CN201129202Y - Carbamide reducing reagent nozzle with auxiliary cooling function - Google Patents
Carbamide reducing reagent nozzle with auxiliary cooling function Download PDFInfo
- Publication number
- CN201129202Y CN201129202Y CNU2007200947810U CN200720094781U CN201129202Y CN 201129202 Y CN201129202 Y CN 201129202Y CN U2007200947810 U CNU2007200947810 U CN U2007200947810U CN 200720094781 U CN200720094781 U CN 200720094781U CN 201129202 Y CN201129202 Y CN 201129202Y
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- CN
- China
- Prior art keywords
- nozzle
- reducing agent
- urea
- protection cavity
- scr
- 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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- 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
Abstract
The utility model relates to a urea reductant nozzle with an auxiliary cooling function, which is characterized in that a heat insulation protective cavity of a stainless steel plate with thickness of 1.5-2.5mm is welded to the outside of a precise atomizing nozzle, a gap between the protective cavity and the precise atomizing nozzle is 2mm at the most, the nozzle is the nearest to an engine supercharger, the nozzle is 0.5mm at the least away from the farthest position of an outlet and two lateral faces of the engine supercharger, cooling medium installed in the protective cavity can be tap water, vehicle anti-freeze liquid or air. The urea reductant nozzle can be applied to atomization and injection of urea reductant in on-board SCR post-treatment equipment to resolve coking and blocking problems during urea injection, which has sky-high reliability.
Description
Technical field:
The utility model relates to a kind of urea reducing agent nozzle with auxiliary refrigerating function, is applied to the reprocessing industry of vehicle exhaust.
Background technique:
The automobile post-processing technology comprises SCR (Selective Catalytic Reduction) catalyzed conversion reduction technique at present, 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 great majority are made the merchant and have been begun adamantine employing SCR technology and realize Europe 4 and Europe 5 standards.
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 delivery temperatures
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 atomized spray of carbamide reducing agent is a key point.It relates to the problem of blockage problem, catalyst activity problem, carbamide reducing agent corrosion and the coking and blocking nozzle of catalyst surface.
From the chemical terms analysis, urea is higher than all can decompose more than 250 ℃ in temperature emits ammonia, to realize the removing to NOX.But in fact, before urea is carried in nozzle cavity and is atomized and sprays in the engine exhaust pipe of setting out, or in the moment that breaks away from nozzle, may make the carbamide reducing agent polymerization reaction take place because instantaneous temperature is overheated, generate melamine, a kind of auburn solid chemical compound, the spraying micropore of plug nozzle causes the SCR malfunction alarm, the bright lamp of OBD.The accident that high temperature makes carbamide reducing agent stop up atomizer nozzle takes place in the vehicle road test of engine pedestal and reality often.
Summary of the invention:
The purpose of this utility model is to provide a kind of urea reducing agent nozzle with auxiliary refrigerating function, can be according to the environment and the temperature field of nozzle operation, the appropriate heat insulation and anti-overheated problem of nozzle matrix that solves, on the basis of commercially available binary channel nozzle, the heat insulation cavity of the function that increase is cooled off as medium based on water, cooling liquid or air thoroughly solves the urea reducing agent nozzle problem.
The technical solution of the utility model is achieved in that a kind of urea reducing agent nozzle with auxiliary refrigerating function, it is characterized in that: the corrosion resistant plate thermal insulation protection cavity of a thickness 1.5 ~ 2.5mm that is welded in accurate atomizer nozzle outside, the maximum 2mm in gap between protection cavity and the accurate atomizer nozzle, nozzle are from the engine supercharger outlet the most nearby; Minimum 0.5mm, nozzle is from engine supercharger outlet farthest and two sides; In the protection cavity cooling medium is housed; The cooling medium of protection in the cavity can tap water, automotive antifreezing liquid or air.
In the utility model, in order to prevent the come off carrier duct of blocking catalyst of corrosion products, heat insulation cavity must adopt the stainless steel manufacturing, and plate thickness influences the resistant to heat aging life-span, considers welding procedure, and the corrosion resistant plate of choosing 2.0mm is for best.
Good effect of the present utility model is: eliminate the harm of the coking of carbamide reducing agent to the obstruction of nozzle, improve the reliability of vehicle-mounted SCR system, have practical meaning.
Description of drawings:
Fig. 1 adopts the structure of the heat insulation cavity of liquid cooling for the present invention
Fig. 2 adopts the structure of the heat insulation cavity of air cushion cooling for the present invention
Embodiment:
Below in conjunction with drawings and Examples the utility model is further described: a kind of urea reducing agent nozzle with auxiliary refrigerating function; it is characterized in that: the corrosion resistant plate thermal insulation protection cavity 2 of the thickness 1.5-2.5mm that is welded in accurate atomizer nozzle 1 outside; the maximum 2mm in gap between protection cavity 2 and the accurate atomizer nozzle 1; minimum 0.5mm has tap water, automotive antifreezing liquid or air cooling medium 3 in the protection cavity 2.
Embodiment 1
As shown in Figure 1, the special-purpose urea reducing agent nozzle of a kind of SCR of import, binary channel, body material is a stainless steel, the nozzle micropore diameter is 0.2mm, and plum blossom distributes, and appropriately regulates air pressure and flow and carbamide reducing agent pressure and flow, normal temperature can make carbamide reducing agent form the aerosol of atomizing particle from 0.5 ~ 50 μ m down, effectively promotes the carrying out of the removal NOX main reaction of SCR.
Before this accurate atomizer nozzle 1 is installed in the outlet pipe of automobile, at first according to its structure external form, adopt the corrosion resistant plate of 1.5mm thickness, be welded into a protection cavity 2, this protection cavity 2 is 2mm with the gap biggest place between accurate atomizer nozzle 1 matrix, should be in the gas face of meeting of outlet pipe at accurate atomizer nozzle 1, promptly accurate atomizer nozzle 1 from the engine supercharger outlet the most nearby; Minimum place is 0.5mm; should be in the back of the body gas face of outlet pipe at accurate atomizer nozzle 1; be that accurate atomizer nozzle 1 is from engine supercharger outlet farthest and two sides; the both sides of protection cavity 2 are the Stainless Steel Tube of weld diameter 4mm respectively; adopt tap water or automotive antifreezing liquid to do as cooling medium; regulate flow 5L/min, on the matrix of accurate atomizer nozzle 1, form anti-overheated barrier with this.
This accurate atomizer nozzle 1 is installed in the outlet pipe of automobile, and in the effect of the tail gas of heat, it is overheated that accurate atomizer nozzle 1 matrix does not produce, and the liquid circulation is smooth, and it is constant specifically to be shown as the numerical value that the flow control instrument shows, ripple disable, and system's operation keeps stable.The operation of vehicle driving or motor was opened and inspect after 1000 hours, and the micropore in the outlet port of accurate atomizer nozzle 1 does not have any obstruction.
As shown in Figure 2, the special-purpose urea reducing agent nozzle of a kind of SCR of import, binary channel, body material is a stainless steel, accurate atomizer nozzle 1 micropore diameter is 0.2mm, and plum blossom distributes, and appropriately regulates air pressure and flow and carbamide reducing agent pressure and flow, normal temperature can make carbamide reducing agent form the aerosol of atomizing particle from 0.5 ~ 50 μ m down, effectively promotes the carrying out of the removal NOX main reaction of SCR.
Before this accurate atomizer nozzle is installed in the outlet pipe of automobile, at first according to its structure external form, adopt the corrosion resistant plate of 1.5mm thickness, be welded into a cavity, this protection cavity 2 is 2mm with the gap biggest place between accurate atomizer nozzle 1 matrix, should be in the gas face of meeting of outlet pipe at accurate atomizer nozzle 1, promptly nozzle from the engine supercharger outlet the most nearby; Minimum place is 0.5mm; should be in the back of the body gas face of outlet pipe at accurate atomizer nozzle 1; be that accurate atomizer nozzle 1 is from engine supercharger outlet farthest and two sides; bore the pore of 1 diameter 1mm on the free-air diffuser in the protection cavity 2; impel pressurized air in heat insulation cavity, to reveal naturally; be full of thermal insulation protection cavity 2; and on the wall of the heat insulation cavity of the opposite side of accurate atomizer nozzle 1, bore the spilehole of 1 diameter 0.5mm; pressurized air in the thermal insulation protection cavity 2 is revealed naturally; so the air thermal insulating pad that forms forms anti-overheated barrier on the matrix of accurate atomizer nozzle 1.
This accurate atomizer nozzle 1 is installed in the outlet pipe of automobile, and in the effect of the tail gas of heat, it is overheated that accurate atomizer nozzle 1 matrix does not produce, and the liquid circulation is smooth, specifically is shown as the numerical value ripple disable that the flow control instrument shows, system's operation keeps stable.The operation of vehicle driving or motor was opened and inspect after 1000 hours, and the micropore in the outlet port of accurate atomizer nozzle 1 does not have any obstruction.
Claims (3)
1, a kind of urea reducing agent nozzle with auxiliary refrigerating function; it is characterized in that: a thermal insulation protection cavity (2) is welded in accurate atomizer nozzle (1) outside; the maximum 2mm in gap between protection cavity (2) and the accurate atomizer nozzle (1); minimum 0.5mm has cooling medium (3) in the protection cavity (2).
2, a kind of urea reducing agent nozzle with auxiliary refrigerating function according to claim 1 is characterized in that the cooling medium (3) in the described protection cavity (2) can be tap water, automotive antifreezing liquid or air.
3, a kind of urea reducing agent nozzle with auxiliary refrigerating function according to claim 1 is characterized in that described protection cavity (2) is the corrosion resistant plate of thickness 1.5-2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200947810U CN201129202Y (en) | 2007-12-14 | 2007-12-14 | Carbamide reducing reagent nozzle with auxiliary cooling function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200947810U CN201129202Y (en) | 2007-12-14 | 2007-12-14 | Carbamide reducing reagent nozzle with auxiliary cooling function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201129202Y true CN201129202Y (en) | 2008-10-08 |
Family
ID=40017044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200947810U Expired - Lifetime CN201129202Y (en) | 2007-12-14 | 2007-12-14 | Carbamide reducing reagent nozzle with auxiliary cooling function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201129202Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628391A (en) * | 2011-02-04 | 2012-08-08 | 卡特彼勒公司 | Exhaust system having thermally conductive dosing channel |
| CN102836792A (en) * | 2011-06-20 | 2012-12-26 | 杭州银轮科技有限公司 | Spray nozzle for post-treatment urea SCR (Silicon Controlled Rectifier) system of diesel engine |
-
2007
- 2007-12-14 CN CNU2007200947810U patent/CN201129202Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628391A (en) * | 2011-02-04 | 2012-08-08 | 卡特彼勒公司 | Exhaust system having thermally conductive dosing channel |
| CN102628391B (en) * | 2011-02-04 | 2016-03-02 | 卡特彼勒公司 | There is the vent systems of thermal conductivity measurement channel |
| CN102836792A (en) * | 2011-06-20 | 2012-12-26 | 杭州银轮科技有限公司 | Spray nozzle for post-treatment urea SCR (Silicon Controlled Rectifier) system of diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA FAW CO., LTD. Free format text: FORMER OWNER: CHINESE AUTO GROUP CO NO.1 Effective date: 20111118 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20111118 Address after: 130011 Changchun Province, West New Economic and Technological Development Zone, Dongfeng Street, No. 2259, No. Patentee after: China FAW Group Corporation Address before: 130011 Dongfeng Street, Jilin, Changchun, No. 2259 Patentee before: China FAW Group Corporation |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081008 |