杭州银轮科技有限公司 | Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system |
-
2010
- 2010-09-09 CN CN2010205234760U patent/CN201778868U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840014A (en) * | 2011-06-20 | 2012-12-26 | 杭州银轮科技有限公司 | Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20110330 Termination date: 20190909 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |