WO2017101628A1 - Dispositif de post-traitement d'échappement de moteur - Google Patents

Dispositif de post-traitement d'échappement de moteur Download PDF

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Publication number
WO2017101628A1
WO2017101628A1 PCT/CN2016/105815 CN2016105815W WO2017101628A1 WO 2017101628 A1 WO2017101628 A1 WO 2017101628A1 CN 2016105815 W CN2016105815 W CN 2016105815W WO 2017101628 A1 WO2017101628 A1 WO 2017101628A1
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WO
WIPO (PCT)
Prior art keywords
cavity
engine exhaust
aftertreatment device
exhaust aftertreatment
selective catalytic
Prior art date
Application number
PCT/CN2016/105815
Other languages
English (en)
Chinese (zh)
Inventor
王伟
童毅君
王聪
毛伟
赵治国
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 WO2017101628A1 publication Critical patent/WO2017101628A1/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

Definitions

  • the present invention relates to an engine exhaust aftertreatment device.
  • Engine exhaust aftertreatment devices are primarily devices used to treat or purify toxic and hazardous materials in the exhaust.
  • the poisonous substances in the exhaust gas mainly include hydrocarbons, carbon monoxide, nitrogen oxides, and particulate matter.
  • a combination of an oxidation type catalytic converter (DOC), a particulate trap (DPF), and a selective catalytic reduction agent (SCR) system has been used in the prior art to improve the efficiency of exhaust gas treatment.
  • the oxidizing catalytic converter and the particulate trap are disposed in series within the first housing; the selective catalytic reducing agent is disposed within the second housing; and then the first 1.
  • the second housing is connected in series.
  • a technical solution using a mixing pipe or a static mixer is provided in the prior art.
  • the mixing tube is generally applied under the condition that the engine exhaust aftertreatment device can provide sufficient installation space.
  • the technical scheme of the static mixer is usually adopted.
  • the overall size of the engine exhaust aftertreatment device is limited by the customer's installation size and cannot be infinitely wide, while the hybrid structure on the mixing tube It has a certain length, so how to solve such a problem that the installation of such a mixing tube can be installed in the case where the overall size of the engine exhaust after-treatment device is relatively small has become one of the technical problems to be solved in the industry.
  • an engine exhaust aftertreatment device including an inlet for communicating with exhaust gas of an engine, a first cavity communicating with the inlet, and the first a mixing tube in communication with the chamber, a downstream aftertreatment assembly located downstream of the mixing tube and in communication with the mixing tube, and an outlet in communication with the downstream aftertreatment assembly;
  • the mixing tube including a hollow interior cavity, a plurality of fins surrounding the periphery of the inner cavity and distributed circumferentially, and a plurality of slots corresponding to the plurality of fins and communicating with the inner cavity;
  • the engine exhaust aftertreatment device including a casing
  • the housing includes a first end plate and a first inner side plate cooperating with the first end plate, wherein the first inner side plate is fixed to the first end plate to form a space therebetween a first cavity;
  • the housing includes an expansion cavity in communication with the first cavity, the expansion cavity and the first cavity being respectively located on opposite sides of the first end plate, wherein the wing a sheet and the slot through the first
  • the first inner side plate is provided with a first opening
  • the housing comprises a sleeve portion fixed on the first opening, and the sleeve portion is provided with the expansion cavity And an end wall at the root of the expansion chamber, the end wall being provided with a through hole for the mixing tube to pass through.
  • the sleeve portion is welded to the inner side of the first opening.
  • the joint of the mixing tube and the through hole is welded and sealed.
  • the housing is provided with a nozzle mounting portion corresponding to the mixing tube;
  • the mixing tube has a cylindrical shape, and the mixing tube includes one side of the fin and is close to a plurality of openings of the nozzle mounting portion.
  • the engine exhaust aftertreatment device includes an upstream aftertreatment component connected between the inlet and the first cavity, the upstream aftertreatment component including an oxidizing catalytic converter And / or particle traps.
  • the downstream aftertreatment component comprises a selective catalytic reducing agent.
  • the first end plate is provided with a second perforation and a third perforation corresponding to the first group of selective catalytic reducing agents and the second group of selective catalytic reducing agents, respectively.
  • the housing includes a second inner side panel that mates with the first end panel, wherein the second inner side panel covers a periphery of the second perforation and the third perforation to form a second cavity, The second cavity is in communication with the outlet.
  • the housing includes a first outer side plate at a periphery of the first inner side panel and the second inner side panel, and the outlet extends through the first outer side panel.
  • the present invention provides a mixing tube, so that the urea solution sprayed from the nozzle is surrounded by the vortex exhaust gas in the inner cavity of the mixing tube, thereby avoiding the urea directly contacting the inner wall, thereby reducing the urea.
  • the vortex exhaust improves the uniformity of mixing with the atomized urea solution, thereby increasing the efficiency of the exhaust treatment.
  • the installation of the mixing tube is not limited to the overall size of the engine exhaust aftertreatment device, and the back pressure of the system can be flexibly adjusted by adjusting the volume of the expansion chamber to achieve a standardized design.
  • Figure 1 is a perspective view of an engine exhaust aftertreatment device of the present invention.
  • Figure 2 is a perspective view of another angle of Figure 1.
  • Fig. 3 is a partially exploded perspective view of Fig. 2;
  • Figure 4 is a further exploded perspective view of Figure 3.
  • Figure 5 is a further exploded perspective view of Figure 4.
  • Figure 6 is a partial perspective view of Figure 1 with a portion of the housing removed and the nozzle removed.
  • Figure 7 is a partial exploded perspective view of Figure 6 with the sleeve portion separated.
  • Figure 8 is an exploded perspective view of another angle of Figure 7.
  • Figure 9 is a schematic cross-sectional view taken along line A-A of Figure 1, and showing the swirling direction of the exhaust gas as it enters the mixing tube.
  • Figure 10 is a cross-sectional view taken along line B-B of Figure 1.
  • an engine exhaust aftertreatment device 100 including an upstream aftertreatment assembly 2 having a housing 1 located within the housing 1 and the upstream aftertreatment assembly. 2 a downstream aftertreatment component 3 in series, and a mixing tube 4 for connecting the upstream and downstream aftertreatment components 2, 3 in series.
  • the upstream aftertreatment component 2 comprises an oxidation type catalytic converter (DOC) 21 and/or a particle trap (DPF) 22, wherein the oxidation type catalytic converter 21 is located
  • DOC oxidation type catalytic converter
  • DPF particle trap
  • the downstream aftertreatment component 3 includes a selective catalytic reducing agent (SCR).
  • the selective catalytic reducing agent comprises a first set of selective catalytic reducing agents 31 disposed side by side and a second set of selective catalytic reducing agents 32, the first set of selective catalytic reductions
  • the agent 31 is in parallel with the second set of selective catalytic reducing agents 32.
  • the casing 1 includes a cylindrical portion 11, a first outer side plate 12 at one end of the cylindrical portion 11, a second outer side plate 13 at the other end of the cylindrical portion 11, and a second outer side plate 13 connected thereto.
  • An inlet 14 in communication with the exhaust of the engine, and an outlet 15 through the first outer panel 12 are provided.
  • the housing 1 is further provided with a plurality of support plates 16 located inside thereof for supporting the upstream aftertreatment assembly 2 and the downstream aftertreatment assembly 3.
  • the support plate 16 includes a first end plate 5 adjacent the outlet 15.
  • the first end plate 5 includes a first perforation 51 corresponding to the particle trap (DPF) 22, and a second perforation corresponding to the first set of selective catalytic reducing agent 31. 52.
  • a third perforation 53 corresponding to the second set of selective catalytic reducing agents 32, and a first opening 54 through which at least a portion of the mixing tube 4 passes.
  • the housing 1 includes a first inner side plate 61 and a second inner side plate 62 fixed to the first end plate 5, wherein the first inner side plate 61 is welded to the a first end plate 5 is formed between them to form a first cavity 71 therebetween, and the first inner side plate 61 covers the first through hole 51 and the first opening 54; the second inner side plate 62 is welded The first end plate 5 is formed to form a second cavity 72 therebetween, and the second inner side plate 62 covers the second through hole 52 and the third through hole 53.
  • the outlet 15 is in communication with the second cavity 72.
  • the housing 1 is provided with a nozzle mounting portion 17 corresponding to the mixing tube 4 for mounting the urea nozzle 18.
  • the mixing tube 4 has a cylindrical shape, and includes a hollow inner cavity 41 surrounding the outer periphery of the inner cavity 41. a plurality of fins 42 distributed in the circumferential direction, and a plurality of slots 43 corresponding to the plurality of fins 42 and communicating with the inner cavity 41, and one side of the fins 42 and adjacent to the nozzle mounting portion A plurality of openings 44 of 17.
  • the slit 43 is formed by punching the fins 42, and the openings 44 are evenly distributed circumferentially around the periphery of the inner cavity 41.
  • the fins 42 are arranged at an angle such that after the exhaust gas passes through the slot 43, a good eddy current can be formed in the inner cavity 41.
  • the housing 1 includes a sleeve portion 8 that is fixed to the first opening 54.
  • the sleeve portion 8 is provided with an expansion chamber 81 and an end wall 82 at the root of the expansion chamber 81.
  • the end wall 82 is provided with a through hole 821 through which the mixing tube 4 passes.
  • the expansion cavity 81 is in communication with the first cavity 71, and the expansion cavity 81 and the first cavity 71 are respectively located on two sides of the first end plate 5, wherein the fins 42 and the The slot 43 passes through the first cavity 71, and the fin 42 and the slot 43 are housed together in the first cavity 71 and the expansion cavity 81.
  • the sleeve portion 8 is welded inside the first opening 54.
  • the junction of the mixing tube 4 and the through hole 821 is welded and sealed.
  • the exhaust from the engine first enters from the inlet 14 and then passes through the oxidation-type catalytic converter 21 and the particle trap 22 in sequence, and then enters the first cavity from the first perforation 51. 71; under the action of the exhaust pressure, the exhaust gas is guided by the fins 42 through the slot 43 and the opening 44 into the inner cavity 41; when the injection condition is reached, the urea nozzle 18 directly atomizes The urea solution is sprayed into the inner cavity 41; the exhaust gas mixed with the urea droplets is divided into two paths simultaneously into the first group of selective catalytic reducing agent 31 and the second group of selective catalytic reducing agent 32, and then passes through After the second cavities 72 meet, they finally exit from the outlet 15.
  • the nozzle mounting portion 17 is adjacent to the plurality of openings 44. Due to the urea solution ejected from the urea nozzle 18, a dead zone is easily formed at a position away from the spout, which easily causes crystallization. After the solution of the present invention, the urea solution at the position can flow out from the opening 44. Thereby reducing the risk of urea crystallization.
  • the urea solution sprayed from the urea nozzle 18 is surrounded by the vortex exhaust gas in the inner cavity 41 of the mixing tube 4, thereby avoiding direct contact of the urea with the inner wall, reducing the risk of crystallization.
  • the vortex exhaust improves the uniformity of mixing with the atomized urea solution, thereby increasing the efficiency of the exhaust treatment, enabling the solution of the present invention to meet the requirements of more stringent emission regulations.
  • the present invention increases the installation space inside the engine exhaust after-treatment device 100 by providing the sleeve portion 8, and is not limited to the overall size of the engine exhaust after-treatment device 100, and can be flexibly adjusted by adjusting the volume of the expansion chamber 81. Back pressure of the system to achieve standardized design.

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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

La présente invention concerne un dispositif de post-traitement d'échappement de moteur (100), comprenant une entrée (14), une première cavité (71), un tube de mélange (4), un ensemble de post-traitement en aval (3) et une sortie (15). Le tube de mélange (4) comprend une cavité interne creuse (41), plusieurs ailettes (42) et plusieurs rainures (43) correspondant aux ailettes. Le dispositif de post-traitement d'échappement de moteur comprend un boîtier (1). Le boîtier (1) comprend une première plaque d'extrémité (5) et une première plaque latérale interne (61). La première plaque latérale interne (61) est fixée sur la première plaque d'extrémité (5) de manière à former la première cavité (71) entre celles-ci. Le boîtier (1) comprend une cavité d'extension (81) en communication avec la première cavité (71). La cavité d'extension (81) et la première cavité (71) sont situées sur les deux côtés de la première plaque d'extrémité (5), respectivement. Les ailettes (42) et les rainures (43) sont reçues dans la première cavité (71) et la cavité d'extension (81), collectivement. De cette manière, un échappement tourbillonnant peut améliorer l'uniformité de mélange avec une solution d'urée atomisée ; en outre, en disposant la cavité d'extension (81), l'installation du tube de mélange (4) n'est pas limitée à la taille globale du dispositif de post-traitement d'échappement de moteur.
PCT/CN2016/105815 2015-12-18 2016-11-15 Dispositif de post-traitement d'échappement de moteur WO2017101628A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201521064810.XU CN205243598U (zh) 2015-12-18 2015-12-18 发动机排气后处理装置
CN201521064810.X 2015-12-18

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WO2017101628A1 true WO2017101628A1 (fr) 2017-06-22

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WO (1) WO2017101628A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106894870B (zh) * 2015-12-18 2020-07-03 天纳克（苏州）排放系统有限公司 发动机排气后处理装置
CN107461239A (zh) * 2016-06-03 2017-12-12 天纳克（苏州）排放系统有限公司 混合腔组件
CN107489502B (zh) * 2016-06-13 2020-06-30 天纳克（苏州）排放系统有限公司 尾气后处理混合装置
CN106246303B (zh) * 2016-10-12 2019-01-15 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN108019258B (zh) * 2016-11-04 2020-11-24 天纳克（苏州）排放系统有限公司 箱体式尾气后处理装置
CN108104913A (zh) * 2016-11-25 2018-06-01 天纳克（苏州）排放系统有限公司 排气后处理装置
CN108979801A (zh) * 2017-07-27 2018-12-11 天纳克（苏州）排放系统有限公司 发动机排气后处理混合装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009002213A (ja) * 2007-06-21 2009-01-08 Hino Motors Ltd 排気処理装置
CN203452874U (zh) * 2013-07-09 2014-02-26 潍柴动力股份有限公司 Scr催化消声器及其混合管装置
US20150071828A1 (en) * 2013-05-07 2015-03-12 Tenneco Automotive Operating Company Inc. Exhaust mixing assembly
CN105089750A (zh) * 2015-08-21 2015-11-25 天纳克（苏州）排放系统有限公司 排气处理装置
CN204827615U (zh) * 2015-07-27 2015-12-02 天纳克（苏州）排放系统有限公司 双层混合管及其排气后处理装置
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009002213A (ja) * 2007-06-21 2009-01-08 Hino Motors Ltd 排気処理装置
US20150071828A1 (en) * 2013-05-07 2015-03-12 Tenneco Automotive Operating Company Inc. Exhaust mixing assembly
CN203452874U (zh) * 2013-07-09 2014-02-26 潍柴动力股份有限公司 Scr催化消声器及其混合管装置
CN204827615U (zh) * 2015-07-27 2015-12-02 天纳克（苏州）排放系统有限公司 双层混合管及其排气后处理装置
CN105089750A (zh) * 2015-08-21 2015-11-25 天纳克（苏州）排放系统有限公司 排气处理装置
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

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