WO2021189795A1 - 柴油机尾气后处理装置 - Google Patents

柴油机尾气后处理装置 Download PDF

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WO2021189795A1
WO2021189795A1 PCT/CN2020/118229 CN2020118229W WO2021189795A1 WO 2021189795 A1 WO2021189795 A1 WO 2021189795A1 CN 2020118229 W CN2020118229 W CN 2020118229W WO 2021189795 A1 WO2021189795 A1 WO 2021189795A1
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WIPO (PCT)
Prior art keywords
cylinder
diesel engine
mixing
catalyst carrier
housing
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PCT/CN2020/118229
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English (en)
French (fr)
Inventor
吴光海
吴涛涛
许俊
张建
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天纳克（苏州）排放***有限公司
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Publication of WO2021189795A1 publication Critical patent/WO2021189795A1/zh

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    • 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
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/185—Mechanical joints the connection being realised by deforming housing, tube, baffle, plate, or parts thereof
    • 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
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • 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

Definitions

  • the invention relates to a diesel engine tail gas after-treatment device, belonging to the technical field of diesel engine tail gas after-treatment.
  • a diesel engine exhaust aftertreatment device usually includes a casing, a diesel catalytic oxidizer (DOC), a diesel particulate filter (DPF), and a selective catalytic reduction agent (SCR) enclosed in the casing.
  • DOC diesel catalytic oxidizer
  • DPF diesel particulate filter
  • SCR selective catalytic reduction agent
  • it usually also includes a mixing device located downstream of the diesel particulate filter (DPF) and upstream of the selective catalytic reduction agent (SCR).
  • the purpose of the present invention is to provide a diesel engine tail gas aftertreatment device with strong mixing ability and better layout flexibility.
  • a diesel engine exhaust after-treatment device which includes a first after-treatment component, a second after-treatment component connected downstream of the first after-treatment component, and a second after-treatment component connected to the second A mixing component downstream of the post-processing component, a third post-processing component located downstream of the mixing component, and a connecting pipe component connecting the mixing component and the third post-processing component
  • the first post-processing component includes A first housing, a first catalyst carrier packaged in the first housing, and an intake cavity located upstream of the first catalyst carrier
  • the second aftertreatment assembly includes a second housing and a first catalyst carrier packaged in the The second catalyst carrier in the second housing
  • the third aftertreatment assembly includes a third housing, a third catalyst carrier packaged in the third housing, and located upstream of the third catalyst carrier
  • the mixing assembly includes a fourth shell, a mixing tube located in the fourth shell and a steel wool mixer installed in the mixing tube, the mixing tube is provided with a number of tail
  • the second post-processing component is detachably connected between the first post-processing component and the mixing component.
  • the diesel engine exhaust gas aftertreatment device is provided with an intake pipe at least partially inserted into the intake cavity, the intake pipe is provided with a cylindrical pipe wall, and the pipe wall faces away from A number of air inlet holes are provided on one side of the first catalyst carrier.
  • the first housing includes a cylindrical first cylinder and a first end cover fixed at one end of the first cylinder, wherein the air inlet pipe passes through the The wall of the first cylinder is inserted into the intake cavity, the axis of the intake pipe is perpendicular to the axis of the first cylinder, and the intake pipe is located between the first end cover and the first end cover. Between the catalyst supports.
  • the fourth housing includes a cylindrical fourth cylinder and a second end cover fixed at one end of the fourth cylinder, and the axis of the mixing tube is perpendicular to the The axis of the fourth cylinder.
  • the second housing includes a cylindrical second cylinder, and the first cylinder, the second cylinder, and the fourth cylinder are arranged in alignment.
  • the fourth housing includes a nozzle mounting seat mounted on the fourth cylinder, the nozzle mounting seat is used to install a urea nozzle, and the urea nozzle is used to Atomized urea droplets are sprayed into the mixing tube, and the fin is located between the nozzle mounting seat and the steel wool mixer in the axial direction of the mixing tube.
  • the connecting pipe assembly is provided with a flexible pipe close to the third housing.
  • the third housing includes a cylindrical third cylinder, a mounting bracket connected to the bottom of the third cylinder, and a third cylinder connected to the top of the third cylinder.
  • An end cone and a tail gas outlet communicating with the end cone, and the third cylinder is perpendicular to the first cylinder, the second cylinder and the fourth cylinder.
  • the first catalyst carrier is a diesel catalytic oxidizer (DOC)
  • the second catalyst carrier is a diesel particulate filter (DPF)
  • the third catalyst carrier is a selective catalytic reduction Agent (SCR).
  • the present invention improves the crushing of urea and improves the mixing effect by arranging a steel wool mixer in the mixing pipe; in addition, the connecting pipe assembly is arranged to connect the mixing assembly and the third post-processing assembly.
  • the installation position of the post-processing components can be adjusted according to different needs, which improves the flexibility of installation.
  • Fig. 1 is a three-dimensional schematic diagram of a diesel engine exhaust gas aftertreatment device of the present invention.
  • Fig. 2 is a schematic cross-sectional view of the first post-processing component, the second post-processing component, and the mixing component along the line A-A in Fig. 1.
  • Fig. 3 is a perspective exploded view of the mixing assembly.
  • the present invention discloses a diesel engine exhaust after-treatment device 100, which includes a first after-treatment component 1, a second after-treatment component connected downstream of the first after-treatment component 1 2.
  • the mixing assembly 4 connected downstream of the second post-processing assembly 2, the third post-processing assembly 3 located downstream of the mixing assembly 4, and the connection connecting the mixing assembly 4 and the third post-processing assembly 3 Tube assembly 5.
  • the first aftertreatment assembly 1 includes a first housing 11, a first catalyst carrier 12 encapsulated in the first housing 11, and an air intake cavity 13 located upstream of the first catalyst carrier 12.
  • the first housing 11 includes a cylindrical first cylinder 111 and a first end cover 112 fixed to one end of the first cylinder 111.
  • the first catalyst carrier 12 is encapsulated in the first cylinder 111.
  • the first catalyst carrier 12 is a diesel catalytic oxidizer (DOC).
  • DOC diesel catalytic oxidizer
  • the diesel engine exhaust gas aftertreatment device 100 is provided with an intake pipe 14 at least partially inserted into the intake cavity 13, and the intake pipe 14 is provided with a cylindrical pipe wall 141, and the pipe wall 141 faces away from the first A plurality of air inlet holes 142 are provided on one side of the catalyst carrier 12. With this arrangement, when the exhaust gas of the diesel engine enters the intake pipe 14, the exhaust gas flows out from the intake hole 142, and then reaches the surface of the first catalyst carrier 12 after passing through a longer flow path, which improves the uniformity of airflow distribution.
  • the intake pipe 14 passes through the wall 1111 of the first cylinder 111 to be inserted into the intake cavity 13, and the axis 140 of the intake pipe 14 is perpendicular to the axis 1110 of the first cylinder 111, The intake pipe 14 is located between the first end cover 112 and the first catalyst carrier 12.
  • the second post-processing component 2 is detachably connected between the first post-processing component 1 and the mixing component 4.
  • the second post-processing component 2 is detachably connected between the first post-processing component 1 and the mixing component 4 by a clamp 20.
  • the second post-processing assembly 2 includes a second housing 21 and a second catalyst carrier 22 encapsulated in the second housing 21.
  • the second housing 21 includes a second cylindrical body 211 having a cylindrical shape.
  • the second catalyst carrier 22 is a diesel particulate filter (DPF).
  • the third post-treatment assembly 3 includes a third housing 31, a third catalyst carrier 32 encapsulated in the third housing 31, and a connecting cavity 33 located upstream of the third catalyst carrier 32.
  • the third housing 31 includes a cylindrical third cylinder 311, a mounting bracket 312 connected to the bottom of the third cylinder 311, an end cone 313 connected to the top of the third cylinder 311, and A tail gas outlet 314 communicating with the end cone 313.
  • the mounting bracket 312 is provided with a mounting flange 3121 and a plurality of mounting holes 3122 provided on the mounting flange 3121.
  • the third aftertreatment assembly 3 can be installed on the vehicle by providing the mounting bracket 312.
  • the third catalyst carrier 32 is a selective catalytic reduction agent (SCR).
  • the mixing assembly 4 includes a fourth housing 41, a mixing pipe 42 located in the fourth housing 41, and a steel wool mixer 43 installed in the mixing pipe 42.
  • the mixing tube 42 is provided with a plurality of fins 421 for the exhaust gas to flow in to form a swirling flow;
  • the fourth housing 41 includes a cylindrical fourth cylinder 411 and a fourth cylinder 411 fixed at one end of the fourth cylinder 411 In the second end cover 412, the axis 420 of the mixing tube 42 is perpendicular to the axis 4110 of the fourth cylinder 411.
  • the fourth housing 41 further includes a nozzle mounting seat 413 installed on the fourth cylinder 411, the nozzle mounting seat 413 is used to install a urea nozzle 414, and the urea nozzle 414 is used to The atomized urea droplets are sprayed into the mixing pipe 42.
  • the fin 421 is located between the nozzle mounting seat 413 and the steel wool mixer 43 in the axial direction of the mixing tube 42.
  • the first cylinder 111, the second cylinder 211, and the fourth cylinder 411 are aligned and arranged in a horizontal direction.
  • the third cylinder 311 is arranged in a vertical direction and perpendicular to the first cylinder 111, the second cylinder 211 and the fourth cylinder 411.
  • the connecting tube assembly 5 is used to communicate with the mixing tube 42 and the connecting cavity 33.
  • the connecting tube assembly 5 is provided with a flexible tube 51 close to the third housing 311 to absorb vibration.

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  • 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

一种柴油机尾气后处理装置（100），其包括第一后处理组件（1）、第二后处理组件（2）、混合组件（4）、第三后处理组件（3）以及连接混合组件（4）与第三后处理组件（3）的连接管组件（5），其中混合组件（4）包括混合管（42）以及安装在混合管（42）中的钢丝绒混合器（43），混合管（42）设有若干供尾气流入以形成旋流的翅片（421）。

Description

柴油机尾气后处理装置
本申请要求了申请日为2020年03月24日、申请号为202010213836.5、发明名称为“柴油机尾气后处理装置”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
本发明涉及一种柴油机尾气后处理装置，属于柴油发动机尾气后处理技术领域。
背景技术
柴油机尾气后处理装置通常包括壳体以及封装在壳体中的柴油催化氧化剂(DOC)、柴油颗粒捕集器(DPF)以及选择性催化还原剂(SCR)。为了提高柴油机尾气后处理装置的性能，其通常还包括位于柴油颗粒捕集器(DPF)的下游、选择性催化还原剂(SCR)的上游的混合装置。随着排放法规的不断升级，如何更好的优化混合装置以及提高柴油机尾气后处理装置布置的灵活性是需要解决的技术问题。
发明内容
本发明的目的在于提供一种混合能力较强且布置灵活性较好的柴油机尾气后处理装置。
为实现上述目的，本发明采用如下技术方案：一种柴油机尾气后处理装置，其包括第一后处理组件、连接在所述第一后处理组件的下游的第二后处理组件、连接在第二后处理组件的下游的混合组件、位于所述混合组件的下游的第三后处理组件以及连接所述混合组件与所述第三后处理组件的连接管组件，其中所述第一后处理组件包括第一壳体、封装在所述第一壳体中的第一催化剂载体以及位于所述第一催化剂载体的上游的进气腔体；所述第二后处理组件包括第二 壳体以及封装在所述第二壳体中的第二催化剂载体；所述第三后处理组件包括第三壳体、封装在所述第三壳体中的第三催化剂载体以及位于所述第三催化剂载体的上游的连接腔体；所述混合组件包括第四壳体、位于所述第四壳体内的混合管以及安装在所述混合管中的钢丝绒混合器，所述混合管设有若干供尾气流入以形成旋流的翅片；所述连接管组件用以连通所述混合管以及所述连接腔体。
作为本发明进一步改进的技术方案，所述第二后处理组件可拆卸地连接在所述第一后处理组件与所述混合组件之间。
作为本发明进一步改进的技术方案，所述柴油机尾气后处理装置设有至少部分***所述进气腔体的进气管，所述进气管设有圆筒状的管壁，所述管壁背向所述第一催化剂载体的一侧设有若干进气孔。
作为本发明进一步改进的技术方案，所述第一壳体包括圆筒状的第一筒体以及固定在所述第一筒体的一端的第一端盖，其中所述进气管穿过所述第一筒体的壁部以***所述进气腔体中，所述进气管的轴线垂直于所述第一筒体的轴线，所述进气管位于所述第一端盖与所述第一催化剂载体之间。
作为本发明进一步改进的技术方案，所述第四壳体包括圆筒状的第四筒体以及固定在所述第四筒体的一端的第二端盖，所述混合管的轴线垂直于所述第四筒体的轴线。
作为本发明进一步改进的技术方案，所述第二壳体包括圆筒状的第二筒体，所述第一筒体、所述第二筒体以及所述第四筒体对齐布置。
作为本发明进一步改进的技术方案，所述第四壳体包括安装在所述第四筒体上的喷嘴安装座，所述喷嘴安装座用以安装尿素喷嘴，所述尿素喷嘴用以向所述混合管中喷射雾化的尿素液滴，所述翅片在所述混合管的轴线方向上位于所述喷嘴安装座与所述钢丝绒混合器之间。
作为本发明进一步改进的技术方案，所述连接管组件设有靠近所述第三壳体的挠性管。
作为本发明进一步改进的技术方案，所述第三壳体包括圆筒状的第三筒体、 连接在所述第三筒体的底部的安装支架、连接在所述第三筒体的顶部的端锥以及与所述端锥连通的尾气出口，所述第三筒体垂直于所述第一筒体、所述第二筒体以及所述第四筒体。
作为本发明进一步改进的技术方案，所述第一催化剂载体为柴油催化氧化剂(DOC)，所述第二催化剂载体为柴油颗粒捕集器(DPF)，所述第三催化剂载体为选择性催化还原剂(SCR)。
相较于现有技术，本发明通过在混合管中设置钢丝绒混合器，改善了尿素破碎，提高了混合效果；另外，通过设置连接管组件来连接混合组件与第三后处理组件，第三后处理组件可以根据不同的需要调整安装位置，提高了安装的灵活性。
附图说明
图1是本发明柴油机尾气后处理装置的立体示意图。
图2是第一后处理组件、第二后处理组件以及混合组件沿图1中A-A线的剖面示意图。
图3是混合组件的立体分解图。
具体实施方式
请参照图1至图3所示，本发明揭示了一种柴油机尾气后处理装置100，其包括第一后处理组件1、连接在所述第一后处理组件1的下游的第二后处理组件2、连接在第二后处理组件2的下游的混合组件4、位于所述混合组件4的下游的第三后处理组件3以及连接所述混合组件4与所述第三后处理组件3的连接管组件5。
所述第一后处理组件1包括第一壳体11、封装在所述第一壳体11中的第一催化剂载体12以及位于所述第一催化剂载体12的上游的进气腔体13。所述第一壳体11包括圆筒状的第一筒体111以及固定在所述第一筒体111的一端的第一端盖112。所述第一催化剂载体12被封装在所述第一筒体111中。在本发明的一种实施方式中，所述第一催化剂载体12为柴油催化氧化剂(DOC)。
所述柴油机尾气后处理装置100设有至少部分***所述进气腔体13的进气管14，所述进气管14设有圆筒状的管壁141，所述管壁141背向所述第一催化剂载体12的一侧设有若干进气孔142。如此设置，当柴油机的尾气进入到进气管14后，这些尾气自所述进气孔142流出，经过较长的流动路径后再到达第一催化剂载体12的表面，提高了气流分配的均匀性。所述进气管14穿过所述第一筒体111的壁部1111以***所述进气腔体13中，所述进气管14的轴线140垂直于所述第一筒体111的轴线1110，所述进气管14位于所述第一端盖112与所述第一催化剂载体12之间。
所述第二后处理组件2可拆卸地连接在所述第一后处理组件1与所述混合组件4之间。在本发明图示的实施方式中，所述第二后处理组件2通过卡箍20可拆卸地连接在所述第一后处理组件1与所述混合组件4之间。所述第二后处理组件2包括第二壳体21以及封装在所述第二壳体21中的第二催化剂载体22。在本发明图示的实施方式中，第二壳体21包括圆筒状的第二筒体211。在本发明的一种实施方式中，所述第二催化剂载体22为柴油颗粒捕集器(DPF)。
所述第三后处理组件3包括第三壳体31、封装在所述第三壳体31中的第三催化剂载体32以及位于所述第三催化剂载体32的上游的连接腔体33。所述第三壳体31包括圆筒状的第三筒体311、连接在所述第三筒体311的底部的安装支架312、连接在所述第三筒体311的顶部的端锥313以及与所述端锥313连通的尾气出口314。所述安装支架312设有安装法兰3121以及设置在安装法兰3121上的若干安装孔3122。通过设置所述安装支架312能够将所述第三后处理组件3安装到车辆上。在本发明的一种实施方式中，所述第三催化剂载体32为选择性催化还原剂(SCR)。
所述混合组件4包括第四壳体41、位于所述第四壳体41内的混合管42以及安装在所述混合管42中的钢丝绒混合器43。所述混合管42设有若干供尾气流入以形成旋流的翅片421；所述第四壳体41包括圆筒状的第四筒体411以及固定在所述第四筒体411的一端的第二端盖412，所述混合管42的轴线420垂直于所述第四筒体411的轴线4110。此外，所述第四壳体41还包括安装在所 述第四筒体411上的喷嘴安装座413，所述喷嘴安装座413用以安装尿素喷嘴414，所述尿素喷嘴414用以向所述混合管42中喷射雾化的尿素液滴。所述翅片421在所述混合管42的轴线方向上位于所述喷嘴安装座413与所述钢丝绒混合器43之间。通过在混合管42中设置钢丝绒混合器43，改善了尿素破碎，提高了混合效果。
在本发明图示的实施方式中，所述第一筒体111、所述第二筒体211以及所述第四筒体411沿水平方向对齐布置。所述第三筒体311沿竖直方向布置且垂直于所述第一筒体111、所述第二筒体211以及所述第四筒体411。
所述连接管组件5用以连通所述混合管42以及所述连接腔体33。所述连接管组件5设有靠近所述第三壳体311的挠性管51，以吸收振动。通过设计不同形式的连接管组件5能够实现第三后处理组件3与其他后处理组件之间不同角度、不同距离的安装，提高了安装的灵活性。
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. 一种柴油机尾气后处理装置，其特征在于，包括第一后处理组件、连接在所述第一后处理组件的下游的第二后处理组件、连接在第二后处理组件的下游的混合组件、位于所述混合组件的下游的第三后处理组件以及连接所述混合组件与所述第三后处理组件的连接管组件，其中所述第一后处理组件包括第一壳体、封装在所述第一壳体中的第一催化剂载体以及位于所述第一催化剂载体的上游的进气腔体；所述第二后处理组件包括第二壳体以及封装在所述第二壳体中的第二催化剂载体；所述第三后处理组件包括第三壳体、封装在所述第三壳体中的第三催化剂载体以及位于所述第三催化剂载体的上游的连接腔体；所述混合组件包括第四壳体、位于所述第四壳体内的混合管以及安装在所述混合管中的钢丝绒混合器，所述混合管设有若干供尾气流入以形成旋流的翅片；所述连接管组件用以连通所述混合管以及所述连接腔体。
  2. 如权利要求1所述的柴油机尾气后处理装置，其特征在于：所述第二后处理组件可拆卸地连接在所述第一后处理组件与所述混合组件之间。
  3. 如权利要求1所述的柴油机尾气后处理装置，其特征在于：所述柴油机尾气后处理装置设有至少部分***所述进气腔体的进气管，所述进气管设有圆筒状的管壁，所述管壁背向所述第一催化剂载体的一侧设有若干进气孔。
  4. 如权利要求3所述的柴油机尾气后处理装置，其特征在于：所述第一壳体包括圆筒状的第一筒体以及固定在所述第一筒体的一端的第一端盖，其中所述进气管穿过所述第一筒体的壁部以***所述进气腔体中，所述进气管的轴线垂直于所述第一筒体的轴线，所述进气管位于所述第一端盖与所述第一催化剂载体之间。
  5. 如权利要求4所述的柴油机尾气后处理装置，其特征在于：所述第四壳体包括圆筒状的第四筒体以及固定在所述第四筒体的一端的第二端盖，所述混合管的轴线垂直于所述第四筒体的轴线。
  6. 如权利要求5所述的柴油机尾气后处理装置，其特征在于：所述第二壳体包括圆筒状的第二筒体，所述第一筒体、所述第二筒体以及所述第四筒体对齐布置。
  7. 如权利要求1所述的柴油机尾气后处理装置，其特征在于：所述第四壳体包括安装在所述第四筒体上的喷嘴安装座，所述喷嘴安装座用以安装尿素喷嘴，所述尿素喷嘴用以向所述混合管中喷射雾化的尿素液滴，所述翅片在所述混合管的轴线方向上位于所述喷嘴安装座与所述钢丝绒混合器之间。
  8. 如权利要求1所述的柴油机尾气后处理装置，其特征在于：所述连接管组件设有靠近所述第三壳体的挠性管。
  9. 如权利要求1所述的柴油机尾气后处理装置，其特征在于：所述第三壳体包括圆筒状的第三筒体、连接在所述第三筒体的底部的安装支架、连接在所述第三筒体的顶部的端锥以及与所述端锥连通的尾气出口，所述第三筒体垂直于所述第一筒体、所述第二筒体以及所述第四筒体。
  10. 如权利要求1所述的柴油机尾气后处理装置，其特征在于：所述第一催化剂载体为柴油催化氧化剂(DOC)，所述第二催化剂载体为柴油颗粒捕集器(DPF)，所述第三催化剂载体为选择性催化还原剂(SCR)。
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