[go: up one dir, main page]

WO2019140865A1 - 尾气后处理装置 - Google Patents

尾气后处理装置 Download PDF

Info

Publication number
WO2019140865A1
WO2019140865A1 PCT/CN2018/093011 CN2018093011W WO2019140865A1 WO 2019140865 A1 WO2019140865 A1 WO 2019140865A1 CN 2018093011 W CN2018093011 W CN 2018093011W WO 2019140865 A1 WO2019140865 A1 WO 2019140865A1
Authority
WO
WIPO (PCT)
Prior art keywords
aftertreatment
carrier assembly
exhaust gas
exhaust
aftertreatment device
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/CN2018/093011
Other languages
English (en)
French (fr)
Inventor
李军良
王聪
毛伟
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 WO2019140865A1 publication Critical patent/WO2019140865A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • 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
    • 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
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1486—Means to prevent the substance from freezing

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. The uneven distribution of urea droplets will cause the local tube wall or mixed structure temperature to be too low to form crystallization. In severe cases, the tail gas pipe will be blocked, resulting in a decrease in engine power performance.
  • SCR system selective catalytic reduction system
  • an exhaust aftertreatment device including a first post-processing carrier assembly, a second post-processing carrier assembly, and the first post-processing carrier assembly and the second rear Processing a mixer assembly between the carrier assemblies, wherein the mixer assembly includes a housing, a mixing tube positioned within the housing, and a baffle secured to a periphery of the mixing tube, the baffle placing the housing Dividing into a first space in communication with the first post-processing carrier assembly and a second space in communication with the second post-processing carrier assembly, the mixing tube including a first tube portion located within the first space And a second tube portion located in the second space, wherein the first tube portion is provided with at least two first openings respectively located at two sides thereof, and the exhaust gas after-treatment device further comprises an occlusion in the first The first shutter portion of the front end of the opening and the second shutter portion are such that a majority of the exhaust flow needs to bypass the first and second shutter portions to enter the first opening.
  • the first post-treatment carrier assembly, the second post-treatment carrier assembly, and the mixer assembly are arranged in a straight line.
  • the housing is provided with a first axis
  • the mixing tube is provided with a second axis, the first axis intersecting the second axis.
  • the first axis is perpendicular to the second axis.
  • the first pipe portion includes a connecting portion between the first openings
  • the exhaust gas after-treatment device includes a shutter welded on the connecting portion, the first The shutter portion and the second shutter portion are located on both sides of the shutter.
  • the exhaust gas aftertreatment device is provided with a nozzle mounting seat on the casing and used to install a urea nozzle to spray the atomized urea solution into the mixing tube.
  • the exhaust gas after-treatment device further includes steel wool located in the mixing tube, wherein the steel wool is used for the exhaust gas and the urea liquid droplet to pass through to further increase The urea droplets are broken and evaporated.
  • the first post-treatment carrier assembly includes a diesel particulate filter
  • the second post-treatment carrier assembly includes a selective catalytic reducing agent
  • the exhaust aftertreatment device further includes an oxidation catalyst upstream of the first aftertreatment carrier assembly.
  • the first shutter portion is provided with a first circular arc edge that abuts against the inner side of the housing, and the second shutter portion is disposed to abut the inner side of the housing.
  • the second arc edge is provided.
  • the present invention rectifies by providing the first and second shielding portions, thereby improving the uniformity of the airflow distribution and improving the mixing effect.
  • Figure 1 is a perspective view of an exhaust gas aftertreatment device of the present invention.
  • Figure 2 is a perspective view of another angle of Figure 1.
  • Figure 3 is a partial exploded perspective view of Figure 1.
  • Figure 4 is a partially exploded perspective view of another angle of Figure 3.
  • Figure 5 is an exploded perspective view of the mixer assembly of Figure 3.
  • Figure 6 is an exploded perspective view of another angle of Figure 5.
  • Figure 7 is a front elevational view of Figure 1.
  • Figure 8 is a rear elevational view of Figure 1.
  • Figure 9 is a plan view of Figure 1.
  • Fig. 10 is a bottom view of Fig. 1;
  • Figure 11 is a left side view of Figure 2.
  • Figure 12 is a right side view of Figure 2.
  • Figure 13 is a cross-sectional view taken along line A-A of Figure 9.
  • Figure 14 is a cross-sectional view taken along line B-B of Figure 9.
  • Figure 15 is a schematic cross-sectional view taken along line C-C of Figure 13;
  • the present invention discloses an exhaust aftertreatment device 100 for treating exhaust gas of an engine to reduce emissions of harmful substances.
  • the exhaust aftertreatment device 100 includes a first aftertreatment carrier assembly 1, a second aftertreatment carrier assembly 2, and a mixer assembly between the first aftertreatment carrier assembly 1 and the second aftertreatment carrier assembly 2 3.
  • the first aftertreatment carrier assembly 1, the second aftertreatment carrier assembly 2, and the mixer assembly 3 are arranged in a straight line.
  • the first aftertreatment carrier assembly 1 includes a diesel particulate filter (DPF) 12
  • the second aftertreatment carrier assembly 2 includes a selective catalytic reduction agent (SCR) 21.
  • DPF diesel particulate filter
  • SCR selective catalytic reduction agent
  • the exhaust aftertreatment device 100 further includes an oxidation catalyst (DOC) 11 located upstream of the first aftertreatment carrier assembly 12.
  • DOC oxidation catalyst
  • the above oxidation catalyst 11, diesel particulate filter 12 and selective catalytic reducing agent 21 are detachably connected by a clamp for maintenance and replacement.
  • the mixer assembly 3 includes a housing 31, a mixing tube 32 located within the housing 31, a partition 33 fixed to the periphery of the mixing tube 32, steel wool 34 located in the mixing tube 32, and a cover Board 35.
  • the partition 33 divides the casing 31 into a first space 331 that communicates with the first aftertreatment carrier assembly 1 and a second space 332 that communicates with the second aftertreatment carrier assembly 2.
  • the mixing tube 32 includes a first tube portion 321 located in the first space 331 and a second tube portion 322 located in the second space 332, wherein the first tube portion 321 is respectively disposed at two of the tubes At least two first openings 3211 on the side and a connection portion 3212 between the first openings 3211.
  • the first opening 3211 is for entering airflow.
  • the shutter 35 is welded to the connecting portion 3212, and is provided with a first shutter portion 351 and a second shutter portion 352 on both sides.
  • the first shutter portion 351 and the second shutter portion 352 respectively block the front end of the first opening 3211, so that most of the exhaust flow needs to bypass the first and second shutter portions 351, 352 can enter the first opening 3211. This arrangement prevents the exhaust stream from directly rushing into the mixing tube 32 and forming a reflection on the tube wall, affecting the uniformity and smoothness of the airflow mixing.
  • the first shutter portion 351 is provided with a first circular arc edge 3511 that abuts against the inner side of the housing 31, and the second shutter portion 352 is disposed to be placed against The second circular arc edge 3521 inside the casing 31 has an effect of obstructing the airflow to rectify.
  • the housing 31 has a cylindrical shape and is provided with a first axis 311;
  • the mixing tube 32 has a cylindrical shape, and is provided with a second axis 323, the first The axis 311 intersects the second axis 323.
  • the first axis 311 is perpendicular to the second axis 323.
  • the housing 31 and the mixing tube 32 may have other shapes, such as an elliptical shape or the like.
  • the partition plate 33 includes a first plate 333 on one side of the mixing tube 32, a second plate 334 on the other side of the mixing tube 32, and a connection between the first plate 333 and the second A third plate 335 of the plate 334, the third plate 335 is provided with a through hole 336 through which the mixing tube 32 passes.
  • the mixing tube 32 is disposed obliquely; the first plate 333 is provided with a first curved surface 337 abutting against the first tube portion 321, and the second The plate 334 is provided with a second curved surface 338 that abuts against the second tube portion 322.
  • the exhaust aftertreatment device 100 is provided with a nozzle mount 310 on the housing 31 for mounting a urea nozzle to inject a urea solution after atomization into the mixing tube 32.
  • the exhaust gas bypasses the first and second shutters 351, 352 from the first
  • the opening 3211 enters the mixing tube 32.
  • the urea nozzle injects urea into the mixing tube 32, the atomized urea droplets are mixed with the exhaust of the engine and moved downstream, then exit the mixing tube 32 and enter the second space 332, and The second post-treatment carrier assembly 2 located downstream is reached. In this way, the distance and time of urea evaporation are increased by the swirling flow, the uniformity of the airflow mixing is improved, and the risk of urea crystallization is reduced.
  • the present invention utilizes the 3D porous structure or multi-voided structure of the steel wool 34, the exhaust gas and the urea droplets passing through the steel wool 34 to cause sufficient breakage and mixing of the urea droplets on the surface and inside of the steel wool.
  • the voids are complex, and the heat transfer area is large, which is beneficial to the full heat exchange between the urea droplets and the exhaust gas, thereby facilitating the evaporation and pyrolysis of the urea droplets and improving the resistance to crystallization.
  • the back pressure of the system can be adjusted accordingly by adjusting the density of the steel wool 34.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

一种尾气后处理装置，其包括第一后处理载体组件（1）、第二后处理载体组件（2）以及混合器组件（3），其中混合器组件（3）包括壳体（31）、位于壳体（31）内的混合管（32）以及隔板（33），隔板（33）将壳体（31）分隔成第一空间（331）以及第二空间（332），混合管（32）包括位于第一空间（331）内的第一管部（321）以及位于第二空间（332）内的第二管部（322），其中第一管部（321）设有分别位于其两侧的至少两个第一开口（3211），尾气后处理装置还包括分别遮挡在第一开口（3211）的前端的第一遮板部（351）以及第二遮板部（352）。如此设置，通过设置第一、第二遮板部进行整流，提高了气流分布的均匀性，提高了混合效果。

Description

尾气后处理装置
本申请要求了申请日为2018年1月19日、申请号为201810054166.X、发明名称为“尾气后处理装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种尾气后处理装置，属于发动机尾气后处理技术领域。
背景技术
研究表明尾气后处理系统(例如选择性催化还原系统，SCR系统)管路中氨分布的均匀程度对系统的整体性能和耐久性能有重要的影响。如果氨分布不均匀会导致局部区域氨过多从而易造成氨泄漏，而在另一些氨稀薄区域造成氮氧化合物(NOx)转化效率过低。长时间氨的不均匀分布会导致催化剂老化不均匀，从而影响催化剂的整体性能。尿素液滴的不均匀分布会造成局部管壁或混合结构温度过低，形成结晶，严重时会堵塞尾气管、导致发动机动力性能下降。
发明内容
本发明的目的在于提供一种混合效果较好的尾气后处理装置。
为实现上述目的，本发明采用如下技术方案：一种尾气后处理装置，其包括第一后处理载体组件、第二后处理载体组件以及位于所述第一后处理载体组件与所述第二后处理载体组件之间的混合器组件，其中所述混合器组件包括壳体、位于所述壳体内的混合管以及固定在所述混合管的外围的隔板，所述隔板将所述壳体分成与所述第一后处理载体组件相连通的第一空间以及与所述第二后处理载体组件相连通的第二空间，所述混合管包括位于所述第一空间内的第一管部以及位于所述第二空间内的第二管部，其中所述第一管部设有分别位于其两侧的至少两个第一开口，所述尾气后处理装置还包括分别遮挡在所述第一开口的前端的第一遮板部以及第二遮板部，使得绝大部分的排气流需要绕开所述第一、第二遮板部才能进入到所述第一开口中。
作为本发明进一步改进的技术方案，所述第一后处理载体组件、所述第二后处理载体组件以及 所述混合器组件布置在一条直线上。
作为本发明进一步改进的技术方案，所述壳体设有第一轴线，所述混合管设有第二轴线，所述第一轴线与所述第二轴线交叉。
作为本发明进一步改进的技术方案，所述第一轴线垂直于所述第二轴线。
作为本发明进一步改进的技术方案，所述第一管部包括位于所述第一开口之间的连接部，所述尾气后处理装置包括焊接在所述连接部上的遮板，所述第一遮板部与所述第二遮板部位于所述遮板的两侧。
作为本发明进一步改进的技术方案，所述尾气后处理装置设有位于所述壳体上且用以安装尿素喷嘴以将雾化之后的尿素溶液喷入所述混合管内的喷嘴安装座。
作为本发明进一步改进的技术方案，所述尾气后处理装置还包括位于所述混合管中的钢丝绒，所述钢丝绒用以供所述排气以及所述尿素液滴穿过，以进一步增加所述尿素液滴的破碎以及蒸发。
作为本发明进一步改进的技术方案，所述第一后处理载体组件包括柴油颗粒过滤器，所述第二后处理载体组件包括选择性催化还原剂。
作为本发明进一步改进的技术方案，所述尾气后处理装置还包括位于所述第一后处理载体组件的上游的氧化催化器。
作为本发明进一步改进的技术方案，所述第一遮板部设有贴靠在所述壳体内侧的第一圆弧边，所述第二遮板部设有贴靠在所述壳体内侧的第二圆弧边。
相较于现有技术，本发明通过设置第一、第二遮板部进行整流，提高了气流分布的均匀性，提高了混合效果。
附图说明
图1是本发明尾气后处理装置的立体示意图。
图2是图1另一角度的立体示意图。
图3是图1的部分立体分解图。
图4是图3另一角度的部分立体分解图。
图5是图3中混合器组件的立体分解图。
图6是图5另一角度的立体分解图。
图7是图1的主视图。
图8是图1的后视图。
图9是图1的俯视图。
图10是图1的仰视图。
图11是图2的左视图。
图12是图2的右视图。
图13是沿图9中A-A线的剖面示意图。
图14是沿图9中B-B线的剖面示意图。
图15是沿图13中C-C线的剖面示意图。
具体实施方式
请参图1至图15所示，本发明揭示了一种尾气后处理装置100，用以处理发动机的尾气以降低有害物质的排放。所述尾气后处理装置100包括第一后处理载体组件1、第二后处理载体组件2以及位于所述第一后处理载体组件1与所述第二后处理载体组件2之间的混合器组件3。在本发明图示的实施方式中，所述第一后处理载体组件1、所述第二后处理载体组件2以及所述混合器组件3布置在一条直线上。请参图13所示，所述第一后处理载体组件1包括柴油颗粒过滤器(DPF)12，所述第二后处理载体组件2包括选择性催化还原剂(SCR)21。在本发明图示的实施方式中，所述尾气后处理装置100还包括位于所述第一后处理载体组件12的上游的氧化催化器(DOC)11。上述氧化催化器11、柴油颗粒过滤器12以及选择性催化还原剂21通过卡箍进行可拆卸地连接，以便于维修与更换。
所述混合器组件3包括壳体31、位于所述壳体31内的混合管32、固定在所述混合管32的外围的隔板33、位于所述混合管32中的钢丝绒34以及遮板35。所述隔板33将所述壳体31分隔成与所述第一后处理载体组件1相连通的第一空间331以及与所述第二后处理载体组件2相连通的第二空间332。所述混合管32包括位于所述第一空间331内的第一管部321以及位于所述第二空间332内的第二管部322，其中所述第一管部321设有分别位于其两侧的至少两个第一开口3211以及位于所述第一开口3211之间的连接部3212。所述第一开口3211用以供气流进入。所述遮板35焊接在所述连接部3212上，其设有位于两侧的第一遮板部351与第二遮板部352。所 述第一遮板部351以及第二遮板部352分别遮挡在所述第一开口3211的前端，使得绝大部分的排气流需要绕开所述第一、第二遮板部351、352才能进入到所述第一开口3211中。如此设置，避免了排气流直接冲入混合管32中并在管壁上形成反射，影响气流混合的均匀性与平稳性。在本发明图示的实施方式中，所述第一遮板部351设有贴靠在所述壳体31内侧的第一圆弧边3511，所述第二遮板部352设有贴靠在所述壳体31内侧的第二圆弧边3521，对气流形成阻碍以起到整流的效果。
在本发明图示的实施方式中，所述壳体31呈圆筒状，其设有第一轴线311；所述混合管32呈圆筒状，其设有第二轴线323，所述第一轴线311与所述第二轴线323交叉。优选地，所述第一轴线311垂直于所述第二轴线323。当然，在其他实施方式中，所述壳体31与所述混合管32也可以是其他形状，例如椭圆形等。
所述隔板33包括位于所述混合管32一侧的第一板片333、位于所述混合管32另一侧的第二板片334以及连接所述第一板片333与所述第二板片334的第三板片335，所述第三板片335设有供所述混合管32穿过的通孔336。在本发明图示的实施方式中，所述混合管32倾斜布置；所述第一板片333设有贴靠在所述第一管部321上的第一弧形面337，所述第二板片334设有贴靠在所述第二管部322上的第二弧形面338。
所述尾气后处理装置100设有位于所述壳体31上且用以安装尿素喷嘴以将雾化之后的尿素溶液喷入所述混合管32内的喷嘴安装座310。
在本发明图示的实施方式中，当发动机的排气穿过第一后处理载体组件1进入到第一空间331内时，排气绕过第一、第二遮板351、352自第一开口3211进入混合管32。当满足喷射条件时，尿素喷嘴向混合管32中喷射尿素，雾化的尿素液滴与发动机的排气一起混合并向下游移动，随后离开所述混合管32进入到第二空间332内，并到达位于下游的第二后处理载体组件2。如此设置，通过旋流增加了尿素蒸发的距离和时间，提高了气流混合的均匀性，降低了尿素结晶的风险。
另外，本发明利用钢丝绒34的3D多孔结构或者多空隙结构，排气以及所述尿素液滴穿过钢丝绒34使尿素液滴在钢丝绒的表面和内部发生充分的破碎与混合。另外，由于钢丝绒的线径较小，空隙复杂，传热面积大，有利于尿素液滴与排气发生较充分的换热，从而利于尿素液滴的蒸发和热解，提高了抗结晶能力。通过对钢丝绒34的密度的调节可以相应地调整系统的背压。
另外，以上实施例仅用于说明本发明而并非限制本发明所描述的技术方案，对本说明书的理 解应该以所属技术领域的技术人员为基础，尽管本说明书参照上述的实施例对本发明已进行了详细的说明，但是，本领域的普通技术人员应当理解，所属技术领域的技术人员仍然可以对本发明进行修改或者等同替换，而一切不脱离本发明的精神和范围的技术方案及其改进，均应涵盖在本发明的权利要求范围内。

Claims (10)

  1. 一种尾气后处理装置，其包括第一后处理载体组件、第二后处理载体组件以及位于所述第一后处理载体组件与所述第二后处理载体组件之间的混合器组件，其中所述混合器组件包括壳体、位于所述壳体内的混合管以及固定在所述混合管的外围的隔板，所述隔板将所述壳体分成与所述第一后处理载体组件相连通的第一空间以及与所述第二后处理载体组件相连通的第二空间，所述混合管包括位于所述第一空间内的第一管部以及位于所述第二空间内的第二管部，其中所述第一管部设有分别位于其两侧的至少两个第一开口，其特征在于：所述尾气后处理装置还包括分别遮挡在所述第一开口的前端的第一遮板部以及第二遮板部，使得绝大部分的排气流需要绕开所述第一、第二遮板部才能进入到所述第一开口中。
  2. 如权利要求1所述的尾气后处理装置，其特征在于：所述第一后处理载体组件、所述第二后处理载体组件以及所述混合器组件布置在一条直线上。
  3. 如权利要求2所述的尾气后处理装置，其特征在于：所述壳体设有第一轴线，所述混合管设有第二轴线，所述第一轴线与所述第二轴线交叉。
  4. 如权利要求3所述的尾气后处理装置，其特征在于：所述第一轴线垂直于所述第二轴线。
  5. 如权利要求1所述的尾气后处理装置，其特征在于：所述第一管部包括位于所述第一开口之间的连接部，所述尾气后处理装置包括焊接在所述连接部上的遮板，所述第一遮板部与所述第二遮板部位于所述遮板的两侧。
  6. 如权利要求1所述的尾气后处理装置，其特征在于：所述尾气后处理装置设有位于所述壳体上且用以安装尿素喷嘴以将雾化之后的尿素溶液喷入所述混合管内的喷嘴安装座。
  7. 如权利要求6所述的尾气后处理装置，其特征在于：所述尾气后处理装置还包括位于所述混合管中的钢丝绒，所述钢丝绒用以供所述排气以及所述尿素液滴穿过，以进一步增加所述尿素液滴的破碎以及蒸发。
  8. 如权利要求1所述的尾气后处理装置，其特征在于：所述第一后处理载体组件包括柴油颗粒过滤器，所述第二后处理载体组件包括选择性催化还原剂。
  9. 如权利要求8所述的尾气后处理装置，其特征在于：所述尾气后处理装置还包括位于所述第一后处理载体组件的上游的氧化催化器。
  10. 如权利要求1所述的尾气后处理混合装置，其特征在于：所述第一遮板部设有贴靠在所述壳体内侧的第一圆弧边，所述第二遮板部设有贴靠在所述壳体内侧的第二圆弧边。
PCT/CN2018/093011 2018-01-19 2018-06-27 尾气后处理装置 Ceased WO2019140865A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810054166.XA CN110056414A (zh) 2018-01-19 2018-01-19 尾气后处理装置
CN201810054166.X 2018-01-19

Publications (1)

Publication Number Publication Date
WO2019140865A1 true WO2019140865A1 (zh) 2019-07-25

Family

ID=67301970

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/093011 Ceased WO2019140865A1 (zh) 2018-01-19 2018-06-27 尾气后处理装置

Country Status (2)

Country Link
CN (1) CN110056414A (zh)
WO (1) WO2019140865A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110259555A (zh) * 2019-07-31 2019-09-20 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN110397496A (zh) * 2019-07-31 2019-11-01 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN112796866A (zh) * 2021-02-04 2021-05-14 天纳克（苏州）排放系统有限公司 尾气后处理封装

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100005790A1 (en) * 2008-07-09 2010-01-14 Xiaogang Zhang Selective Catalytic Reduction (SCR) Catalyst Injection Systems
CN106640301A (zh) * 2017-02-22 2017-05-10 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN206487537U (zh) * 2017-02-22 2017-09-12 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN107559078A (zh) * 2017-09-29 2018-01-09 天纳克汽富晟(长春)汽车零部件有限公司 尾气后处理装置
CN107575287A (zh) * 2017-09-19 2018-01-12 天纳克（苏州）排放系统有限公司 尾气后处理混合装置
CN207178013U (zh) * 2017-09-19 2018-04-03 天纳克（苏州）排放系统有限公司 尾气后处理混合装置
CN207526559U (zh) * 2017-09-29 2018-06-22 天纳克一汽富晟(长春)汽车零部件有限公司 尾气后处理装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200440062Y1 (ko) * 2007-03-09 2008-05-28 주식회사 테스크 선별적탈질촉매가 구비된 디젤차량용 매연저감머플러
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
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
CN207879438U (zh) * 2018-01-19 2018-09-18 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
US20100005790A1 (en) * 2008-07-09 2010-01-14 Xiaogang Zhang Selective Catalytic Reduction (SCR) Catalyst Injection Systems
CN106640301A (zh) * 2017-02-22 2017-05-10 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN206487537U (zh) * 2017-02-22 2017-09-12 天纳克（苏州）排放系统有限公司 尾气后处理装置
CN107575287A (zh) * 2017-09-19 2018-01-12 天纳克（苏州）排放系统有限公司 尾气后处理混合装置
CN207178013U (zh) * 2017-09-19 2018-04-03 天纳克（苏州）排放系统有限公司 尾气后处理混合装置
CN107559078A (zh) * 2017-09-29 2018-01-09 天纳克汽富晟(长春)汽车零部件有限公司 尾气后处理装置
CN207526559U (zh) * 2017-09-29 2018-06-22 天纳克一汽富晟(长春)汽车零部件有限公司 尾气后处理装置

Also Published As

Publication number Publication date
CN110056414A (zh) 2019-07-26

Similar Documents

Publication Publication Date Title
CN107575287B (zh) 尾气后处理混合装置
WO2018153162A1 (zh) 尾气后处理装置
CN110080861B (zh) 排气后处理装置
WO2018149053A1 (zh) 尾气后处理装置
CN110080862A (zh) 排气后处理装置
WO2018006718A1 (zh) 尾气后处理装置
WO2019011036A1 (zh) 尾气后处理混合装置及其封装
WO2021189795A1 (zh) 柴油机尾气后处理装置
CN207813702U (zh) 排气后处理装置
CN107559078A (zh) 尾气后处理装置
WO2019140865A1 (zh) 尾气后处理装置
WO2017215461A1 (zh) 尾气后处理装置
WO2019140892A1 (zh) 排气后处理装置
CN108757109A (zh) U形排气后处理装置
CN207813703U (zh) 排气后处理装置
CN111485980A (zh) 混合组件
WO2019144599A1 (zh) 排气入口管及其排气后处理装置
CN207813701U (zh) 排气后处理装置
CN207178013U (zh) 尾气后处理混合装置
CN212027907U (zh) 尾气后处理混合装置以及尾气后处理装置
WO2019128164A1 (zh) 尾气后处理混合装置及其封装
CN211975121U (zh) 一种scr后处理装置及后处理进气混合装置
CN211422738U (zh) 一种柴油机后处理混合器
CN110056410A (zh) 排气后处理装置
CN110056412B (zh) 排气后处理装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18901208

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18901208

Country of ref document: EP

Kind code of ref document: A1