WO2017206946A1 - Ensemble à chambre de mélange - Google Patents

Ensemble à chambre de mélange Download PDF

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Publication number
WO2017206946A1
WO2017206946A1 PCT/CN2017/086997 CN2017086997W WO2017206946A1 WO 2017206946 A1 WO2017206946 A1 WO 2017206946A1 CN 2017086997 W CN2017086997 W CN 2017086997W WO 2017206946 A1 WO2017206946 A1 WO 2017206946A1
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WO
WIPO (PCT)
Prior art keywords
row
fins
sub
cavity
mixing chamber
Prior art date
Application number
PCT/CN2017/086997
Other languages
English (en)
Chinese (zh)
Inventor
王聪
赵治国
韩文军
孙小冈
彭宇
Original Assignee
天纳克（苏州）排放系统有限公司
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）排放系统有限公司 filed Critical 天纳克（苏州）排放系统有限公司
Publication of WO2017206946A1 publication Critical patent/WO2017206946A1/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
    • F01N3/18—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]
    • F01N3/2073—Selective catalytic reduction [SCR] with means for generating a reducing substance from the exhaust gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices

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 being provided with a first row of fins and a second row of fins in a thickness direction perpendicular to a direction of flow of the exhaust gas, wherein The oblique directions of the first row of fins and the second row of fins cross each
  • the mixer is provided with a frame for fixing the first row of fins and the second row of fins, the frame is provided with a first upper surface and through the first a plurality of chutes of the upper surface, the chute including a first chute for inserting the first row of fins and a second chute for inserting the second row of fins.
  • the mixer includes a partition plate located in the frame, the partition plate is provided with a second upper surface and a plurality of oblique grooves penetrating the second upper surface, the inclined The groove includes a third chute for inserting the first row of fins and a fourth chute for inserting the second row of fins, wherein two ends of the first row of fins are respectively inserted into the first slot In the chute and the third chute, two ends of the second row of fins are respectively inserted into the second chute and the fourth chute.
  • the first row of fins are perpendicular to the second row of fins, and the first row of fins and the second row of fins are not upwardly beyond the first Upper surface and second upper surface.
  • the mixer further has a third row of fins and a fourth row of fins in a thickness direction perpendicular to the flow direction of the exhaust gas, wherein the third row of fins and The fourth row of fins are located below the first row of fins and the second row of fins, and the third row of fins and the fourth row of fins extend in a vertical direction.
  • the frame is provided with a first lower surface and a plurality of vertical grooves extending through the first lower surface, the vertical grooves including a first for inserting the third row of fins a vertical slot and a second vertical slot for insertion of the fourth row of fins.
  • the partition plate is provided with a second lower surface and a plurality of vertical grooves extending through the second lower surface, the vertical grooves including the third row of fins inserted a third vertical slot and a fourth vertical slot for insertion of the fourth row of fins, wherein two ends of the third row of fins are respectively inserted into the first vertical slot and the third vertical slot In the slot, two ends of the fourth row of fins are respectively inserted into the second vertical slot and the fourth vertical slot.
  • the third row of fins and the fourth row of fins do not extend downward beyond the first lower surface and the second lower surface.
  • 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 a second opening communicating with the second sub-cavity and corresponding to the second after-treatment component, the mounting hole being located on the side The top of the wall.
  • the first sub-cavity and the second sub-cavity are mutually offset; in the thickness direction, the mixing cavity assembly is disposed in the first sub-cavity An inclined portion with the second sub-cavity to form a constriction corresponding to the mixer.
  • the mixing chamber assembly includes the first post-processing component and the first A baffle between the sub-chambers, the baffle being provided with a plurality of perforations.
  • the present invention forms a better swirling effect by providing a first row of fins and a second row of fins which are double-layered and intersect in an oblique direction.
  • This arrangement increases the stroke of the airflow in a limited space, ensures that the urea droplets are thoroughly mixed with the exhaust gas, and ensures that the urea droplets are sufficiently heated, thereby increasing the evaporation rate of the urea droplets, improving the uniformity of ammonia molecular distribution, and reducing the urea crystallization. risks of.
  • 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.
  • Figure 9 is a front elevational view of Figure 8.
  • Figure 10 is a perspective view of the cover of Figure 8 after removal, and schematically indicating the position of the urea nozzle and the direction of the engine's exhaust and urea droplets double swirl.
  • Figure 11 is a perspective view of the mixer of Figure 8.
  • Fig. 12 is an exploded perspective view of Fig. 11;
  • Figure 13 is a front elevational view of the partition of Figure 12.
  • the present invention discloses a mixing chamber assembly 100 for use in an engine exhaust aftertreatment device to treat engine exhaust.
  • 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 selective catalytic reduction module
  • 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 sidewall 12 includes a first sidewall 121 at least partially forming the first sub-cavity 10 , and a second sidewall at least partially forming the second sub-cavity 20 .
  • the first left side wall 1211 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 first row of fins 41 , a second row of fins 42 , a third row of fins 43 and a fourth row of fins 44 , wherein the first The fins 41 and the second row of fins 42 are located at the upper end, and the third row of fins 43 and the fourth row of fins 44 are located at the lower end.
  • the oblique directions of the first row of fins 41 and the second row of fins 42 cross each other, and the third row of fins 43 and the fourth row of fins 44 extend in the vertical direction.
  • the first row of fins 41 are perpendicular to the second row of fins 42.
  • the mixer 40 is provided with a frame 45 for fixing the above fins and a partition 46 located inside the frame 45.
  • the frame 45 has a trapezoidal shape, and is provided with a first upper surface 451, a plurality of chutes 452 extending through the first upper surface 451, a first lower surface 453, and a plurality of vertical slots 454 extending through the first lower surface 453.
  • the chute 452 includes a first chute 4521 for inserting the first row of fins 41 and a second chute 4522 for inserting the second row of fins 42.
  • the vertical slot 454 includes a first vertical slot 4541 for insertion of the third row of fins 43 and a second vertical slot 4542 for insertion of the fourth row of fins 44.
  • the partition 46 is provided with a second upper surface 461 , a plurality of oblique grooves 462 extending through the second upper surface 461 , a second lower surface 463 , and a second lower surface 463 .
  • the oblique groove 462 includes a third chute 4621 into which the first row of fins 41 is inserted and a fourth chute 4622 into which the second row of fins 42 are inserted.
  • the vertical groove 464 includes a third vertical groove 4641 into which the third row of fins 43 is inserted and a fourth vertical groove 4642 into which the fourth row of fins 44 are inserted.
  • the two ends of the first row of fins 41 are respectively inserted into the first chute 4521 and the third chute 4621.
  • the two ends of the second row of fins 42 are respectively inserted into the second chute 4522 and the fourth chute 4622.
  • Two ends of the third row of fins 43 are respectively inserted into the first vertical groove 4541 and the third vertical groove 4641, and two ends of the fourth row of fins 44 are respectively inserted into the second vertical row Straight groove 4542 and the fourth vertical groove 4642.
  • the first row of fins 41 and the second row of fins 42 do not extend upward beyond the first upper surface 451 and the second upper surface 461 .
  • the third row of fins 43 and the fourth row of fins 44 do not extend downward beyond the first lower surface 453 and the second lower surface 463.
  • 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.

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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) destinée à être utilisée en communication avec une première partie de post-traitement (200), une seconde sous-chambre (20) destinée à être utilisée en communication avec une seconde partie 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. Le mélangeur (40) est pourvu d'une première rangée d'ailettes (41) et d'une seconde rangée d'ailettes (42) dans la direction de l'épaisseur perpendiculaire à une direction d'écoulement de gaz d'échappement, les directions d'inclinaison de la première rangée d'ailettes (41) et de la seconde rangée d'ailettes (42) se croisent. L'ensemble à chambre de mélange (100) 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/CN2017/086997 2016-06-03 2017-06-02 Ensemble à chambre de mélange WO2017206946A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610390228.5 2016-06-03
CN201610390228.5A CN107461239A (zh) 2016-06-03 2016-06-03 混合腔组件

Publications (1)

Publication Number Publication Date
WO2017206946A1 true WO2017206946A1 (fr) 2017-12-07

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PCT/CN2017/086997 WO2017206946A1 (fr) 2016-06-03 2017-06-02 Ensemble à chambre de mélange

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CN (1) CN107461239A (fr)
WO (1) WO2017206946A1 (fr)

Cited By (1)

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DE102019104772A1 (de) * 2019-01-08 2020-07-09 Eberspächer Exhaust Technology GmbH & Co. KG Abgasanlage

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CN109931133A (zh) * 2019-02-19 2019-06-25 北汽福田汽车股份有限公司 混合腔组件、尾气后处理装置和车辆

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JP5619430B2 (ja) * 2010-01-29 2014-11-05 日野自動車株式会社 排気浄化装置
WO2015076765A1 (fr) * 2013-11-22 2015-05-28 Ford Otomotiv Sanayi Anonim Sirketi Mélangeur
CN205117466U (zh) * 2015-11-18 2016-03-30 天纳克（苏州）排放系统有限公司 混合器及其混合组件
CN205243595U (zh) * 2015-11-19 2016-05-18 天纳克（苏州）排放系统有限公司 发动机排气后处理系统
CN205243598U (zh) * 2015-12-18 2016-05-18 天纳克（苏州）排放系统有限公司 发动机排气后处理装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019104772A1 (de) * 2019-01-08 2020-07-09 Eberspächer Exhaust Technology GmbH & Co. KG Abgasanlage
US11156142B2 (en) 2019-01-08 2021-10-26 Purem GmbH Exhaust system

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