WO2019140864A1 - 发动机排气后处理装置 - Google Patents

发动机排气后处理装置 Download PDF

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Publication number
WO2019140864A1
WO2019140864A1 PCT/CN2018/093009 CN2018093009W WO2019140864A1 WO 2019140864 A1 WO2019140864 A1 WO 2019140864A1 CN 2018093009 W CN2018093009 W CN 2018093009W WO 2019140864 A1 WO2019140864 A1 WO 2019140864A1
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WIPO (PCT)
Prior art keywords
cavity
assembly
engine exhaust
aftertreatment
cavity assembly
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PCT/CN2018/093009
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English (en)
French (fr)
Inventor
王聪
王伟
毛伟
王天宇
殷雷
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天纳克（苏州）排放系统有限公司
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Publication of WO2019140864A1 publication Critical patent/WO2019140864A1/zh

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    • 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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 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
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the present invention relates to an engine exhaust aftertreatment device.
  • Engine exhaust aftertreatment devices 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 device including a first aftertreatment component, a first 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 cavity component in communication with the second aftertreatment component, and a third cavity component in communication with the first and second cavity components;
  • a post-processing component and the second post-processing component are connected in series by the first, second, and third cavity components;
  • the second cavity component includes a housing having an inner cavity and is located in the inner cavity a baffle in the body, wherein the baffle partitions the inner cavity into a connecting cavity located inside the baffle and communicating the third cavity component and the second post-processing component and a cavity on an outer side of the baffle, the baffle including a shroud at an end of the third cavity assembly and a plate portion extending from the shroud;
  • the third The cavity assembly includes a communication with the first cavity assembly a mixing tube comprising an inner cavity, a pluralit
  • the second cavity assembly includes a distribution plate located downstream of the baffle, and the distribution plate is provided with a plurality of through holes for the passage of a mixture of exhaust gas and urea droplets.
  • the mixing tube includes a tapered portion, and the fin and the groove are both disposed on the tapered portion.
  • the tapered portion is separately formed from the mixing tube and then fixed together.
  • an engine exhaust aftertreatment device includes a mounting portion mounted on the first cavity assembly and configured to mount a urea nozzle for injecting urea into the porous tube Droplet.
  • the porous tube includes a first end and a second end opposite the first end, wherein the second end is open.
  • the porous tube at least partially overlaps the tapered portion along an axial direction thereof.
  • the first end of the porous tube and the tapered portion are both fixed inside the first cavity assembly.
  • the porous tube has a cylindrical shape, and the second end is provided with a plurality of outwardly expanding claws, and the plurality of claws are welded and fixed on the inner wall of the mixing tube. A groove is formed between the adjacent two claw portions for the airflow to pass therethrough.
  • 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 present invention can make the exhaust gas enter the carrier of the second after-treatment component relatively uniformly by providing the baffle plate; in addition, by providing the porous pipe, the crushing of the urea droplets and the wall surface thereof are enhanced.
  • the heat transfer effect reduces the risk of urea crystallization.
  • Figure 1 is a perspective view of an engine exhaust 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.
  • Fig. 4 is a partially exploded perspective view of Fig. 2;
  • Figure 5 is a right side view of Figure 1.
  • Figure 6 is a front elevational view of Figure 1.
  • Figure 7 is a schematic cross-sectional view taken along line A-A of Figure 6.
  • Figure 8 is a cross-sectional view taken along line B-B of Figure 6.
  • Figure 9 is an exploded perspective view of the third cavity assembly of Figure 3.
  • Figure 10 is a perspective view of the porous tube of Figure 9.
  • the present invention discloses an engine exhaust aftertreatment device 100 including a first aftertreatment assembly 1 and a first cavity assembly 2 in communication with the first aftertreatment assembly 1. a second aftertreatment component 3 disposed side by side with the first aftertreatment component 1 , a second cavity component 4 in communication with the second aftertreatment component 3 , and a communication with the first and second cavity components 2, 4 of the third cavity assembly 5.
  • the first aftertreatment component 1 and the second aftertreatment component 3 are connected in series by the first, second, and third cavity components 2, 4, and 5.
  • the first post-processing assembly 1 includes a first housing 11 and an oxidation type catalytic converter (DOC) installed in the first housing 11. 12) A particle trap (DPF) 13 installed in the first casing 11 and an exhaust gas inlet 14 located upstream of the oxidation type catalytic converter 12. Therein, the oxidation type catalytic converter 12 is located upstream of the particle trap 13 to provide a suitable temperature when the particle trap 13 is regenerated.
  • DOC oxidation type catalytic converter
  • DPF particle trap
  • the second post-processing assembly 3 includes a second housing 31 , a selective catalytic reducing agent 32 installed in the second housing 31 , And an exhaust outlet 33 located downstream of the selective catalytic reduction agent 32.
  • the first cavity assembly 2 and the second cavity assembly 4 are substantially identical in shape.
  • the first cavity assembly 2 is for directing exhaust gas from the first aftertreatment assembly 1 to the third cavity assembly 5.
  • the first cavity assembly 2 is provided with a mounting portion 21 for mounting a urea nozzle at a position facing the third cavity assembly 5.
  • the third cavity assembly 5 includes a mixing tube 51 in communication with the first cavity assembly 2.
  • the mixing tube 51 includes an 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 communicating with the inner cavity 52.
  • a plurality of slots 54 and a perforated tube 55 located in the mixing tube 51.
  • the mixing tube 51 includes a tapered portion 511, and the fin 53 and the slit 54 are both disposed on the tapered portion 511.
  • the tapered portion 511 is separately formed from the mixing tube 51 and then fixed together, so as to be easily manufactured.
  • the porous tube 55 includes a first end 551 and a second end 552 opposite the first end 551, wherein the second end 552 is open. Referring to FIG. 8, the porous tube 55 at least partially overlaps the tapered portion 511 along its axial direction.
  • the first end 551 of the porous tube 55 and the tapered portion 511 are both fixed inside the first cavity assembly 2.
  • the urea nozzle is used to inject urea droplets into the porous tube 55.
  • the porous tube 55 has a cylindrical shape, and the second end 552 is provided with a plurality of outwardly expanding claws 553.
  • the plurality of claws 553 are welded and fixed on the inner wall of the mixing tube 51, and the adjacent two A slot 554 is formed between the claws 553 for airflow therethrough.
  • the present invention enhances the crushing of urea and the heat exchange effect with the wall surface of the mixing tube 51 by providing the porous tube 55, thereby reducing the risk of urea crystallization.
  • the second cavity assembly 4 includes a housing 41 having an inner cavity 411, a baffle 42 located within the inner cavity 411, and a distribution plate 43 located downstream of the baffle 42.
  • the baffle 42 partitions the inner cavity 411 into a connecting cavity 421 located inside the baffle 42 and communicating with the third cavity component 5 and the second post-processing component 3, and A cavity 422 is located outside the baffle 42.
  • the present invention improves the flow rate and distribution of the airflow by reducing the effective space of the second cavity assembly 4.
  • the baffle 42 includes a shroud 423 at an end of the third cavity assembly 5 and a plate portion 424 extending from the shroud 423. Referring to FIG.
  • 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.

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  • 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)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

一种发动机排气后处理装置，其包括第一后处理组件（1）、第一腔体组件（2）、第二后处理组件（3）、第二腔体组件（4）以及第三腔体组件（5）；第二腔体组件（4）包括具有内腔体（52）的壳体（41）、位于内腔体（52）内的导流板（42）以及位于导流板（42）下游的分配板（43），其中，导流板（42）包括导流罩（423）以及自导流罩（423）延伸的板片部（424）。在第三腔体组件（5）的出口处，导流罩（423）将从第三腔体组件（5）流出的气流完全与壳体（41）隔开；第三腔体组件（5）还包括位于混合管（51）中的多孔管（55）。通过设置导流板能够使排气比较均匀的进入第二后处理组件的载体，另外，通过设置多孔管，增强了尿素液滴的破碎及其与壁面间的换热效果，从而降低了尿素结晶的风险。

Description

发动机排气后处理装置
本申请要求了申请日为2018年1月19日、申请号为201810055399.1、发明名称为“发动机排气后处理装置”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
本发明涉及一种发动机排气后处理装置。
背景技术
发动机排气后处理装置(例如柴油机排气后处理装置)主要是用来处理或进化排气中有毒及有害物质的装置。排气中的毒害物质主要包含碳氢化合物、一氧化碳、氮氧化物及颗粒物等。
现有技术中已经有采用柴油氧化催化剂(DOC)、柴油颗粒捕集器(DPF)以及选择性催化还原剂(SCR)相组合的方案来提高尾气处理的效能。在一种方案中，所述氧化型催化转换器与颗粒捕集器被串联设置在第一壳体内，并另外设置与该第一壳体连通的第一腔体；所述选择性催化还原剂被设置在第二壳体内，并另外设置与该第二壳体连通的第二腔体；然后借助连接管道将所述第一、第二腔体串联起来。排气与尿素液滴在连接管道中被混合，混合物随后进入第二腔体，再通过选择性催化还原剂，以降低有害物质。然而，排气与尿素液滴的混合物在进入第二腔体后，分布不均匀，进而不能使混合物均匀的通过所述选择性催化还原剂，这降低了处理效率。
发明内容
本发明的目的在于提供一种能够使排气与尿素溶液实现较均匀混合的发动机排气后处理装置。
为实现上述目的，本发明采用如下技术方案：一种发动机排气后处理装置，其包括第一后处理组件、与所述第一后处理组件连通的第一腔体组件、与所述第一后处理组件并排布置的第二后处理组件、与所述第二后处理组件连通的第二腔体组件、以及连通所述第一、第二腔体组件的第三腔体组件；所述第一后处理组件与所述第二后处理组件通过所述第一、第二、第三腔体组件实现串联；所述第二腔体组件包括具有内腔体的壳体以及位于所述内腔体内的导流板，其中，所述导 流板将所述内腔体分隔形成位于所述导流板的内侧且连通所述第三腔体组件与所述第二后处理组件的连接腔以及位于所述导流板的外侧的空腔，所述导流板包括位于所述第三腔体组件的端部的导流罩以及自所述导流罩延伸的板片部；所述第三腔体组件包括与所述第一腔体组件连通的混合管，所述混合管包括内腔体、围绕在所述内腔体的外围且沿周向分布的若干翅片以及对应于所述若干翅片且与所述内腔体连通的若干开槽；在所述第三腔体组件的出口处，所述导流罩将从所述第三腔体组件流出的气流完全与所述壳体隔开；所述第三腔体组件还包括位于所述混合管中的多孔管。
作为本发明进一步改进的技术方案，所述第二腔体组件包括位于所述导流板下游的分配板，所述分配板设有供排气与尿素液滴的混合物通过的若干通孔。
作为本发明进一步改进的技术方案，所述混合管包括锥形部，所述翅片与所述开槽均设置在所述锥形部上。
作为本发明进一步改进的技术方案，所述锥形部与所述混合管分开制作然后固定在一起。
作为本发明进一步改进的技术方案，发动机排气后处理装置包括安装在所述第一腔体组件上且用以安装尿素喷嘴的安装部，所述尿素喷嘴用以向所述多孔管中喷射尿素液滴。
作为本发明进一步改进的技术方案，所述多孔管包括第一端以及与所述第一端相对的第二端，其中所述第二端是开放的。
作为本发明进一步改进的技术方案，所述多孔管沿其轴向至少部分与所述锥形部重叠。
作为本发明进一步改进的技术方案，所述多孔管的第一端与所述锥形部均固定在所述第一腔体组件的内侧。
作为本发明进一步改进的技术方案，所述多孔管呈圆筒状，所述第二端设有若干向外扩张的若干爪部，所述若干爪部焊接固定在所述混合管的内壁上，相邻的两个爪部之间形成供气流穿过的开槽。
作为本发明进一步改进的技术方案，所述第一后处理组件包括柴油氧化催化剂及/或柴油颗粒捕集器，所述第二后处理组件包括选择性催化还原剂。
相较于现有技术，本发明通过设置导流板，能够使排气比较均匀的进入第二后处理组件的载体；另外，通过设置多孔管，增强了尿素液滴的破碎及其与壁面间的换热效果，从而降低了尿素结晶的风险。
附图说明
图1是本发明发动机排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2的部分立体分解图。
图5是图1的右视图。
图6是图1的主视图。
图7是沿图6中A-A线的剖面示意图。
图8是沿图6中B-B线的剖面示意图。
图9是图3中第三腔体组件的立体分解图。
图10是图9中的多孔管的立体示意图。
具体实施方式
请参图1至图10所示，本发明揭示了一种发动机排气后处理装置100，其包括第一后处理组件1、与所述第一后处理组件1连通的第一腔体组件2、与所述第一后处理组件1并排布置的第二后处理组件3、与所述第二后处理组件3连通的第二腔体组件4、以及连通所述第一、第二腔体组件2、4的第三腔体组件5。所述第一后处理组件1与所述第二后处理组件3通过所述第一、第二、第三腔体组件2、4、5实现串联。
请参图7所示，在本发明图示的实施方式中，所述第一后处理组件1包括第一壳体11、安装于所述第一壳体11内的氧化型催化转换器(DOC)12、安装于所述第一壳体11内的颗粒捕集器(DPF)13、以及位于所述氧化型催化转换器12上游的排气进口14。其中，所述氧化型催化转换器12位于所述颗粒捕集器13的上游，以在所述颗粒捕集器13再生时提供合适的温度。
请参图8所示，在本发明图示的实施方式中，所述第二后处理组件3包括第二壳体31、安装于所述第二壳体31内的选择性催化还原剂32、以及位于所述选择性催化还原剂32下游的排气出口33。
在本发明图示的实施方式中，所述第一腔体组件2与所述第二腔体组件4的形状大致相同。所述第一腔体组件2用以将来自所述第一后处理组件1的排气导向所述第三腔体组件5。所述第一腔体组件2在正对所述第三腔体组件5的位置设有用以安装尿素喷嘴的安装部21。
在本发明图示的实施方式中，所述第三腔体组件5包括与所述第一腔体组件2连通的混合管51。所述混合管51包括内腔体52、围绕在所述内腔体52的外围且沿周向分布的若干翅片53、对应于所述若干翅片53且与所述内腔体52连通的若干开槽54以及位于所述混合管51中的多孔管55。
请参图9及图10所示，所述混合管51包括锥形部511，所述翅片53与所述开槽54均设置在所述锥形部511上。所述锥形部511与所述混合管51分开制作然后固定在一起，如此设置，便于制造。
所述多孔管55包括第一端551以及与所述第一端551相对的第二端552，其中所述第二端552是开放的。请参图8所示，所述多孔管55沿其轴向至少部分与所述锥形部511重叠。所述多孔管55的第一端551与所述锥形部511均固定在所述第一腔体组件2的内侧。所述尿素喷嘴用以向所述多孔管55中喷射尿素液滴。所述多孔管55呈圆筒状，所述第二端552设有若干向外扩张的若干爪部553，所述若干爪部553焊接固定在所述混合管51的内壁上，相邻的两个爪部553之间形成供气流穿过的开槽554。本发明通过设置多孔管55，增强了尿素的破碎及其与混合管51壁面间的换热效果，从而降低了尿素结晶的风险。
所述第二腔体组件4包括具有内腔体411的壳体41、位于所述内腔体411内的导流板42以及位于所述导流板42下游的分配板43。其中，所述导流板42将所述内腔体411分隔形成位于所述导流板42的内侧且连通所述第三腔体组件5与所述第二后处理组件3的连接腔421以及位于所述导流板42的外侧的空腔422。本发明通过缩小第二腔体组件4的有效空间，从而对气流的流速与分布起到改善作用。所述导流板42包括位于所述第三腔体组件5的端部的导流罩423以及自所述导流罩423延伸的板片部424。请参图8所示，在所述第三腔体组件5的出口处，所述导流罩423将从所述第三腔体组件5流出的气流完全与所述壳体41隔开，以对气流形成较好的分配效果。所述分配板43设有若干通孔431以利于排气与尿素液滴的混合物通过。
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. 一种发动机排气后处理装置，其包括第一后处理组件、与所述第一后处理组件连通的第一腔体组件、与所述第一后处理组件并排布置的第二后处理组件、与所述第二后处理组件连通的第二腔体组件、以及连通所述第一、第二腔体组件的第三腔体组件；所述第一后处理组件与所述第二后处理组件通过所述第一、第二、第三腔体组件实现串联；所述第二腔体组件包括具有内腔体的壳体以及位于所述内腔体内的导流板，其中，所述导流板将所述内腔体分隔形成位于所述导流板的内侧且连通所述第三腔体组件与所述第二后处理组件的连接腔以及位于所述导流板的外侧的空腔，所述导流板包括位于所述第三腔体组件的端部的导流罩以及自所述导流罩延伸的板片部；所述第三腔体组件包括与所述第一腔体组件连通的混合管，所述混合管包括内腔体、围绕在所述内腔体的外围且沿周向分布的若干翅片以及对应于所述若干翅片且与所述内腔体连通的若干开槽；其特征在于：在所述第三腔体组件的出口处，所述导流罩将从所述第三腔体组件流出的气流完全与所述壳体隔开；所述第三腔体组件还包括位于所述混合管中的多孔管。
  2. 如权利要求1所述的发动机排气后处理装置，其特征在于：所述第二腔体组件包括位于所述导流板下游的分配板，所述分配板设有供排气与尿素液滴的混合物通过的若干通孔。
  3. 如权利要求1所述的发动机排气后处理装置，其特征在于：所述混合管包括锥形部，所述翅片与所述开槽均设置在所述锥形部上。
  4. 如权利要求3所述的发动机排气后处理装置，其特征在于：所述锥形部与所述混合管分开制作然后固定在一起。
  5. 如权利要求3所述的发动机排气后处理装置，其特征在于：发动机排气后处理装置包括安装在所述第一腔体组件上且用以安装尿素喷嘴的安装部，所述尿素喷嘴用以向所述多孔管中喷射尿素液滴。
  6. 如权利要求5所述的发动机排气后处理装置，其特征在于：所述多孔管包括第一端以及与所述第一端相对的第二端，其中所述第二端是开放的。
  7. 如权利要求6所述的发动机排气后处理装置，其特征在于：所述多孔管沿其轴向至少部分 与所述锥形部重叠。
  8. 如权利要求7所述的发动机排气后处理装置，其特征在于：所述多孔管的第一端与所述锥形部均固定在所述第一腔体组件的内侧。
  9. 如权利要求8所述的发动机排气后处理装置，其特征在于：所述多孔管呈圆筒状，所述第二端设有若干向外扩张的若干爪部，所述若干爪部焊接固定在所述混合管的内壁上，相邻的两个爪部之间形成供气流穿过的开槽。
  10. 如权利要求1所述的发动机排气后处理装置，其特征在于：所述第一后处理组件包括柴油氧化催化剂及/或柴油颗粒捕集器，所述第二后处理组件包括选择性催化还原剂。
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