CN102242660B - Static mixer for automobile exhaust duct - Google Patents
Static mixer for automobile exhaust duct Download PDFInfo
- Publication number
- CN102242660B CN102242660B CN2010101815919A CN201010181591A CN102242660B CN 102242660 B CN102242660 B CN 102242660B CN 2010101815919 A CN2010101815919 A CN 2010101815919A CN 201010181591 A CN201010181591 A CN 201010181591A CN 102242660 B CN102242660 B CN 102242660B
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- CN
- China
- Prior art keywords
- static mixer
- automobile exhaust
- fin
- fins
- mixer
- 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.)
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- 230000003068 static effect Effects 0.000 title claims abstract description 21
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000010963 304 stainless steel Substances 0.000 claims 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract description 10
- 239000004202 carbamide Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract description 3
- 238000010531 catalytic reduction reaction Methods 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 238000000151 deposition Methods 0.000 description 4
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000010205 computational analysis Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a static mixer for an automobile exhaust duct. The static mixer comprises a pipe body, fins and a nozzle. The static mixer is characterized in that: the nozzle is arranged on the pipe body, the sections of the fins are 'V'-shaped, and a plurality of fins with different lengths is alternately and radically arranged in the pipe body. Gas disturbance can be effectively increased by adopting the 'V'-shaped fins, so that waste gas and urea are in full turbulent mixing through the mixer, achieve relatively high uniformity before entering a selective catalytic reduction (SCR) catalyst and further are fully reacted to reduce the NOx content of the automobile exhaust. The fins with different lengths are arranged across, so that different structures of the fins can be used for strengthening disturbance, and pressure drop caused by the middle material part can be reduced. By calculation and analysis of FIR special design software of automatic vehicle location (AVL), the mixer of the structure has good mixing effect and low exhaust back pressure, and fulfills the purposes of fully mixing the jet urea and the jet tail gas without generating high pressure drop.
Description
Technical field
The invention belongs to the automobile exhaust system field, relate in particular a kind of automobile exhaust pipeline static mixer.
Background technique
At present, the application of pipeline static mixer on automobile is more and more extensive, has now become the mixing situation of improving urea water 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 as much as possible the NOx discharging.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 than the urea of high uniformity and the mixer of tail gas, could in the SCR catalyst converter, react fully, and then reduce the discharge amount of NOx.But, arrange mixer usually and reduce exhaust resistance to contradict that the i.e. setting of mixer is more, the exhaust back pressure of vent systems is just larger, and corresponding effective engine power consume is also just 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 present invention will solve is the problems referred to above that prior art exists, and aims to provide a kind ofly for the static mixer in the automobile exhaust pipeline, not only can so that the urea water of nozzle ejection and tail gas are mixed fully, can not produce very large pressure drop again.
In order to address the above problem, the technological scheme that this patent adopts is:
A kind of automobile exhaust pipeline static mixer, comprise body, fin and nozzle, it is characterized in that described nozzle is arranged on the body, described fin comprises long fin and short wing panels, each fin cross section is " V " font, and a plurality of fins radially are arranged in the body by the mode that long fin and short wing panels replace.
The present invention adopts " V " font fin, can effectively increase the gas disturbance, obtain abundant disturbance after making waste gas and urea by mixer and mix, before entering the SCR catalyst converter, obtain higher uniformity, and then react fully, to reduce the content of NOx in the vehicle exhaust.Adopt the different fin intercross arrangement of length, both can utilize its different structure to strengthen disturbance, can reduce the pressure drop that medium material partly causes again.Through the computational analysis of the FIRE of AVL special designs software, the mixer good mixing effect of this structure, exhaust back pressure is little, has both reached so that the urea that sprays and tail gas are mixed fully, can not produce the purpose of very large pressure drop.
According to the present invention, 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 present invention can link to each other with exhaust duct by dismountable mode.
According to the present invention, described nozzle is arranged on the downstream of fin.Under low temperature condition, urea liquid deposits easily, and nozzle is arranged on the mixer back, has avoided depositing at 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 present invention, described fin is made by steel plate bending is angled, is fixed by welding on the body, and the other end is unsettled.
According to the present invention, " V " shape angle of described fin is 30 degree-70 degree, preferred 30 degree-45 degree, more preferably 30 degree or 45 degree.Being advisable with the 6-10 sheet of described fin, preferred 8.
According to the present invention, the body of described mixer 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
The below contrasts accompanying drawing, by the description to embodiment, to the embodiment of this patent, such as: the effect of the 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:
A kind of automobile exhaust pipeline static mixer of this patent, utilize cross one another fin with certain subtended angle, obtaining abundant disturbance after making 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 vehicle exhaust.
As described in accompanying drawing 2, a kind of automobile exhaust pipeline static mixer of the present invention, 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 comprises long fin 32 and short wing panels 31, each fin cross section is " V " font, and a plurality of fins 3 radially are arranged in the body 2 by the mode that long fin 32 and short wing panels 31 replace.
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 fin 3.
Described fin 3 is made by steel plate bending is angled, and by welding on the inwall that evenly is fixed on body 2, the other end is unsettled.The subtended angle of described fin 3 is used for enlarging the intensity of disturbance.Can carry out suitable modification to subtended angle according to desired pressure drop and strength of turbulence, simple and easy to do.Preferred 30 degree or 45 degree, quantity is 8.
Described body 2 adopts 304 above stainless steel materials making, avoids under the high temperature mixer to avoiding the corrosive action of material.
Above-mentionedly by reference to the accompanying drawings the present invention has been carried out exemplary description, but specific implementation of the present invention is not subjected to the restriction of aforesaid way.As long as adopted the improvement of the various unsubstantialities that design of the present invention and technological scheme carry out, or without improving design of the present invention and technological scheme are directly applied to other occasion, all within protection scope of the present invention.
Adopt technological scheme of the present invention, not only can so that the urea water of nozzle ejection and tail gas are mixed fully, can not produce very large pressure drop again.
Claims (10)
1. automobile exhaust pipeline static mixer, 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) comprises long fin (32) and short wing panels (31), each fin cross section is " V " font, and a plurality of fins (3) radially are arranged in the body (2) by the mode that long fin (32) and short wing panels (31) replace.
2. automobile exhaust pipeline static mixer as claimed in claim 1 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. automobile exhaust pipeline static mixer as claimed in claim 1 is characterized in that described nozzle (4) is arranged on the downstream of fin (3).
4. automobile exhaust pipeline static mixer as claimed in claim 1 is characterized in that described fin (3) makes by steel plate bending is angled, is fixed by welding on the body (2), and the other end is unsettled.
5. automobile exhaust pipeline static mixer as claimed in claim 4, " V " shape angle that it is characterized in that described fin (3) are 30 degree-70 degree.
6. automobile exhaust pipeline static mixer as claimed in claim 5, " V " shape angle that it is characterized in that described fin (3) are 30 degree-45 degree.
7. automobile exhaust pipeline static mixer as claimed in claim 6, " V " shape angle that it is characterized in that described fin (3) are 30 degree or 45 degree.
8. automobile exhaust pipeline static mixer as claimed in claim 4 is characterized in that described fin (3) is the 6-10 sheet.
9. automobile exhaust pipeline static mixer as claimed in claim 8 is characterized in that described fin (3) is 8.
10. such as any one described automobile exhaust pipeline static mixer of claim 1-9, it is characterized in that described body (2) adopts 304 stainless steel materials to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101815919A CN102242660B (en) | 2010-05-10 | 2010-05-10 | Static mixer for automobile exhaust duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101815919A CN102242660B (en) | 2010-05-10 | 2010-05-10 | Static mixer for automobile exhaust duct |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102242660A CN102242660A (en) | 2011-11-16 |
| CN102242660B true CN102242660B (en) | 2013-02-13 |
Family
ID=44960880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101815919A Active CN102242660B (en) | 2010-05-10 | 2010-05-10 | Static mixer for automobile exhaust duct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102242660B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911372B (en) * | 2015-07-05 | 2017-05-17 | 贵州大学 | Pre-treatment method for micro-disseminated type refractory primary gold ore |
| CN106799173A (en) * | 2016-12-16 | 2017-06-06 | 芜湖万向新元环保科技有限公司 | A kind of gas mixing static mixer |
| CN108686531B (en) * | 2018-06-29 | 2024-04-05 | 东风商用车有限公司 | Simplified shell-and-tube fluid mixer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1370255A (en) * | 1999-08-17 | 2002-09-18 | 排放技术有限公司 | Mixer element for fluid that is guided in pipe |
| TWI279251B (en) * | 2005-12-15 | 2007-04-21 | Swancor Ind Co Ltd | Static mixer |
| CN201687556U (en) * | 2010-05-10 | 2010-12-29 | 杭州银轮科技有限公司 | Static mixer for automobile exhaust pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8459017B2 (en) * | 2008-04-09 | 2013-06-11 | Woodward, Inc. | Low pressure drop mixer for radial mixing of internal combustion engine exhaust flows, combustor incorporating same, and methods of mixing |
| US20100110826A1 (en) * | 2008-11-06 | 2010-05-06 | D Herde Eric J | Fractal static mixer |
-
2010
- 2010-05-10 CN CN2010101815919A patent/CN102242660B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1370255A (en) * | 1999-08-17 | 2002-09-18 | 排放技术有限公司 | Mixer element for fluid that is guided in pipe |
| TWI279251B (en) * | 2005-12-15 | 2007-04-21 | Swancor Ind Co Ltd | Static mixer |
| CN201687556U (en) * | 2010-05-10 | 2010-12-29 | 杭州银轮科技有限公司 | Static mixer for automobile exhaust pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102242660A (en) | 2011-11-16 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A static mixer for automobile exhaust pipe Effective date of registration: 20210610 Granted publication date: 20130213 Pledgee: Bank of China Limited by Share Ltd. Tiantai County branch Pledgor: ZHEJIANG YINLUN MACHINERY Co.,Ltd. Registration number: Y2021330000510 |
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Date of cancellation: 20220627 Granted publication date: 20130213 Pledgee: Bank of China Limited by Share Ltd. Tiantai County branch Pledgor: ZHEJIANG YINLUN MACHINERY Co.,Ltd. Registration number: Y2021330000510 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |