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WO2018006718A1 - Dispositif de post-traitement de gaz résiduaire - Google Patents

Dispositif de post-traitement de gaz résiduaire Download PDF

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Publication number
WO2018006718A1
WO2018006718A1 PCT/CN2017/089980 CN2017089980W WO2018006718A1 WO 2018006718 A1 WO2018006718 A1 WO 2018006718A1 CN 2017089980 W CN2017089980 W CN 2017089980W WO 2018006718 A1 WO2018006718 A1 WO 2018006718A1
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WO
WIPO (PCT)
Prior art keywords
post
aftertreatment device
space
carrier
opening
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.)
Ceased
Application number
PCT/CN2017/089980
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English (en)
Chinese (zh)
Inventor
王聪
孙小冈
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tenneco Suzhou Emission System Co Ltd
Original Assignee
Tenneco Suzhou Emission System Co Ltd
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 Tenneco Suzhou Emission System Co Ltd filed Critical Tenneco Suzhou Emission System Co Ltd
Publication of WO2018006718A1 publication Critical patent/WO2018006718A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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 invention relates to an exhaust gas aftertreatment device, and belongs to the technical field of engine exhaust aftertreatment.
  • the uniformity of ammonia distribution in the exhaust gas aftertreatment system (eg, selective catalytic reduction system, SCR system) has an important impact on the overall performance and durability of the system. If the ammonia distribution is uneven, it will lead to excessive ammonia in the local area and easy to cause ammonia leakage, while in other thin ammonia regions, the nitrogen oxide (NOx) conversion efficiency is too low. Uneven distribution of ammonia over a long period of time can result in uneven aging of the catalyst, thereby affecting the overall performance of the catalyst. In addition, the uneven distribution of urea droplets may cause the local tube wall or mixed structure temperature to be too low to form crystallization, which may block the tail gas pipe when severe, resulting in a decrease in engine power performance.
  • SCR system selective catalytic reduction system
  • the combination of the mixing tube and the double tube can better improve the mixing effect of the urea droplets and the exhaust gas.
  • limited by space it is often difficult to optimize the design of the mixing tube, so that the application range is limited to a certain extent.
  • an exhaust gas after-treatment device comprising a casing, a first post-processing carrier located in the casing, a second post-processing carrier located in the casing, and being installed on a mixer assembly in the housing, wherein the first post-treatment carrier is located upstream of the second post-treatment carrier, the mixer assembly being located in the first post-treatment carrier and the second post-treatment carrier
  • the mixer assembly includes a mixing tube and a partition cooperating with the mixing tube, the partition separating the housing into a first space in communication with the first post-treatment carrier and a second space in which the second post-treatment carrier communicates, the mixing tube including a first tube portion located in the first space and a second tube portion located in the second space, wherein the first tube The portion is provided with a plurality of swirling fins, and the second tubular portion is provided with a first opening and a second opening respectively located on both sides to form a double swirling flow.
  • the partition plate comprises a first plate on one side of the mixing tube, a second plate on the other side of the mixing tube, and a connection between the first plate and the A third plate of the second plate is provided, and the third plate is provided with a through hole through which the mixing tube passes.
  • the separator has an S shape.
  • the mixer assembly includes a bowl cover at the bottom of the mixing tube.
  • the first opening and the second opening each extend downward through the second tube portion, and the bowl cover is fixed at a lower end of the second tube portion, the bowl cover An arcuate projection extending into the second tube portion is provided.
  • the exhaust gas aftertreatment device is provided with a nozzle mount for mounting a urea nozzle to spray the atomized urea solution into the mixing tube.
  • the first tube portion of the mixing tube includes a plurality of perforations located above the swirling sheet and adjacent to the nozzle mounting seat, the perforations being in communication with the first space.
  • the first opening and the second opening are both rectangular.
  • the first post-processing carrier and the second post-processing carrier are axially aligned with each other.
  • the mixing tube is perpendicular to the housing.
  • the present invention increases the distance and time of urea evaporation by forming a secondary swirling flow, improves the uniformity of gas flow mixing, and reduces the risk of urea crystallization.
  • Figure 1 is a perspective view of an exhaust gas aftertreatment device of the present invention.
  • Fig. 2 is a partially exploded perspective view of Fig. 1;
  • Figure 3 is a further exploded perspective view of Figure 2.
  • FIG. 4 is an exploded perspective view of the mixer assembly and nozzle mount of FIG. 3.
  • Figure 5 is an exploded perspective view of another angle of Figure 4.
  • Figure 6 is a cross-sectional view taken along line A-A of Figure 1.
  • Figure 7 is a cross-sectional view taken along line B-B of Figure 1.
  • the present invention discloses an exhaust aftertreatment device 100 for treating the exhaust of an engine.
  • the exhaust aftertreatment device 100 includes a housing 1 , a first post-processing carrier 21 located in the housing 1 , a second post-processing carrier 22 located in the housing 1 , and a housing 1 mounted therein Mixer component 3.
  • the first post-processing carrier 21 is located upstream of the second post-processing carrier 22, and the mixer assembly 3 is located between the first post-processing carrier 21 and the second post-processing carrier 22.
  • the first aftertreatment carrier 21 and the second aftertreatment carrier 22 are axially aligned with one another.
  • the mixer assembly 3 includes a mixing tube 31, a partition 32 that cooperates with the mixing tube 31, and a bowl lid 33 at the bottom of the mixing tube 31.
  • the mixing tube 31 is perpendicular to the housing 1.
  • the exhaust gas after-treatment device 100 is provided with a nozzle mount 11 for mounting a urea nozzle to inject a urea solution after atomization into the mixing tube 31.
  • the partition 32 is S-shaped, which partitions the casing 1 into a first space 321 that communicates with the first after-treatment carrier 21 and a second space that communicates with the second after-treatment carrier 22 322.
  • the partition plate 32 includes a first plate 323 on one side of the mixing tube 31, a second plate 324 on the other side of the mixing tube 31, and a connection between the first plate 323 and the second A third plate 325 of the plate 324, the third plate 325 is provided with a through hole 326 through which the mixing tube 31 passes.
  • the first plate 323 and/or the second plate 324 may also be provided with a plurality of perforations to adjust the back pressure.
  • the mixing tube 31 includes a first tube portion 311 located in the first space 321 and a second tube portion 312 located in the second space 322.
  • the first tube portion 311 is provided with a plurality of swirling fins 3111 and a plurality of perforations 3112 located above the swirling fins 3111 and adjacent to the nozzle mounting seat 11.
  • the through hole 3112 is in communication with the first space 321 .
  • the second tube portion 312 is provided with a first opening 3121 and a second opening 3122 which are respectively located on both sides and are used to form a double swirl.
  • the first opening 3121 and the second opening 3122 each extend downward through the second tube portion 312.
  • the first opening 3121 and the second opening 3122 are each rectangular.
  • the bowl cover 33 is fixed to the lower end of the second tube portion 312, and the bowl cover 33 is provided with a circular arc-shaped protrusion 331 extending into the second tube portion 312 to guide the reverse flow of the airflow. Through the first opening 3121 and the second opening 3122.
  • the bowl lid 33 prevents the urea solution from being directly sprayed onto the exhaust pipe, thereby reducing the risk of urea crystallization.
  • the exhaust gas of the engine passes through the first after-treatment carrier 21 into the first space 321, most of the exhaust gas is rotated under the guidance of the swirling plate 3111 into the mixing tube 31.
  • a small amount of exhaust gas enters the mixing tube 31 from the perforation 3112.
  • the urea nozzle injects urea into the mixing tube 31, the atomized urea droplets and the engine
  • the exhaust gases are mixed together and rotated downstream. Referring to the spiral arrow in FIG. 7, then, under the blockage of the bowl cover 33, the airflow is better reversed (for example, upstream); the airflow after the reverse direction passes through the first opening 3121 and the second opening. 3122 to form a double swirl.
  • the gas stream then enters the second space 322 and reaches the second post-treatment carrier 22 located downstream.
  • the distance and time of urea evaporation are increased, the uniformity of gas flow mixing is improved, and the risk of urea crystallization is reduced.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (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 dispositif de post-traitement de gaz résiduaire, comprenant un boîtier (1), un premier support de post-traitement (21), un second support de post-traitement (22) et un ensemble mélangeur (3). L'ensemble mélangeur (3) est situé entre le premier support de post-traitement (21) et le second support de post-traitement (22). L'ensemble mélangeur (3) comprend un tuyau de mélange (31) et une plaque déflectrice (32) coopérant avec le tuyau de mélange (31). La plaque déflectrice (32) divise le boîtier en un premier espace (321) en communication avec le premier support de post-traitement (21) et un second espace (322) en communication avec le second support de post-traitement (22). Le tuyau de mélange (31) comprend une première partie de tuyau (311) située à l'intérieur du premier espace (321) et une seconde partie de tuyau (312) située à l'intérieur du second espace (322). La première partie de tuyau (311) est pourvue de plusieurs plaques de tourbillonnement (3111), et la seconde partie de tuyau (312) est pourvue d'une première ouverture (3121) et d'une seconde ouverture (3122) situées respectivement sur deux côtés et utilisées pour former des tourbillons doubles. Avec un tourbillon secondaire formé par le dispositif de post-traitement de gaz résiduaire, la distance et le temps d'évaporation de l'urée sont augmentés, l'uniformité du mélange d'air est améliorée et le risque de cristallisation de l'urée est réduit.
PCT/CN2017/089980 2016-07-08 2017-06-26 Dispositif de post-traitement de gaz résiduaire Ceased WO2018006718A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201620718848.2U CN205779158U (zh) 2016-07-08 2016-07-08 尾气后处理装置
CN201620718848.2 2016-07-08

Publications (1)

Publication Number Publication Date
WO2018006718A1 true WO2018006718A1 (fr) 2018-01-11

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CN (1) CN205779158U (fr)
WO (1) WO2018006718A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109356693A (zh) * 2018-11-13 2019-02-19 浙江银轮机械股份有限公司 一种紧凑式混合器组件
CN110056414A (zh) * 2018-01-19 2019-07-26 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN110439658A (zh) * 2019-08-12 2019-11-12 郑州精益达环保科技有限公司 一种国六scr前端尿素混合结构
CN117514426A (zh) * 2023-12-12 2024-02-06 无锡威孚力达催化净化器有限责任公司 一种筒式尿素混合装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205779158U (zh) * 2016-07-08 2016-12-07 天纳克（苏州）排放系统有限公司 尾气后处理装置
GB2557651B (en) * 2016-12-14 2019-08-21 Perkins Engines Co Ltd Pipe mixer for an aftertreatment system
CN106640301B (zh) * 2017-02-22 2025-02-18 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN109915236B (zh) * 2017-12-13 2024-10-22 天纳克（苏州）排放系统有限公司 尾气后处理混合装置
CN109989810B (zh) * 2017-12-29 2024-10-22 天纳克（苏州）排放系统有限公司 尾气后处理混合装置及其封装
CN110056410A (zh) * 2018-01-19 2019-07-26 天纳克（苏州）排放系统有限公司 排气后处理装置
CN110056412B (zh) * 2018-01-19 2024-10-22 天纳克（苏州）排放系统有限公司 排气后处理装置
CN109653849B (zh) * 2019-01-28 2024-07-19 凯龙高科技股份有限公司 一种用于柴油机尾气后处理的尿素喷射双层管混合器
CN111425284B (zh) * 2020-05-07 2025-10-28 天纳克（苏州）排放系统有限公司 尾气后处理混合装置以及尾气后处理装置

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE102009036511A1 (de) * 2009-08-07 2011-02-10 Friedrich Boysen Gmbh & Co. Kg Abgasanlage
CN103282616A (zh) * 2011-12-27 2013-09-04 株式会社小松制作所 还原剂水溶液混合装置及废气后处理装置
DE102012010878A1 (de) * 2012-06-01 2013-12-05 Daimler Ag Reduktionsmittelzugabe- und Aufbereitungssystem eines Kraftfahrzeugs
CN204646380U (zh) * 2015-05-13 2015-09-16 天纳克（苏州）排放系统有限公司 双层混合管及其排气处理装置
CN105452624A (zh) * 2013-08-05 2016-03-30 天纳克汽车经营有限公司 轴流式雾化模块
CN105673150A (zh) * 2016-04-11 2016-06-15 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN205779158U (zh) * 2016-07-08 2016-12-07 天纳克（苏州）排放系统有限公司 尾气后处理装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009036511A1 (de) * 2009-08-07 2011-02-10 Friedrich Boysen Gmbh & Co. Kg Abgasanlage
CN103282616A (zh) * 2011-12-27 2013-09-04 株式会社小松制作所 还原剂水溶液混合装置及废气后处理装置
DE102012010878A1 (de) * 2012-06-01 2013-12-05 Daimler Ag Reduktionsmittelzugabe- und Aufbereitungssystem eines Kraftfahrzeugs
CN105452624A (zh) * 2013-08-05 2016-03-30 天纳克汽车经营有限公司 轴流式雾化模块
CN204646380U (zh) * 2015-05-13 2015-09-16 天纳克（苏州）排放系统有限公司 双层混合管及其排气处理装置
CN105673150A (zh) * 2016-04-11 2016-06-15 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN205779158U (zh) * 2016-07-08 2016-12-07 天纳克（苏州）排放系统有限公司 尾气后处理装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110056414A (zh) * 2018-01-19 2019-07-26 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN109356693A (zh) * 2018-11-13 2019-02-19 浙江银轮机械股份有限公司 一种紧凑式混合器组件
CN109356693B (zh) * 2018-11-13 2024-01-26 浙江银轮机械股份有限公司 一种紧凑式混合器组件
CN110439658A (zh) * 2019-08-12 2019-11-12 郑州精益达环保科技有限公司 一种国六scr前端尿素混合结构
CN117514426A (zh) * 2023-12-12 2024-02-06 无锡威孚力达催化净化器有限责任公司 一种筒式尿素混合装置

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