CN110332034B - Vertical SCR post-treatment urea mixing device - Google Patents
Vertical SCR post-treatment urea mixing device Download PDFInfo
- Publication number
- CN110332034B CN110332034B CN201910781633.3A CN201910781633A CN110332034B CN 110332034 B CN110332034 B CN 110332034B CN 201910781633 A CN201910781633 A CN 201910781633A CN 110332034 B CN110332034 B CN 110332034B
- Authority
- CN
- China
- Prior art keywords
- cyclone
- baffle
- baffle plate
- partition plate
- fixed
- 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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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 239000004202 carbamide Substances 0.000 title claims abstract description 21
- 238000005192 partition Methods 0.000 claims description 54
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 17
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention relates to a vertical SCR post-treatment urea mixing device, wherein a front baffle plate, a rear baffle plate and a cyclone baffle plate are fixed in a mixing cylinder, a U-shaped plate is fixed on the front baffle plate and the rear baffle plate, an upper baffle plate and a middle baffle plate are fixed between the front baffle plate and the rear baffle plate, a nozzle base is fixed on the upper surface of the upper baffle plate, cyclone fins are arranged on the upper section pipe body of a cyclone pipe, a mixing air outlet hole is arranged on the lower section pipe body of the cyclone pipe, a guide opening and a front guide bottom groove are arranged on the front baffle plate, a rear guide groove is arranged on the rear baffle plate corresponding to the lower section pipe body of the cyclone pipe, a rear guide fin is fixed on the rear wall surface of the rear baffle plate, a main air outlet hole is arranged in the middle of the cyclone baffle plate, a cyclone hole is arranged on the cyclone baffle plate outside the main air outlet hole, and a cyclone lug is fixed on the rear wall surface of the baffle plate corresponding to the position of the cyclone hole. The invention can fully mix the ammonia gas and the tail gas, save mixing time, greatly improve gas mixing efficiency and ensure tail gas treatment effect.
Description
Technical Field
The invention relates to a vertical SCR post-treatment urea mixing device, and belongs to the technical field of diesel engine tail gas treatment system equipment.
Background
With increasing strictness of diesel emission regulations, exhaust gas aftertreatment technology is a technical measure that must be adopted. SCR can meet national IV emission standard, and the basic principle of SCR is that urea injection system is adoptedCommonly known as a urea pump) atomizes a 32.5% concentration urea aqueous solution, sprays the atomized urea aqueous solution into an exhaust pipe to be mixed with engine tail gas, and generates ammonia (NH) through pyrolysis and hydrolysis reaction of the urea aqueous solution 3 ) Ammonia gas under the action of catalyst can make harmful nitrogen-oxygen compound (NO) x ) Is converted into harmless nitrogen (N) 2 ) And water, the primary task of the SCR route of the engine exhaust treatment technology is to thoroughly mix the exhaust with the ammonia mist and chemically react while ensuring a sufficient temperature before entering the catalyst. In the prior art, the problem of insufficient mixing of tail gas and ammonia gas exists in the process of treating automobile tail gas, so that the tail gas treatment is incomplete, and the invention of an efficient mixer is very important.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the vertical SCR post-treatment urea mixing device which can fully mix ammonia gas and tail gas, save mixing time, improve gas mixing efficiency and ensure tail gas treatment effect.
According to the technical scheme provided by the invention, the vertical SCR post-treatment urea mixing device comprises a mixing cylinder, a front baffle plate, a nozzle base, a swirl tube, an upper baffle plate, a rear baffle plate, a swirl baffle plate, a middle baffle plate and a U-shaped plate;
the device comprises a mixing cylinder body, a front partition plate, a rear partition plate and a cyclone partition plate, wherein a U-shaped plate is fixed on the front partition plate and the rear partition plate, an upper partition plate and a middle partition plate are fixed between the front partition plate and the rear partition plate, a nozzle base is fixed on the upper surface of the upper partition plate, a cyclone fin is fixed between the upper partition plate and the middle partition plate, a lower pipe body of the cyclone pipe is fixed on the lower surface of the middle partition plate, a mixing air outlet is formed in the lower pipe body of the cyclone pipe, a guide opening is formed in the front partition plate corresponding to the upper pipe body of the cyclone pipe, a front guide bottom groove is formed in the front partition plate corresponding to the lower end part of the lower pipe body of the cyclone pipe, the front guide bottom groove is in the shape of an arc with two ends upturned, a rear guide groove is formed in the rear partition plate corresponding to the lower pipe body of the cyclone pipe, a rear guide fin is fixed on the rear wall surface of the rear partition plate, a main air outlet is formed in the middle of the cyclone pipe, a cyclone outlet is formed in the middle of the cyclone pipe, and a cyclone hole is formed in the cyclone wall corresponding to the cyclone wall of the cyclone wall corresponding to the rear guide position of the rear guide groove.
An outer cylinder is arranged outside the mixing cylinder, and heat insulation cotton is arranged between the mixing cylinder and the outer cylinder.
The axis of the cyclone tube is perpendicular to the axis of the mixing cylinder.
The planes of the front partition plate, the rear partition plate and the rotational flow partition plate are arranged in parallel in pairs, and the planes of the front partition plate and the axis of the mixing cylinder are arranged vertically.
The upper partition plate and the middle partition plate are arranged in parallel, and the middle partition plate and the front partition plate are arranged vertically.
The rear guide groove is transversely arranged.
The length of the rear guide fin is 50-80 mm, and the width of the rear guide fin is 7-20 mm.
The rotational flow Kong Wei is uniformly distributed around the circle center of the rotational flow partition plate.
The diameter of the main air outlet hole is 10-70 mm.
Front guide side grooves are formed in the front partition plates corresponding to the inner side wall and the outer side wall of the lower pipe body of the cyclone pipe.
The invention has smart, efficient and compact structure, can fully mix ammonia gas and tail gas, can save mixing time, greatly improves gas mixing efficiency and ensures tail gas treatment effect.
Drawings
Fig. 1 is one of the perspective views of the present invention.
Fig. 2 is a second perspective view of the present invention.
Detailed Description
The invention will be further illustrated with reference to specific examples.
The invention relates to a vertical SCR post-treatment urea mixing device, which comprises a mixing cylinder body 1, a front partition plate 3, a nozzle base 4, a cyclone tube 5, an upper partition plate 6, a rear partition plate 7, a cyclone partition plate 8, a middle partition plate 10 and a U-shaped plate 12;
the mixing drum 1 is internally fixed with a front baffle 3, a rear baffle 7 and a cyclone baffle 8, a U-shaped plate 12 is fixed on the front baffle 3 and the rear baffle 7, an upper baffle 6 and a middle baffle 10 are fixed between the front baffle 3 and the rear baffle 7, a nozzle base 4 is fixed on the upper surface of the upper baffle 6, an upper section pipe body of the cyclone pipe 5 is fixed between the upper baffle 6 and the middle baffle 10, cyclone fins 51 are arranged on the upper section pipe body of the cyclone pipe 5, a lower section pipe body of the cyclone pipe 5 is fixed on the lower surface of the middle baffle 10, a mixing air outlet hole 52 is arranged on the lower section pipe body of the cyclone pipe 5, a guide opening 31 is formed on the front baffle 3 corresponding to the upper section pipe body of the cyclone pipe 5, a front guide bottom groove 32 is formed on the front baffle 3 corresponding to the lower end part of the lower section pipe body of the cyclone pipe 5, a rear guide groove 71 is formed on the rear baffle 7 corresponding to the lower section pipe body of the cyclone pipe 5, a rear guide fin 72 is fixed on the rear wall surface of the rear baffle 7, a main air outlet hole 82 is formed on the rear baffle 8 corresponding to the rear baffle 8, and an air outlet hole 82 is formed on the rear baffle 8 corresponding to the rear guide hole 82.
An outer cylinder 14 is arranged outside the mixing cylinder 1, and heat insulation cotton 13 is arranged between the mixing cylinder 1 and the outer cylinder 14.
The axis of the cyclone tube 5 is perpendicular to the axis of the mixing cylinder 1.
The planes of the front partition plate 3, the rear partition plate 7 and the rotational flow partition plate 8 are arranged in parallel in pairs, and the plane of the front partition plate 3 is perpendicular to the axis of the mixing cylinder 1.
The upper partition plate 6 and the middle partition plate 10 are arranged in parallel, and the middle partition plate 10 and the front partition plate 3 are arranged vertically.
The rear guide groove 71 is disposed in a lateral direction.
The length of the rear guide fin 72 is 50-80 mm, and the width of the rear guide fin 72 is 7-20 mm.
The swirl holes 82 are uniformly distributed around the center of the swirl baffle 8.
The diameter of the main air outlet hole 81 is 10-70 mm.
Front guide side grooves 33 are formed in the front partition plate 3 corresponding to the inner side wall and the outer side wall of the lower pipe body of the swirl pipe 5.
In the invention, the space in front of the front baffle plate 3 forms a front cavity 2, the space among the front baffle plate 3, the middle baffle plate 10, the U-shaped plate 12 and the rear baffle plate 7 forms a middle cavity 11, and the space among the rear baffle plate 7 and the cyclone baffle plate 8 forms a rear cavity 9.
When the invention is specifically used, tail gas enters the front cavity 2, passes through the guide opening 31 on the front partition plate 3, enters the cyclone tube 5 through the cyclone fins 51 to form rotary airflow, urea enters the cyclone tube 5 from the urea nozzle arranged on the nozzle base 4 to be mixed with the tail gas, after the rotary mixing, the mixed gas enters the middle cavity 11 after being mixed again through the mixing air outlet hole 52, and a part of airflow is blown to the bottom of the cyclone tube 5 through the front guide bottom groove 32, so that the crystallization of urea solution at the bottom of the cyclone tube 5 is avoided. The air flow enters the rear cavity 9 through the rear guide groove 71 arranged on the rear partition plate 7, the rear guide fin 72 guides the air flow passing through the rear guide groove 71 upwards, one part of mixed gas enters the rear of the cyclone partition plate 8 through the main air outlet hole 81, the other part of mixed gas enters the rear of the cyclone partition plate 8 through the cyclone holes 82 and forms rotary air flow under the action of the cyclone lugs 83, and the two parts of air are mixed again and then enter the catalyst carrier.
Claims (6)
1. A vertically arranged SCR post-treatment urea mixing device comprises a mixing cylinder (1), a front baffle plate (3), a nozzle base (4), a cyclone tube (5), an upper baffle plate (6), a rear baffle plate (7), a cyclone baffle plate (8), a middle baffle plate (10) and a U-shaped plate (12); the method is characterized in that:
a front baffle (3), a rear baffle (7) and a rotational flow baffle (8) are fixed in the mixing cylinder (1), a U-shaped plate (12) is fixed on the front baffle (3) and the rear baffle (7), an upper baffle (6) and a middle baffle (10) are fixed between the front baffle (3) and the rear baffle (7), a nozzle base (4) is fixed on the upper surface of the upper baffle (6), an upper section pipe body of a rotational flow pipe (5) is fixed between the upper baffle (6) and the middle baffle (10), rotational flow fins (51) are arranged on the upper section pipe body of the rotational flow pipe (5), a lower section pipe body of the rotational flow pipe (5) is fixed on the lower surface of the middle baffle (10), a mixing air outlet hole (52) is arranged on the lower section pipe body of the rotational flow pipe (5), a guide opening (31) is arranged on the front baffle (3) corresponding to the upper section pipe body position of the rotational flow pipe (5), a front guide groove (32) is arranged on the front baffle (3) corresponding to the lower end position of the lower section pipe body of the rotational flow pipe (5), a circular arc-shaped guide groove (32) is arranged on the front baffle (3) corresponding to the lower end position of the rotational flow pipe body of the rotational flow pipe (5), a guide groove (72) is arranged on the rear baffle (7) corresponding to the lower section pipe body of the rotational flow pipe (7), the rear guide fin (72) guides the air flow passing through the rear guide groove (71) upwards, a main air outlet hole (81) is formed in the middle of the cyclone separator (8), a cyclone hole (82) is formed in the cyclone separator (8) at the outer side of the main air outlet hole (81), and a cyclone lug (83) is fixed on the rear wall surface of the cyclone separator (8) corresponding to the position of the cyclone hole (82); the axis of the cyclone tube (5) is perpendicular to the axis of the mixing cylinder (1);
the planes of the front partition plate (3), the rear partition plate (7) and the rotational flow partition plate (8) are arranged in parallel in pairs, and the plane of the front partition plate (3) is perpendicular to the axis of the mixing cylinder (1);
the rear guide groove (71) is transversely arranged;
front guide side grooves (33) are formed in the front partition plate (3) corresponding to the inner side wall and the outer side wall of the lower pipe body of the cyclone pipe (5).
2. The vertical SCR aftertreatment urea mixing device of claim 1, wherein: an outer cylinder (14) is arranged outside the mixing cylinder (1), and heat-insulating cotton (13) is arranged between the mixing cylinder (1) and the outer cylinder (14).
3. The vertical SCR aftertreatment urea mixing device of claim 1, wherein: the upper partition plate (6) and the middle partition plate (10) are arranged in parallel, and the middle partition plate (10) and the front partition plate (3) are arranged vertically.
4. The vertical SCR aftertreatment urea mixing device of claim 1, wherein: the length of the rear guide fin (72) is 50-80 mm, and the width of the rear guide fin (72) is 7-20 mm.
5. The vertical SCR aftertreatment urea mixing device of claim 1, wherein: the swirl holes (82) are uniformly distributed around the center of the swirl baffle plate (8).
6. The vertical SCR aftertreatment urea mixing device of claim 1, wherein: the diameter of the main air outlet hole (81) is 10-70 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910781633.3A CN110332034B (en) | 2019-08-23 | 2019-08-23 | Vertical SCR post-treatment urea mixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910781633.3A CN110332034B (en) | 2019-08-23 | 2019-08-23 | Vertical SCR post-treatment urea mixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110332034A CN110332034A (en) | 2019-10-15 |
| CN110332034B true CN110332034B (en) | 2024-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910781633.3A Active CN110332034B (en) | 2019-08-23 | 2019-08-23 | Vertical SCR post-treatment urea mixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110332034B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848005B (en) * | 2019-11-26 | 2020-10-20 | 无锡亿利环保科技有限公司 | Engine tail gas aftertreatment mixing arrangement |
| CN111156072B (en) * | 2019-12-19 | 2021-03-19 | 河北亿利科技股份有限公司 | Tail gas aftertreatment mixing arrangement |
| CN111425284A (en) * | 2020-05-07 | 2020-07-17 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment mixing arrangement and exhaust aftertreatment device |
| CN113790092B (en) * | 2021-09-27 | 2023-03-24 | 无锡威孚力达催化净化器有限责任公司 | Double-vortex flow type urea mixing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009144766A1 (en) * | 2008-05-27 | 2009-12-03 | 日野自動車株式会社 | Exhaust emission purifier |
| WO2016146015A1 (en) * | 2015-03-17 | 2016-09-22 | 天纳克（苏州）排放系统有限公司 | Mixing tube and exhaust gas treatment device thereof |
| CN106437968A (en) * | 2016-10-24 | 2017-02-22 | 无锡威孚力达催化净化器有限责任公司 | Integrated wavy type rotational flow urea mixing device |
| CN106523091A (en) * | 2016-10-24 | 2017-03-22 | 无锡威孚力达催化净化器有限责任公司 | Page window type cyclone urea mixing device |
| CN108194179A (en) * | 2018-03-14 | 2018-06-22 | 潍柴动力股份有限公司 | A kind of post processing air inlet mixing arrangement |
| CN207686804U (en) * | 2017-12-23 | 2018-08-03 | 无锡威孚力达催化净化器有限责任公司 | Eddy flow urea mixing device |
| CN210343459U (en) * | 2019-08-23 | 2020-04-17 | 无锡威孚力达催化净化器有限责任公司 | Vertical SCR (Selective catalytic reduction) aftertreatment urea mixing device |
-
2019
- 2019-08-23 CN CN201910781633.3A patent/CN110332034B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009144766A1 (en) * | 2008-05-27 | 2009-12-03 | 日野自動車株式会社 | Exhaust emission purifier |
| WO2016146015A1 (en) * | 2015-03-17 | 2016-09-22 | 天纳克（苏州）排放系统有限公司 | Mixing tube and exhaust gas treatment device thereof |
| CN106437968A (en) * | 2016-10-24 | 2017-02-22 | 无锡威孚力达催化净化器有限责任公司 | Integrated wavy type rotational flow urea mixing device |
| CN106523091A (en) * | 2016-10-24 | 2017-03-22 | 无锡威孚力达催化净化器有限责任公司 | Page window type cyclone urea mixing device |
| CN207686804U (en) * | 2017-12-23 | 2018-08-03 | 无锡威孚力达催化净化器有限责任公司 | Eddy flow urea mixing device |
| CN108194179A (en) * | 2018-03-14 | 2018-06-22 | 潍柴动力股份有限公司 | A kind of post processing air inlet mixing arrangement |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110332034A (en) | 2019-10-15 |
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