CN202645690U - Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure thereof - Google Patents
Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure thereof Download PDFInfo
- Publication number
- CN202645690U CN202645690U CN2012203193036U CN201220319303U CN202645690U CN 202645690 U CN202645690 U CN 202645690U CN 2012203193036 U CN2012203193036 U CN 2012203193036U CN 201220319303 U CN201220319303 U CN 201220319303U CN 202645690 U CN202645690 U CN 202645690U
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- nozzle
- straight tube
- urea
- scr
- hole
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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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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a urea nozzle of an SCR (Selective Catalytic Reduction) system. The urea nozzle of SCR system comprises a nozzle joint, a nozzle straight tube and a nozzle spray head, wherein the nozzle joint is of a column shape, the lower part of the nozzle joint is thick and the upper part of the nozzle joint is thin, and a through hole is formed in the nozzle joint; the nozzle straight tube is of the column shape, the through hole is formed in the nozzle straight tube, one end of the nozzle straight tube is inserted into the nozzle joint, and the other end of the nozzle straight tube is inserted into the nozzle spray head; and the nozzle spray head is of a hopper shape, a step hole is formed in the nozzle spray head, the outlet of the step hole is at least one micro hole formed in the bottom of a column body with a smaller diameter, and the nozzle spray head is sleeved at the other end of the nozzle straight tube through the step hole in the nozzle spray head. The nozzle spray head is fixed at the lower end of a fastening nut, and the fastening nut is screwed on a mounting seat fixed on an automobile exhaust tube. Urea water solution is mixed with high pressure air and exhausted from the micro holes, and enters a catalyst to conduct chemical reactions with components such as nitric oxide and the like. The urea nozzle of the SCR system and a mounting structure of the urea nozzle of the SCR system have the advantages of high atomization quality, low air consumption rate, few radiation quantity of heat, and simple and reliable supply system.
Description
Technical field
The utility model relates to the diesel automobile exhaust processing technology field, particularly relates to the urea nozzle of a kind of SCR system, and the utility model also relates to the mounting structure of urea nozzle.
Background technique
Selective Catalytic Reduction selective catalytic reduction is called for short SCR, SCR refers to be installed in the diesel engine automobile air exhausting system, NOx in the diesel emission is catalysed and reduced into the catalytic reduction device of N2 and H2O, selects aqueous solution of urea as reducing agent.Aqueous solution of urea is ejected in the outlet pipe of catalyzer upstream, and gasification is decomposed into CO2 and ammonia under the effect of exhaust gas temperature 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 engine operating condition situation quantitative injection, so the logic control circuit of quantitative injection unit is connected with control unit of engine.The working efficiency of SCR depends on gas temperature, if 200 ℃ to 500 ℃ temperature work, it is most effective to reach 95%, and the operational condition of actual vehicle can reach this requirement.So the SCR technology can satisfy state's IV, state's V emission regulation demands fully.
The SCR system mainly is comprised of urea box, urea pump (urea supply unit), urea nozzle, catalytic muffler, urea pipe and control unit etc., as shown in Figure 1.
The working principle of SCR is that reducing agent (ammoniacal liquor, urea etc.) is sprayed in the outlet pipe, under the effect of catalyzer, reduction of nitrogen oxide is become nitrogen, to reach the purpose that reduces discharged nitrous oxides.The reducing agent fogging degree that sprays in the outlet pipe is higher, and its response area is large, reacts more abundant, and reduction effect is better.The atomizing effect of reducing agent is the core of SCR, and the performance of atomizer nozzle determines the quality of atomizing effect.
The model utility content
Technical problem to be solved in the utility model is a kind of air atomizer spray nozzle of designing for above-mentioned SCR technology, and this nozzle interior is porose, and the outlet in hole is the micropore of opening on the least significant end circumferential surface.Pass into aqueous solution of urea in the nozzle and pass into simultaneously high-pressure air, utilize the effect of sending forth of high-pressure air, carrying aqueous solution of urea secretly with higher speed and spraying from micropore, make the liquid atomization and be thinner drop.Air atomizer spray nozzle has the advantages such as atomization quality is high, the gas consumption rate is low, radiations heat energy is few, supply system is simple and reliable.Nozzle mounting points of the present utility model is no less than in the 200mm scope apart from the catalytic muffler entry end.
The technical problem that the utility model requires to solve can be achieved through the following technical solutions:
The urea nozzle of a kind of SCR system comprises nozzle connection, nozzle straight tube, spray-nozzle type sprinkler head, and described nozzle connection is column, and the bottom is thicker than top, and there is a circle projection position, intermediate portion, and there is through hole described nozzle connection inside, and the aperture, bottom is greater than the aperture of epimere part; Described nozzle straight tube is column, and there is through hole inside, and described nozzle straight tube one end is inserted in that larger sector hole of aperture, nozzle connection bottom; Described spray-nozzle type sprinkler head is funnel-like, formed by the larger cylinder of upper diameter, diameter is less bottom cylinder and one section round platform connecting two cylinders, there is a circle boss the top of the cylinder that diameter is larger, described spray-nozzle type sprinkler head inside is shoulder hole, the outlet of described shoulder hole is at least one micropore that open the less cylinder bottom of diameter, and described spray-nozzle type sprinkler head is by the other end of inner step borehole jack at the nozzle straight tube.
Described micro-pore diameter is 0.3mm-1.0mm.
A part of described nozzle connection, nozzle straight tube being connected with spray-nozzle type sprinkler head adopts soldering or laser beam welding to connect.
Described urea nozzle is installed on the inclined-plane of vehicle exhaust pipeline, in the scope of catalyst converter entrance more than or equal to 200mm of described urea nozzle apart from the SCR system.
Owing to having adopted as above technological scheme, having the utlity model has following features: have the advantages such as atomization quality is high, the gas consumption rate is low, radiations heat energy is few, supply system is simple and reliable.
Description of drawings
Fig. 1 is the SCR system block diagram.
Fig. 2 is structural drawing of the present utility model.
Fig. 3 is the utility model nozzle connection sectional view.
Fig. 4 is the utility model nozzle straight tube sectional view.
Fig. 5 is the utility model spray-nozzle type sprinkler head sectional view.
Fig. 6 is the utility model spray-nozzle type sprinkler head tightening nut sectional view.
Fig. 7 is that the utility model spray-nozzle type sprinkler head mounting base is partly cutd open figure.
Fig. 8 is the utility model mounting structure schematic diagram.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 2, the utility model comprises nozzle connection 100, nozzle straight tube 200, spray-nozzle type sprinkler head 500, the structure of the utility model nozzle connection 100, nozzle straight tube 200, spray-nozzle type sprinkler head 500 such as Fig. 3, Fig. 4, Fig. 5, shown in Figure 6.Nozzle connection 100 is up-thin-low-thick column structure, and there is through hole inside, and pore structure also is up-thin-low-thick.Nozzle straight tube 200 is straight column structure, and also there is through hole inside.Spray-nozzle type sprinkler head 500 is funnel-shaped structure, and there is shoulder hole inside, and the outlet of shoulder hole is the bottom micropore of bottom of spray-nozzle type sprinkler head 500, and the micropore of the present embodiment has three, and the diameter of micropore is in the scope of 0.3mm-1.0mm.Nozzle straight tube 200 1 ends are inserted in the nozzle connection 100, and the other end is inserted in the spray-nozzle type sprinkler head 500.Above-mentioned each assembly connects by the mode of soldering or laser beam welding.
Mounting structure of the present utility model as shown in Figure 9, spray-nozzle type sprinkler head 500 is fixed on tightening nut 300 bottoms, tightening nut 300 is spun on the mounting base 400 by screw thread.The structure of tightening nut 300 and mounting base 400 is respectively such as Fig. 7, shown in Figure 8.
Aqueous solution of urea and high-pressure air are passed into nozzle interior, utilize the effect of sending forth of high-pressure air, are carrying aqueous solution of urea secretly with higher speed and are spraying from micropore, enter catalyst converter, and the tail gas that diesel car is discharged reduces.
Above demonstration and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; 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 changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. the urea nozzle of a SCR system is characterized in that, comprises nozzle connection, nozzle straight tube, spray-nozzle type sprinkler head, described nozzle connection is column, and the bottom is thicker than top, and there is a circle projection position, intermediate portion, there is through hole described nozzle connection inside, and the aperture, bottom is greater than the aperture of epimere part; Described nozzle straight tube is column, and there is through hole inside, and described nozzle straight tube one end is inserted in that larger sector hole of aperture, nozzle connection bottom; Described spray-nozzle type sprinkler head is funnel-like, formed by the larger cylinder of upper diameter, diameter is less bottom cylinder and one section round platform connecting two cylinders, there is a circle boss the top of the cylinder that diameter is larger, described spray-nozzle type sprinkler head inside is shoulder hole, the outlet of described shoulder hole is at least one micropore that open the less cylinder bottom of diameter, and described spray-nozzle type sprinkler head is by the other end of inner step borehole jack at the nozzle straight tube.
2. the urea nozzle of SCR as claimed in claim 1 system is characterized in that, described micro-pore diameter is 0.3mm-1.0mm.
3. the urea nozzle of SCR as claimed in claim 1 or 2 system is characterized in that, described nozzle connection, nozzle straight tube are connected a part and are adopted soldering or laser beam welding to connect with spray-nozzle type sprinkler head.
4. the mounting structure of the urea nozzle of a SCR as claimed in claim 1 system is characterized in that, described urea nozzle is installed on the inclined-plane of vehicle exhaust pipeline, in the scope of catalyst converter entrance more than or equal to 200mm of described urea nozzle apart from the SCR system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203193036U CN202645690U (en) | 2012-07-03 | 2012-07-03 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203193036U CN202645690U (en) | 2012-07-03 | 2012-07-03 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202645690U true CN202645690U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203193036U Expired - Lifetime CN202645690U (en) | 2012-07-03 | 2012-07-03 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202645690U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748106A (en) * | 2012-07-03 | 2012-10-24 | 安徽艾可蓝节能环保科技有限公司 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure of urea nozzle |
| CN105604654A (en) * | 2015-12-25 | 2016-05-25 | 潍柴动力股份有限公司 | Urea nozzle seat and nozzle device |
-
2012
- 2012-07-03 CN CN2012203193036U patent/CN202645690U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748106A (en) * | 2012-07-03 | 2012-10-24 | 安徽艾可蓝节能环保科技有限公司 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure of urea nozzle |
| CN105604654A (en) * | 2015-12-25 | 2016-05-25 | 潍柴动力股份有限公司 | Urea nozzle seat and nozzle device |
| CN105604654B (en) * | 2015-12-25 | 2018-08-07 | 潍柴动力股份有限公司 | A kind of urea nozzle seat and spray nozzle device |
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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: ANHUI ACT-BLUE ENVIRONMENTAL PROTECTION Co.,Ltd. Address before: 247000 Guichi Industrial Park, Anhui, Chizhou Patentee before: Anhui Aikelan environmental protection Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
|
| CX01 | Expiry of patent term |