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WO2019140894A1 - Dispositif de post-traitement de gaz d'échappement - Google Patents

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

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Publication number
WO2019140894A1
WO2019140894A1 PCT/CN2018/100391 CN2018100391W WO2019140894A1 WO 2019140894 A1 WO2019140894 A1 WO 2019140894A1 CN 2018100391 W CN2018100391 W CN 2018100391W WO 2019140894 A1 WO2019140894 A1 WO 2019140894A1
Authority
WO
WIPO (PCT)
Prior art keywords
aftertreatment
exhaust
mixing tube
cavity
mixing
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/CN2018/100391
Other languages
English (en)
Chinese (zh)
Inventor
李军良
王聪
吴健
王伟
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 WO2019140894A1 publication Critical patent/WO2019140894A1/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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • 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
    • F01N3/18—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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • 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
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device

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 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
  • An object of the present invention is to provide an exhaust aftertreatment device capable of uniformly mixing an exhaust gas of an engine with urea droplets.
  • an exhaust aftertreatment device including a first aftertreatment assembly, an exhaust inlet in communication with the first aftertreatment assembly, and the first aftertreatment a second aftertreatment component arranged side by side of the assembly, an exhaust outlet in communication with the second aftertreatment component, and a mixing chamber assembly connecting the first and second aftertreatment components
  • the mixing chamber assembly including a housing and a mixer located within the housing, wherein the housing is provided with a first opening, a second opening located beside the first opening, for mounting a urea nozzle to inject urea droplets onto the mixer a mount and a cavity connecting the first opening and the second opening
  • the mixer including a mixing tube located in the cavity and a partition fixing the mixing tube in the cavity
  • the partition partitions the cavity into a first cavity and a second cavity
  • the mixing tube includes a first tube portion located in the first cavity, wherein the first tube portion is respectively located At least two air flows on both sides Port, so that the gas stream to form a dual swirling manner into the inlet gas stream
  • the first post-processing component is arranged in parallel with the second post-processing component, the first post-processing component is provided with a first axis, and the mixing pipe is provided with a second axis.
  • the first axis is perpendicular to the second axis.
  • the mixing tube is adjacent to the mounting seat, and the urea nozzle is used to inject urea droplets into the mixing tube.
  • the first pipe portion is provided with a cleaning hole close to the mounting seat for a small amount of exhaust gas to enter the mixing pipe from the cleaning hole.
  • the mixing tube is in communication with the second cavity.
  • the partition plate is provided with an opening corresponding to the mixing tube.
  • the mixing tube at least partially passes through the partition.
  • the mixer is further provided with steel wool fixed in the mixing tube, the steel wool is used for the exhaust gas and the urea droplets to pass through to further increase The urea droplets are broken and evaporated.
  • the exhaust aftertreatment device has a U shape
  • the first aftertreatment component includes a diesel oxidation catalyst and a diesel particulate trap located downstream of the diesel oxidation catalyst, the first The secondary aftertreatment component includes a selective catalytic reducing agent.
  • the present invention divides the cavity into a first cavity and a second cavity by providing a partition, wherein the first pipe of the mixing pipe is provided with at least two air flows respectively on both sides thereof
  • the inlet allows the gas stream to enter the gas stream inlet in a manner that forms a double swirl.
  • Figure 1 is a perspective view of an exhaust aftertreatment device of the present invention.
  • Figure 2 is a perspective view of another angle of Figure 1.
  • Fig. 3 is a front view of Fig. 2;
  • Figure 4 is a rear elevational view of Figure 2.
  • Figure 5 is a plan view of Figure 2 .
  • Figure 6 is a bottom plan view of Figure 2 .
  • Figure 7 is a left side view of Figure 2.
  • Figure 8 is a right side view of Figure 2.
  • Figure 9 is a schematic cross-sectional view taken along line A-A of Figure 7.
  • Figure 10 is a cross-sectional view taken along line B-B of Figure 5.
  • Figure 11 is a partially exploded view of Figure 1.
  • Figure 12 is a partially exploded view of another angle of Figure 11;
  • Figure 13 is a further exploded perspective view of Figure 12 .
  • the present invention discloses an exhaust aftertreatment device 200 including a first aftertreatment assembly 300, an exhaust inlet 301 in communication with the first aftertreatment assembly 300, and a second aftertreatment component 400 in which the first aftertreatment assembly 300 is arranged side by side, an exhaust outlet 401 in communication with the second aftertreatment component 400, and an interface connecting the first and second aftertreatment components 300, 400
  • the mixing chamber assembly 100 the exhaust aftertreatment device 200 is U-shaped, and the first aftertreatment assembly 300 includes a diesel oxidation catalyst (DOC) and diesel particulates located downstream of the diesel oxidation catalyst.
  • a collector (DPF) the second aftertreatment component 400 comprising a selective catalytic reducing agent (SCR).
  • the mixing chamber assembly 100 includes a housing 1 and a mixer 2 mounted within the housing 1.
  • the housing 1 is provided with an end plate 11, a housing 12 that mates with the end plate 11, and a cavity 13 located within the housing 12.
  • the end plate 11 is provided with a first opening 111 and a second opening 112 located below the first opening 111.
  • the first opening 111 is for supplying airflow
  • the second opening 112 is for supplying airflow.
  • a mount 121 is welded to the top of the outer casing 12.
  • the mount 121 is for mounting a urea nozzle (not shown) to inject urea droplets into the mixer 2.
  • the cavity 13 communicates with the first opening 111 and the second opening 112.
  • the mixer 2 includes a mixing tube 21 located within the cavity 13 and a partition 22 that secures the mixing tube 21 in the cavity 13.
  • the partition 22 divides the cavity 13 into a first cavity 131 that communicates with the first opening 111 and a second cavity 132 that communicates with the second opening 112.
  • the mixing tube 21 includes a first tube portion 211 located in the first cavity 131, wherein the first tube portion 211 is provided with at least two airflow inlets 212 respectively on both sides thereof, so that the airflow to form a double A swirling manner enters the airflow inlet 212. This arrangement increases the distance and time for urea evaporation, improves the uniformity of airflow mixing, and improves the resistance to crystallization.
  • the mixing tube 21 is adjacent to the mount 121 for injecting urea droplets into the mixing tube 21.
  • the first pipe portion 211 is provided with a cleaning hole 213 close to the mounting seat 121 to allow a small amount of exhaust gas to enter the mixing pipe 21 from the cleaning hole 213, thereby reducing the risk of urea crystallization.
  • the mixing tube 21 is in communication with the second cavity 132.
  • the partition 22 is provided with an opening 23 corresponding to the mixing tube 21. In the illustrated embodiment of the invention, the mixing tube 21 at least partially passes through the partition 22.
  • the mixer 2 is further provided with a steel wool 24 fixed in the mixing tube 21 for passing the exhaust gas and the urea droplets to further increase the urea droplets Broken and evaporated.
  • the first post-processing assembly 300 is disposed in parallel with the second post-processing assembly 400.
  • the first post-processing assembly 300 is provided with a first axis S1
  • the mixing tube 21 is provided with a second axis S2.
  • An axis S1 is perpendicular to the second axis S2.

Landscapes

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

Abstract

L'invention concerne un dispositif de post-traitement de gaz d'échappement (200), comprenant un premier ensemble de post-traitement (300), une entrée de gaz d'échappement (301), un second ensemble de post-traitement (400), une sortie de gaz d'échappement (401), et un ensemble chambre de mélange (100). L'ensemble chambre de mélange (100) comprend un boîtier (1) et un mélangeur (2) disposé à l'intérieur du boîtier (1). Le mélangeur (2) comprend un tube de mélange (21) et une plaque de séparation (22) pour fixer le tube de mélange (32) dans une chambre (13), et la plaque de séparation (22) sépare la chambre en une première chambre (131) et une seconde chambre (132) ; et le tube de mélange (21) comprend une première partie de tube (211) située dans la première chambre (131), la première partie de tube (211) étant pourvue d'au moins deux entrées d'écoulement de gaz (212) situées sur deux côtés de celle-ci, de telle sorte que le flux de gaz entre dans les entrées d'écoulement de gaz (212) sous la forme d'un double flux tourbillonnant. Grâce à ce dispositif de post-traitement de gaz d'échappement, la distance d'évaporation et le temps d'urée sont augmentés, et l'uniformité de mélange du flux de gaz est améliorée.
PCT/CN2018/100391 2018-01-19 2018-08-14 Dispositif de post-traitement de gaz d'échappement Ceased WO2019140894A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810054123.1 2018-01-19
CN201810054123.1A CN110056410A (zh) 2018-01-19 2018-01-19 排气后处理装置

Publications (1)

Publication Number Publication Date
WO2019140894A1 true WO2019140894A1 (fr) 2019-07-25

Family

ID=67301267

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/100391 Ceased WO2019140894A1 (fr) 2018-01-19 2018-08-14 Dispositif de post-traitement de gaz d'échappement

Country Status (2)

Country Link
CN (1) CN110056410A (fr)
WO (1) WO2019140894A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112324551A (zh) * 2020-11-26 2021-02-05 天纳克（苏州）排放系统有限公司 箱体式的尾气后处理封装

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060156712A1 (en) * 2005-01-17 2006-07-20 Rudolf Buhmann Exhaust gas treatment system
US20100186381A1 (en) * 2009-01-26 2010-07-29 Caterpillar Inc Exhaust system thermal enclosure
CN105392972A (zh) * 2013-04-11 2016-03-09 珀金斯发动机有限公司 排放净化模块
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
CN107255043A (zh) * 2017-07-27 2017-10-17 天纳克（苏州）排放系统有限公司 发动机排气后处理封装及应用

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN107489500B (zh) * 2016-06-13 2021-03-16 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN108930575A (zh) * 2017-06-14 2018-12-04 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
CN207813702U (zh) * 2018-01-19 2018-09-04 天纳克（苏州）排放系统有限公司 排气后处理装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060156712A1 (en) * 2005-01-17 2006-07-20 Rudolf Buhmann Exhaust gas treatment system
US20100186381A1 (en) * 2009-01-26 2010-07-29 Caterpillar Inc Exhaust system thermal enclosure
CN105392972A (zh) * 2013-04-11 2016-03-09 珀金斯发动机有限公司 排放净化模块
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
CN107255043A (zh) * 2017-07-27 2017-10-17 天纳克（苏州）排放系统有限公司 发动机排气后处理封装及应用

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