WO2017215461A1 - Appareil de post-traitement des gaz d'échappement - Google Patents

Appareil de post-traitement des gaz d'échappement Download PDF

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Publication number
WO2017215461A1
WO2017215461A1 PCT/CN2017/086995 CN2017086995W WO2017215461A1 WO 2017215461 A1 WO2017215461 A1 WO 2017215461A1 CN 2017086995 W CN2017086995 W CN 2017086995W WO 2017215461 A1 WO2017215461 A1 WO 2017215461A1
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WO
WIPO (PCT)
Prior art keywords
mixing
mixing chamber
tube
housing
pipe
Prior art date
Application number
PCT/CN2017/086995
Other languages
English (en)
Chinese (zh)
Inventor
曹刚
王江华
王平
华滑辉
Original Assignee
天纳克（苏州）排放***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
Priority claimed from CN201610428578.6A external-priority patent/CN107514305B/zh
Application filed by 天纳克（苏州）排放***有限公司 filed Critical 天纳克（苏州）排放***有限公司
Publication of WO2017215461A1 publication Critical patent/WO2017215461A1/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]
    • 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 aftertreatment device including a first mixing chamber assembly, a second mixing chamber assembly located downstream of the first mixing chamber assembly, and the second mixing a catalyst carrier assembly downstream of the chamber assembly
  • the first mixing chamber assembly including a first housing having a first mixing chamber, an inlet tube in communication with the first mixing chamber, and at least partially located within the first mixing chamber a first mixing tube, the first mixing tube is provided with a first tube body located in the first mixing chamber and a second tube body extending out of the first mixing chamber, wherein the first tube body
  • the side wall is provided with a plurality of swirling sheets;
  • the second mixing chamber assembly includes a second housing and a second mixing tube located in the second housing, the second mixing tube is disposed opposite to the first mixing
  • the tube is a shroud that forces the flow of gas to flow in the opposite direction, and the first housing and the second housing are spaced apart from each other.
  • the first housing is provided with a first flange
  • the first mixing chamber assembly is provided with a second flange fixed to the intake pipe, the first flange
  • the second flange is detachably coupled by bolts.
  • the intake pipe is arranged side by side and parallel to the first mixing pipe, and the intake pipe is provided with an intake cone, a porous pipe matched with the intake cone, and a perforated tube mating blind flange plate, the perforated tube being located in the first mixing chamber, the inlet cone being located on one side of the perforated tube, and the blind flange plate being located in the porous tube One side, wherein the inlet cone and the blind flange plate are detachably coupled to the first housing.
  • the first housing is provided with a mounting seat for mounting a urea nozzle to inject urea into the first mixing tube; a sidewall of the first tube body is disposed adjacent to the a plurality of openings of the swirl sheet, the openings being adjacent to the mount and in communication with the first mixing chamber.
  • the first mixing chamber assembly is provided with a third flange welded to the second tube body, and the second mixing chamber assembly is provided with the second housing.
  • the fourth flange the third flange and the fourth flange are detachably connected by bolts.
  • a first mixing space is disposed between the second pipe body and the second mixing pipe, and a second space is disposed between the second mixing pipe and the second casing. Mixed space.
  • the shroud has a bowl shape and is provided with a curved end wall.
  • the second mixing chamber assembly is provided with a first support plate supporting the second mixing tube, and the second mixing tube passes through the first support plate, the first A first gap for airflow therethrough is provided between the support plate and the inner wall of the second housing.
  • the second mixing chamber assembly is provided with a second support plate supporting the second mixing tube, and the second mixing tube passes through the second support plate, the first The support plate and the second support plate are parallel to each other, and a second gap through which the airflow passes is disposed between the second support plate and the inner wall of the second casing.
  • the catalyst carrier assembly includes a selective catalytic reducing agent, and the catalyst carrier assembly is detachably coupled to the second housing.
  • the present invention separates the first casing from the second casing, and the first pipe body of the first mixing pipe is disposed outside the second casing and passes through the first casing.
  • the body is shielded, so the structural design of the swirling sheet on the first pipe body can be flexibly adjusted according to design requirements, and the size limitation caused by the entire design of the first mixing pipe in a single casing is avoided in the prior art.
  • Figure 1 is a perspective view of a tail gas aftertreatment device of the present invention in a first embodiment.
  • Fig. 2 is a partially exploded perspective view of Fig. 1;
  • FIG. 3 is an exploded perspective view of a portion of the first mixing chamber assembly of FIG. 2.
  • Figure 4 is an exploded perspective view of another angle of Figure 3.
  • Figure 5 is a partial exploded perspective view of Figure 1 with the second mixing chamber assembly exploded.
  • Figure 6 is a further exploded perspective view of the second mixing chamber assembly of Figure 5.
  • Figure 7 is an exploded perspective view of another angle of Figure 6.
  • Figure 8 is a right side view of Figure 1.
  • Figure 9 is a schematic cross-sectional view taken along line A-A of Figure 8.
  • Figure 10 is a perspective view of the exhaust gas aftertreatment device of the present invention in a second embodiment.
  • Figure 11 is a partially exploded perspective view of Figure 10.
  • Figure 12 is an exploded perspective view of a portion of the first mixing chamber assembly of Figure 11.
  • Figure 13 is an exploded perspective view of another angle of Figure 12;
  • Figure 14 is a partial exploded perspective view of Figure 10 with the second mixing chamber assembly exploded.
  • Figure 15 is a right side view of Figure 10.
  • Figure 16 is a cross-sectional view taken along line B-B of Figure 15.
  • the present invention discloses an exhaust aftertreatment device 100 for treating the exhaust of an engine.
  • the exhaust aftertreatment device 100 includes a first mixing chamber assembly 1, a second mixing chamber assembly 2 downstream of the first mixing chamber assembly 1, and a catalyst carrier assembly 3 downstream of the second mixing chamber assembly 2.
  • the catalyst support assembly 3 comprises a selective catalytic reducing agent.
  • the first mixing chamber assembly 1 includes a first housing 11 provided with a first mixing chamber 10, an intake tube 12 in communication with the first mixing chamber 10, and a portion at least partially located within the first mixing chamber 10.
  • a mixing tube 13 In the first embodiment of the present invention, the first housing 11 is provided with a first flange 111, and the first mixing chamber assembly 1 is provided with a second flange 112 fixed to the intake pipe 12, The first flange 111 and the second flange 112 are detachably coupled together by bolts 113. In this way, the direction of the intake pipe 12 can be adjusted by adjusting the mounting direction to suit different installation requirements.
  • the said A housing 11 is provided with a mount 114 for mounting a urea nozzle (not shown) for injecting urea into the first mixing tube 13.
  • the first mixing tube 13 is provided with a first tube body 131 located in the first mixing chamber 10 and a second tube extending out of the first mixing chamber 10 .
  • a tubular body 132 wherein the side wall of the first tubular body 131 is provided with a plurality of swirling fins 1311 and a plurality of openings 1312 located at two sides of the swirling fins 1311 and adjacent to the swirling fins 1311.
  • the opening 1312 of the side is adjacent to the mounting seat 114 and is in communication with the first mixing chamber 10.
  • the first mixing tube 13 has a cylindrical shape, and the first housing 11 is provided with an arc-shaped upper surface 115 such that the upper surface 115 and the first surface A curved cavity is formed between the mixing tubes 13 to facilitate the formation of a swirl.
  • the first mixing chamber assembly 1 is also provided with a third flange 116 welded to the second tubular body 132.
  • the second mixing chamber assembly 2 includes a second housing 21 , a second mixing tube 23 located in the second housing 21 , and a second mixing tube for supporting The first support plate 24 and the second support plate 25 of 23.
  • the first support plate 24 and the second support plate 25 are parallel to each other.
  • the second mixing chamber assembly 2 is provided with a fourth flange 211 welded to the second housing 21.
  • the first housing 11 and the second housing 21 are spaced apart from each other, and the third flange 116 and the fourth flange 211 are detachably coupled together by bolts 212.
  • the swirling sheet 1311 on the first tube body 131 is provided.
  • the structural design (for example, the length of the swirling fin 1311, the opening density, etc.) can be flexibly adjusted according to the design requirements, avoiding the size limitation caused by the entire design of the first mixing tube 13 in a single housing in the prior art.
  • the hybrid structure on the first tubular body 131 can be independently designed to avoid being limited by the size of the entire casing.
  • the mounting angle position of the second mixing chamber assembly 2 and the first mixing chamber assembly 1 can be adjusted by adjusting the matching hole position when the third flange 116 is bolted to the fourth flange 211. To adapt to different installation requirements.
  • the second tube 132 of the first mixing tube 13 at least partially extends into the second mixing tube 23, and the second mixing tube 23 is disposed opposite to the first mixing tube.
  • 13 is a shroud 231 that forces the flow of gas to flow in the opposite direction.
  • the shroud 231 is bowl-shaped and is provided with a curved end wall 2311.
  • a first mixing space 232 is disposed between the second tube 132 and the second mixing tube 23, and a second mixing space 233 is disposed between the second mixing tube 23 and the second housing 21.
  • the second mixing tube 23 passes through the first support plate 24 and the second support plate 25.
  • a first gap 241 through which the airflow passes is disposed between the first support plate 24 and the inner wall of the second casing 21.
  • a second gap 251 through which the airflow passes is disposed between the second support plate 25 and the inner wall of the second casing 21.
  • the exhaust gas post-treatment device 100 in the second embodiment of the present invention is larger than the first embodiment.
  • the difference is in the structure, installation direction and installation method of the intake pipe 12.
  • the intake pipe 12 is arranged side by side and in parallel with the first mixing pipe 13.
  • the intake pipe 12 is provided with an intake cone 121, a porous tube 122 that cooperates with the inlet cone 121, and a blind flange plate 123 that cooperates with the porous tube 122.
  • the porous tube 122 is located in the first mixing chamber 10
  • the inlet cone 121 is located on one side of the porous tube 122
  • the blind flange plate 123 is located on the other side of the porous tube 122.
  • the air inlet cone 121 and the blind flange plate 123 are both detachably coupled to the first housing 11. In this way, by changing the installation position of the intake cone 121 and the blind flange plate 123, the intake direction of the intake pipe 12 can be adjusted to adapt to different installation requirements.
  • the catalyst carrier assembly 3 includes a selective catalytic reducing agent, and the catalyst carrier assembly 3 and the second housing 21 are Disconnected together.

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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 appareil de post-traitement des gaz d'échappement (100), comprenant un premier ensemble de chambre de mélange (1), un second ensemble de chambre de mélange (2) et un ensemble de support de catalyseur (3). Le premier ensemble de chambre de mélange (1) comprend: une première chambre de mélange dans un premier boîtier , un tuyau d'entrée de gaz (12), et un premier tuyau de mélange (13) situé au moins partiellement dans la première chambre de mélange (10). Le premier tuyau de mélange (13) est pourvu d'un premier corps de tuyau (131) situé dans la première chambre de mélange (10), et d'un second corps de tuyau (132) s'étendant à partir de la première chambre de mélange (10), la paroi latérale du premier corps de tuyau (131) étant pourvue de plusieurs plaques de tourbillonnement d'écoulement (1311). Le second ensemble chambre de mélange (2) comprend un second boîtier (21) et un second tuyau de mélange (23). Le second tuyau de mélange (23) est pourvu d'un couvercle de guidage de flux (231) directement opposé au premier tuyau de mélange (13) de manière à forcer le flux de gaz à s'écouler dans une direction inverse. Les premier et second boîtiers sont espacés l'un de l'autre. Dans un tel agencement, la conception structurale des plaques de tourbillonnement d'écoulement (1311) sur le premier corps de tuyau (131) peut être réglée de manière flexible en fonction des exigences de conception. Cette conception structurale permet d'éviter le problème observé lors de la conception antérieure de la technique causé par le fait que la totalité du premier tuyau de mélange (13) était dans un seul boîtier.
PCT/CN2017/086995 2016-06-15 2017-06-02 Appareil de post-traitement des gaz d'échappement WO2017215461A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610428578.6 2016-06-15
CN201610428578.6A CN107514305B (zh) 2016-06-15 尾气后处理装置

Publications (1)

Publication Number Publication Date
WO2017215461A1 true WO2017215461A1 (fr) 2017-12-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108361735A (zh) * 2018-01-22 2018-08-03 南京航空航天大学 一种集导流和旋流一体化的叶栅式装置及燃烧室
FR3111664A1 (fr) * 2020-06-19 2021-12-24 Faurecia Systemes D'echappement Mélangeur de réducteur pour gaz d’échappement
CN114542248A (zh) * 2022-01-18 2022-05-27 潍柴动力股份有限公司 Scr***和发动机

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140023696A (ko) * 2012-08-17 2014-02-27 세종공업 주식회사 디젤 엔진의 배기가스 후처리 시스템
CN104196602A (zh) * 2014-03-06 2014-12-10 万向通达股份公司 车辆排放后处理器总成
CN104712401A (zh) * 2015-03-17 2015-06-17 天纳克（苏州）排放***有限公司 混合管及其排气处理装置
CN104832256A (zh) * 2015-05-13 2015-08-12 天纳克（苏州）排放***有限公司 双层混合管及其排气处理装置
CN105089750A (zh) * 2015-08-21 2015-11-25 天纳克（苏州）排放***有限公司 排气处理装置
CN105402009A (zh) * 2015-12-17 2016-03-16 无锡威孚力达催化净化器有限责任公司 Scr催化器集成喷射用螺旋式混合器
CN105569787A (zh) * 2015-12-17 2016-05-11 无锡威孚力达催化净化器有限责任公司 尿素喷嘴集成式scr催化转化器
CN205714374U (zh) * 2016-06-15 2016-11-23 天纳克（苏州）排放***有限公司 尾气后处理装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140023696A (ko) * 2012-08-17 2014-02-27 세종공업 주식회사 디젤 엔진의 배기가스 후처리 시스템
CN104196602A (zh) * 2014-03-06 2014-12-10 万向通达股份公司 车辆排放后处理器总成
CN104712401A (zh) * 2015-03-17 2015-06-17 天纳克（苏州）排放***有限公司 混合管及其排气处理装置
CN104832256A (zh) * 2015-05-13 2015-08-12 天纳克（苏州）排放***有限公司 双层混合管及其排气处理装置
CN105089750A (zh) * 2015-08-21 2015-11-25 天纳克（苏州）排放***有限公司 排气处理装置
CN105402009A (zh) * 2015-12-17 2016-03-16 无锡威孚力达催化净化器有限责任公司 Scr催化器集成喷射用螺旋式混合器
CN105569787A (zh) * 2015-12-17 2016-05-11 无锡威孚力达催化净化器有限责任公司 尿素喷嘴集成式scr催化转化器
CN205714374U (zh) * 2016-06-15 2016-11-23 天纳克（苏州）排放***有限公司 尾气后处理装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108361735A (zh) * 2018-01-22 2018-08-03 南京航空航天大学 一种集导流和旋流一体化的叶栅式装置及燃烧室
CN108361735B (zh) * 2018-01-22 2020-04-21 南京航空航天大学 一种集导流和旋流一体化的叶栅式装置及燃烧室
FR3111664A1 (fr) * 2020-06-19 2021-12-24 Faurecia Systemes D'echappement Mélangeur de réducteur pour gaz d’échappement
CN114542248A (zh) * 2022-01-18 2022-05-27 潍柴动力股份有限公司 Scr***和发动机

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