WO2017101628A1 - 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
WO2017101628A1
WO2017101628A1 PCT/CN2016/105815 CN2016105815W WO2017101628A1 WO 2017101628 A1 WO2017101628 A1 WO 2017101628A1 CN 2016105815 W CN2016105815 W CN 2016105815W WO 2017101628 A1 WO2017101628 A1 WO 2017101628A1
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WIPO (PCT)
Prior art keywords
cavity
engine exhaust
aftertreatment device
exhaust aftertreatment
selective catalytic
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PCT/CN2016/105815
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English (en)
French (fr)
Inventor
王伟
童毅君
王聪
毛伟
赵治国
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天纳克（苏州）排放***有限公司
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Publication of WO2017101628A1 publication Critical patent/WO2017101628A1/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

Definitions

  • the present invention relates to an engine exhaust aftertreatment device.
  • Engine exhaust aftertreatment devices are primarily devices used to treat or purify toxic and hazardous materials in the exhaust.
  • the poisonous substances in the exhaust gas mainly include hydrocarbons, carbon monoxide, nitrogen oxides, and particulate matter.
  • a combination of an oxidation type catalytic converter (DOC), a particulate trap (DPF), and a selective catalytic reduction agent (SCR) system has been used in the prior art to improve the efficiency of exhaust gas treatment.
  • the oxidizing catalytic converter and the particulate trap are disposed in series within the first housing; the selective catalytic reducing agent is disposed within the second housing; and then the first 1.
  • the second housing is connected in series.
  • a technical solution using a mixing pipe or a static mixer is provided in the prior art.
  • the mixing tube is generally applied under the condition that the engine exhaust aftertreatment device can provide sufficient installation space.
  • the technical scheme of the static mixer is usually adopted.
  • the overall size of the engine exhaust aftertreatment device is limited by the customer's installation size and cannot be infinitely wide, while the hybrid structure on the mixing tube It has a certain length, so how to solve such a problem that the installation of such a mixing tube can be installed in the case where the overall size of the engine exhaust after-treatment device is relatively small has become one of the technical problems to be solved in the industry.
  • an engine exhaust aftertreatment device including an inlet for communicating with exhaust gas of an engine, a first cavity communicating with the inlet, and the first a mixing tube in communication with the chamber, a downstream aftertreatment assembly located downstream of the mixing tube and in communication with the mixing tube, and an outlet in communication with the downstream aftertreatment assembly;
  • the mixing tube including a hollow interior cavity, a plurality of fins surrounding the periphery of the inner cavity and distributed circumferentially, and a plurality of slots corresponding to the plurality of fins and communicating with the inner cavity;
  • the engine exhaust aftertreatment device including a casing
  • the housing includes a first end plate and a first inner side plate cooperating with the first end plate, wherein the first inner side plate is fixed to the first end plate to form a space therebetween a first cavity;
  • the housing includes an expansion cavity in communication with the first cavity, the expansion cavity and the first cavity being respectively located on opposite sides of the first end plate, wherein the wing a sheet and the slot through the first
  • the first inner side plate is provided with a first opening
  • the housing comprises a sleeve portion fixed on the first opening, and the sleeve portion is provided with the expansion cavity And an end wall at the root of the expansion chamber, the end wall being provided with a through hole for the mixing tube to pass through.
  • the sleeve portion is welded to the inner side of the first opening.
  • the joint of the mixing tube and the through hole is welded and sealed.
  • the housing is provided with a nozzle mounting portion corresponding to the mixing tube;
  • the mixing tube has a cylindrical shape, and the mixing tube includes one side of the fin and is close to a plurality of openings of the nozzle mounting portion.
  • the engine exhaust aftertreatment device includes an upstream aftertreatment component connected between the inlet and the first cavity, the upstream aftertreatment component including an oxidizing catalytic converter And / or particle traps.
  • the downstream aftertreatment component comprises a selective catalytic reducing agent.
  • the first end plate is provided with a second perforation and a third perforation corresponding to the first group of selective catalytic reducing agents and the second group of selective catalytic reducing agents, respectively.
  • the housing includes a second inner side panel that mates with the first end panel, wherein the second inner side panel covers a periphery of the second perforation and the third perforation to form a second cavity, The second cavity is in communication with the outlet.
  • the housing includes a first outer side plate at a periphery of the first inner side panel and the second inner side panel, and the outlet extends through the first outer side panel.
  • the present invention provides a mixing tube, so that the urea solution sprayed from the nozzle is surrounded by the vortex exhaust gas in the inner cavity of the mixing tube, thereby avoiding the urea directly contacting the inner wall, thereby reducing the urea.
  • the vortex exhaust improves the uniformity of mixing with the atomized urea solution, thereby increasing the efficiency of the exhaust treatment.
  • the installation of the mixing tube is not limited to the overall size of the engine exhaust aftertreatment device, and the back pressure of the system can be flexibly adjusted by adjusting the volume of the expansion chamber to achieve a standardized design.
  • 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.
  • Fig. 3 is a partially exploded perspective view of Fig. 2;
  • Figure 4 is a further exploded perspective view of Figure 3.
  • Figure 5 is a further exploded perspective view of Figure 4.
  • Figure 6 is a partial perspective view of Figure 1 with a portion of the housing removed and the nozzle removed.
  • Figure 7 is a partial exploded perspective view of Figure 6 with the sleeve portion separated.
  • Figure 8 is an exploded perspective view of another angle of Figure 7.
  • Figure 9 is a schematic cross-sectional view taken along line A-A of Figure 1, and showing the swirling direction of the exhaust gas as it enters the mixing tube.
  • Figure 10 is a cross-sectional view taken along line B-B of Figure 1.
  • an engine exhaust aftertreatment device 100 including an upstream aftertreatment assembly 2 having a housing 1 located within the housing 1 and the upstream aftertreatment assembly. 2 a downstream aftertreatment component 3 in series, and a mixing tube 4 for connecting the upstream and downstream aftertreatment components 2, 3 in series.
  • the upstream aftertreatment component 2 comprises an oxidation type catalytic converter (DOC) 21 and/or a particle trap (DPF) 22, wherein the oxidation type catalytic converter 21 is located
  • DOC oxidation type catalytic converter
  • DPF particle trap
  • the downstream aftertreatment component 3 includes a selective catalytic reducing agent (SCR).
  • the selective catalytic reducing agent comprises a first set of selective catalytic reducing agents 31 disposed side by side and a second set of selective catalytic reducing agents 32, the first set of selective catalytic reductions
  • the agent 31 is in parallel with the second set of selective catalytic reducing agents 32.
  • the casing 1 includes a cylindrical portion 11, a first outer side plate 12 at one end of the cylindrical portion 11, a second outer side plate 13 at the other end of the cylindrical portion 11, and a second outer side plate 13 connected thereto.
  • An inlet 14 in communication with the exhaust of the engine, and an outlet 15 through the first outer panel 12 are provided.
  • the housing 1 is further provided with a plurality of support plates 16 located inside thereof for supporting the upstream aftertreatment assembly 2 and the downstream aftertreatment assembly 3.
  • the support plate 16 includes a first end plate 5 adjacent the outlet 15.
  • the first end plate 5 includes a first perforation 51 corresponding to the particle trap (DPF) 22, and a second perforation corresponding to the first set of selective catalytic reducing agent 31. 52.
  • a third perforation 53 corresponding to the second set of selective catalytic reducing agents 32, and a first opening 54 through which at least a portion of the mixing tube 4 passes.
  • the housing 1 includes a first inner side plate 61 and a second inner side plate 62 fixed to the first end plate 5, wherein the first inner side plate 61 is welded to the a first end plate 5 is formed between them to form a first cavity 71 therebetween, and the first inner side plate 61 covers the first through hole 51 and the first opening 54; the second inner side plate 62 is welded The first end plate 5 is formed to form a second cavity 72 therebetween, and the second inner side plate 62 covers the second through hole 52 and the third through hole 53.
  • the outlet 15 is in communication with the second cavity 72.
  • the housing 1 is provided with a nozzle mounting portion 17 corresponding to the mixing tube 4 for mounting the urea nozzle 18.
  • the mixing tube 4 has a cylindrical shape, and includes a hollow inner cavity 41 surrounding the outer periphery of the inner cavity 41. a plurality of fins 42 distributed in the circumferential direction, and a plurality of slots 43 corresponding to the plurality of fins 42 and communicating with the inner cavity 41, and one side of the fins 42 and adjacent to the nozzle mounting portion A plurality of openings 44 of 17.
  • the slit 43 is formed by punching the fins 42, and the openings 44 are evenly distributed circumferentially around the periphery of the inner cavity 41.
  • the fins 42 are arranged at an angle such that after the exhaust gas passes through the slot 43, a good eddy current can be formed in the inner cavity 41.
  • the housing 1 includes a sleeve portion 8 that is fixed to the first opening 54.
  • the sleeve portion 8 is provided with an expansion chamber 81 and an end wall 82 at the root of the expansion chamber 81.
  • the end wall 82 is provided with a through hole 821 through which the mixing tube 4 passes.
  • the expansion cavity 81 is in communication with the first cavity 71, and the expansion cavity 81 and the first cavity 71 are respectively located on two sides of the first end plate 5, wherein the fins 42 and the The slot 43 passes through the first cavity 71, and the fin 42 and the slot 43 are housed together in the first cavity 71 and the expansion cavity 81.
  • the sleeve portion 8 is welded inside the first opening 54.
  • the junction of the mixing tube 4 and the through hole 821 is welded and sealed.
  • the exhaust from the engine first enters from the inlet 14 and then passes through the oxidation-type catalytic converter 21 and the particle trap 22 in sequence, and then enters the first cavity from the first perforation 51. 71; under the action of the exhaust pressure, the exhaust gas is guided by the fins 42 through the slot 43 and the opening 44 into the inner cavity 41; when the injection condition is reached, the urea nozzle 18 directly atomizes The urea solution is sprayed into the inner cavity 41; the exhaust gas mixed with the urea droplets is divided into two paths simultaneously into the first group of selective catalytic reducing agent 31 and the second group of selective catalytic reducing agent 32, and then passes through After the second cavities 72 meet, they finally exit from the outlet 15.
  • the nozzle mounting portion 17 is adjacent to the plurality of openings 44. Due to the urea solution ejected from the urea nozzle 18, a dead zone is easily formed at a position away from the spout, which easily causes crystallization. After the solution of the present invention, the urea solution at the position can flow out from the opening 44. Thereby reducing the risk of urea crystallization.
  • the urea solution sprayed from the urea nozzle 18 is surrounded by the vortex exhaust gas in the inner cavity 41 of the mixing tube 4, thereby avoiding direct contact of the urea with the inner wall, reducing the risk of crystallization.
  • the vortex exhaust improves the uniformity of mixing with the atomized urea solution, thereby increasing the efficiency of the exhaust treatment, enabling the solution of the present invention to meet the requirements of more stringent emission regulations.
  • the present invention increases the installation space inside the engine exhaust after-treatment device 100 by providing the sleeve portion 8, and is not limited to the overall size of the engine exhaust after-treatment device 100, and can be flexibly adjusted by adjusting the volume of the expansion chamber 81. Back pressure of the system to achieve standardized design.

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

Abstract

一种发动机排气后处理装置（100），其包括进口（14）、第一腔体（71）、混合管（4）、下游后处理组件（3）以及出口（15）。混合管（4）包括中空的内腔体（41）、若干翅片（42）以及对应于翅片的若干开槽（43）。发动机排气后处理装置包括壳体（1），所述壳体（1）包括第一端板（5）以及第一内侧板（61），其中所述第一内侧板（61）固定在所述第一端板（5）上以在它们之间形成第一腔体（71）。所述壳体（1）包括与所述第一腔体（71）连通的扩展腔（81），所述扩展腔（81）与所述第一腔体（71）分别位于所述第一端板（5）的两侧，所述翅片（42）与所述开槽（43）被共同收容在所述第一腔体（71）与所述扩展腔（81）中。如此设置，涡旋的排气能够提高与雾化的尿素溶液进行混合的均匀性；另外，通过设置扩展腔（81），使得混合管（4）的安装不局限于发动机排气后处理装置的整体尺寸。

Description

发动机排气后处理装置
本申请要求了申请日为2015年12月18日、申请号为201521064810.X、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)主要是用来处理或净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氧化型催化转换器(DOC)、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排气处理的效能。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；所述选择性催化还原剂被设置在第二壳体内；然后借助连接管道将所述第一、第二壳体串联起来。
为了使排气能够在所述连接管道内与雾化后的尿素溶液进行均匀混合，现有技术中提供了利用混合管或者静态混合器的技术方案。其中，混合管通常应用在发动机排气后处理装置能够提供足够安装空间的条件下。而当安装空间不够时，则通常采用静态混合器的技术方案。
然而，因为混合管的成本以及性能相较于静态混合器某些时候具有优势，发动机排气后处理装置的整体尺寸受限于客户的安装尺寸不可能无限的宽，而混合管上的混合结构又具有一定的长度，因此如何解决在发动机排气后处理装置的整体尺寸比较小的情况下也能安装此类混合管便成为业界需要解决的技术问题之一。
发明内容
本发明的目的在于提供一种具有混合管的发动机排气后处理装置，并且该混合管的安装不局限于发动机排气后处理装置的整体尺寸。
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，其包括用以与发动机的排气相连通的进口、与所述进口连通的第一腔体、与所述第一腔体连通的混合管、位于所述混合管的下游且与所述混合管连通的下游后处理组件以及与所述下游后处理组件连通的出口；所述混合管包括中空的内腔体、围绕在所述内腔体的***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；所述发动机排气后处理装置包括壳体，所述壳体包括第一端板以及与所述第一端板相配合的第一内侧板，其中所述第一内侧板固定在所述第一端板上以在它们之间形成所述第一腔体；所述壳体包括与所述第一腔体连通的扩展腔，所述扩展腔与所述第一腔体分别位于所述第一端板的两侧，其中所述翅片与所述开槽穿过所述第一腔体，且所述翅片与所述开槽被共同收容在所述第一腔体与所述 扩展腔中。
作为本发明进一步改进的技术方案，所述第一内侧板设有第一开口，所述壳体包括固定在所述第一开口上的套筒部，所述套筒部设有所述扩展腔以及位于所述扩展腔根部的端壁，所述端壁设有供所述混合管穿过的通孔。
作为本发明进一步改进的技术方案，所述套筒部焊接在所述第一开口的内侧。
作为本发明进一步改进的技术方案，所述混合管与所述通孔的结合处焊接密封。
作为本发明进一步改进的技术方案，所述壳体设有对应于所述混合管的喷嘴安装部；所述混合管呈圆筒状，所述混合管包括位于所述翅片的一侧且靠近所述喷嘴安装部的若干开孔。
作为本发明进一步改进的技术方案，所述发动机排气后处理装置包括连接在所述进口与所述第一腔体之间的上游后处理组件，所述上游后处理组件包括氧化型催化转换器及/或颗粒捕集器。
作为本发明进一步改进的技术方案，所述下游后处理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，所述选择性催化还原剂包括并排设置的第一组选择性催化还原剂以及第二组选择性催化还原剂，所述第一组选择性催化还原剂与所述第二组选择性催化还原剂并联。
作为本发明进一步改进的技术方案，所述第一端板设有分别对应于所述第一组选择性催化还原剂与所述第二组选择性催化还原剂的第二穿孔与第三穿孔，所述壳体包括与所述第一端板相配合的第二内侧板，其中所述第二内侧板覆盖在所述第二穿孔与所述第三穿孔的***以形成第二腔体，所述第二腔体与所述出口连通。
作为本发明进一步改进的技术方案，所述壳体包括位于所述第一内侧板以及第二内侧板***的第一外侧板，所述出口贯穿所述第一外侧板。
相较于现有技术，本发明通过设置混合管，使得从喷嘴喷出来的尿素溶液在所述混合管的内腔体内被涡旋的排气包围，从而避免了尿素直接与内壁接触，降低了结晶的风险。涡旋的排气能够提高与雾化的尿素溶液进行混合的均匀性，从而提高了排气处理的效率。另外，通过设置扩展腔，使得混合管的安装不局限于发动机排气后处理装置的整体尺寸，且可以通过调整扩展腔的体积来灵活调整***的背压，实现标准化设计。
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2的部分立体分解图。
图4是图3的进一步的立体分解图。
图5是图4的进一步的立体分解图。
图6是图1去除部分壳体以及喷嘴之后的部分立体示意图。
图7是图6的部分立体分解图，其中套筒部被分离出来。
图8是图7另一角度的立体分解图。
图9是沿图1中A-A线的剖面示意图，且标明了排气进入混合管时的旋流方向。
图10是沿图1中B-B线的剖面示意图。
具体实施方式
请参图1及图2所示，本发明揭示了一种发动机排气后处理装置100，其包括壳体1位于所述壳体1内的上游后处理组件2、与所述上游后处理组件2串联的下游后处理组件3、以及用以将所述上游、下游后处理组件2、3串联起来的混合管4。
在本发明图示的实施方式中，所述上游后处理组件2包括氧化型催化转换器(DOC)21及/或颗粒捕集器(DPF)22，其中，所述氧化型催化转换器21位于所述颗粒捕集器22的上游，以在所述颗粒捕集器22再生时提供合适的温度。
所述下游后处理组件3包括选择性催化还原剂(SCR)。在本发明图示的实施方式中，所述选择性催化还原剂包括并排设置的第一组选择性催化还原剂31以及第二组选择性催化还原剂32，所述第一组选择性催化还原剂31与所述第二组选择性催化还原剂32并联。
所述壳体1包括筒状部11、位于筒状部11一端的第一外侧板12、位于筒状部11另一端的第二外侧板13、与所述第二外侧板13连接的且用以与发动机的排气相连通的进口14、以及穿过所述第一外侧板12的出口15。请参图10所示，所述壳体1还设有位于其内部且用以支撑所述上游后处理组件2与所述下游后处理组件3的若干支撑板16。其中所述支撑板16包括靠近所述出口15的第一端板5。
请参图7所示，所述第一端板5包括对应于所述颗粒捕集器(DPF)22的第一穿孔51、对应于所述第一组选择性催化还原剂31的第二穿孔52、对应于所述第二组选择性催化还原剂32的第三穿孔53、以及供至少部分所述混合管4穿过的第一开口54。
请参图3至图10所示，所述壳体1包括固定于所述第一端板5的第一内侧板61以及第二内侧板62，其中所述第一内侧板61焊接在所述第一端板5上以在它们之间形成第一腔体71，且所述第一内侧板61覆盖所述第一穿孔51以及所述第一开口54；所述第二内侧板62焊接在所述第一端板5上以在它们之间形成第二腔体72，且所述第二内侧板62覆盖所述第二穿孔52以及所述第三穿孔53。所述出口15与所述第二腔体72连通。
所述壳体1设有对应于所述混合管4的喷嘴安装部17，用以安装尿素喷嘴18。
请参图7及图10所示，在本发明图示的实施方式中，所述混合管4呈圆筒状，其包括中空的内腔体41、围绕在所述内腔体41的***且沿周向分布的若干翅片42、以及对应于所述若干翅片42且与所述内腔体41连通的若干开槽43以及位于所述翅片42的一侧且靠近所述喷嘴安装部17的若干开孔44。在本发明图示的实施方式中，所述开槽43是由冲压所述翅片42后形成的，所述开孔44沿周向均匀分布在所述内腔体41的***。请参图9所示，所述翅片42沿一定的角度排列，从而使排气穿过所述开槽43后，能够在所述内腔体41内形成良好的涡流。
请参图6至图8以及图10所示，所述壳体1包括固定在所述第一开口54上的套筒部8。所述套筒部8设有扩展腔81以及位于所述扩展腔81根部的端壁82。所述端壁82设有供所述混合管4穿过的通孔821。所述扩展腔81与所述第一腔体71连通，所述扩展腔81与所述第一腔体71分别位于所述第一端板5的两侧，其中所述翅片42与所述开槽43穿过所述第一腔体71，且所述翅片42与所述开槽43被共同收容在所述第一腔体71与所述扩展腔81中。
在本发明图示的实施方式中，所述套筒部8焊接在所述第一开口54的内侧。所述混合管4与所述通孔821的结合处焊接密封。
使用时，从发动机出来的排气首先从进口14进入，然后依次经过所述氧化型催化转换器21以及所述颗粒捕集器22，再自所述第一穿孔51进入所述第一腔体71中；在排气压力的作用下，排气会在翅片42的导引下，穿过开槽43以及开孔44进入内腔体41；达到喷射条件时，尿素喷嘴18直接将雾化的尿素溶液喷入所述内腔体41中；与尿素液滴混合之后的排气分为两路同时进入第一组选择性催化还原剂31以及第二组选择性催化还原剂32，然后经过第二腔体72汇合后，最后从出口15离开。
在本发明图示的实施方式中，所述喷嘴安装部17靠近所述若干开孔44。由于自所述尿素喷嘴18喷射出来的尿素溶液，在远离喷口的位置容易形成死区，容易导致结晶，采用本发明的方案之后，该位置处的尿素溶液能够从所述开孔44中流出来，从而降低了尿素结晶的风险。从尿素喷嘴18喷出来的尿素溶液在所述混合管4的内腔体41内被涡旋的排气包围，从而避免了尿素直接与内壁接触，降低了结晶的风险。涡旋的排气能够提高与雾化的尿素溶液进行混合的均匀性，从而提高了排气处理的效率，使本发明的方案能够满足更严格的排放法规的要求。
由于混合管4的混合结构(例如翅片42、开槽43、开孔44等)具有一定的长度，如果不设置套筒部8，仅仅利用第一腔体71的尺寸可能难以达到安装该混合结构的要求。本发明通过设置套筒部8，在发动机排气后处理装置100的内部增加了安装空间，不局限于发动机排气后处理装置100的整体尺寸，且可以通过调整扩展腔81的体积来灵活调整***的背压，实现标准化设计。
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，其包括用以与发动机的排气相连通的进口、与所述进口连通的第一腔体、与所述第一腔体连通的混合管、位于所述混合管的下游且与所述混合管连通的下游后处理组件以及与所述下游后处理组件连通的出口；所述混合管包括中空的内腔体、围绕在所述内腔体的***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；所述发动机排气后处理装置包括壳体，所述壳体包括第一端板以及与所述第一端板相配合的第一内侧板，其中所述第一内侧板固定在所述第一端板上以在它们之间形成所述第一腔体；其特征在于：所述壳体包括与所述第一腔体连通的扩展腔，所述扩展腔与所述第一腔体分别位于所述第一端板的两侧，其中所述翅片与所述开槽穿过所述第一腔体，且所述翅片与所述开槽被共同收容在所述第一腔体与所述扩展腔中。
  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：所述第一内侧板设有第一开口，所述壳体包括固定在所述第一开口上的套筒部，所述套筒部设有所述扩展腔以及位于所述扩展腔根部的端壁，所述端壁设有供所述混合管穿过的通孔。
  3. 如权利要求2所述的发动机排气后处理装置，其特征在于：所述套筒部焊接在所述第一开口的内侧。
  4. 如权利要求2所述的发动机排气后处理装置，其特征在于：所述混合管与所述通孔的结合处焊接密封。
  5. 如权利要求1所述的发动机排气后处理装置，其特征在于：所述壳体设有对应于所述混合管的喷嘴安装部；所述混合管呈圆筒状，所述混合管包括位于所述翅片的一侧且靠近所述喷嘴安装部的若干开孔。
  6. 如权利要求1所述的发动机排气后处理装置，其特征在于：所述发动机排气后处理装置包括连接在所述进口与所述第一腔体之间的上游后处理组件，所述上游后处理组件包括氧化型催化转换器及/或颗粒捕集器。
  7. 如权利要求1所述的发动机排气后处理装置，其特征在于：所述下游后处理组件包括选择性催化还原剂。
  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：所述选择性催化还原剂包括并排设置的第一组选择性催化还原剂以及第二组选择性催化还原剂，所述第一组选择性催化还原剂与所述第二组选择性催化还原剂并联。
  9. 如权利要求7所述的发动机排气后处理装置，其特征在于：所述第一端板设有分别对应于所述第一组选择性催化还原剂与所述第二组选择性催化还原剂的第二穿孔与第三穿孔，所述壳体包括与所述第一端板相配合的第二内侧板，其中所述第二内侧板覆盖在所述第二穿孔与所述第三穿孔的***以形成第二腔体，所述第二腔体与所述出口连通。
  10. 如权利要求9所述的发动机排气后处理装置，其特征在于：所述壳体包括位于所述 第一内侧板以及第二内侧板***的第一外侧板，所述出口贯穿所述第一外侧板。
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CN205243598U (zh) * 2015-12-18 2016-05-18 天纳克（苏州）排放***有限公司 发动机排气后处理装置
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CN108979801A (zh) * 2017-07-27 2018-12-11 天纳克（苏州）排放***有限公司 发动机排气后处理混合装置

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