CN102242662B - Static mixer of selective catalytic reduction (SCR) denitration system - Google Patents
Static mixer of selective catalytic reduction (SCR) denitration system Download PDFInfo
- Publication number
- CN102242662B CN102242662B CN2010101817223A CN201010181722A CN102242662B CN 102242662 B CN102242662 B CN 102242662B CN 2010101817223 A CN2010101817223 A CN 2010101817223A CN 201010181722 A CN201010181722 A CN 201010181722A CN 102242662 B CN102242662 B CN 102242662B
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- static mixer
- mixer
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- fin
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- 230000003068 static effect Effects 0.000 title claims abstract description 21
- 238000010531 catalytic reduction reaction Methods 0.000 title abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 239000003054 catalyst Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000010963 304 stainless steel Substances 0.000 claims description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 2
- 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
- 239000007789 gas Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Classifications
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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
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a static mixer of a selective catalytic reduction (SCR) denitration system. 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 section of each fin is 'V'-shaped, and a plurality of fins are radically arranged in the pipe body, and the fins are made by curving the steel plates into a certain angle. The 'V'-shaped fins are adopted in the static mixer, and the plurality of fins are eccentrically arranged, so that vortex is formed in the pipeline of the mixer to increase disturbance. By calculation and analysis of FIR special design software of automatic vehicle location (AVL), the mixer of the structure has 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
Patent of the present invention 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 become the mix of improving urea and tail gas at present, 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 before getting into the SCR catalyst converter, can access sufficient mixing; 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 getting into the SCR catalyst converter, reach the purpose that significantly reduces NOx.
Summary of the invention
Patent of the present invention is to having the fluid retention district behind the conventional static mixer in the existing technology; The disturbance effect is relatively poor, and the mixed effect of tail gas and urea is relatively poor, and 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; Described fin is bent into several angle by steel plate and processes, and is fixed by welding on the body, and the other end is unsettled.
The present invention adopts " V " font fin, and the multi-disc fin adopts arranged off-centre, makes in the middle of the mixer pipeline, to form eddy current, increases disturbance.Analyze through the FIRE of AVL special designs computed in 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 present invention, described body one end links to each other with exhaust duct through 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 through dismountable mode.
According to the present invention, described nozzle is arranged on the downstream of fin.Under low temperature condition, urea liquid deposits easily, is arranged on the mixer back to nozzle, has avoided on mixer, depositing, and stops up the problem of exhaust duct.Nozzle location is located at the flow-disturbing active region, can let urea and tail gas mix fully, reduces deposition.
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.
Said mixer body adopts 304 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; Through description to embodiment; To the embodiment of patent of the present invention, 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 patent of the present invention obtains abundant disturbance after utilizing waste gas and urea through mixer and mixes, and before getting into the SCR catalyst converter, obtains higher uniformity, and then reacts fully, to reduce the content of NOx in the exhaust.
Of accompanying drawing 2, the static mixer of SCR denitrating system of the present invention, 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 through adpting flange 1,9 respectively.Described nozzle 4 is arranged on the downstream of fin 3.
Described fin 3 is bent into several angle by steel plate and processes, 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.
Said body 2 adopts 304 above stainless steel materials to make.
The above-mentioned accompanying drawing that combines has carried out exemplary description to patent of the present invention, but the concrete realization of patent of the present invention does not receive the restriction of aforesaid way.As long as adopted the design of patent of the present invention and the improvement of the various unsubstantialities that technological scheme is carried out, or the design of patent of the present invention and technological scheme are directly applied to other occasion, all within the protection domain of patent of the present invention without improving.
Adopt the technological scheme of patent of the present invention, 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 (7)
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); Described fin (3) is bent into several angle by steel plate and processes, and is fixed by welding on the body (2), and the other end is unsettled.
2. the static mixer of a kind of SCR denitrating system 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 through adpting flange (1,9) respectively.
3. the static mixer of a kind of SCR denitrating system as claimed in claim 1 is characterized in that described nozzle (4) is arranged on the downstream of fin (3).
4. the static mixer of a kind of SCR denitrating system as claimed in claim 1, " V " shape angle that it is characterized in that described fin (3) are 30 degree-70 degree.
5. the static mixer of a kind of SCR denitrating system as claimed in claim 4, " V " shape angle that it is characterized in that described fin (3) are 30 degree-45 degree.
6. the static mixer of a kind of SCR denitrating system as claimed in claim 5, " V " shape angle that it is characterized in that described fin (3) are 30 degree or 45 degree.
7. like the static mixer of any one described a kind of SCR denitrating system of claim 1-6, it is characterized in that said body (2) adopts 304 stainless steel materials to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101817223A CN102242662B (en) | 2010-05-10 | 2010-05-10 | Static mixer of selective catalytic reduction (SCR) denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101817223A CN102242662B (en) | 2010-05-10 | 2010-05-10 | Static mixer of selective catalytic reduction (SCR) denitration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102242662A CN102242662A (en) | 2011-11-16 |
| CN102242662B true CN102242662B (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101817223A Active CN102242662B (en) | 2010-05-10 | 2010-05-10 | Static mixer of selective catalytic reduction (SCR) denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102242662B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444451A (en) * | 2011-12-14 | 2012-05-09 | 杭州银轮科技有限公司 | Static mixer for diesel engine aftertreatment system |
| CN102444453A (en) * | 2011-12-14 | 2012-05-09 | 杭州银轮科技有限公司 | Static mixer of exhaust system |
| CN107035480B (en) * | 2016-02-03 | 2019-08-09 | 天纳克（苏州）排放系统有限公司 | Mixing chamber component |
| GB2577212B (en) | 2017-06-06 | 2022-02-16 | Cummins Emission Solutions Inc | Systems and methods for mixing exhaust gases and reductant in an aftertreatment system |
| CN109236431B (en) * | 2017-07-10 | 2021-03-23 | 河北工业大学 | Detachable spiral-flow type vehicular SCR mixer and nozzle coupling device |
| DE102018104599B4 (en) | 2018-02-28 | 2021-06-10 | Tenneco Gmbh | Low pressure EGR system with turbo bypass |
| GB2607787B (en) | 2020-02-27 | 2024-09-25 | Cummins Emission Solutions Inc | Mixers for use in aftertreatment systems |
| CN115398085B (en) | 2020-05-08 | 2023-07-14 | 康明斯排放处理公司 | Configurable aftertreatment system including housing |
| CN116348195A (en) | 2020-10-22 | 2023-06-27 | 康明斯排放处理公司 | exhaust aftertreatment system |
| WO2022169775A1 (en) | 2021-02-02 | 2022-08-11 | Cummins Emission Solutions Inc. | Exhaust gas aftertreatment systems |
| US12123337B2 (en) | 2021-03-18 | 2024-10-22 | Cummins Emission Solutions Inc. | Aftertreatment systems |
| CN117396668A (en) | 2021-07-27 | 2024-01-12 | 康明斯排放处理公司 | Exhaust gas aftertreatment system |
| WO2023028002A1 (en) | 2021-08-23 | 2023-03-02 | Cummins Emission Solutions Inc. | Outlet sampling system for aftertreatment system |
| USD1042545S1 (en) | 2022-04-21 | 2024-09-17 | Cummins Emission Solutions Inc. | Aftertreatment system |
| USD1042544S1 (en) | 2022-04-21 | 2024-09-17 | Cummins Emission Solutions Inc. | Aftertreatment system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101029590A (en) * | 2006-03-02 | 2007-09-05 | J.埃贝斯佩歇合资公司 | Static mixer and exhaust treatment device |
| CN101349182A (en) * | 2007-07-20 | 2009-01-21 | 三菱扶桑卡客车株式会社 | Exhaust purification device for engine |
| CN201687557U (en) * | 2010-05-10 | 2010-12-29 | 杭州银轮科技有限公司 | Static mixer of SCR denitration system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4827256B2 (en) * | 2007-06-21 | 2011-11-30 | 日野自動車株式会社 | Exhaust treatment device |
-
2010
- 2010-05-10 CN CN2010101817223A patent/CN102242662B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101029590A (en) * | 2006-03-02 | 2007-09-05 | J.埃贝斯佩歇合资公司 | Static mixer and exhaust treatment device |
| CN101349182A (en) * | 2007-07-20 | 2009-01-21 | 三菱扶桑卡客车株式会社 | Exhaust purification device for engine |
| CN201687557U (en) * | 2010-05-10 | 2010-12-29 | 杭州银轮科技有限公司 | Static mixer of SCR denitration system |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2009-2213A 2009.01.08 |
Also Published As
| Publication number | Publication date |
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| CN102242662A (en) | 2011-11-16 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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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 SCR denitration system Effective date of registration: 20210610 Granted publication date: 20121219 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: 20121219 Pledgee: Bank of China Limited by Share Ltd. Tiantai County branch Pledgor: ZHEJIANG YINLUN MACHINERY Co.,Ltd. Registration number: Y2021330000510 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220815 Address after: No. 419, Hebei Avenue, Chibi City, Xianning City, Hubei Province, 437300 Patentee after: CHIBI YINLUN INDUSTRIAL HEAT EXCHANGER Co.,Ltd. Address before: 310013, East 416, A zone, Zhejiang Science Park, 525 Xixi Road, Zhejiang, Hangzhou Patentee before: HANGZHOU YINLUN SCIENCE AND TECHNOLOGY Co.,Ltd. Patentee before: ZHEJIANG YINLUN MACHINERY Co.,Ltd. |
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| TR01 | Transfer of patent right |