WO2021223360A1 - 尾气后处理混合装置以及尾气后处理装置 - Google Patents

尾气后处理混合装置以及尾气后处理装置 Download PDF

Info

Publication number
WO2021223360A1
WO2021223360A1 PCT/CN2020/118236 CN2020118236W WO2021223360A1 WO 2021223360 A1 WO2021223360 A1 WO 2021223360A1 CN 2020118236 W CN2020118236 W CN 2020118236W WO 2021223360 A1 WO2021223360 A1 WO 2021223360A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
treatment
plate
mixing
urea
Prior art date
Application number
PCT/CN2020/118236
Other languages
English (en)
French (fr)
Inventor
潘忠原
卓君
汪勇
Original Assignee
天纳克（苏州）排放***有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 天纳克（苏州）排放***有限公司 filed Critical 天纳克（苏州）排放***有限公司
Publication of WO2021223360A1 publication Critical patent/WO2021223360A1/zh

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—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
    • 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 a tail gas post-treatment mixing device and a tail gas post-treatment device, belonging to the technical field of engine tail gas post-treatment.
  • the uniformity of ammonia distribution in the exhaust gas aftertreatment system (such as selective catalytic reduction system, SCR system) pipeline has an important impact on the overall performance and durability of the system. If the ammonia is not uniformly distributed, it will cause too much ammonia in a local area and easily cause ammonia leakage, while in other areas where ammonia is thin, the conversion efficiency of nitrogen oxides (NOx) will be too low. The uneven distribution of ammonia over a long period of time will cause uneven catalyst aging, thereby affecting the overall performance of the catalyst. If the particles of the urea droplets are large, they are not easy to evaporate and are easy to form urea crystals. In severe cases, the exhaust pipe will be blocked and the power performance of the engine will decrease.
  • SCR system selective catalytic reduction system
  • the object of the present invention is to provide an exhaust gas after-treatment mixing device and an exhaust gas after-treatment device that can promote the evaporation of urea droplets.
  • an exhaust gas post-treatment mixing device which includes a shell, a mixing tube located in the shell, and a partition fixed on the periphery of the mixing tube; the shell There is an installation part for installing a urea nozzle, the urea nozzle is used to spray atomized urea droplets into the mixing tube; the partition divides the housing into a first space and a second space, The partition includes a first plate on one side of the mixing pipe, a second plate on the other side of the mixing pipe, and a third plate connecting the first plate and the second plate The third plate is provided with a through hole for the mixing tube to pass through; the mixing tube includes a first tube portion located in the first space and a second tube located in the second space Part, wherein the first tube part is provided with at least two first openings respectively located on both sides of the first opening, and the first opening is communicated with the first space; the second tube part is provided with two At least two second openings on the side,
  • the first wing is provided with a first arc-shaped surface fixed on the inner wall of the mixing tube
  • the second wing is provided with a first arc-shaped surface fixed on the inner wall of the mixing tube The second curved surface.
  • the height of the first wing portion and the second wing portion are the same, and the first wing portion and the second wing portion are parallel to the bottom wall.
  • the first pipe portion is provided with a first circumferential wall located between the two first openings and exposed in the first space, and the first circumferential wall A number of perforations communicated with the first space are provided.
  • the urea crushing plate includes an extension portion extending horizontally from the bottom wall to the first circumferential wall, and the extension portion protrudes from the first wing portion and the first wing portion in the horizontal direction.
  • the second wing is a further improved technical solution of the present invention.
  • the extension part is suspended in the mixing tube.
  • the housing is provided with a first axis
  • the mixing tube is provided with a second axis
  • the first axis is perpendicular to the second axis
  • the mixing tube is arranged vertically
  • the first plate and the second plate both extend vertically and extend in opposite directions, and the third plate extends horizontally.
  • the first plate is provided with a first arc-shaped surface that abuts on the first tube portion
  • the second plate is provided with a first arc-shaped surface that abuts on the second tube.
  • the second curved surface on the part.
  • the exhaust gas post-treatment mixing device includes a plate located at the bottom of the mixing pipe, and an arc-shaped protrusion protruding into the second pipe portion is arranged in the middle of the plate.
  • the present invention also relates to an exhaust gas after-treatment device, which includes an upstream exhaust gas after-treatment package, a downstream exhaust gas after-treatment package, and a connecting pipe connecting the upstream exhaust gas after-treatment package and the downstream exhaust gas after-treatment package;
  • the processing package is U-shaped and includes a first post-processing unit, a second post-processing unit, and a connecting housing connecting the first post-processing unit and the second post-processing unit;
  • the downstream exhaust gas after-processing package includes the aforementioned The exhaust gas after-treatment mixing device and a third after-treatment unit located downstream of the exhaust gas after-treatment mixing device;
  • the connecting pipe is provided with a flexible junction.
  • the present invention can break the urea droplets into smaller particles by arranging the urea crushing plate in the mixing tube, which promotes the evaporation of the urea droplets and reduces the risk of urea crystallization.
  • Fig. 1 is a schematic diagram of an exhaust gas after-treatment device of the present invention.
  • Fig. 2 is a partial three-dimensional exploded view of the downstream exhaust gas after-treatment package in Fig. 1.
  • Fig. 3 is a three-dimensional schematic diagram of the exhaust gas after-treatment mixing device in Fig. 2.
  • Fig. 4 is a perspective schematic view of Fig. 3 from another angle.
  • Fig. 5 is a left side view of Fig. 4.
  • Fig. 6 is a right side view of Fig. 4.
  • Fig. 7 is a schematic cross-sectional view taken along line A-A in Fig. 4.
  • Fig. 8 is a schematic cross-sectional view taken along the line B-B in Fig. 5.
  • Fig. 9 is a perspective schematic view after removing the housing in Fig. 4.
  • Fig. 10 is an exploded perspective view of Fig. 9.
  • the present invention discloses an exhaust gas after-treatment device 100, which is used to treat exhaust gas from a diesel engine.
  • the exhaust gas after-treatment device 100 includes an upstream exhaust gas after-treatment package 200 and a downstream exhaust gas after-treatment device.
  • the upstream exhaust gas after-treatment package 200 is approximately U-shaped, and includes a first after-treatment unit 201 (for example, a diesel oxidation catalyst, DOC), and a second after-treatment unit 202 (for example, diesel particulates).
  • the downstream exhaust gas after-treatment package 300 includes an exhaust gas after-treatment mixing device 301 and a third after-treatment unit 302 (for example, selective catalytic reduction agent, SCR) located downstream of the exhaust gas after-treatment mixing device 301.
  • the connecting pipe 400 is provided with a flexible junction 401 to absorb vibration.
  • the exhaust gas post-treatment mixing device 301 includes a casing 1, a mixing tube located in the casing 1, a partition board 3 fixed on the periphery of the mixing tube 2, and a urea crushing in the middle of the mixing tube 2 The plate 4 and the plate 5 located at the bottom of the mixing tube 2.
  • the housing 1 is cylindrical and is provided with a first axis 10; the mixing tube 2 is cylindrical and is provided with a second axis.
  • the axis 20, the first axis 10 and the second axis 20 intersect.
  • the first axis 10 is perpendicular to the second axis 20.
  • the housing 1 and the mixing tube 2 may also have other shapes, such as oval shapes.
  • the housing 1 is provided with an installation part 11 for installing a urea nozzle (not shown), and the urea nozzle is used for spraying atomized urea droplets into the mixing tube 2.
  • the partition 3 divides the housing 1 into a first space 311 for communicating with the upstream exhaust gas after-treatment package 200 and a second space 312 for communicating with the third after-treatment unit 302.
  • the partition 3 is roughly Z-shaped, which includes a first plate 31 located on one side of the mixing tube 2 and a second plate located on the other side of the mixing tube 2 A sheet 32 and a third sheet 33 connecting the first sheet 31 and the second sheet 32.
  • the third plate 33 is provided with a through hole 34 for the mixing tube 2 to pass through.
  • the mixing tube 2 is arranged vertically; the first plate 31 and the second plate 32 both extend vertically and extend in opposite directions, and the third plate 33 Extend horizontally. Specifically, as shown in FIG.
  • the first plate 31 is located at the upper right of the mixing tube 2, and the second plate 32 is located at the lower left of the mixing tube 2.
  • the middle of the first plate 31 is provided with a first arc-shaped surface 35 that abuts on the mixing tube 2
  • the middle of the second plate 32 is provided with a first arcuate surface 35 that abuts on the mixing tube 2.
  • the mixing pipe 2 includes a first pipe portion 21 located in the first space 311 and a second pipe portion 22 located in the second space 312, wherein the first pipe portion 21 is provided with two At least two first openings 211 on the side, the second tube portion 22 is provided with at least two second openings 221 located on both sides of the second tube portion 22, and the first opening 211 is communicated with the first space 311, so The second opening 221 communicates with the second space 312.
  • the first opening 211 is used for air flow in, and the second opening 221 is used for air flow out, so as to form a double swirling effect.
  • the first pipe portion 21 is further provided with a first circumferential wall 23 located between the two first openings 211 and exposed in the first space 311, so The first circumferential wall 23 is provided with a plurality of through holes 231 communicating with the first space 311.
  • the exhaust gas in the first space 311 can enter the mixing pipe 2 from the first opening 211 and the perforation 231.
  • the perforation 231 can improve the airflow distribution and adjust the back pressure.
  • the first tube portion 21 is further provided with a second circumferential wall 24 opposite to the first circumferential wall 23, and the second circumferential wall 24 is used to abut on the first arc-shaped portion of the first tube portion 21 ⁇ 35 ⁇ .
  • the second tube portion 22 is provided with a third circumferential wall 25 located below the first circumferential wall 23, and the third circumferential wall 25 is used to abut on the second arc shape of the second tube portion 22 ⁇ 36 ⁇ .
  • the urea crushing plate 4 is used to crush the urea droplets ejected from the urea nozzle, so as to break the urea droplets into smaller particles, thereby facilitating the evaporation of urea and reducing the risk of urea crystallization.
  • the urea crushing plate 4 includes a bottom wall 41, a side wall 42 extending upward from both sides of the bottom wall 41, and a first wing portion 43 and a second wing portion extending from the side wall 42 to both sides. 44, wherein the first wing 43 and the second wing 44 are respectively fixed at positions close to the lower edge of the first opening 211.
  • the first wing 43 is provided with a first arc-shaped surface 431 fixed on the inner wall of the mixing tube 2 and the second wing 44 is provided with a second arc fixed on the inner wall of the mixing tube 2. ⁇ 441 ⁇ ⁇ 441.
  • the height of the first wing 43 and the second wing 44 are the same, and the first wing 43 and the second wing 44 are parallel to the bottom wall 41.
  • the urea crushing plate 4 further includes an extension portion 45 that extends horizontally from the bottom wall 41 to the first circumferential wall 23, and the extension portion 45 protrudes from the first wing portion 43 and the first wing portion 43 in the horizontal direction.
  • the second wing 44 is provided with a first arc-shaped surface 431 fixed on the inner wall of the mixing tube 2
  • the second wing 44 is provided with a second arc fixed on the inner wall of the mixing tube 2. ⁇ 441 ⁇ ⁇ 441.
  • the height of the first wing 43 and the second wing 44 are the same, and the first wing 43 and the second wing
  • the extension part 45 is suspended in the mixing tube 2, that is, the extension part 45 does not contact the inner wall of the mixing tube 2.
  • the urea crushing plate 4 can play the role of crushing urea, and at the same time, it will not excessively increase the back pressure of the system.
  • the plate 5 is located at the lower end of the second pipe portion 22, and an arc-shaped protrusion 51 protruding toward the second pipe portion 22 is provided in the middle of the plate 5 to guide the airflow to flow in the opposite direction. Form a double swirl.
  • the plate 5 is hermetically installed at the lower end of the second tube portion 22, and the plate 5 can prevent the urea droplets from being directly sprayed onto the housing 1, which also reduces The risk of urea crystallization.
  • the exhaust gas of the engine enters the first space 311
  • the exhaust gas enters the mixing pipe 2 from the first opening 211 and the perforation 231
  • the urea nozzle enters the mixing pipe 2
  • the atomized urea droplets are mixed with the exhaust gas of the engine and move downstream; the urea droplets hit on the urea crushing plate 4 are further broken into smaller particles, which facilitates the evaporation of urea;
  • the second opening 221 enters the second space 312 and reaches the third post-processing unit 302 located downstream. Under the action of the plate 5, it can better make the air flow reverse (for example, upward) to form a double swirl flow.
  • the distance and time of urea evaporation are increased through the swirling flow, the uniformity of air flow mixing is improved, and the risk of urea crystallization is further reduced.

Landscapes

  • 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)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

一种尾气后处理混合装置（301），其包括壳体（1）、位于所述壳体（1）内的混合管（2）以及固定在所述混合管（2）的***的隔板（3）；所述壳体（1）上设有用以安装尿素喷嘴的安装部（11），所述尿素喷嘴用以向所述混合管（2）中喷射雾化的尿素液滴；所述尾气后处理混合装置（301）还包括位于所述混合管（2）中的尿素破碎板（4），所述尿素破碎板（4）包括底壁（41）、自所述底壁（41）的两侧向上延伸的侧壁（42）、以及自所述侧壁（42）分别向两侧延伸的第一翼部（43）与第二翼部（44）。还涉及一种包括尾气后处理混合装置（301）的尾气后处理装置（100）。相较于现有技术，通过设置位于所述混合管（2）中的尿素破碎板（4），能够将尿素液滴破碎成更小的颗粒，促进了尿素液滴的蒸发，降低了尿素结晶风险。

Description

尾气后处理混合装置以及尾气后处理装置
本申请要求了申请日为2020年05月07日、申请号为202010379126.X、发明名称为“尾气后处理混合装置以及尾气后处理装置”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混合装置以及尾气后处理装置，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***(例如选择性催化还原***，SCR***)管路中氨分布的均匀程度对***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。如果尿素液滴的颗粒较大，其不易蒸发，容易形成尿素结晶，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能够促进尿素液滴蒸发的尾气后处理混合装置以及尾气后处理装置。
为实现上述目的，本发明采用如下技术方案：一种尾气后处理混合装置，其包括壳体、位于所述壳体内的混合管以及固定在所述混合管的***的隔板；所述壳体上设有用以安装尿素喷嘴的安装部，所述尿素喷嘴用以向所述混合管中喷射雾化的尿素液滴；所述隔板将所述壳体分隔成第一空间以及第二空间，所述隔板包括位于所述混合管一侧的第一板片、位于所述混合管另 一侧的第二板片以及连接所述第一板片与所述第二板片的第三板片，所述第三板片设有供所述混合管穿过的通孔；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，所述第一开口与所述第一空间相连通；所述第二管部设有分别位于其两侧的至少两个第二开口，所述第二开口与所述第二空间相连通；所述尾气后处理混合装置还包括位于所述混合管中的尿素破碎板，所述尿素破碎板包括底壁、自所述底壁的两侧向上延伸的侧壁、以及自所述侧壁分别向两侧延伸的第一翼部与第二翼部，其中所述第一翼部与所述第二翼部分别固定在靠近所述第一开口的下边缘的位置。
作为本发明进一步改进的技术方案，所述第一翼部设有固定在所述混合管的内壁上的第一弧形面，所述第二翼部设有固定在所述混合管的内壁上的第二弧形面。
作为本发明进一步改进的技术方案，所述第一翼部与所述第二翼部的高度相同，所述第一翼部与所述第二翼部平行于所述底壁。
作为本发明进一步改进的技术方案，所述第一管部设有位于两个所述第一开口之间且暴露在所述第一空间内的第一周向壁，所述第一周向壁设有与所述第一空间相连通的若干穿孔。
作为本发明进一步改进的技术方案，所述尿素破碎板包括自所述底壁向所述第一周向壁水平延伸的延伸部，所述延伸部在水平方向凸出所述第一翼部与所述第二翼部。
作为本发明进一步改进的技术方案，所述延伸部悬空设置在所述混合管中。
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，所述第一轴线垂直于所述第二轴线；所述混合管竖直布置；所述第一板片与所述第二板片均竖直延伸且延伸方向相反，所述第三板片水平延伸。
作为本发明进一步改进的技术方案，所述第一板片设有贴靠在所述第一 管部上的第一弧形面，所述第二板片设有贴靠在所述第二管部上的第二弧形面。
作为本发明进一步改进的技术方案，所述尾气后处理混合装置包括位于所述混合管底部的板片，所述板片的中间设有向所述第二管部内凸伸的弧形凸起。
本发明还涉及一种尾气后处理装置，其包括上游尾气后处理封装、下游尾气后处理封装以及连接所述上游尾气后处理封装与所述下游尾气后处理封装的连接管；所述上游尾气后处理封装呈U形，其包括第一后处理单元、第二后处理单元以及连接所述第一后处理单元与所述第二后处理单元的连接壳体；所述下游尾气后处理封装包括前述的尾气后处理混合装置以及位于所述尾气后处理混合装置的下游的第三后处理单元；所述连接管设有挠性结。
相较于现有技术，本发明通过设置位于所述混合管中的尿素破碎板，能够将尿素液滴破碎成更小的颗粒，促进了尿素液滴的蒸发，降低了尿素结晶风险。
附图说明
图1是本发明尾气后处理装置的示意图。
图2是图1中下游尾气后处理封装的部分立体分解图。
图3是图2中尾气后处理混合装置的立体示意图。
图4是图3另一角度的立体示意图。
图5是图4的左视图。
图6是图4的右视图。
图7是沿图4中A-A线的剖面示意图。
图8是沿图5中B-B线的剖面示意图。
图9是去除图4中壳体之后的立体示意图。
图10是图9的立体分解图。
具体实施方式
请参照图1至图10所示，本发明揭示了一种尾气后处理装置100，其用于处理柴油发动机的尾气，所述尾气后处理装置100包括上游尾气后处理封装200、下游尾气后处理封装300以及连接所述上游尾气后处理封装200与所述下游尾气后处理封装300的连接管400。在本发明图示的实施方式中，所述上游尾气后处理封装200大致呈U形，其包括第一后处理单元201(例如柴油氧化催化剂，DOC)、第二后处理单元202(例如柴油颗粒捕集器，DPF)以及连接所述第一后处理单元201与所述第二后处理单元202的连接壳体203。所述下游尾气后处理封装300包括尾气后处理混合装置301以及位于所述尾气后处理混合装置301的下游的第三后处理单元302(例如选择性催化还原剂，SCR)。所述连接管400设有挠性结401，以吸收振动。
所述尾气后处理混合装置301包括壳体1、位于所述壳体1内的混合管2、固定在所述混合管2的***的隔板3、位于所述混合管2的中部的尿素破碎板4以及位于所述混合管2的底部的板片5。
请参照图3所示，在本发明图示的实施方式中，所述壳体1呈圆筒状，其设有第一轴线10；所述混合管2呈圆筒状，其设有第二轴线20，所述第一轴线10与所述第二轴线20交叉。优选地，所述第一轴线10垂直于所述第二轴线20。当然，在其他实施方式中，所述壳体1与所述混合管2也可以是其他形状，例如椭圆形等。所述壳体1上设有用以安装尿素喷嘴(未图示)的安装部11，所述尿素喷嘴用以向所述混合管2中喷射雾化的尿素液滴。
所述隔板3将所述壳体1分隔成用以与上游尾气后处理封装200相连通的第一空间311以及用以与第三后处理单元302相连通的第二空间312。请参照图9及图10所示，所述隔板3大致呈Z形，其包括位于所述混合管2一侧的第一板片31、位于所述混合管2另一侧的第二板片32以及连接所述第一板片31与所述第二板片32的第三板片33。所述第三板片33设有供所述混合管2穿过的通孔34。在本发明图示的实施方式中，所述混合管2竖直布置；所述第一板片31与所述第二板片32均竖直延伸且延伸方向相反， 所述第三板片33水平延伸。具体地，如图9所示，所述第一板片31位于所述混合管2的右上方，所述第二板片32位于所述混合管2的左下方。所述第一板片31的中部设有贴靠在所述混合管2上的第一弧形面35，所述第二板片32的中部设有贴靠在所述混合管2上的第二弧形面36。
所述混合管2包括位于所述第一空间311内的第一管部21以及位于所述第二空间312内的第二管部22，其中所述第一管部21设有分别位于其两侧的至少两个第一开口211，所述第二管部22设有分别位于其两侧的至少两个第二开口221，所述第一开口211与所述第一空间311相连通，所述第二开口221与所述第二空间312相连通。所述第一开口211用以供气流进入，所述第二开口221用以供气流流出，以形成双旋流的效果。在本发明图示的实施方式中，所述第一管部21还设有位于两个所述第一开口211之间且暴露在所述第一空间311内的第一周向壁23，所述第一周向壁23设有与所述第一空间311相连通的若干穿孔231。所述第一空间311内的尾气可以自所述第一开口211以及所述穿孔231进入到所述混合管2中。所述穿孔231能够起到改善气流分布以及调节背压的作用。所述第一管部21还设有与所述第一周向壁23相对的第二周向壁24，所述第二周向壁24用以贴靠在所述第一管部21上的第一弧形面35上。所述第二管部22设有位于所述第一周向壁23的下方的第三周向壁25，所述第三周向壁25用以贴靠在所述第二管部22上的第二弧形面36上。
所述尿素破碎板4顾名思义用以破碎从尿素喷嘴喷射出来的尿素液滴，以将尿素液滴破碎成体积更小的颗粒，从而便于尿素蒸发，降低尿素结晶风险。所述尿素破碎板4包括底壁41、自所述底壁41的两侧向上延伸的侧壁42、以及自所述侧壁42分别向两侧延伸的第一翼部43与第二翼部44，其中所述第一翼部43与所述第二翼部44分别固定在靠近所述第一开口211的下边缘的位置。所述第一翼部43设有固定在所述混合管2的内壁上的第一弧形面431，所述第二翼部44设有固定在所述混合管2的内壁上的第二弧形面441。所述第一翼部43与所述第二翼部44的高度相同，所述第一翼部 43与所述第二翼部44平行于所述底壁41。此外，所述尿素破碎板4还包括自所述底壁41向所述第一周向壁23水平延伸的延伸部45，所述延伸部45在水平方向凸出所述第一翼部43与所述第二翼部44。所述延伸部45悬空设置在所述混合管2中，即所述延伸部45未接触所述混合管2的内壁。如此设置，尿素破碎板4能够起到破碎尿素的作用，同时，也不至于过度增大***的背压。
所述板片5位于所述第二管部22的下端，所述板片5的中间设有向所述第二管部22凸伸的弧形凸起51，以导引气流反向流动，形成双旋流。在本发明图示的实施方式中，所述板片5密封安装在所述第二管部22的下端，所述板片5能够避免尿素液滴被直接喷射到壳体1上，也降低了尿素结晶的风险。
在本发明图示的实施方式中，当发动机的尾气进入到第一空间311内时，尾气自第一开口211以及穿孔231进入混合管2；当满足喷射条件时，尿素喷嘴向混合管2中喷射尿素，雾化的尿素液滴与发动机的尾气一起混合并向下游移动；打在尿素破碎板4上的尿素液滴被进一步破碎成体积更小的颗粒，从而便于尿素蒸发；随后，气流自第二开口221进入到第二空间312内，并到达位于下游的第三后处理单元302。在板片5的作用下，其能够更好地使气流反向(例如向上)流动以形成双旋流。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，进一步降低了尿素结晶的风险。
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. 一种尾气后处理混合装置，其包括壳体、位于所述壳体内的混合管以及固定在所述混合管的***的隔板；所述壳体上设有用以安装尿素喷嘴的安装部，所述尿素喷嘴用以向所述混合管中喷射雾化的尿素液滴；所述隔板将所述壳体分隔成第一空间以及第二空间，所述隔板包括位于所述混合管一侧的第一板片、位于所述混合管另一侧的第二板片以及连接所述第一板片与所述第二板片的第三板片，所述第三板片设有供所述混合管穿过的通孔；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，所述第一开口与所述第一空间相连通；所述第二管部设有分别位于其两侧的至少两个第二开口，所述第二开口与所述第二空间相连通；其特征在于：所述尾气后处理混合装置还包括位于所述混合管中的尿素破碎板，所述尿素破碎板包括底壁、自所述底壁的两侧向上延伸的侧壁、以及自所述侧壁分别向两侧延伸的第一翼部与第二翼部，其中所述第一翼部与所述第二翼部分别固定在靠近所述第一开口的下边缘的位置。
  2. 如权利要求1所述的尾气后处理混合装置，其特征在于：所述第一翼部设有固定在所述混合管的内壁上的第一弧形面，所述第二翼部设有固定在所述混合管的内壁上的第二弧形面。
  3. 如权利要求2所述的尾气后处理混合装置，其特征在于：所述第一翼部与所述第二翼部的高度相同，所述第一翼部与所述第二翼部平行于所述底壁。
  4. 如权利要求1所述的尾气后处理混合装置，其特征在于：所述第一管部设有位于两个所述第一开口之间且暴露在所述第一空间内的第一周向壁，所述第一周向壁设有与所述第一空间相连通的若干穿孔。
  5. 如权利要求4所述的尾气后处理混合装置，其特征在于：所述尿素 破碎板包括自所述底壁向所述第一周向壁水平延伸的延伸部，所述延伸部在水平方向凸出所述第一翼部与所述第二翼部。
  6. 如权利要求5所述的尾气后处理混合装置，其特征在于：所述延伸部悬空设置在所述混合管中。
  7. 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，所述第一轴线垂直于所述第二轴线；所述混合管竖直布置；所述第一板片与所述第二板片均竖直延伸且延伸方向相反，所述第三板片水平延伸。
  8. 如权利要求7所述的尾气后处理混合装置，其特征在于：所述第一板片设有贴靠在所述第一管部上的第一弧形面，所述第二板片设有贴靠在所述第二管部上的第二弧形面。
  9. 如权利要求1所述的尾气后处理混合装置，其特征在于：所述尾气后处理混合装置包括位于所述混合管底部的板片，所述板片的中间设有向所述第二管部内凸伸的弧形凸起。
  10. 一种尾气后处理装置，其包括上游尾气后处理封装、下游尾气后处理封装以及连接所述上游尾气后处理封装与所述下游尾气后处理封装的连接管；所述上游尾气后处理封装呈U形，其包括第一后处理单元、第二后处理单元以及连接所述第一后处理单元与所述第二后处理单元的连接壳体；其特征在于：所述下游尾气后处理封装包括如权利要求1至9项中任意一项所述的尾气后处理混合装置以及位于所述尾气后处理混合装置的下游的第三后处理单元；所述连接管设有挠性结。
PCT/CN2020/118236 2020-05-07 2020-09-28 尾气后处理混合装置以及尾气后处理装置 WO2021223360A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010379126.XA CN111425284A (zh) 2020-05-07 2020-05-07 尾气后处理混合装置以及尾气后处理装置
CN202010379126.X 2020-05-07

Publications (1)

Publication Number Publication Date
WO2021223360A1 true WO2021223360A1 (zh) 2021-11-11

Family

ID=71551403

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/118236 WO2021223360A1 (zh) 2020-05-07 2020-09-28 尾气后处理混合装置以及尾气后处理装置

Country Status (2)

Country Link
CN (1) CN111425284A (zh)
WO (1) WO2021223360A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111425284A (zh) * 2020-05-07 2020-07-17 天纳克（苏州）排放***有限公司 尾气后处理混合装置以及尾气后处理装置
CN114432946A (zh) * 2022-02-09 2022-05-06 无锡威孚力达催化净化器有限责任公司 双出口旋流气液混合装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015012829A1 (en) * 2013-07-25 2015-01-29 Faurecia Emissions Control Technologies, Usa, Llc Mixer with swirl box for a vehicle exhaust system
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
CN108757109A (zh) * 2018-07-11 2018-11-06 天纳克（苏州）排放***有限公司 U形排气后处理装置
US10287948B1 (en) * 2018-04-23 2019-05-14 Faurecia Emissions Control Technologies, Usa, Llc High efficiency mixer for vehicle exhaust system
CN209413971U (zh) * 2019-01-10 2019-09-20 天纳克（苏州）排放***有限公司 发动机排气后处理混合装置
CN110332034A (zh) * 2019-08-23 2019-10-15 无锡威孚力达催化净化器有限责任公司 竖置scr后处理尿素混合装置
CN111425284A (zh) * 2020-05-07 2020-07-17 天纳克（苏州）排放***有限公司 尾气后处理混合装置以及尾气后处理装置
CN212027907U (zh) * 2020-05-07 2020-11-27 天纳克（苏州）排放***有限公司 尾气后处理混合装置以及尾气后处理装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015012829A1 (en) * 2013-07-25 2015-01-29 Faurecia Emissions Control Technologies, Usa, Llc Mixer with swirl box for a vehicle exhaust system
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
US10287948B1 (en) * 2018-04-23 2019-05-14 Faurecia Emissions Control Technologies, Usa, Llc High efficiency mixer for vehicle exhaust system
CN108757109A (zh) * 2018-07-11 2018-11-06 天纳克（苏州）排放***有限公司 U形排气后处理装置
CN209413971U (zh) * 2019-01-10 2019-09-20 天纳克（苏州）排放***有限公司 发动机排气后处理混合装置
CN110332034A (zh) * 2019-08-23 2019-10-15 无锡威孚力达催化净化器有限责任公司 竖置scr后处理尿素混合装置
CN111425284A (zh) * 2020-05-07 2020-07-17 天纳克（苏州）排放***有限公司 尾气后处理混合装置以及尾气后处理装置
CN212027907U (zh) * 2020-05-07 2020-11-27 天纳克（苏州）排放***有限公司 尾气后处理混合装置以及尾气后处理装置

Also Published As

Publication number Publication date
CN111425284A (zh) 2020-07-17

Similar Documents

Publication Publication Date Title
US11208933B2 (en) Exhaust gas after-treatment mixing device
WO2018153162A1 (zh) 尾气后处理装置
US10704448B2 (en) Exhaust gas after-treatment mixing device and package therefor
WO2018068667A1 (zh) 尾气后处理装置
WO2018006718A1 (zh) 尾气后处理装置
WO2019144600A1 (zh) 排气后处理装置
WO2021223360A1 (zh) 尾气后处理混合装置以及尾气后处理装置
WO2018006719A1 (zh) 尾气后处理装置
WO2019144602A1 (zh) 排气后处理装置
WO2018095141A1 (zh) 排气后处理装置
WO2018149053A1 (zh) 尾气后处理装置
CN111485980A (zh) 混合组件
WO2018006720A1 (zh) 混合组件
WO2017215461A1 (zh) 尾气后处理装置
CN107489502B (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
US10273849B2 (en) Injection module and exhaust system having an injection module
WO2019128164A1 (zh) 尾气后处理混合装置及其封装
WO2019140865A1 (zh) 尾气后处理装置
CN213450557U (zh) 混合腔组件以及尾气后处理封装
WO2021212742A1 (zh) 尾气后处理封装
US11187132B2 (en) Exhaust gas after-treatment mixing device
WO2019140895A1 (zh) 排气后处理装置
CN111425285A (zh) 混合管组件以及尾气后处理装置
WO2019144599A1 (zh) 排气入口管及其排气后处理装置

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: 20934583

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: 20934583

Country of ref document: EP

Kind code of ref document: A1