CN106246303B - Tail-gas after treatment apparatus - Google Patents
Tail-gas after treatment apparatus Download PDFInfo
- Publication number
- CN106246303B CN106246303B CN201610888496.XA CN201610888496A CN106246303B CN 106246303 B CN106246303 B CN 106246303B CN 201610888496 A CN201610888496 A CN 201610888496A CN 106246303 B CN106246303 B CN 106246303B
- Authority
- CN
- China
- Prior art keywords
- tail
- gas
- treatment apparatus
- exhaust gas
- mixing tube
- 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
- 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 comprising shell, mixer assembly and post-processing carrier.The shell is equipped with tail gas inlet channel and the mounting base to install urea nozzle.The urea nozzle is equipped with the spray-hole positioned at its end.The tail-gas after treatment apparatus is additionally provided with exhaust gas guide portion and at least partially about the baffle in the periphery of the spray-hole, and the exhaust gas guide portion is equipped with the exhaust gas guide channel being connected with the tail gas inlet channel.It is arranged such, on the one hand, improve the temperature near spray-hole, reduce the risk of urea crystals；On the other hand, soon the urea droplets ejected can be taken away since baffle is formed by eddy flow, dead zone is avoided, to also reduce the risk of urea crystals.
Description
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 tail-gas after treatment apparatus that can reduce urea crystals risk.
To achieve the above object, the present invention adopts the following technical scheme:
Technical solution as a further improvement of that present invention, a kind of tail-gas after treatment apparatus comprising shell is mounted on institute
State the intracorporal mixer assembly of shell and the post-processing carrier positioned at the downstream of the mixer assembly；The shell is equipped with tail gas
Inlet channel and the mounting base to install urea nozzle, the urea nozzle are equipped with positioned at its end and to mix to described
The spray-hole of urea droplets is sprayed in clutch component；The tail-gas after treatment apparatus be additionally provided with exhaust gas guide portion and with the tail
Gas guidance part matches and at least partially about the baffle in the periphery of the spray-hole, wherein the baffle is close to the injection
Hole, the exhaust gas guide portion are equipped with the exhaust gas guide channel being connected with the tail gas inlet channel.
Technical solution as a further improvement of that present invention, the mixer assembly include mixing tube, and the mixing tube is set
There are the mixing chamber being connected with the tail gas inlet channel and tail gas and/or tail gas and urine the mixing chamber will be entered
The mixed airflow of plain drop forms several spinning disks of vortex flow.
Technical solution as a further improvement of that present invention, the baffle is in arc-shaped and is located in the mixing chamber, institute
It states exhaust gas guide channel and enters the inner surface of the baffle along a tangential direction to form eddy flow on the internal surface.
Technical solution as a further improvement of that present invention, the baffle is C-shaped or O shape or spiral shape.
Technical solution as a further improvement of that present invention, the mixing tube is cylindrical, and the spinning disk is to rush outward
It presses the mixing tube and is formed, the spinning disk is distributed on the outer circumference surface of the mixing tube；The mixing tube be equipped with
The spinning disk is open correspondingly, and the mixing chamber is connected to by the opening with the tail gas inlet channel.
Technical solution as a further improvement of that present invention, the mixing tube are equipped with close to the mounting base and are distributed in institute
Several apertures on outer circumference surface are stated, the aperture is located at the mounting base and the rotation on the axis direction of the mixing tube
Between flow.
Technical solution as a further improvement of that present invention, the shell are equipped with and are welded on one end of the mixing tube
Cover board, the mounting base are welded on the side of the cover board, and the baffle and/or the exhaust gas guide portion are welded on the cover board
The other side.
Technical solution as a further improvement of that present invention, the exhaust gas guide portion is fixed on the mixing tube, described
Exhaust gas guide channel is equipped with the exhaust gas guide mouth being exposed on the mixing tube.
Technical solution as a further improvement of that present invention, the mixer assembly, which is equipped with, is located at the mixing bottom of the tube
Bowl cover and the Z-shaped partition matched with the mixing tube, wherein the mixing tube includes the air stream outlet positioned at lower end, it is described
The shell is separated into the first cavity and the second cavity by partition, wherein first cavity is connected to the mixing chamber, institute
It states the second cavity to be connected to the air stream outlet, the bowl cover is to force flow reversal.
Technical solution as a further improvement of that present invention, the mixer assembly are equipped with discoid mounting portion and convex
The mounting portion and several spoilers extended to the post-processing carrier out.
Compared to the prior art, the present invention at least can directly be drawn small part tail gas by setting exhaust gas guide channel
Eddy flow is formed to spray-hole, and under the action of baffle.It is arranged such, on the one hand, improve the temperature near spray-hole
Degree, reduces the risk of urea crystals；On the other hand, since baffle is formed by the urine that eddy flow will can be ejected soon
Plain drop is taken away, and dead zone is avoided, to also reduce the risk of urea crystals.
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 part isometric exploded view of Fig. 1.
Fig. 3 is the further stereogram exploded view of Fig. 2.
Fig. 4 is the stereoscopic schematic diagram in the exhaust gas guide portion and baffle in Fig. 3.
Fig. 5 is the stereoscopic schematic diagram of mixer assembly in Fig. 2.
Fig. 6 is the part isometric exploded view of Fig. 5.
Fig. 7 is the part isometric exploded view of another angle of Fig. 6.
Fig. 8 is the partial enlarged view of circled portion in Fig. 5.
Fig. 9 is mixer assembly in the part isometric exploded view of another embodiment, and wherein the structure of baffle slightly has with Fig. 6
It is different.
Figure 10 is the part isometric exploded view of another angle of Fig. 9.
Figure 11 is the diagrammatic cross-section of the line A-A along Fig. 1.
Figure 12 is diagrammatic cross-section of the tail-gas after treatment apparatus of the present invention in another embodiment.
Specific embodiment
It please join shown in Fig. 1 to Figure 11, present invention discloses a kind of tail-gas after treatment apparatus 100, to handle diesel engine
The tail gas of machine comprising shell 1, the mixer assembly 2 being mounted in the shell 1, positioned at the downstream of the mixer assembly 2
Post-processing carrier 3 and anti-urea crystals structure 4.It please join shown in Figure 11, in illustrative embodiments of the present invention, after described
Handling carrier 3 includes selective catalytic reducing agent (SCR) 31 and NH_3 leakage catalyst converter (ASC) 32.
The shell 1 is equipped with tail gas inlet channel 11, the mounting base 12 to install urea nozzle 5 and to weld
State the cover board 13 of mounting base 12.The urea nozzle 5 is equipped with positioned at its end and to spray urine into the mixer assembly 2
The spray-hole 51 of plain drop.
In one embodiment of the invention, the mixer assembly 2 includes mixing tube 21, is located at the mixing tube 21
The bowl cover 22 of bottom and the Z-shaped partition 23 matched with the mixing tube 21.
In illustrative embodiments of the present invention, the mixing tube 21 is cylindrical, is equipped with logical with the tail gas air inlet
Mixing chamber 211 and tail gas and/or tail gas the mixing chamber 211 will be entered that road 11 is connected and urea droplets it is mixed
Close several spinning disks 212 that air-flow forms vortex flow.So set, can be improved the mixing distance of tail gas and urea droplets, change
Kind mixed effect.The spinning disk 212 is mixing tube 21 described in outside punching press and is formed that the spinning disk 212 is distributed in institute
On the outer circumference surface for stating mixing tube 21.The mixing tube 21 be equipped with the opening 213 correspondingly of the spinning disk 212, it is described
The mixing chamber 211 is connected to by opening 213 with the tail gas inlet channel 11.In addition, the mixing tube 21 is equipped with close
The mounting base 12 and several apertures 214 on the outer circumference surface are distributed in, axis of the aperture 214 in the mixing tube 21
On line direction between the mounting base 12 and the spinning disk 212.The aperture 214 can allow partial tail gas to pass through, and one
Aspect improves the temperature near urea nozzle 5, reduces the risk of urea crystals；On the other hand, facilitate to eject
Urea droplets take away, to also reduce the risk of urea crystals.The mixing tube 21 further includes that the air-flow positioned at lower end goes out
Mouth 215(joins Figure 11).
The shell 1 is separated into the first cavity 231 and the second cavity 232 by the partition 23, wherein first chamber
Body 231 is connected to the mixing chamber 211, and second cavity 232 is connected to the air stream outlet 215.The bowl cover 22 to
Force flow reversal, increase Urea Evaporation away from discrete time, improve the uniformity of air-flow mixing.
It please join shown in Fig. 4, the anti-urea crystals structure 4 one whistle of picture in illustrative embodiments of the present invention,
It is matched including exhaust gas guide portion 41 and with the exhaust gas guide portion 41 and at least partially about in the outer of the spray-hole 51
The baffle 42 enclosed, wherein the baffle 42, close to the spray-hole 51, the exhaust gas guide portion 41 is equipped with and the tail gas air inlet
The exhaust gas guide channel 411 that channel 11 is connected.Preferably, the baffle 42 in arc-shaped and is located in the mixing chamber 211.
The exhaust gas guide channel 411 enters the inner surface of the baffle 42 along a tangential direction to form eddy flow on the internal surface.
It is arranged such, on the one hand, improve the temperature near spray-hole 51, reduce the risk of urea crystals；On the other hand, due to gear
Piece 42 is formed by eddy flow and can soon take away the urea droplets ejected, avoids dead zone, to also reduce urine
The risk of element crystallization.The exhaust gas guide portion 41 can be one or more.
It please join shown in Fig. 4, in one embodiment of the invention, the baffle 42 is in O shape.It please join Fig. 9 and Figure 10 institute
Show, in another embodiment of the invention, the baffle 42 is C-shaped.Certainly, the baffle 42 can also be spiral shape etc.
All various shapes for being easily formed eddy flow.In other embodiments, the baffle can also be with the other shapes such as V-shaped.
The cover board 13 is welded on one end of the mixing tube 21 (such as upper end).The mounting base 12 is welded on described
The side (such as upside) of cover board 13, the baffle 42 and/or the exhaust gas guide portion 41 are welded on the another of the cover board 13
Side (such as downside).In illustrative embodiments of the present invention, the exhaust gas guide portion 41 is fixed on the mixing tube 21.Institute
It states exhaust gas guide channel 411 and is equipped with the exhaust gas guide mouth being exposed on the mixing tube 21.
It please join shown in Figure 12, aforementioned anti-urea crystals structure 4 can also be applied in tail-gas after treatment apparatus 100 of the present invention
In another embodiment.In both embodiments, identical number designation represents same or similar element.It can manage
It solves, the framework of the tail-gas after treatment apparatus 100 in tail-gas after treatment apparatus 100 and first embodiment in second embodiment
Difference, wherein in this second embodiment, mixer assembly 2 is equipped with discoid mounting portion 24 and the protrusion mounting portion 24
And several spoilers 25 extended to the post-processing carrier 3.The spoiler 25 can be improved atomization after urea droplets with
The mixing uniformity of tail gas.
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 (8)
1. a kind of tail-gas after treatment apparatus comprising shell is mounted on the intracorporal mixer assembly of the shell and is located at described
The post-processing carrier in the downstream of mixer assembly；The shell is equipped with tail gas inlet channel and the peace to install urea nozzle
Seat is filled, the urea nozzle is equipped with positioned at its end and the spray-hole to spray urea droplets into the mixer assembly；
It is characterized by: the tail-gas after treatment apparatus is additionally provided with exhaust gas guide portion and matches with the exhaust gas guide portion and at least
The baffle in the periphery of the spray-hole is partially surrounded, wherein the baffle, close to the spray-hole, the exhaust gas guide portion is set
There is the exhaust gas guide channel being connected with the tail gas inlet channel；The mixer assembly includes mixing tube, the mixing tube
Equipped with the mixing chamber and the tail gas the mixing chamber will be entered that are connected with the tail gas inlet channel and/or tail gas with
The mixed airflow of urea droplets forms several spinning disks of vortex flow；The baffle is in arc-shaped and is located in the mixing chamber,
The exhaust gas guide channel enters the inner surface of the baffle along a tangential direction to form eddy flow on the internal surface.
2. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the baffle is C-shaped or O shape or spiral
Shape.
3. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the mixing tube is cylindrical, the eddy flow
Piece is mixing tube described in outside punching press and is formed that the spinning disk is distributed on the outer circumference surface of the mixing tube；It is described mixed
Pipe is closed equipped with being open correspondingly with the spinning disk, the mixing chamber is connected to by the opening with the tail gas inlet channel
Get up.
4. tail-gas after treatment apparatus as claimed in claim 3, it is characterised in that: the mixing tube is equipped with close to the mounting base
And several apertures on the outer circumference surface are distributed in, the aperture is located at the installation on the axis direction of the mixing tube
Between seat and the spinning disk.
5. tail-gas after treatment apparatus as claimed in claim 4, it is characterised in that: the shell is equipped with and is welded on the mixing tube
One end on cover board, the mounting base is welded on the side of the cover board, the baffle and/or exhaust gas guide portion welding
In the other side of the cover board.
6. tail-gas after treatment apparatus as claimed in claim 5, it is characterised in that: the exhaust gas guide portion is fixed on the mixing
Guan Shang, the exhaust gas guide channel are equipped with the exhaust gas guide mouth being exposed on the mixing tube.
7. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the mixer assembly, which is equipped with, is located at described mix
The Z-shaped partition for closing the bowl cover of bottom of the tube and being matched with the mixing tube, wherein the mixing tube includes the gas positioned at lower end
The shell is separated into the first cavity and the second cavity by outflux, the partition, wherein first cavity is mixed with described
Chamber connection is closed, second cavity is connected to the air stream outlet, and the bowl cover is to force flow reversal.
8. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the mixer assembly is equipped with discoid peace
Dress portion and the protrusion mounting portion and several spoilers extended to the post-processing carrier.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888496.XA CN106246303B (en) | 2016-10-12 | 2016-10-12 | Tail-gas after treatment apparatus |
| PCT/CN2017/104330 WO2018068667A1 (en) | 2016-10-12 | 2017-09-29 | Tail gas after-treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888496.XA CN106246303B (en) | 2016-10-12 | 2016-10-12 | Tail-gas after treatment apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106246303A CN106246303A (en) | 2016-12-21 |
| CN106246303B true CN106246303B (en) | 2019-01-15 |
Family
ID=57611570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610888496.XA Active CN106246303B (en) | 2016-10-12 | 2016-10-12 | Tail-gas after treatment apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106246303B (en) |
| WO (1) | WO2018068667A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106640301A (en) * | 2017-02-22 | 2017-05-10 | 天纳克（苏州）排放系统有限公司 | Tail gas post-treatment device |
| CN109083722A (en) * | 2017-06-14 | 2018-12-25 | 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 |
| 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 |
| CN107575287B (en) * | 2017-09-19 | 2019-07-23 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment mixing arrangement |
| CN108194179A (en) * | 2018-03-14 | 2018-06-22 | 潍柴动力股份有限公司 | A kind of post processing air inlet mixing arrangement |
| CN108979803B (en) * | 2018-07-25 | 2023-07-25 | 武汉水草能源科技研发中心(有限合伙) | Method and device for mixing liquid and gas |
| CN109973185B (en) * | 2019-03-20 | 2021-01-12 | 苏州国方汽车电子有限公司 | Exhaust mixing structure for diesel engine tail gas aftertreatment |
| 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 |
| FI20215978A1 (en) * | 2021-09-16 | 2023-03-17 | Proventia Oy | Method in a flow device for exhaust gas aftertreatment and the flow device |
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| 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 |
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| CN202028346U (en) * | 2010-12-15 | 2011-11-09 | 杭州银轮科技有限公司 | Static mixer for urea selective catalytic reduction device of diesel engine |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2018068667A1 (en) | 2018-04-19 |
| CN106246303A (en) | 2016-12-21 |
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