CN203685357U - Integrated type SCR post-processing catalytic converter - Google Patents
Integrated type SCR post-processing catalytic converter Download PDFInfo
- Publication number
- CN203685357U CN203685357U CN201420030945.3U CN201420030945U CN203685357U CN 203685357 U CN203685357 U CN 203685357U CN 201420030945 U CN201420030945 U CN 201420030945U CN 203685357 U CN203685357 U CN 203685357U
- Authority
- CN
- China
- Prior art keywords
- assembly
- air inlet
- nozzle
- scr
- suction tude
- 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 - Fee Related
Links
Images
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model provides an integrated type SCR post-processing catalytic converter which comprises an air inlet pipe assembly connected with an engine exhaust pipe, a nozzle installation assembly connected with a nozzle of a urea injection system and a shell assembly used for loading an SCR carrier, wherein the air inlet pipe assembly is connected with the nozzle assembly to form an air inlet assembly, the shell assembly and the air inlet assembly are connected to form an integrated SCR post-processor, and the air inlet pipe assembly and the exhaust pipe are connected to the SCR post-processor. The integrated type SCR post-processing catalytic converter has the advantages of saving space and being high in product integration level; the flow type of tail gas is changed, the best angle for urea injection carried out by the nozzle is matched, and the atomization effect of urea injection is improved; the crystallization risk of urea solutions is reduced, complexity of an exhaust system is reduced, and meanwhile structure and material cost of a front-segment exhaust pipe body is reduced.
Description
Technical field
The utility model relates to a kind of tail gas treatment system of diesel engine, a kind of integrated form SCR preprocessor being used in conjunction with SCR urea-spray system of special design.
Background technique
Diesel engine is having obvious advantage, particularly CO than petrol engine aspect power character, Economy and reliability
2discharge very lowly, its purposes expands in all kinds of vehicles gradually.But it is that the discharge of nitrogen oxide is serious that diesel engine exists maximum problem.Along with Chinese emission control regulations are more and more stricter, and domestic diesel engine performance and oil product problem, only seem unable to do what one wishes by emission controls by improving combustion measure, be therefore necessary to take the outer after-treatment system of machine to reach emissions object.
SCR technology is the outer post-processing technology of a kind of machine of vehicle diesel engine, can effectively improve the discharge of diesel engine nitrogen oxide, and insensitive to diesel oil sulphur content.This technology by spraying into certain density urea liquid in outlet pipe, there is reduction reaction (reaction 3～5) in ammonia and nitrogen oxide after pyrolysis (reaction 1) and hydrolysis (reaction 2), be water vapour and nitrogen by conversion of nitrogen oxides in reprocessing catalytic converter.
(NH
2)
2CO→NH
3+HNCO (1)
NH
3+HNCO→NH
3+CO
2 (2)
4NO+4NH
3+O
2→4N
2+6H
2O (3)
2NH
3+NO+NO
2→2N
2+3H
2O (4)
6NO
2+8NH
3→7N
2+12H
2O (5)
At present, SCR preprocessor is to make as a whole assembly product to use, and the suction tude assembly of the nozzle mounting unit assembly that SCR preprocessor and SCR urea-spray system are used in conjunction with and SCR preprocessor is because technical reason keeps larger distance always.
Summary of the invention
Problem to be solved in the utility model is that the preprocessor design of SCR system is become and a kind of urea nozzle is integrated in to the product on SCR preprocessor, solved that current SCR preprocessor and nozzle distance are cannot integrated caused front exhaust pipe body cost high, dependence test and the problem such as test is unstable, be convenient to the concentrated supply of material of entirety, and effective use in space.
For solving the problems of the technologies described above, the technological scheme that the invention adopts is: a kind of integrated form SCR reprocessing catalyst, comprise the suction tude assembly being connected with engine exhaust pipe, the nozzle mounting unit assembly being connected with the nozzle of urea-spray system, for loading the housing assembly of SCR carrier, described suction tude assembly and nozzle mounting unit assembly connect into an air inlet assembly, housing assembly and air inlet assembly are linked to be an overall SCR preprocessor, and described suction tude assembly and outlet pipe are connected on SCR preprocessor.
In described scheme, suction tude assembly comprises inner porose suction tude, is arranged on nozzle flange and nozzle fixed tube in described suction tude.
In described scheme, air inlet perforated tube is set in suction tude, described air inlet perforated tube and suction tude form double-layer porous pipe.
In described scheme, the interlaced distribution in hole in hole and suction tude on air inlet perforated tube.
Advantage and the good effect that the utlity model has are: SCR preprocessor of the present utility model, has conserve space, feature that product level of integration is high; Changed the type of flow of tail gas, fit with nozzle is sprayed the best angle of urea, has improved the atomizing effect of urea-spray; Reduce the crystallization risk of urea liquid, reduced the complexity of vent systems, reduced the structure and material cost of front exhaust pipe body simultaneously.
Brief description of the drawings
Fig. 1 is unitary side TV structure schematic diagram of the present utility model
Fig. 2 is that end face of the present utility model is faced structural representation
Fig. 3 is internal structure generalized section of the present utility model
In figure:
1, inlet flange 2, sensor installation seat 1, suction tude
4, air inlet perforated tube 5, nozzle flange 6, nozzle fixed tube
7, shell 8, sensor installation seat 29, mounting bracket
10, outlet pipe
Embodiment
Shown in Fig. 1-3, the utility model is a kind of SCR reprocessing catalyst, comprises the suction tude assembly (comprising inlet flange 1, suction tude 3, sensor installation seat 1 and air inlet perforated tube 4) that is connected with engine exhaust pipe, for loading the cage assembly (comprising shell 7, mounting bracket 9, outlet pipe 10 and sensor installation seat 2 8) of SCR carrier, for the nozzle mounting unit assembly (comprising nozzle flange 5 and nozzle fixed tube 6) of SCR urea nozzle is installed.Be linked to be an overall SCR preprocessor by air inlet assembly, nozzle mounting unit assembly and cage assembly.
SCR preprocessor of the present utility model, has urea nozzle integrated installation on SCR preprocessor, and conserve space, feature that product level of integration is high.Due to nozzle flange 5 and nozzle fixed tube 6 are arranged in suction tude 3, increase the level of integration of product; The profile of suction tude 3 is further optimized, and increase air inlet perforated tube 4, synthesize double-layer porous pipe with suction tude 3, changed the type of flow of tail gas, fit with nozzle is sprayed the best angle of urea, by analysis, atomizing effect can reach more than 95%, through overtesting, discharge meets state's V emission request of SCR preprocessor, has improved the atomizing effect of urea-spray; By the test of 40h stand transient state, there is no obvious crystalline polamer, reduce the crystallization risk of urea liquid.Reduce the complexity of vent systems, reduced the structure and material cost of front exhaust pipe body simultaneously, improve the level of integration of SCR preprocessor, efficiently solved that to reduce the atomizing effect producing poor due to nozzle and shell distance, the risk of the low and crystallization of the uniformity.
The utility model is integrated into nozzle mounting unit assembly on SCR preprocessor, has reduced the cost of front exhaust pipe, has reduced distance different caused atomizing effect and crystallizations etc. different of nozzle and carrier, has reduced test difficulty; Improve the efficiency of product in the time of entrucking; Improve the combination property of product.
Above the embodiment of the invention is had been described in detail, but described content is only for the preferred embodiment of the invention, can not be considered to the practical range for limiting the invention.All equalization variation and improvement etc. of doing according to the invention scope, within all should still belonging to this patent covering scope.
Claims (4)
1. an integrated form SCR reprocessing catalyst, comprise the suction tude assembly being connected with engine exhaust pipe, the nozzle mounting unit assembly being connected with the nozzle of urea-spray system, for loading the housing assembly of SCR carrier, it is characterized in that: described suction tude assembly and nozzle mounting unit assembly connect into an air inlet assembly, housing assembly and air inlet assembly are linked to be an overall SCR preprocessor, and described suction tude assembly and outlet pipe are connected on SCR preprocessor.
2. integrated form SCR reprocessing catalyst according to claim 1, is characterized in that: described suction tude assembly comprises inner porose suction tude, is arranged on nozzle flange and nozzle fixed tube in described suction tude.
3. integrated form SCR reprocessing catalyst according to claim 2, is characterized in that: air inlet perforated tube is set in suction tude, and described air inlet perforated tube and suction tude form double-layer porous pipe.
4. integrated form SCR reprocessing catalyst according to claim 3, is characterized in that: the hole on described air inlet perforated tube and the interlaced distribution in hole in suction tude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420030945.3U CN203685357U (en) | 2014-01-17 | 2014-01-17 | Integrated type SCR post-processing catalytic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420030945.3U CN203685357U (en) | 2014-01-17 | 2014-01-17 | Integrated type SCR post-processing catalytic converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203685357U true CN203685357U (en) | 2014-07-02 |
Family
ID=51007271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420030945.3U Expired - Fee Related CN203685357U (en) | 2014-01-17 | 2014-01-17 | Integrated type SCR post-processing catalytic converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203685357U (en) |
-
2014
- 2014-01-17 CN CN201420030945.3U patent/CN203685357U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2339139B1 (en) | Method for dosing an urea based reducing agent into a gas exhaust stream | |
| US20140314644A1 (en) | Reductant delivery unit for automotive selective catalytic reduction with reducing agent heating | |
| CN205190011U (en) | Cartridge SCR aftertreatment hybrid chamber | |
| CN103046989A (en) | Plug-and-play urea spraying control method and system | |
| EP2339137B1 (en) | Dosing module for dosing an urea based reducing agent into an exhaust gas stream | |
| CN108412593A (en) | A kind of parallel tube type post-processing structural assembly | |
| CN205190012U (en) | Cartridge SCR aftertreatment hybrid chamber | |
| CN205190013U (en) | SCR aftertreatment hybrid chamber | |
| CN107916973B (en) | SCR urea sprays protection system | |
| Qi et al. | Development, application and direction of development of Urea-SCR | |
| CN202926444U (en) | Device and system for correcting selective catalytic reduction (SCR) urea spraying | |
| CN202467984U (en) | Selective catalytic reduction (SCR) catalytic converter for aftertreatment on tail gas of diesel engine | |
| CN207989121U (en) | Exhaust inlet pipe and its exhaust gas post-treatment device | |
| CN108150255B (en) | Treating fluid mixing device for vehicle tail gas treatment | |
| CN203685357U (en) | Integrated type SCR post-processing catalytic converter | |
| JP2009091976A (en) | Exhaust emission control device for internal combustion engine | |
| CN202718734U (en) | Environment friendly tail gas exhaust system | |
| CN102926847B (en) | Selective catalytic reduction urea spouting correction method, device and system | |
| US11753979B2 (en) | Systems and methods for generating ammonia | |
| CN203906052U (en) | Vehicle exhaust after-treatment system | |
| CN203867671U (en) | Ammonia preparation and metering injection system for electrical heating ammonium bicarbonate in dry method | |
| CN102505979B (en) | Connection device and integrated SCR (selective catalytic reduction) catalytic muffler | |
| CN203271879U (en) | SCR postprocessor | |
| CN108979804B (en) | Vehicle SCR system and tail gas heat preservation mixing arrangement thereof | |
| CN203685356U (en) | Ammonium bicarbonate wet-method-ammonia-production and metered-injection system for engine SCR (Selective Catalytic Reduction) |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20190117 |