WO2017084548A1 - Système de post-traitement d'échappement pour moteur - Google Patents

Système de post-traitement d'échappement pour moteur Download PDF

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Publication number
WO2017084548A1
WO2017084548A1 PCT/CN2016/105816 CN2016105816W WO2017084548A1 WO 2017084548 A1 WO2017084548 A1 WO 2017084548A1 CN 2016105816 W CN2016105816 W CN 2016105816W WO 2017084548 A1 WO2017084548 A1 WO 2017084548A1
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WO
WIPO (PCT)
Prior art keywords
cavity
mixing chamber
communication
chamber assembly
baffle
Prior art date
Application number
PCT/CN2016/105816
Other languages
English (en)
Chinese (zh)
Inventor
陈智
王伟
毛伟
童毅君
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 WO2017084548A1 publication Critical patent/WO2017084548A1/fr

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    • 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 system.
  • Engine exhaust aftertreatment systems are primarily devices used to treat or evolve toxic and hazardous materials in the exhaust.
  • the poisonous substances in the exhaust gas mainly include hydrocarbons, carbon monoxide, nitrogen oxides, and particulate matter.
  • the oxidation type catalytic converter and the particle trap are disposed in series in the first housing, and additionally provided a first cavity in communication with the first housing; the selective catalytic reducing agent And being disposed in the second housing, and additionally providing a second cavity in communication with the second housing; and then connecting the first and second cavities in series by means of a connecting pipe.
  • the exhaust gas is mixed with the urea droplets in the connecting conduit, and the mixture then enters the second chamber and is passed through a selective catalytic reducing agent to reduce harmful substances.
  • the distribution is not uniform, and thus the mixture cannot be uniformly passed through the selective catalytic reducing agent, which reduces the processing efficiency.
  • an engine exhaust aftertreatment system including a first aftertreatment component, a first mixing cavity component in communication with the first aftertreatment component, and the first a second aftertreatment component disposed side by side with the aftertreatment component, a second mixing cavity component in communication with the second aftertreatment component, and a third mixing cavity component in communication with the first and second mixing cavity components;
  • a post-processing component and the second post-processing component are connected in series by the first, second, and third mixing cavity components;
  • the second mixing cavity component includes a housing having an inner cavity, located therein a baffle in the chamber and a distribution plate located downstream of the baffle, wherein the baffle partitions the inner cavity into a cavity between the baffle and the distribution plate
  • the baffle is curved to form the cavity into a first cavity adjacent to the inlet and a second cavity remote from the inlet, the first cavity being in communication with the second cavity
  • the volume of the first cavity is larger than the first Volume of the cavity; said distribution plate is provided with a plurality of
  • the baffle is provided with a plurality of welding claws for welding in the casing.
  • the third mixing chamber assembly is in communication with the cavity from a side or an outer peripheral surface.
  • the baffle is provided with an arc portion at least partially corresponding to the first cavity and a flat portion at least partially corresponding to the second cavity at a position .
  • the third mixing chamber assembly is in communication with the cavity from the side, and the deflector is provided with a recess connected to the curved portion, the recess Aligned with the third mixing chamber assembly in position.
  • the third mixing chamber assembly is in communication with the cavity from the outer peripheral surface, and the curved portion is S-shaped.
  • the first aftertreatment component comprises a diesel oxidation catalyst and/or a diesel particulate trap
  • the second aftertreatment component comprises a selective catalytic reducing agent
  • the third mixing chamber assembly includes a mixing tube in communication with the first mixing chamber assembly, the mixing tube includes a hollow inner cavity surrounding the periphery of the inner cavity And a plurality of fins distributed in the circumferential direction, a plurality of slots corresponding to the plurality of fins and communicating with the inner cavity, and a plurality of openings on one side of the fin and adjacent to the urea nozzle mounting portion.
  • the third mixing chamber assembly includes at least one static mixer.
  • the welding claw is perpendicular to the deflector.
  • the present invention provides a baffle and a distribution plate, the baffle being curved to form a first cavity and a second cavity, the volume of the first cavity being larger than the first The volume of the two chambers.
  • the exhaust gas can be relatively uniformly distributed in the first and second chambers.
  • the plurality of through holes of the distribution plate facilitate uniform passage of the mixture of exhaust gas and urea droplets.
  • Figure 1 is a perspective view of a first embodiment of an engine exhaust aftertreatment system 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;
  • Fig. 4 is a partially exploded perspective view of Fig. 1;
  • Figure 5 is an exploded perspective view of the second mixing chamber assembly of Figure 2.
  • Figure 6 is an exploded perspective view of another angle of Figure 5.
  • Figure 7 is a cross-sectional view taken along line A-A of Figure 2 .
  • Figure 8 is a perspective view of the second embodiment of the engine exhaust aftertreatment system of the present invention.
  • Figure 9 is an exploded perspective view of the second mixing chamber of Figure 8.
  • Figure 10 is an exploded perspective view of another angle of Figure 9.
  • Figure 11 is a cross-sectional view taken along line B-B of Figure 8.
  • the present invention discloses an engine exhaust aftertreatment system 100 including a first aftertreatment assembly 1 and a first mixing chamber assembly 2 in communication with the first aftertreatment assembly 1. a second aftertreatment assembly 3 disposed side by side with the first aftertreatment assembly 1, a second mixing chamber assembly 4 in communication with the second aftertreatment assembly 3, and a communication with the first and second mixing chamber assemblies 2, 4 of the third mixing chamber assembly 5.
  • the first post-processing component 1 and the second post-processing component 3 are connected in series by the first, second, and third mixing chamber components 2, 4, and 5.
  • the first aftertreatment assembly 1 includes a first housing 11 , an oxidation type catalytic converter (DOC) 12 mounted in the first housing 11 , and is mounted on the A particulate trap (DPF) 13 in the first housing 11 and an exhaust inlet 14 upstream of the oxidizing catalytic converter 12.
  • DOC oxidation type catalytic converter
  • DPF particulate trap
  • the second aftertreatment assembly 3 includes a second housing 31, a selective catalytic reducing agent 32 installed in the second housing 31, and the selective catalysis.
  • the first mixing chamber assembly 2 and the second mixing chamber assembly 4 are substantially identical in shape.
  • the first mixing chamber assembly 2 is for directing exhaust gas from the first aftertreatment assembly 1 to the third mixing chamber assembly 5.
  • the first mixing chamber assembly 2 is provided with a urea nozzle mounting portion 21 at a position facing the third mixing chamber assembly 5 for mounting a urea nozzle.
  • the third mixing chamber assembly 5 includes a mixing tube 51 in communication with the first mixing chamber assembly 2.
  • the mixing tube 51 includes a hollow inner cavity 52, a plurality of fins 53 distributed around the periphery of the inner cavity 52 and circumferentially, corresponding to the plurality of fins 53 and the inner cavity 52
  • a plurality of slots 54 are communicated, and a plurality of openings 55 are located on one side of the fin 53 and adjacent to the urea nozzle mounting portion 21.
  • the second mixing chamber assembly 4 includes a housing 41 having an internal cavity 411, a baffle 42 located within the internal cavity 411, and a distribution plate 43 located downstream of the baffle 42.
  • the baffle 42 divides the inner cavity 411 into a cavity 412 between the baffle 42 and the distribution plate 43.
  • the baffle 42 is curved to form the cavity 412 into a first cavity 4121 adjacent to the inlet 44 and a second cavity 4122 remote from the inlet 44, the first cavity 4121 and the
  • the second cavity 4122 is in communication, and the volume of the first cavity 4121 is larger than the volume of the second cavity 4122.
  • the distribution plate 43 is provided with a plurality of through holes 431 to facilitate the passage of a mixture of exhaust gas and urea droplets.
  • the third mixing chamber assembly 5 is in communication with the cavity 412 from a side (eg, left and right sides).
  • the deflector 42 is provided with a plurality of welding claws 421 for welding in the casing 41 , and the welding claws 421 are perpendicular to the deflector 42 .
  • the baffle 42 is provided with an arcuate portion 422 at least partially corresponding to the first cavity 4121, a recessed portion 423 extending upward from the curved portion 422, and from the curved portion 422 A lower extending flat portion 424.
  • the recess 423 is in position aligned with the third mixing chamber assembly 5.
  • the flat portion 424 at least partially corresponds in position to the second cavity 4122.
  • the recessed portion 423 is used to block the mixed exhaust gas The mixed exhaust gas uniformly fills the first cavity 4121 and the second cavity 4122 under the guidance of the curved portion 422 and the flat portion 424.
  • the present invention achieves adjustment of the mixed exhaust by setting the volume of the first cavity 4121 near the inlet 44 to be smaller than the second cavity 4122.
  • the main difference between the second embodiment of the present invention and the first embodiment is the first, second, and third mixing chamber assemblies 2, 4, 5.
  • the first and second mixing chamber assemblies 2, 4 are substantially cylindrical.
  • the third mixing chamber assembly 5 is in communication with the cavity 412 from an outer peripheral surface.
  • the curved portion is S-shaped.
  • the third mixing chamber assembly 5 includes at least one static mixer 56.

Landscapes

  • 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 système de post-traitement d'échappement pour un moteur, lequel système comprend un premier ensemble de post-traitement (1), un premier ensemble de chambre de mélange (2), un second ensemble de post-traitement (3), un deuxième ensemble de chambre de mélange (4), et un troisième ensemble de chambre de mélange (5) en communication avec les premier et deuxième ensembles de chambre de mélange. Le deuxième ensemble de chambre de mélange (4) comprend un boîtier (41) avec une chambre interne (411), une plaque de guidage d'écoulement (42) disposée à l'intérieur de la chambre interne (411), et une plaque de distribution (43) disposée en aval de la plaque de guidage d'écoulement (42). La plaque de guidage d'écoulement (42) divise la chambre interne (411) afin de former une cavité (412) entre la plaque de guidage d'écoulement (42) et la plaque de distribution (43), et la plaque de guidage d'écoulement (42) est incurvée de manière à diviser la cavité (412) en une première chambre (4121) qui est proche d'une entrée et une seconde chambre (4122) qui est éloignée de l'entrée. La première chambre (4121) et la seconde chambre (4122) sont en communication, et le volume de la première chambre (4121) est supérieur à celui de la seconde chambre (4122) de façon à faciliter une répartition uniforme d'un mélange d'échappement. La plaque de distribution (43) comporte plusieurs trous traversants (431) pour faciliter la passage du mélange d'échappement.
PCT/CN2016/105816 2015-11-19 2016-11-15 Système de post-traitement d'échappement pour moteur WO2017084548A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201520926238.7U CN205243595U (zh) 2015-11-19 2015-11-19 发动机排气后处理系统
CN201520926238.7 2015-11-19

Publications (1)

Publication Number Publication Date
WO2017084548A1 true WO2017084548A1 (fr) 2017-05-26

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CN (1) CN205243595U (fr)
WO (1) WO2017084548A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN107461250A (zh) * 2016-06-03 2017-12-12 天纳克（苏州）排放系统有限公司 发动机排气后处理系统
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
CN108019259B (zh) * 2016-11-04 2020-11-20 天纳克（苏州）排放系统有限公司 箱体式尾气后处理装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102052127A (zh) * 2009-11-10 2011-05-11 通用汽车环球科技运作公司 喷嘴扩散器混合器
US20110107869A1 (en) * 2009-11-11 2011-05-12 Hyundai Motor Company Integrated control apparatus for heating, ventilating, and air conditioning system for vehicle
CN202012386U (zh) * 2010-12-15 2011-10-19 杭州银轮科技有限公司 一种用于柴油机尿素scr系统的混合装置
CN203452872U (zh) * 2013-03-08 2014-02-26 埃贝施佩歇尔排气技术有限及两合公司 用于排气催化器的入流室和用于机动车的排气净化系统
WO2014167353A1 (fr) * 2013-04-11 2014-10-16 Perkins Engines Company Limited Hotte à écoulement et module de nettoyage d'émissions
WO2014167354A2 (fr) * 2013-04-11 2014-10-16 Perkins Engines Company Limited Module d'épuration d'émissions et mécanisme de fixation
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102052127A (zh) * 2009-11-10 2011-05-11 通用汽车环球科技运作公司 喷嘴扩散器混合器
US20110107869A1 (en) * 2009-11-11 2011-05-12 Hyundai Motor Company Integrated control apparatus for heating, ventilating, and air conditioning system for vehicle
CN202012386U (zh) * 2010-12-15 2011-10-19 杭州银轮科技有限公司 一种用于柴油机尿素scr系统的混合装置
CN203452872U (zh) * 2013-03-08 2014-02-26 埃贝施佩歇尔排气技术有限及两合公司 用于排气催化器的入流室和用于机动车的排气净化系统
WO2014167353A1 (fr) * 2013-04-11 2014-10-16 Perkins Engines Company Limited Hotte à écoulement et module de nettoyage d'émissions
WO2014167354A2 (fr) * 2013-04-11 2014-10-16 Perkins Engines Company Limited Module d'épuration d'émissions et mécanisme de fixation
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

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Publication number Publication date
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