CN108425724B - Tail-gas after treatment apparatus - Google Patents

Tail-gas after treatment apparatus Download PDF

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Publication number
CN108425724B
CN108425724B CN201810245476.XA CN201810245476A CN108425724B CN 108425724 B CN108425724 B CN 108425724B CN 201810245476 A CN201810245476 A CN 201810245476A CN 108425724 B CN108425724 B CN 108425724B
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CN
China
Prior art keywords
cavity
mixing tube
bowl
plate
tail
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.)
Active
Application number
CN201810245476.XA
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Chinese (zh)
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CN108425724A (en
Inventor
郑祥
殷雷
王林
曹刚
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 CN201810245476.XA priority Critical patent/CN108425724B/en
Publication of CN108425724A publication Critical patent/CN108425724A/en
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Publication of CN108425724B publication Critical patent/CN108425724B/en
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Classifications

    • 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
    • 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
    • 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
    • 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
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/02Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • 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
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1486Means to prevent the substance from freezing

Abstract

A kind of tail-gas after treatment apparatus, it includes shell and is installed on the intracorporal mixer assembly of the shell, the shell is equipped with to install urea nozzle to spray the mounting base of urea into the mixer assembly, the mixer assembly includes mixing tube, positioned at the bowl cover for mixing bottom of the tube and the partition matched with the mixing tube, the mixing tube includes the air stream outlet positioned at the air flow inlet of upper end and positioned at lower end, the shell is separated into the first cavity and the second cavity by the partition, wherein first cavity is connected to the air flow inlet, second cavity is connected to the air stream outlet, the mixing tube includes several spinning disks at the air flow inlet, the spinning disk protrudes into first cavity, the bowl cover is for double-layer structure and to force flow reversal.So set, increase Urea Evaporation away from discrete time, improve the uniformity of air-flow mixing.

Description

Tail-gas after treatment apparatus
The application be the applying date be on April 11st, 2016, application No. is 201610222131.3, entitled " tail gas The divisional application of the application for a patent for invention of after-treatment device ".
Technical field
The present invention relates to a kind of tail-gas after treatment apparatus, belong to motor exhaust post-processing technology field.
Background technique
Research shows that ammonia distribution in exhaust gas aftertreatment system (such as selective catalytic reduction system operating, SCR system) pipeline Uniformity coefficient has important influence to the overall performance and endurance quality of system.If ammonia, which is unevenly distributed, will lead to regional area Ammonia causes oxynitrides (NOx) transformation efficiency too low excessively to easily cause NH_3 leakage in other ammonia thin areas.It is long The uneven distribution of time ammonia will lead to that catalyst aging is uneven, to influence the overall performance of catalyst.In addition, urea solution The uneven distribution of drop will cause local tube wall or mixed structure temperature is too low, forms crystallization, exhaust pipe can be blocked when serious, is led Cause engine power performance decline.
Therefore, it is necessary to provide a kind of novel tail-gas after treatment apparatus, to solve the above technical problems.
Summary of the invention
The purpose of the present invention is to provide a kind of uniformly mixed tail-gas after treatment apparatus.
To achieve the above object, the present invention adopts the following technical scheme: a kind of tail-gas after treatment apparatus comprising shell with And it is installed on the intracorporal mixer assembly of the shell, the shell is equipped with to install urea nozzle with to the mixer assembly The mounting base of middle injection urea, it is characterised in that: the mixer assembly includes mixing tube, positioned at the bowl of the mixing bottom of the tube Lid and the partition matched with the mixing tube, the mixing tube include positioned at the air flow inlet of upper end and positioned at lower end The shell is separated into the first cavity and the second cavity by air stream outlet, the partition, wherein first cavity with it is described Air flow inlet connection, second cavity are connected to the air stream outlet, and the mixing tube includes being located at the air flow inlet Several spinning disks, the spinning disk protrudes into first cavity, and the bowl cover is to force flow reversal;It is described The lower end of mixing tube extends at least partially into the bowl cover, and the bowl cover has the first arc-shaped inner surface to force air-flow Reverse flow;The bowl cover be double-layer structure comprising interior bowl, outer bowl and between the interior bowl and said outer bowl every Sheaf space, first inner surface are located on the interior bowl, and the jacket space is connected to second cavity, the mixer Component further includes at least one connecting tube for being connected to the jacket space Yu first cavity.
Technical solution as a further improvement of that present invention, the partition include the first plate positioned at the mixing tube side The third plate of piece, the second plate positioned at the mixing tube other side and connection first plate and second plate Piece, the third plate are equipped with the through-hole passed through for the mixing tube.
Technical solution as a further improvement of that present invention, the mixing tube are arranged vertically;First plate with it is described Second plate extends vertically and extending direction is on the contrary, the third plate horizontal extension.
Technical solution as a further improvement of that present invention, the partition is substantially Z-shape, and first plate is located at described The lower left of mixing tube, second plate are located at the upper right side of the mixing tube;The mixing tube includes being located at the eddy flow Several the first of the top of piece are perforated and several second perforation positioned at the lower part of the spinning disk, first perforation and institute The second perforation is stated to be connected with first cavity.
Technical solution as a further improvement of that present invention, the both ends of the connecting tube are separately fixed at said outer bowl and institute It states on partition.
Technical solution as a further improvement of that present invention, the mixer assembly further include be located at the interior bowl with it is described Cover board between outer bowl and the interlayer board between the interior bowl and said outer bowl, wherein the cover board is equipped with and described the The jacket space is divided into upper space and lower space, the top by the opening of two cavitys connection, the interlayer board Space and the open communication, said outer bowl are equipped with the aperture being connected to the lower space.
Technical solution as a further improvement of that present invention, the connecting tube include being connected to the upper space and described the First connecting tube of one cavity and the second connecting tube of the connection lower space and first cavity, first connection Pipe runs through the partition with second connecting tube.
Compared to the prior art, shell is separated into the first cavity and the second cavity by setting partition by the present invention, bright The really guiding of air-flow.In addition, force flow reversal by bowl cover, increase Urea Evaporation away from discrete time, improve The uniformity of air-flow mixing.
Detailed description of the invention
Fig. 1 is the stereoscopic schematic diagram of tail-gas after treatment apparatus of the present invention.
Fig. 2 is the stereoscopic schematic diagram of another angle of Fig. 1.
Fig. 3 is the stereogram exploded view of Fig. 1.
Fig. 4 is the stereogram exploded view removed in Fig. 3 after carrier module.
Fig. 5 is the stereoscopic schematic diagram of mixer assembly in Fig. 4.
Fig. 6 is the stereoscopic schematic diagram of another angle of Fig. 5.
Fig. 7 is the stereogram exploded view of Fig. 5.
Fig. 8 is the diagrammatic cross-section of the line A-A along Fig. 1.
Specific embodiment
It please join shown in Fig. 1 to Fig. 8, present invention discloses a kind of tail-gas after treatment apparatus 100, to handle engine (example Such as high-power engine) tail gas.On the whole, the tail-gas after treatment apparatus 100 includes electric hybrid module 200 and is located at described The carrier module 300 in 200 downstream of electric hybrid module.It please join shown in Fig. 8, the carrier module described in illustrative embodiments of the present invention 300 include selective oxidation catalytic module (SCR) 301 and NH_3 leakage photocatalyst module (ASC) 302.The electric hybrid module 200 If being connected with the carrier module 300 by bolt stem 400.
The electric hybrid module 200 includes shell 1 and the mixer assembly 2 being installed in the shell 1.Wherein, described Shell 1 is equipped with to install urea nozzle (not shown) to spray the mounting base 10 of urea into the mixer assembly 2.
The mixer assembly 2 include arrange vertically mixing tube 21, positioned at 21 bottom of mixing tube bowl cover 22 with And the partition 23 matched with the mixing tube 21.It please join shown in Fig. 5 to Fig. 7, it is described in illustrative embodiments of the present invention Mixing tube 21 includes the air stream outlet 212 positioned at the air flow inlet 211 of upper end and positioned at lower end.In addition, the mixing tube 21 Including being located at several spinning disks 213 at the air flow inlet 211, wearing positioned at several the first of the top of the spinning disk 213 Hole 214 and positioned at the lower part of the spinning disk 213 it is several second perforation 215.The mixing tube 21 arranged vertically can be saved The length of tail-gas after treatment apparatus 100 is suitble to apply in narrow space.
The shell 1 is separated into the first cavity 11 and the second cavity 12 by the partition 23, wherein first cavity 11 are connected to the air flow inlet 211, and second cavity 12 is connected to the air stream outlet 212, and the spinning disk 213 protrudes out Enter in first cavity 11, first perforation 214 is connected with first cavity 11 with second perforation 215. In illustrative embodiments of the present invention, the partition 23 is substantially Z-shape comprising positioned at the first of 21 side of mixing tube Plate 231, the second plate 232 positioned at 21 other side of mixing tube and connection first plate 231 and described second The third plate 233 of plate 232.First plate 231 is located at the lower left of the mixing tube 21, second plate 232 Positioned at the upper right side of the mixing tube 21.First plate 231 extends vertically with second plate 232 and extending direction On the contrary, 233 horizontal extension of third plate.The third plate 233 is equipped with the through-hole 234 passed through for the mixing tube 21.
It please join shown in Fig. 8, the lower end of the mixing tube 21 extends at least partially into the bowl cover 22, and the bowl cover 22 has There is the first arc-shaped inner surface 220 to force flow reversal.In illustrative embodiments of the present invention, the bowl cover 22 For double-layer structure comprising interior bowl 24, the jacket space 26 between the interior bowl 24 and said outer bowl 25, is incited somebody to action at outer bowl 25 The mixing tube 21 is fixed to the bracket 27 in the bowl cover 22, the cover board 28 between the interior bowl 24 and said outer bowl 25 And the interlayer board 29 between the interior bowl 24 and said outer bowl 25.
The mixing tube 21 passes through the bracket 27, and the bracket 27 is fixed in the bowl cover 22.It please join figure Fig. 5 and figure Shown in 7, the bracket 27 is equipped with the hollow-out parts 271 being connected to second cavity 12.First inner surface 220 is located at described On interior bowl 24.
The jacket space 26 is connected to second cavity 12.The jacket space 26 is divided by the interlayer board 29 Upper space 261 and lower space 262, the cover board 28 are equipped with the opening 281 being connected to second cavity 12, and described Upper space 261 is connected to the opening 281, and said outer bowl 25 is equipped with the aperture 251 being connected to the lower space 262.
The mixer assembly 2 further includes being connected to the jacket space 26 to connect at least one of first cavity 11 Pipe.In illustrative embodiments of the present invention, the connecting tube includes being connected to the upper space 261 and first cavity 11 The first connecting tube 31 and the connection lower space 262 and first cavity 11 the second connecting tube 32.Described first Connecting tube 31 and second connecting tube 32 run through the partition 23.Specifically, first connecting tube 31 and described second The both ends of connecting tube 32 are separately fixed on said outer bowl 25 and the partition 23.In addition, in order to preferably control the stream of air-flow Dynamic, the mixer assembly 2 further includes the spacing block 263 in the upper space 261.
When the exhaust of engine enters the first cavity 11 from the entrance 13 of the shell 1, most exhausts is in partition Flow 213 of spinning under 23 guidance enters in mixing tube 21.When meeting injection conditions, urea nozzle is sprayed into mixing tube 21 Urea, the urea droplets of atomization and the exhaust of engine are mixed together and flow downward.Then, it is forced under the action of bowl cover 22 Reversed (such as upward) flowing of air-flow.Air-flow after reversed passes through hollow-out parts 271 and enters the second cavity 12, enters back into vehicle group Part 300.So set, increase Urea Evaporation away from discrete time, improve the uniformity of air-flow mixing.In addition, pass through by The exhaust of engine in the first cavity 11 introduces upper space from the first connecting tube 31 and the second connecting tube 32 respectively 261 and lower space 262, and enter the second cavity 12 from opening 281 and aperture 251 respectively, it realizes to bowl cover 22 Heating, to reduce the risk of urea crystals.
In addition, above embodiments are merely to illustrate the present invention and not limit the technical scheme described by the invention, to this The understanding of specification should be based on person of ordinary skill in the field, although this specification is referring to the above embodiments pair Present invention has been detailed description, still, those skilled in the art should understand that, the technology of technical field Personnel still can modify or equivalently replace the present invention, and all do not depart from the technology of the spirit and scope of the present invention Scheme and its improvement should all be covered in scope of the presently claimed invention.

Claims (7)

1. a kind of tail-gas after treatment apparatus comprising shell and be installed on the intracorporal mixer assembly of the shell, the shell Equipped with to install urea nozzle to spray the mounting base of urea into the mixer assembly, it is characterised in that: the mixing Device assembly includes mixing tube, positioned at the bowl cover for mixing bottom of the tube and the partition matched with the mixing tube, described mixed Closing pipe includes the air stream outlet positioned at the air flow inlet of upper end and positioned at lower end, and the shell is separated into first by the partition Cavity and the second cavity, wherein first cavity is connected to the air flow inlet, second cavity goes out with the air-flow Mouth connection, the mixing tube include several spinning disks at the air flow inlet, and the spinning disk protrudes into described first In cavity, the bowl cover is to force flow reversal;The lower end of the mixing tube extends at least partially into the bowl cover, The bowl cover has the first arc-shaped inner surface to force flow reversal;The bowl cover is double-layer structure comprising interior Bowl, outer bowl and the jacket space between the interior bowl and said outer bowl, first inner surface are located on the interior bowl, The jacket space is connected to second cavity, and the mixer assembly further includes being connected to the jacket space and described first At least one connecting tube of cavity.
2. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the partition includes being located at the mixing tube one First plate of side, the second plate positioned at the mixing tube other side and connection first plate and second plate The third plate of piece, the third plate are equipped with the through-hole passed through for the mixing tube.
3. tail-gas after treatment apparatus as claimed in claim 2, it is characterised in that: the mixing tube is arranged vertically;Described first Plate extends vertically with second plate and extending direction is on the contrary, the third plate horizontal extension.
4. tail-gas after treatment apparatus as claimed in claim 3, it is characterised in that: the partition is substantially Z-shape, first plate Piece is located at the lower left of the mixing tube, and second plate is located at the upper right side of the mixing tube;The mixing tube includes position Several first perforation in the top of the spinning disk and several second perforation positioned at the lower part of the spinning disk, described the One perforation is connected with first cavity with second perforation.
5. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the both ends of the connecting tube are separately fixed at institute It states on outer bowl and the partition.
6. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the mixer assembly further includes positioned at described Cover board between interior bowl and said outer bowl and the interlayer board between the interior bowl and said outer bowl, wherein the cover board is set There is the opening being connected to second cavity, the jacket space is divided into upper space to the interlayer board and lower part is empty Between, the upper space and the open communication, said outer bowl are equipped with the aperture being connected to the lower space.
7. tail-gas after treatment apparatus as claimed in claim 6, it is characterised in that: the connecting tube includes being connected to the top sky Between with the first connecting tube of first cavity and be connected to the second connecting tube of the lower space Yu first cavity, institute It states the first connecting tube and second connecting tube runs through the partition.
CN201810245476.XA 2016-04-11 2016-04-11 Tail-gas after treatment apparatus Active CN108425724B (en)

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Application Number Priority Date Filing Date Title
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Applications Claiming Priority (2)

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CN201610222131.3A CN105673150B (en) 2016-04-11 2016-04-11 Tail-gas after treatment apparatus
CN201810245476.XA CN108425724B (en) 2016-04-11 2016-04-11 Tail-gas after treatment apparatus

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Families Citing this family (10)

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CN205779158U (en) * 2016-07-08 2016-12-07 天纳克(苏州)排放系统有限公司 Tail-gas after treatment apparatus
CN106246303B (en) * 2016-10-12 2019-01-15 天纳克(苏州)排放系统有限公司 Tail-gas after treatment apparatus
CN106523092B (en) * 2016-10-24 2019-04-23 无锡威孚力达催化净化器有限责任公司 The conical surface type eddy flow urea mixing devices of page two
CN106437967B (en) * 2016-10-24 2019-03-19 无锡威孚力达催化净化器有限责任公司 Honeycomb type eddy flow urea mixing device
CN106523091B (en) * 2016-10-24 2019-04-23 无锡威孚力达催化净化器有限责任公司 Page window type eddy flow urea mixing device
CN106437968B (en) * 2016-10-24 2019-06-28 无锡威孚力达催化净化器有限责任公司 Integrated wave eddy flow urea mixing device
CN107178412B (en) * 2017-06-29 2023-09-05 杭州银轮科技有限公司 Side-feeding cylinder type SCR packaging air inlet end assembly
CN107165704A (en) * 2017-07-27 2017-09-15 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
CN109184870B (en) * 2018-11-06 2023-11-03 武汉洛特福动力技术有限公司 Device and method for mixing reactant and gas flow
EP3760846A1 (en) 2019-07-04 2021-01-06 Donaldson Company, Inc. System for mixing a liquid spray into a gaseous flow and exhaust aftertreatment device comprising same

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