WO2018045883A1 - Ensemble à chambre de mélange - Google Patents

Ensemble à chambre de mélange Download PDF

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Publication number
WO2018045883A1
WO2018045883A1 PCT/CN2017/099080 CN2017099080W WO2018045883A1 WO 2018045883 A1 WO2018045883 A1 WO 2018045883A1 CN 2017099080 W CN2017099080 W CN 2017099080W WO 2018045883 A1 WO2018045883 A1 WO 2018045883A1
Authority
WO
WIPO (PCT)
Prior art keywords
hollow portion
fin
sub
mixing chamber
cavity
Prior art date
Application number
PCT/CN2017/099080
Other languages
English (en)
Chinese (zh)
Inventor
王聪
孙小冈
彭宇
Original Assignee
天纳克（苏州）排放***有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 天纳克（苏州）排放***有限公司 filed Critical 天纳克（苏州）排放***有限公司
Publication of WO2018045883A1 publication Critical patent/WO2018045883A1/fr

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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
    • F01N3/24—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
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/16—Chambers with particular shapes, e.g. spherical
    • 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

Definitions

  • the invention relates to a mixing chamber assembly, belonging to the technical field of engine exhaust aftertreatment.
  • the uniformity of ammonia distribution in the exhaust aftertreatment system has an important impact on the overall performance and durability of the system. If the distribution of ammonia (NH 3 ) is uneven, the nitrogen oxide (NOx) conversion efficiency is too low, and if the urea injection amount is increased in order to satisfy the discharge performance, ammonia leakage contamination is likely to occur. At the same time, the urea droplets are easily deposited when they are exposed to a wall surface having a relatively low temperature, and when the crystal is severely formed, the exhaust pipe is blocked, resulting in a decrease in engine power performance. Increasing the mixing uniformity of ammonia molecules can effectively improve the urea utilization rate and reduce the urea injection amount, thereby reducing the risk of urea crystallization.
  • SCR system selective catalytic reduction system
  • a mixing chamber assembly for use in an engine exhaust aftertreatment device, the mixing chamber assembly including a cavity and a mounting hole for mounting a urea nozzle, the cavity a first sub-cavity for communicating with the first post-processing component, a second sub-cavity for communicating with the second post-processing component, and a first sub-cavity and the second sub-cavity a middle sub-cavity, wherein the first sub-cavity is located upstream of the exhaust gas flow direction than the second sub-cavity, and the urea nozzle is configured to inject urea droplets into the first sub-cavity
  • the mixing chamber assembly further includes a mixer located in the intermediate sub-cavity, the mixer is provided with a frame body and a plurality of fins disposed obliquely, wherein the frame body includes a first hollow portion in a substantially clockwise direction.
  • the mixer further comprising a first fin located in the first hollow portion, located in the second hollow Second fin in the department, located a third fin in the third hollow portion, a fourth fin located in the fourth hollow portion, a fifth fin located in the fifth hollow portion, and a sixth fin located in the sixth hollow portion,
  • the first fin, the second fin, the third fin, the fourth fin, the fifth fin, and the sixth fin are sequentially inclined in the hour hand direction.
  • the first hollow portion, the sixth hollow portion and the fifth hollow portion are arranged in a first row, and the second hollow portion, the third hollow portion and the fourth hollow portion are arranged in a row
  • the second row of the first row is parallel;
  • the first hollow portion and the second hollow portion are arranged in a first row, the sixth hollow portion and the third hollow portion are arranged in a second column, the fifth hollow portion and the fourth hollow portion The portions are arranged in a third column, wherein the second column is located between the first column and the third column.
  • the frame has a trapezoidal shape, and includes a first side, a second side, a third side and a fourth side connected to each other, wherein the first side is short
  • the third side is a long side.
  • the mixer includes a first partition wall erected on the second side edge and the fourth side edge, the first hollow portion, the sixth hollow portion, and the fifth The hollow portion is located at one side of the first partition wall, and the second hollow portion, the third hollow portion, and the fourth hollow portion are located on the other side of the first partition wall.
  • the mixer includes a plurality of second partition walls mounted on the first side, the first partition wall and the third side, and the second partition wall is provided with a third a sheet extending from one end of the third sheet, the sixth fin extending from the other end of the third sheet, the third fin and the sixth fin The tilt of the sheet is reversed.
  • the mixer includes a plurality of first plates erected on the second side and the second partition wall closest to the second side, the first wing The sheet extends from the first sheet.
  • the mixer includes a plurality of second plates erected on the second side and the second partition wall closest to the second side, the second wing The sheet extends from the second sheet.
  • the mixer includes a plurality of fourth plates erected on the fourth side wall and the second partition wall closest to the fourth side, the fourth wing The sheet extends from the fourth sheet.
  • the mixer includes a plurality of fifth plates erected on the fourth side wall and the second partition wall closest to the fourth side, the fifth wing The sheet extends from the fifth sheet.
  • the hour hand direction is a clockwise direction or a counterclockwise direction.
  • the mixing chamber assembly includes a main body portion and a cover plate that cooperates with the main body portion, the main body portion includes a side plate and a side wall extending from the side plate, the cover a plate is fixed on the side wall, the first sub-cavity, the second sub-cavity and the intermediate sub-cavity are formed by the main body portion and the cover plate; the cover plate includes the first sub-chamber a cavity communicating and corresponding to the first opening of the first after-treatment component and communicating with the second sub-cavity and corresponding to the first A second opening of the second processing component, the mounting aperture being located at a top end of the sidewall.
  • the mixing chamber assembly includes a baffle between the first post-processing component and the first sub-cavity, and the baffle is provided with a plurality of perforations.
  • the present invention provides a mixer of the above structure, and the urea droplets and the exhaust gas are mixed under the corresponding hollow portions and the turbulence of the fins, thereby improving the uniformity of mixing.
  • the flow of the gas flow in a limited space is increased, ensuring that the urea droplets are thoroughly mixed with the exhaust gas while ensuring that the urea droplets are sufficiently heated, thereby increasing the evaporation rate of the urea droplets, improving the uniformity of the distribution of the ammonia molecules, and reducing the crystallization of the urea. risk.
  • FIG. 1 is a perspective view of the mixing chamber assembly of the present invention assembled with a first aftertreatment component and a second aftertreatment component.
  • Figure 2 is a partial exploded perspective view of Figure 1 with the mixing chamber assembly separated.
  • Figure 3 is a partial exploded perspective view of the mixing chamber assembly of Figure 2 with the cover and baffle separated.
  • Figure 4 is a further exploded perspective view of Figure 3 with the mixer also separated.
  • Figure 5 is a perspective view of the mixing chamber assembly of Figure 2 at another angle.
  • Figure 6 is a front elevational view of the mixing chamber assembly of Figure 2.
  • Figure 7 is a side view of Figure 6.
  • Figure 8 is a perspective view of the mixing chamber assembly of Figure 2 with the cover removed and the baffle removed.
  • Figure 9 is a front elevational view of Figure 8.
  • Figure 10 is a perspective view of another angle of Figure 9 with the frame of the mixer removed.
  • Figure 11 is a perspective view of the mixer of Figure 8.
  • Figure 12 is a perspective view of another angle of Figure 11.
  • Figure 13 is a perspective view of another angle of Figure 12 .
  • Figure 14 is a perspective view of another angle of Figure 11 .
  • Figure 15 is a perspective view of another angle of Figure 14.
  • Figure 16 is an exploded perspective view of the mixer of Figure 8.
  • Figure 17 is an exploded perspective view of another angle of Figure 16;
  • the present invention discloses a mixing chamber assembly 100 for use in an engine exhaust aftertreatment device. Handle the exhaust of the engine.
  • the exhaust aftertreatment device may include a first aftertreatment component 200 located upstream of the mixing chamber assembly 100 and/or a second aftertreatment component 300 located downstream of the mixing chamber assembly 100.
  • the first aftertreatment component 200 may be an oxidation catalyst (DOC) or a combination of a DOC and a diesel particulate trap (DPF)
  • the second aftertreatment component 300 may be a selective catalytic reduction module (SCR).
  • DOC oxidation catalyst
  • DPF selective catalytic reduction module
  • SDPF DPF coated with an SCR catalyst can also be used in place of the DPF.
  • the shape of the exhaust aftertreatment device may be linear, U-shaped, Z-shaped, L-shaped, or the like.
  • DOC, DPF, SDPF, etc. can be designed as other types of catalysts or combinations according to actual needs, and details are not described herein again.
  • the mixing chamber assembly 100 includes a cavity 101 and a mixer 40 located within the cavity 101.
  • the cavity 101 includes a first sub-cavity 10, a second sub-cavity 20, and a middle sub-cavity 30 connecting the first sub-cavity 10 and the second sub-cavity 20.
  • the first sub-cavity 10 is located upstream of the exhaust gas flow direction than the second sub-cavity 20, and the mixer 40 is located in the intermediate sub-cavity 30.
  • the mixing chamber assembly 100 of the present invention includes a body portion 1 and a cover plate 2 that mates with the body portion 1.
  • the body portion 1 includes a side panel 11 and a side wall 12 extending from the side panel 11.
  • the cover plate 2 is fixed to the side wall 12 by, for example, welding.
  • the first sub-cavity 10, the second sub-cavity 20, and the intermediate sub-cavity 30 are formed by the main body portion 1 and the cover plate 2.
  • the side wall 12 is provided with a mounting hole 1213 for mounting a urea nozzle at a position near the top thereof.
  • the mounting hole 1213 is located at the upper left of the mixing chamber assembly 100, that is, at an angle to the center plane of the mixing chamber assembly 100.
  • the mixing chamber assembly 100 is provided with an inclined portion 50 between the first sub-cavity 10 and the second sub-cavity 20 in a thickness direction AA perpendicular to the exhaust gas flow direction to form a corresponding portion The neck 51 of the mixer 40.
  • the cover plate 2 includes a first plate portion 21 , a second plate portion 22 , and a tilt connecting the first plate portion 21 and the second plate portion 22 . Face 23.
  • the inclined surface portion 23 corresponds to the inclined portion 50.
  • the first plate portion 21 is provided with a first opening 211 communicating with the first sub-cavity 10 and corresponding to the first post-processing component 200
  • the second plate portion 22 is provided with the The second sub-cavity 20 is in communication and corresponds to the second opening 221 of the second after-treatment component 300.
  • the first opening 211 is an upstream exhaust inlet and the second opening 221 is a downstream exhaust outlet.
  • the mixer 40 is provided with a frame body 7 and a plurality of fins 8 disposed obliquely.
  • the frame body 7 includes a first hollow portion 71 and a second portion in a substantially clockwise direction.
  • the fin 8 is provided with a first fin 81 located in the first hollow portion 71, a second fin 82 located in the second hollow portion 72, and a portion located in the third hollow portion 73.
  • the hour hand direction is a counterclockwise direction indicated by an elliptical upper arrow, and of course, in other embodiments, it may be a clockwise direction.
  • the urea droplets and the exhaust gas are mixed under the corresponding hollow portions and the turbulence of the fins, thereby improving the uniformity of mixing and reducing the risk of urea crystallization.
  • the hollow portion divides the mixture of urea droplets and exhaust gas into approximately different regions, thereby improving the uniformity of the distribution.
  • the mixture can be formed into a swirling flow, thereby improving the uniformity of mixing. Referring to FIG. 9 and FIG. 10, the mixture is substantially formed on the inner and outer sides of the second sub-cavity 20 by the third fin 83 and the sixth fin 86 as shown in FIG. 9 and FIG.
  • the double swirl shown is shown to increase the mixing effect.
  • the first hollow portion 71, the sixth hollow portion 76, and the fifth hollow portion 75 are arranged in a first row, the second hollow portion 72, the third hollow portion 73, and the first The four hollow portions 74 are arranged in a second row parallel to the first row.
  • the first hollow portion 71 and the second hollow portion 72 are arranged in a first row, and the sixth hollow portion 76 and the third hollow portion 73 are arranged in a second column, and the fifth hollow portion 75 is The fourth hollow portions 74 are arranged in a third column, wherein the second column is located between the first column and the third column.
  • the frame body 7 is substantially trapezoidal, and includes a first side edge 701, a second side edge 702, a third side edge 703, and a fourth side edge 704 that are connected to each other.
  • the first side 701 is a short side
  • the third side 703 is a long side.
  • the mixer 40 includes a first partition wall 811 spanned on the second side 702 and the fourth side 704, the first hollow portion 71, the sixth hollow portion 76, and the fifth hollow portion 75. Located on one side of the first partition wall 811, the second hollow portion 72, the third hollow portion 73, and the fourth hollow portion 74 are located on the other side of the first partition wall 811.
  • the first partition wall 811 is provided with a vertical flat plate portion 8111 and a seventh fin 8112 extending in opposite directions from both ends of the flat plate portion 8111 and Eighth fin 8113.
  • the seventh fin 8112 has the same inclination direction as the first fin 81 and the second fin 82, and the eighth fin 8113 has the same inclination direction as the fourth fin 84 and the fifth fin 85.
  • the mixer 40 includes a plurality of second partition walls 821 spanned on the first side edge 701, the first partition wall 811 and the third side edge 703, and the second partition wall 821 is provided with a third plate 8211
  • the third fin 83 extends from one end of the third plate 8211 (for example, the front end in FIG. 16), and the sixth fin 86 is from the other end of the third plate 8211 (for example, FIG. 16
  • the rear end of the third fin 83 extends opposite to the oblique direction of the sixth fin 86.
  • the mixer 40 includes a plurality of first plates 810 spanned on the second side 702 and the second partition 821 closest to the second side 702, the first fins 81
  • the first plate 810 extends.
  • the mixer 40 includes a plurality of second plates 820 spanned on the second side 702 and the second partition 821 closest to the second side 702, the second fin 82 The second plate 820 extends.
  • the mixer 40 includes a plurality of fourth plates 840 spanned on the fourth side 704 and the second dividing wall 821 closest to the fourth side 704, the fourth fin 84
  • the fourth plate 840 extends.
  • the mixer 40 includes a plurality of fifth plates 850 mounted on the fourth side 704 and the second dividing wall 821 closest to the fourth side 704, the fifth fin 85 The fifth plate 850 extends.
  • the first plate 810, the second plate 820, the third plate 8211, the fourth plate 840, and the fifth plate 850 all extend in a lateral direction;
  • the 8111 extends longitudinally and is interdigitated with the transverse direction. Grooves are provided at the top ends of the frame body 7, the third plate piece 8211, and the flat plate portion 8111 for positioning corresponding plates.
  • the mixing chamber assembly 100 includes a baffle 6 between the first post-processing component 200 and the first sub-cavity 10 , and the baffle 6 is provided with a plurality of baffles 6 . Perforation 61.
  • the baffle 6 By providing the baffle 6, the deflection of the exhaust gas from the first after-treatment component 200 directly to the injected urea can be reduced, the mixing of the urea droplets and the exhaust gas can be improved, the evaporation rate of the urea droplets can be improved, and the ammonia distribution can be improved. Uniformity reduces the risk of urea crystallization.
  • the fins of the mixer 40 can also be arranged to be divided into inner and outer layers.
  • the direction of inclination of the fins of the inner layer is opposite to the direction of inclination of the fins of the outer layer, for example, the fins of the inner layer are inclined clockwise, and the fins of the outer layer are inclined counterclockwise, and vice versa.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un ensemble à chambre de mélange (100) destiné à être utilisé dans un appareil de post-traitement de gaz d'échappement de moteur. L'ensemble de chambre de mélange (100) comprend une chambre (101) et un trou de montage (1213) pour monter une buse à urée. La chambre (101) comprend une première sous-chambre (10) utilisée pour la communication avec un premier composant de post-traitement (200), une seconde sous-chambre (20) utilisée pour la communication avec un second composant de post-traitement (300), et une sous-chambre intermédiaire (30). La buse à urée est utilisée pour pulvériser des gouttelettes d'urée dans la première sous-chambre (10). L'ensemble à chambre de mélange (100) comprend en outre un mélangeur (40) situé dans la sous-chambre intermédiaire (30). Le mélangeur (40) est pourvu d'un cadre (7) et de plusieurs ailettes disposées obliquement (8). Le cadre (7) comprend de manière séquentielle plusieurs parties creuses (71,72,73,74,75, 76) et plusieurs ailettes (81, 82, 83, 84, 85, 86) situées dans les parties creuses (71,72,73,74,75, 76) approximativement dans le sens des aiguilles d'une montre, les ailettes (81, 82, 8384, 85, 86) étant séquentiellement obliques dans le sens des aiguilles d'une montre. Une telle configuration améliore le mélange entre les gouttelettes d'urée et les gaz d'échappement, améliore le taux d'évaporation des gouttelettes d'urée et réduit le risque de cristallisation de l'urée.
PCT/CN2017/099080 2016-09-07 2017-08-25 Ensemble à chambre de mélange WO2018045883A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610807090.4 2016-09-07
CN201610807090.4A CN107795359B (zh) 2016-09-07 2016-09-07 混合腔组件

Publications (1)

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WO2018045883A1 true WO2018045883A1 (fr) 2018-03-15

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CN (1) CN107795359B (fr)
WO (1) WO2018045883A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110374729A (zh) * 2019-07-11 2019-10-25 东风商用车有限公司 一种箱式后处理混合器
IT201900001933A1 (it) * 2019-02-11 2020-08-11 Cnh Ind Italia Spa Sistema migliorato di trattamento dei gas di scarico per un veicolo
IT201900007740A1 (it) * 2019-05-31 2020-12-01 Magneti Marelli Spa Dispositivo di trattamento dei gas di scarico con iniezione di un agente riducente per un motore a combustione interna
CN113586211A (zh) * 2021-09-13 2021-11-02 浙江银轮机械股份有限公司 翅片管及混合器
FR3111664A1 (fr) * 2020-06-19 2021-12-24 Faurecia Systemes D'echappement Mélangeur de réducteur pour gaz d’échappement
CN115680839A (zh) * 2022-11-14 2023-02-03 一汽解放汽车有限公司 降低尿素结晶的后处理混合器和后处理方法

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CN102022165A (zh) * 2010-12-15 2011-04-20 杭州银轮科技有限公司 一种车用尿素scr***的混合装置
CN103133096A (zh) * 2011-11-22 2013-06-05 现代自动车株式会社 用于汽车中的废气的混合设备
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CN101473115A (zh) * 2006-04-24 2009-07-01 弗利特加尔公司 带有冲压***法兰的排气后处理混合器
DE102007012790A1 (de) * 2007-03-16 2008-09-18 Audi Ag Statischer Mischer für eine Abgasanlage einer Brennkraftmaschine
CN102022165A (zh) * 2010-12-15 2011-04-20 杭州银轮科技有限公司 一种车用尿素scr***的混合装置
CN103133096A (zh) * 2011-11-22 2013-06-05 现代自动车株式会社 用于汽车中的废气的混合设备
CN104619965A (zh) * 2012-08-24 2015-05-13 双叶产业株式会社 排气搅拌装置
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CN206111298U (zh) * 2016-09-07 2017-04-19 天纳克（苏州）排放***有限公司 混合腔组件

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900001933A1 (it) * 2019-02-11 2020-08-11 Cnh Ind Italia Spa Sistema migliorato di trattamento dei gas di scarico per un veicolo
WO2020165121A1 (fr) * 2019-02-11 2020-08-20 Cnh Industrial Italia S.P.A. Système de post-traitement perfectionné destiné à un véhicule
US11506101B2 (en) * 2019-02-11 2022-11-22 Cnh Industrial America Llc After treatment system for a vehicle
IT201900007740A1 (it) * 2019-05-31 2020-12-01 Magneti Marelli Spa Dispositivo di trattamento dei gas di scarico con iniezione di un agente riducente per un motore a combustione interna
CN110374729A (zh) * 2019-07-11 2019-10-25 东风商用车有限公司 一种箱式后处理混合器
CN110374729B (zh) * 2019-07-11 2024-05-10 东风商用车有限公司 一种箱式后处理混合器
FR3111664A1 (fr) * 2020-06-19 2021-12-24 Faurecia Systemes D'echappement Mélangeur de réducteur pour gaz d’échappement
CN113586211A (zh) * 2021-09-13 2021-11-02 浙江银轮机械股份有限公司 翅片管及混合器
CN115680839A (zh) * 2022-11-14 2023-02-03 一汽解放汽车有限公司 降低尿素结晶的后处理混合器和后处理方法
CN115680839B (zh) * 2022-11-14 2024-05-10 一汽解放汽车有限公司 降低尿素结晶的后处理混合器和后处理方法

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CN107795359A (zh) 2018-03-13

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