CN108425724B - Tail-gas after treatment apparatus - Google Patents
Tail-gas after treatment apparatus Download PDFInfo
- 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.)
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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
- 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
- F01N2610/02—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
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- 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
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
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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201810245476.XA CN108425724B (en) | 2016-04-11 | 2016-04-11 | Tail-gas after treatment apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201610222131.3A Division CN105673150B (en) | 2016-04-11 | 2016-04-11 | Tail-gas after treatment apparatus |
Publications (2)
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CN108425724A CN108425724A (en) | 2018-08-21 |
CN108425724B true CN108425724B (en) | 2019-07-23 |
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CN201610222131.3A Active CN105673150B (en) | 2016-04-11 | 2016-04-11 | Tail-gas after treatment apparatus |
CN201810245476.XA Active CN108425724B (en) | 2016-04-11 | 2016-04-11 | Tail-gas after treatment apparatus |
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CN201610222131.3A Active CN105673150B (en) | 2016-04-11 | 2016-04-11 | Tail-gas after treatment apparatus |
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Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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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EP2671630A1 (en) * | 2012-06-07 | 2013-12-11 | General Electric Company | Mixing device having a plurality of mixing channels |
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Also Published As
Publication number | Publication date |
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CN108425724A (en) | 2018-08-21 |
CN105673150A (en) | 2016-06-15 |
CN105673150B (en) | 2018-06-29 |
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