CN201687557U - Static mixer of SCR denitration system - Google Patents
Static mixer of SCR denitration system Download PDFInfo
- Publication number
- CN201687557U CN201687557U CN2010201987395U CN201020198739U CN201687557U CN 201687557 U CN201687557 U CN 201687557U CN 2010201987395 U CN2010201987395 U CN 2010201987395U CN 201020198739 U CN201020198739 U CN 201020198739U CN 201687557 U CN201687557 U CN 201687557U
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- static mixer
- mixer
- vanes
- degree
- nozzle
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a static mixer of an SCR denitration system. The mixer comprises a pipe body, a plurality of vanes and a nozzle, and is characterized in that the nozzle is arranged on the pipe body; the vanes comprises long vane and short vanes; the section of each vane is V-shaped; and the long vanes and the short vanes are radially arranged in the pipe body alternatively; the utility model adopts the eccentrically-arranged V-shaped vanes, so that vortex flow capable of increasing disturbance can be formed in the middle of the pipe of the mixer; According to the calculated and analysis results of FIRE special design software for AVL, the mixer adopting the structure has small exhaust back pressure and achieves the purposes of fully mixture of ejected carbamide and tail gas and small pressure reduction.
Description
Technical field
The utility model patent relates to the automobile exhaust system field, relates to a kind of automobile exhaust pipeline static mixer in particular.
Background technique
At present, the application of pipeline static mixer on automobile more and more widely now become the mixing situation of improving urea and tail gas, reduces a kind of development trend of NOx discharging.In general, present vent systems all requires under the prerequisite that satisfies exhaust back pressure and not loss effective engine power, reduces the NOx discharging as much as possible.Therefore, present automobile exhaust system all requires urea water and tail gas can access sufficient mixing before entering the SCR catalyst converter, because only have the mixer of higher inhomogeneity urea and tail gas, could in the SCR catalyst converter, react fully, and then reduce the discharge amount of NOx.But, arrange that mixer contradicts with the reduction exhaust resistance usually, i.e. the setting of mixer is many more, and the exhaust back pressure of vent systems is just big more, and corresponding effective engine power consume is also just many more.And if do not adopt certain mixer, urea and tail gas are fully mixed before entering the SCR catalyst converter, reach the purpose that significantly reduces NOx.
Summary of the invention
The utility model patent is at there being the fluid retention district behind the conventional static mixer in the prior art, the disturbance effect is relatively poor, the mixed effect of tail gas and urea is relatively poor, CONCENTRATION DISTRIBUTION is inhomogeneous, cause all unfavorable shortcoming of conversion ratio and the escaping of ammonia rate, aimed to provide a kind of static mixer of SCR denitrating system, not only can not produce very big pressure drop again so that the urea and the tail gas that spray are mixed fully.
The technological scheme that addresses the above problem employing is: a kind of static mixer of SCR denitrating system, comprise body, fin and nozzle, it is characterized in that described nozzle is arranged on the body, described fin cross section is " V " font, and a plurality of fins are eccentrically set in the body.
The utility model adopts " V " font fin, and the multi-disc fin adopts arranged off-centre, makes to form eddy current in the middle of the mixer pipeline, increases disturbance.Through the computational analysis of the FIRE of AVL special designs software, the mixer exhaust back pressure of this structure is little, reaches both to make that the urea and the tail gas that spray are mixed fully, can not produce the purpose of very big pressure drop.
According to the utility model, described body one end links to each other with exhaust duct by adpting flange, and the other end links to each other with rear end pipeline or catalyst converter.Thereby the utility model can link to each other with exhaust duct by dismountable mode.
According to the utility model, described nozzle is arranged on the downstream of body.Under low temperature condition, urea liquid deposits easily, and nozzle is arranged on the mixer back, has avoided depositing on mixer, stops up the problem of exhaust duct.Nozzle location is located at the flow-disturbing active region, can allow urea and tail gas mix fully, reduces deposition.
According to the utility model, described fin is bent into several angle by steel plate and makes, and is fixed by welding on the body, and the other end is unsettled.
According to the utility model, " V " shape angle of described fin is 30 degree-70 degree, preferred 30 degree-45 degree, more preferably 30 degree or 45 degree.
Described mixer body adopts 304 above stainless steel materials to make.
Description of drawings
Fig. 1 is the automotive exhaust system structure schematic representation.
Be labeled as among the figure: 1, adpting flange; 2, body; 3, mixer fin; 4, nozzle; 5, mixer rear end pipeline; 6, catalyst converter; 7, catalyst carrier; 8, pipeline behind the catalyst converter; 9, adpting flange; 10, adpting flange.
Fig. 2 is the mixer front view;
Fig. 3 is the mixer plan view;
Fig. 4 is the front view of mixer fin.
Embodiment
Contrast accompanying drawing below, by description to embodiment, to the embodiment of the utility model patent, for example: the effect of mutual alignment relation between the shape of each structure, structure and the each several part and annexation, each several part and working principle etc. are done further detailed explanation:
The static mixer of a kind of SCR denitrating system of the utility model patent, obtaining abundant disturbance after utilizing waste gas and urea by mixer mixes, before entering the SCR catalyst converter, obtain higher uniformity, and then react fully, to reduce the content of NOx in the exhaust.
As described in accompanying drawing 2, the static mixer of SCR denitrating system of the present utility model, the static mixer of SCR denitrating system, comprise body 2, fin 3 and nozzle 4, described nozzle 4 is arranged on the body 2, and described fin 3 cross sections are " V " font, and a plurality of fins 3 are eccentrically set in the body 2.
Described body 2 two ends link to each other with rear end pipeline 5 with exhaust duct by adpting flange 1,9 respectively.Described nozzle 4 is arranged on the downstream of body 3.
Described fin 3 is bent into several angle by steel plate and makes, and is fixed by welding on the body 2, and the other end is unsettled." V " shape angle of described fin 3 is 30 degree or 45 degree.
Described body 2 adopts 304 above stainless steel materials to make.
Above-mentionedly in conjunction with the accompanying drawings the utility model patent has been carried out exemplary description, but the specific implementation of the utility model patent is not subjected to the restriction of aforesaid way.As long as adopted the design of the utility model patent and the improvement of the various unsubstantialities that technological scheme is carried out; or the design of the utility model patent and technological scheme are directly applied to other occasion without improving, all within the protection domain of the utility model patent.
Adopt the technological scheme of the utility model patent, not only can not produce very big pressure drop again so that the urea water of nozzle ejection and tail gas are mixed fully.
Claims (8)
1. the static mixer of a SCR denitrating system, comprise body (2), fin (3) and nozzle (4), it is characterized in that described nozzle (4) is arranged on the body (2), described fin (3) cross section is " V " font, and a plurality of fins (3) are eccentrically set in the body (2).
2. as the static mixer of right 1 described a kind of SCR denitrating system, it is characterized in that described body (2) two ends link to each other with rear end pipeline (5) or catalyst converter (6) with exhaust duct by adpting flange (1,9) respectively.
3. as the static mixer of right 1 described a kind of SCR denitrating system, it is characterized in that described nozzle (4) is arranged on the downstream of body (3).
4. as the static mixer of right 1 described a kind of SCR denitrating system, it is characterized in that described fin (3) is bent into several angle by steel plate and makes, be fixed by welding on the body (2) that the other end is unsettled.
5. as the static mixer of right 4 described a kind of SCR denitrating systems, " V " shape angle that it is characterized in that described fin (3) is 30 degree-70 degree.
6. as the static mixer of right 5 described a kind of SCR denitrating systems, " V " shape angle that it is characterized in that described fin (3) is 30 degree-45 degree.
7. as the static mixer of right 6 described a kind of SCR denitrating systems, " V " shape angle that it is characterized in that described fin (3) is 30 degree or 45 degree.
8. as the static mixer of any one described a kind of SCR denitrating system of right 1-7, it is characterized in that described body (2) adopts 304 above stainless steel materials to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201987395U CN201687557U (en) | 2010-05-10 | 2010-05-10 | Static mixer of SCR denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201987395U CN201687557U (en) | 2010-05-10 | 2010-05-10 | Static mixer of SCR denitration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201687557U true CN201687557U (en) | 2010-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201987395U Expired - Lifetime CN201687557U (en) | 2010-05-10 | 2010-05-10 | Static mixer of SCR denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201687557U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242662A (en) * | 2010-05-10 | 2011-11-16 | 杭州银轮科技有限公司 | Static mixer of selective catalytic reduction (SCR) denitration system |
| CN107842413A (en) * | 2016-09-18 | 2018-03-27 | 陕西重型汽车有限公司 | A kind of automobile-used swirl-flow devices and the automotive SCR system that the swirl-flow devices are set |
| CN111742122A (en) * | 2018-02-20 | 2020-10-02 | 五十铃自动车株式会社 | Reducing agent injection device |
-
2010
- 2010-05-10 CN CN2010201987395U patent/CN201687557U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242662A (en) * | 2010-05-10 | 2011-11-16 | 杭州银轮科技有限公司 | Static mixer of selective catalytic reduction (SCR) denitration system |
| CN102242662B (en) * | 2010-05-10 | 2012-12-19 | 杭州银轮科技有限公司 | Static mixer of selective catalytic reduction (SCR) denitration system |
| CN107842413A (en) * | 2016-09-18 | 2018-03-27 | 陕西重型汽车有限公司 | A kind of automobile-used swirl-flow devices and the automotive SCR system that the swirl-flow devices are set |
| CN111742122A (en) * | 2018-02-20 | 2020-10-02 | 五十铃自动车株式会社 | Reducing agent injection device |
| CN111742122B (en) * | 2018-02-20 | 2022-04-01 | 五十铃自动车株式会社 | Reducing agent injection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101229 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |