CN210195855U - 混合器及包括其的选择性催化还原系统 - Google Patents

混合器及包括其的选择性催化还原系统 Download PDF

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CN210195855U
CN210195855U CN201921234359.XU CN201921234359U CN210195855U CN 210195855 U CN210195855 U CN 210195855U CN 201921234359 U CN201921234359 U CN 201921234359U CN 210195855 U CN210195855 U CN 210195855U
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section
mixer
diverging
pipe
end cover
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Gaunt Ludovic
吕多维克·冈特
Eaves Harrye Pierre-
皮埃尔-伊夫斯·哈利耶
Jian Gao
高健
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Virginia Exhaust Control Technology Development (shanghai) Co Ltd
Faurecia Emissions Control Technologies Development Shanghai Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/24Exhaust 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
    • F01N3/28Construction of catalytic reactors
    • F01N3/2892Exhaust flow directors or the like, e.g. upstream of catalytic device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40Static mixers
    • B01F25/42Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4332Mixers with a strong change of direction in the conduit for homogenizing the flow
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40Static mixers
    • B01F25/42Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4336Mixers with a diverging cross-section
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/18Exhaust 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 methods of operation; Control
    • F01N3/20Exhaust 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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066Selective catalytic reduction [SCR]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00Combination 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
    • F01N2240/20Combination 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

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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)
  • Dispersion Chemistry (AREA)

Abstract

本实用新型提供了一种混合器及包括其的选择性催化还原系统,所述混合器包括主端盖和渐扩管,所述主端盖内为一空腔,所述渐扩管的出口端由所述主端盖的侧壁面插入所述空腔内,所述渐扩管的入口端位于所述主端盖的侧壁面的外部。本实用新型采用渐扩管(变截面)管子取代了常规的直管(恒定截面),有效地降低背压。同时,其还可以在保持原有的包装不变的情况下,达到同等的性能。

Description

混合器及包括其的选择性催化还原系统
技术领域
本实用新型涉及汽车领域,特别涉及一种混合器及包括其的选择性催化还原系统。
背景技术
选择性催化还原法(Selective Catalytic Reduction,SCR)是指在催化剂的作用下,利用还原剂(如氨气、液氨、尿素)来“有选择性”地与烟气中的NOx反应并生成无毒无污染的N2和H2O。
在汽车领域中,选择性催化还原(SCR)是将氮氧化物(NOx)转化为氮气和水的化学过程。通过添加汽车级尿素(称为柴油机尾气处理液DEF),将柴油引擎废气的有害NOx排放转化为无害的氮气和水的一个过程。
常规地,发动机排气后处理系统中,由于混合器的存在,导致系统的背压增加。为了降低因此导致的油耗,应尽可能降低排气系统的背压。降低背压的通常方式是增加开口,但是由于设计限制,这种方法很多情况下不可行。
有鉴于此,本领域技术人员改进了选择性催化还原系统的结构,以期克服上述技术问题。
实用新型内容
本实用新型要解决的技术问题是为了克服现有技术中汽车排气系统的背压增加,导致油耗增大的缺陷,提供一种混合器及包括其的选择性催化还原系统。
本实用新型是通过下述技术方案来解决上述技术问题的:
一种混合器,其特点在于,所述混合器包括主端盖和渐扩管,所述主端盖内为一空腔,所述渐扩管的出口端由所述主端盖的侧壁面插入所述空腔内,所述渐扩管的入口端位于所述主端盖的侧壁面的外部。
根据本实用新型的一个实施例,所述渐扩管通过光滑且渐扩的横截面,形成平滑过渡。
根据本实用新型的一个实施例,所述渐扩管包括连接一体的定截面段和变截面段,所述定截面段位于所述渐扩管的入口端处,所述变截面段位于所述渐扩管的出口端处。
根据本实用新型的一个实施例,所述变截面段为渐扩段,所述渐扩段的形状为直线型,或曲线型。
根据本实用新型的一个实施例,所述渐扩管的管壁上设置有开孔。
根据本实用新型的一个实施例,所述渐扩段的管口端面垂直于所述渐扩段的中心轴线。
根据本实用新型的一个实施例,所述渐扩段的管口端面为斜切面。
根据本实用新型的一个实施例,所述渐扩段的横截面为圆形、椭圆形或圆角矩形。
根据本实用新型的一个实施例,所述渐扩段的横截面为圆形和椭圆形的组合。
本实用新型还提供了一种选择性催化还原系统,其特点在于,所述选择性催化还原系统包括如上所述的混合器。
本实用新型的积极进步效果在于:
本实用新型混合器及包括其的选择性催化还原系统采用渐扩管(变截面)管子取代了常规的直管(恒定截面),有效地降低背压。同时,其还可以在保持原有的包装不变的情况下,达到同等的性能。
附图说明
本实用新型上述的以及其他的特征、性质和优势将通过下面结合附图和实施例的描述而变的更加明显,在附图中相同的附图标记始终表示相同的特征,其中:
图1为本实用新型混合器的立体图。
图2为本实用新型混合器的内部结构透视图。
图3为本实用新型混合器的俯视图。
图4为图3中沿A-A线剖开的剖视图。
图5为图3中沿C-C线剖开的剖视图。
图6为本实用新型混合器中渐变管的结构示意图。
【附图标记】
主端盖 10
渐扩管 20
进气侧法兰 30
出气侧法兰 40
定截面段 21
变截面段 22
渐扩管的出口端 23
渐扩管的入口端 24
具体实施方式
为让本实用新型的上述目的、特征和优点能更明显易懂,以下结合附图对本实用新型的具体实施方式作详细说明。
现在将详细参考附图描述本实用新型的实施例。现在将详细参考本实用新型的优选实施例,其示例在附图中示出。在任何可能的情况下,在所有附图中将使用相同的标记来表示相同或相似的部分。
此外,尽管本实用新型中所使用的术语是从公知公用的术语中选择的,但是本实用新型说明书中所提及的一些术语可能是申请人按他或她的判断来选择的,其详细含义在本文的描述的相关部分中说明。
此外,要求不仅仅通过所使用的实际术语,而是还要通过每个术语所蕴含的意义来理解本实用新型。
图1为本实用新型混合器的立体图。图2为本实用新型混合器的内部结构透视图。图3为本实用新型混合器的俯视图。图4为图3中沿A-A线剖开的剖视图。图5为图3中沿C-C线剖开的剖视图。图6为本实用新型混合器中渐变管的结构示意图。
如图1至图6所示,本实用新型公开了一种混合器,其包括主端盖10和渐扩管20,主端盖10内为一空腔,将渐扩管20的出口端23由主端盖10的侧壁面插入所述空腔内,渐扩管20的入口端24位于主端盖10的侧壁面的外部。
渐扩管20的连接方式可以采用多种形式,如卡箍、焊接或法兰连接等等。本实施例中示出的,在渐扩管20的入口端24安装有一进气侧法兰30,主端盖10的底端安装有一出气侧法兰40。此处法兰连接仅为举例用,渐扩管20的连接方式可以变化,并不受其局限。
优选地,将渐扩管20通过光滑且渐扩的横截面,形成平滑过渡。这样可以减少由于流道截面剧烈突变导致的在管口附近的气流回流,以达到降低背压的目的。
本实施例中,渐扩管20优选为包括连接一体的定截面段21和变截面段22,使得定截面段21位于渐扩管20的入口端24处,变截面段22位于渐扩管20的出口端23处。
特别地,此处变截面段22为渐扩段,所述渐扩段的形状为直线型,或曲线型。曲线弧度可以根据布置的空间进行调整,优化其形状以尽可能地降低背压。
进一步地,渐扩管20的管壁上设置有开孔,或者也可以不开孔,根据实际情况进行设置调节。
更进一步地,所述渐扩段的管口端面可以优选地设置为垂直于所述渐扩段的中心轴线。或者,也可以将所述渐扩段的管口端面设置为斜切面。
此处,所述渐扩段的横截面为圆形、椭圆形或圆角矩形。或者,所述渐扩段的横截面也可以设置为圆形和椭圆形的组合,例如圆形管和椭圆形渐扩管的组合。
对于流经管子的周向旋转气流,渐扩管可以使气流尽量保持贴紧管壁以减少气体回流和额外的背压损失。
本实用新型还提供了一种选择性催化还原系统,其特点在于,所述选择性催化还原系统包括如上所述的混合器。
综上所述,本实用新型混合器及包括其的选择性催化还原系统采用渐扩管(变截面)管子取代了常规的直管(恒定截面),有效地降低背压。同时,其还可以在保持原有的包装不变的情况下,达到同等的性能。
虽然以上描述了本实用新型的具体实施方式,但是本领域的技术人员应当理解,这些仅是举例说明,本实用新型的保护范围是由所附权利要求书限定的。本领域的技术人员在不背离本实用新型的原理和实质的前提下,可以对这些实施方式作出多种变更或修改,但这些变更和修改均落入本实用新型的保护范围。

Claims (10)

1.一种混合器,其特征在于,所述混合器包括主端盖和渐扩管,所述主端盖内为一空腔,所述渐扩管的出口端由所述主端盖的侧壁面插入所述空腔内,所述渐扩管的入口端位于所述主端盖的侧壁面的外部。
2.如权利要求1所述的混合器,其特征在于,所述渐扩管通过光滑且渐扩的横截面,形成平滑过渡。
3.如权利要求1所述的混合器,其特征在于,所述渐扩管包括连接一体的定截面段和变截面段,所述定截面段位于所述渐扩管的入口端处,所述变截面段位于所述渐扩管的出口端处。
4.如权利要求3所述的混合器,其特征在于,所述变截面段为渐扩段,所述渐扩段的形状为直线型,或曲线型。
5.如权利要求4所述的混合器,其特征在于,所述渐扩管的管壁上设置有开孔。
6.如权利要求4所述的混合器,其特征在于,所述渐扩段的管口端面垂直于所述渐扩段的中心轴线。
7.如权利要求4所述的混合器,其特征在于,所述渐扩段的管口端面为斜切面。
8.如权利要求4所述的混合器,其特征在于,所述渐扩段的横截面为圆形、椭圆形或圆角矩形。
9.如权利要求4所述的混合器,其特征在于,所述渐扩段的横截面为圆形和椭圆形的组合。
10.一种选择性催化还原系统,其特征在于,所述选择性催化还原系统包括如权利要求1-9任意一项所述的混合器。
CN201921234359.XU 2019-08-01 2019-08-01 混合器及包括其的选择性催化还原系统 Active CN210195855U (zh)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11828214B2 (en) 2020-05-08 2023-11-28 Cummins Emission Solutions Inc. Configurable aftertreatment systems including a housing
US11891937B2 (en) 2018-07-03 2024-02-06 Cummins Emission Solutions Inc. Body mixing decomposition reactor
US11982219B2 (en) 2017-06-06 2024-05-14 Cummins Emission Solutions Inc. Systems and methods for mixing exhaust gases and reductant in an aftertreatment system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11982219B2 (en) 2017-06-06 2024-05-14 Cummins Emission Solutions Inc. Systems and methods for mixing exhaust gases and reductant in an aftertreatment system
US11891937B2 (en) 2018-07-03 2024-02-06 Cummins Emission Solutions Inc. Body mixing decomposition reactor
US11828214B2 (en) 2020-05-08 2023-11-28 Cummins Emission Solutions Inc. Configurable aftertreatment systems including a housing

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