CN107165705A - Engine exhaust post-processes mixing arrangement and its after-treatment device and application - Google Patents

Engine exhaust post-processes mixing arrangement and its after-treatment device and application Download PDF

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Publication number
CN107165705A
CN107165705A CN201710624811.2A CN201710624811A CN107165705A CN 107165705 A CN107165705 A CN 107165705A CN 201710624811 A CN201710624811 A CN 201710624811A CN 107165705 A CN107165705 A CN 107165705A
Authority
CN
China
Prior art keywords
mixing arrangement
engine exhaust
post
exhaust
fine fibre
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
CN201710624811.2A
Other languages
Chinese (zh)
Inventor
李军良
王天宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tenneco Suzhou Emission System Co Ltd
Original Assignee
Tenneco Suzhou Emission System Co Ltd
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 Tenneco Suzhou Emission System Co Ltd filed Critical Tenneco Suzhou Emission System Co Ltd
Priority to CN201710624811.2A priority Critical patent/CN107165705A/en
Publication of CN107165705A publication Critical patent/CN107165705A/en
Priority to PCT/CN2018/084375 priority patent/WO2019019725A1/en
Withdrawn legal-status Critical Current

Links

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
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • 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

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

Abstract

A kind of engine exhaust post-processes mixing arrangement, and it includes ribbon mixer and the mounting seat to install urea nozzle, and the ribbon mixer by exhaust to be directed to helical airflow to be mixed with the urea droplets.The engine exhaust post processing mixing arrangement also includes the fine fibre element for being located at the downstream of the ribbon mixer along flow direction of exhaust gases, wherein described fine fibre element is passed through with for the exhaust and the urea droplets, further to increase the broken of the urea droplets and evaporate.It is arranged such, the present invention has stronger Crystallization.The invention further relates to a kind of application of fine fibre element in the engine exhaust post-processes mixing arrangement and the exhaust post-treatment apparatus of engine with the mixing arrangement.

Description

Engine exhaust post-processes mixing arrangement and its after-treatment device and application
Technical field
The present invention relates to a kind of engine exhaust post processing mixing arrangement and its after-treatment device and application, belong to engine Exhaust gas aftertreatment techniques field.
Background technology
Current is all that urea droplets and the mixing of exhaust are reached with blender metal structure in the industry.Generally, in blender The structures such as middle setting porous plate, fin, allow the blender of urea droplets and metal structure to collide so that urea droplets are broken Smaller drop is broken into, to be conducive to evaporating and being pyrolyzed in metal surface.Present situation is due to the upgrading of Abgasgesetz so that current Urea injection strategy is more radical, for example, begin to larger urea injecting quantity under lower temperature, smaller extraction flow. Here there is the relation of heat conservation, one is heat required for urea droplets evaporation and pyrolysis, one be exhaust from The heat that upstream is brought.Due to the radicalization of above-mentioned injection strategy, the carried total amount of heat of exhaust and urea liquid fully steam The ratio between heat required for hair, pyrolysis is constantly reduced.It is EER ratio to describe this heat to one inside industry Relation between amount.In general, EER values are extremely low in the crystallization risk of 150 mixer described above.If EER is no so high, but It is that its Crystallization can improve if optimized by the structure to blender, this is also industry portion big absolutely How the R＆D direction of branch company, i.e., optimize the structure design of blender.
It please join shown in Fig. 1 and Fig. 2, perforated panel 1 ' is provided with blender 3 '.The perforated panel 1 ' is provided with some supply and discharges Some perforates 2 ' that gas and the mixture of urea droplets are passed through.On the one hand, the urea droplets beaten on perforated panel 1 ' are conducive to reality Existing its crushes to obtain the urea droplets that volume is smaller, so as to be more conducive to its evaporation and be pyrolyzed.On the other hand, in order to ensure perforate Plate 1 ' possesses enough mechanical strengths, and the material part between perforate 2 ' is unavoidable.It is appreciated that in perforated panel 1 ' The back side, the flow velocity of air-flow compares relatively low, easily forms local low regime M.Theoretical and experimental results are proved, in the low speed The possibility that urea crystals occur in area M is very big.
Therefore, it is necessary to provide a kind of new solution to solve above-mentioned technical barrier.
The content of the invention
It is an object of the invention to provide a kind of stronger engine exhaust post processing mixing arrangement of Crystallization, one kind Application of the fine fibre element in the engine exhaust post-processes mixing arrangement and the engine exhaust with the mixing arrangement After-treatment device.
To achieve the above object, the present invention is adopted the following technical scheme that：A kind of engine exhaust post-processes mixing arrangement, its Including ribbon mixer and to install the mounting seat of urea nozzle, the urea nozzle is used to after the engine exhaust Handle mixing arrangement in jet atomization urea droplets, the ribbon mixer to by exhaust be directed to helical airflow with The urea droplets are mixed, and the engine exhaust post processing mixing arrangement also includes along flow direction of exhaust gases positioned at described The fine fibre element in the downstream of ribbon mixer, wherein the fine fibre element is with for the exhaust and the urea droplets Pass through, further to increase the broken of the urea droplets and evaporate.
As further improved technical scheme of the present invention, the engine exhaust post processing mixing arrangement includes housing, The mounting seat formation is fixed on the housing；The ribbon mixer includes central shaft and from described central axial The helical blade extended out outside.
As further improved technical scheme of the present invention, the two ends of the central shaft are closings.
As further improved technical scheme of the present invention, the central shaft is solid.
As further improved technical scheme of the present invention, the ribbon mixer is fixed in the housing, the spiral shell Vane piece is provided with some perforation.
As further improved technical scheme of the present invention, the fine fibre element is steel wool or foam metal.
As further improved technical scheme of the present invention, the engine exhaust post processing mixing arrangement is provided with fixed institute State the support of fine fibre element.
As further improved technical scheme of the present invention, the support includes the positioned at the fine fibre element side One sieve-like support and the second sieve-like support positioned at the fine fibre element opposite side.
The invention further relates to a kind of application of fine fibre element in above-mentioned engine exhaust post-processes mixing arrangement.
The invention further relates to a kind of exhaust post-treatment apparatus of engine, it includes above-mentioned engine exhaust post processing mixing Device and the selective catalytic reducing agent (SCR) positioned at the downstream of engine exhaust post processing mixing arrangement.
Compared to prior art, the present invention makes urea droplets on the surface of fine fibre element by setting fine fibre element Occur with inside sufficiently broken with mixing.Further, since the line footpath of fine fibre element is smaller, space is complicated, and heat transfer area is big, Urea droplets are conducive to occur relatively sufficiently heat exchange with exhaust, so as to beneficial to the evaporation and pyrolysis of urea droplets, improve resistive connection Brilliant ability.
Brief description of the drawings
Fig. 1 is to increase the diagrammatic cross-section of porous plate in mixing tube in the prior art.
Fig. 2 is the diagrammatic cross-section of porous plate in Fig. 1, wherein the exhaust indicated and the flow direction of the mixture of urea droplets with And the dead band at the back side.
Fig. 3 is the schematic perspective view of inventive engine exhaust gas post-treatment device.
Fig. 4 is Fig. 3 part isometric exploded view.
Fig. 5 is the schematic perspective view of engine exhaust post processing mixing arrangement in Fig. 4.
Fig. 6 is to remove the stereogram in Fig. 5 after housing.
Fig. 7 is the three-dimensional exploded view of engine exhaust post processing mixing arrangement in Fig. 4.
Fig. 8 is the diagrammatic cross-section of the line A-A along along Fig. 5.
Embodiment
It please join shown in Fig. 3 to Fig. 8, present invention is disclosed a kind of exhaust post-treatment apparatus of engine 100, for such as SCR Deng in after-treatment system to handle the tail gas of engine.The exhaust post-treatment apparatus of engine 100 is included after engine exhaust Handle mixing arrangement 10, the post processing carrier 30 as one kind positioned at the upstream of engine exhaust post processing mixing arrangement 10 and be located at The selective catalytic reducing agent (SCR) 40 in the downstream of the engine exhaust post processing mixing arrangement 10.
The engine exhaust post processing mixing arrangement 10 includes housing 1, the ribbon mixer being installed in the housing 1 2 and to further increase urea droplets evaporation and pyrolysis fine fibre element 3.
In illustrative embodiments of the present invention, the housing 1 is cylindrical, and it is provided with what is protruded to outside the housing 1 Lug boss 11 and the mounting seat 12 for being formed or being fixed on the lug boss 11.The mounting seat 12 is to install urea spray Mouth (not shown), to post-process the urea droplets of jet atomization in mixing arrangement 10 to the engine exhaust.
The ribbon mixer 2 by exhaust to be directed to helical airflow to be mixed with the urea droplets. In illustrative embodiments of the present invention, the ribbon mixer 2 includes central shaft 21 and stretched out from the central shaft 21 Helical blade 22 out.The two ends of the central shaft 21 are closings.The central shaft 21 is solid.The thread mixing Device 2 is fixed in the housing 1, and the helical blade 22 is provided with some perforation 221.
In illustrative embodiments of the present invention, the fine fibre element 3 is steel wool or foam metal.It is described to start Support 4 of the machine exhaust aftertreatment mixing arrangement 10 provided with the fixed fine fibre element 3.The support 4 is included positioned at described thin First sieve-like support 41 of the side of fibre element 3 and the second sieve-like support 42 positioned at the opposite side of fine fibre element 3.When So in other embodiments, the fine fibre element 3 can also be porous material of meshy steel wire or ceramics etc..
The present invention using fine fibre element 3 (such as steel wool) 3D loose structures or multiple-void structure, exhaust and The urea droplets pass through the fine fibre element 3, make urea droplets the surface of steel wool and it is internal occur it is sufficiently broken and Mixing.In addition, the line footpath of steel wool is smaller, space is complicated, and specific surface area is big.Because specific surface area is big, in limited space Bigger heat exchange area can be createed, is conducive to urea droplets to occur relatively sufficiently heat exchange with exhaust, so that beneficial to urea solution The evaporation and pyrolysis of drop, improve Crystallization.It can correspondingly be adjusted by the regulation of the density to fine fibre element 3 and be The back pressure of system.
Compared to structures such as antipriming pipe of the prior art and fins, the line footpath of fine fibre element 3 of the invention is all very Small (being, for example, less than 1mm), therefore the appearance of lee face can be avoided, so as to reduce urea crystals risk.This of the present invention is opened The problem of invention of opening up property both solves low regime, the problem of solving heat exchange again, with prominent substantive distinguishing features and significantly Progress.
In addition, above example is merely to illustrate the present invention and not limits technical scheme described in the invention, to this The understanding of specification should be based on person of ordinary skill in the field, although this specification is with reference to the above embodiments pair Present invention has been detailed description, still, it will be understood by those within the art that, the technology of art Personnel still can modify or equivalent substitution to the present invention, and all do not depart from the technology of the spirit and scope of the present invention Scheme and its improvement, all should cover in scope of the presently claimed invention.

Claims (10)

1. a kind of engine exhaust post-processes mixing arrangement, it includes ribbon mixer and the installation to install urea nozzle Seat, the urea nozzle is used to the urea droplets that jet atomization in mixing arrangement is post-processed to the engine exhaust, the spiral shell Blender is revolved exhaust is directed into helical airflow to be mixed with the urea droplets, it is characterised in that：The hair Motivation exhaust aftertreatment mixing arrangement also includes the fine fibre member for being located at the downstream of the ribbon mixer along flow direction of exhaust gases Part, wherein the fine fibre element with for it is described exhaust and the urea droplets pass through, further to increase the urea The broken and evaporation of drop.
2. engine exhaust as claimed in claim 1 post-processes mixing arrangement, it is characterised in that：Locate after the engine exhaust Managing mixing arrangement includes housing, and the mounting seat is formed or is fixed on the housing；The ribbon mixer includes center Axle and the helical blade extended outward from the central shaft.
3. engine exhaust as claimed in claim 2 post-processes mixing arrangement, it is characterised in that：The two ends of the central shaft are Closing.
4. engine exhaust as claimed in claim 3 post-processes mixing arrangement, it is characterised in that：The central shaft is solid 's.
5. engine exhaust as claimed in claim 2 post-processes mixing arrangement, it is characterised in that：The ribbon mixer is fixed In the housing, the helical blade is provided with some perforation.
6. engine exhaust as claimed in claim 1 post-processes mixing arrangement, it is characterised in that：The fine fibre element is steel Velvet or foam metal.
7. engine exhaust as claimed in claim 6 post-processes mixing arrangement, it is characterised in that：Locate after the engine exhaust Manage support of the mixing arrangement provided with the fixed fine fibre element.
8. engine exhaust as claimed in claim 7 post-processes mixing arrangement, it is characterised in that：The support includes being located at institute State the first sieve-like support and the second sieve-like support positioned at the fine fibre element opposite side of fine fibre element side.
9. a kind of application of fine fibre element in engine exhaust post-processes mixing arrangement, it is characterised in that the engine Exhaust aftertreatment mixing arrangement is the engine exhaust post processing mixing arrangement described in any one in claim 1 to 8.
10. a kind of exhaust post-treatment apparatus of engine, it includes the engine as described in any one in claim 1 to 8 Exhaust aftertreatment mixing arrangement and the SCR positioned at the downstream of engine exhaust post processing mixing arrangement Agent (SCR).
CN201710624811.2A 2017-07-27 2017-07-27 Engine exhaust post-processes mixing arrangement and its after-treatment device and application Withdrawn CN107165705A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201710624811.2A CN107165705A (en) 2017-07-27 2017-07-27 Engine exhaust post-processes mixing arrangement and its after-treatment device and application
PCT/CN2018/084375 WO2019019725A1 (en) 2017-07-27 2018-04-25 Engine exhaust after-treatment mixing device, after-treatment device comprising same, and application thereof

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Application Number Priority Date Filing Date Title
CN201710624811.2A CN107165705A (en) 2017-07-27 2017-07-27 Engine exhaust post-processes mixing arrangement and its after-treatment device and application

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Publication Number Publication Date
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Cited By (4)

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CN108468584A (en) * 2018-05-04 2018-08-31 博格思众智能装备（昆山）有限公司 It is atomized mixing tube and cleaning device of tail gas of diesel vehicle
CN108625957A (en) * 2018-07-03 2018-10-09 天纳克（苏州）排放系统有限公司 Engine exhaust post-processes mixing arrangement and its manufacturing method
CN108625956A (en) * 2018-07-03 2018-10-09 天纳克（苏州）排放系统有限公司 Engine exhaust post-processes mixing arrangement and its after-treatment device and application
WO2019019725A1 (en) * 2017-07-27 2019-01-31 天纳克（苏州）排放系统有限公司 Engine exhaust after-treatment mixing device, after-treatment device comprising same, and application thereof

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US11208934B2 (en) * 2019-02-25 2021-12-28 Cummins Emission Solutions Inc. Systems and methods for mixing exhaust gas and reductant

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CN207178007U (en) * 2017-07-27 2018-04-03 天纳克（苏州）排放系统有限公司 Engine exhaust post-processes mixing arrangement and its after-treatment device

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CN101288827A (en) * 2007-04-16 2008-10-22 通用汽车环球科技运作公司 Mixing device for discharge post-treatment system
CN102345488A (en) * 2011-09-14 2012-02-08 中国第一汽车股份有限公司 Mixed unit of foam metal ball pipe assembly
JP2015110928A (en) * 2013-12-06 2015-06-18 株式会社日本自動車部品総合研究所 Exhaust emission control system
WO2016046737A1 (en) * 2014-09-23 2016-03-31 Officine Metallurgiche G. Cornaglia S.P.A. Exhaust gas reduction unit for internal combustion engine
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Publication number Priority date Publication date Assignee Title
WO2019019725A1 (en) * 2017-07-27 2019-01-31 天纳克（苏州）排放系统有限公司 Engine exhaust after-treatment mixing device, after-treatment device comprising same, and application thereof
CN108468584A (en) * 2018-05-04 2018-08-31 博格思众智能装备（昆山）有限公司 It is atomized mixing tube and cleaning device of tail gas of diesel vehicle
CN108625957A (en) * 2018-07-03 2018-10-09 天纳克（苏州）排放系统有限公司 Engine exhaust post-processes mixing arrangement and its manufacturing method
CN108625956A (en) * 2018-07-03 2018-10-09 天纳克（苏州）排放系统有限公司 Engine exhaust post-processes mixing arrangement and its after-treatment device and application

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Application publication date: 20170915