CN108397262A - Light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe post-processes encapsulating structure - Google Patents
Light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe post-processes encapsulating structure Download PDFInfo
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- CN108397262A CN108397262A CN201810143591.6A CN201810143591A CN108397262A CN 108397262 A CN108397262 A CN 108397262A CN 201810143591 A CN201810143591 A CN 201810143591A CN 108397262 A CN108397262 A CN 108397262A
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- Prior art keywords
- eddy flow
- mixing chamber
- mix aperture
- end cap
- aperture pipe
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Classifications
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- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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- 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
- F01N3/101—Three-way catalysts
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- 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]
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- 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
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- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/10—Carbon or carbon oxides
-
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/12—Hydrocarbons
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- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Materials Engineering (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention belongs to exhaust gas from diesel vehicle post-processing technology fields, and in particular to a kind of light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe post-processing encapsulating structure, mixer apparatus includes mixing chamber cylinder, swirl vane pipe, partition board, Kong Guan, blanking cover and flange orifice plate；The swirl vane Guan Yukong pipes connect to form eddy flow mix aperture pipe, eddy flow mix aperture pipe is obliquely arranged across partition board in mixing chamber cylinder, blanking cover is arranged with flange orifice plate in the end of mixing chamber cylinder, the front end of mixing chamber cylinder is equipped with mixing chamber end cap, and urea nozzle is mounted on mixing chamber end cap.The present invention not only solves the problem of tight coupling portioned product arrangement space harshness, diesel emission particulate trap arranges distance farther out with selective catalytic reduction device simultaneously, so that arrangement form is more flexible, urea nozzle and novel mixer Integrated design, it is compact-sized, urea and air-flow good mixing effect, it is small to occur urea crystals risk.
Description
Technical field
The invention belongs to exhaust gas from diesel vehicle post-processing technology fields, and in particular to a kind of light-duty diesel vehicle oblique cutting eddy flow mixing
Hole pipe post-processes encapsulating structure.
Background technology
As state motor vehicle exhaust pollutant emission regulation demands are increasingly stringenter, new discharge standard is to tail gas pollution
Object has extremely stringent standard, only cannot meet harsh discharge standard with internal purification technology.To six stage of state, examine
Consider technology innovation upgrade cost, high-efficient selective catalytic reduction（SCR）Route is the mainstream technology road of domestic major main engine plants
Line also needs arrangement diesel engine oxygen in addition to needing to arrange the harmful nitrogen oxides ingredient of selective catalytic reduction converter SCR purifications
Change catalytic converter（DOC）And diesel emission particulate trap（DPF）The ingredients such as HC and soot particulate in purification exhaust.
On the light-duty diesel vehicle in six stage of state, for ensure diesel oxidation converter DOC can rapid ignition and
The reliable regeneration of carbon soot particles trap DPF, diesel oxidation converter DOC is generally using tight coupling arrangement, carbon soot particles
Followed by trap DPF, but the factors such as chassis boundary are limited to, selective catalytic reduction converter SCR generally requires to arrange
Apart from carbon soot particles trap DPF remotely.
Invention content
The object of the present invention is to provide an oblique cutting eddy flow mix aperture pipes to post-process encapsulating structure, can meet DOC and quickly rise
Combustion, dpf regeneration is reliable, urea nozzle, mixer and selective catalytic reduction converter SCR effective integrations, and ammonia is urged selectively
Change reduction converter SCR inlet end face be uniformly distributed and mixed structure urea crystals risk within the acceptable range.
Examination Scheme according to the present invention, the light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe post-process encapsulating structure, packet
Include air inlet pipeline, preceding clam shell end cap, diesel oxidation catalyst, diesel emission particulate trap, urea nozzle, mixer apparatus
And selective catalytic reduction device；Before the air inlet pipeline is connected on clam shell end cap；The preceding clam shell end cap is mounted on diesel oil
The rear end of the front end of oxidation catalyzer, diesel oxidation catalyst connects diesel emission particulate trap；The mixer apparatus
It is connected with diesel emission particulate trap using pipeline, the rear end of mixer apparatus is urged by connection end cap connection selectivity
Change reduction apparatus, pipeline after the rear end connection of selective catalytic reduction device；The mixer apparatus includes mixing chamber cylinder, rotation
Flow blade tube, partition board, Kong Guan, blanking cover and flange orifice plate；The swirl vane Guan Yukong pipes connect to form eddy flow mix aperture pipe, rotation
Stream mix aperture pipe is obliquely arranged across partition board in mixing chamber cylinder, and blanking cover is arranged with flange orifice plate at the end of mixing chamber cylinder
The front end at end, mixing chamber cylinder is equipped with mixing chamber end cap, and urea nozzle is mounted on mixing chamber end cap.
Further, the preceding clam shell end cap is flat.
Further, it is in 15-25 ° of angle, the urea between the eddy flow mix aperture pipe and the axis of mixing chamber cylinder
The axis collinear of nozzle and eddy flow mix aperture pipe.
Further, the hole on the flange orifice plate is two kinds of apertures of size, the hole in the half-circle area of nearly blanking cover side
Diameter is less than rest part.
Further, the aperture on the flange orifice plate in the half-circle area of nearly blanking cover side is 3-5mm, and rest part is
5-7mm。
Further, the pipeline includes preceding pipeline and middle pipeline, passes through connecting flange phase between preceding pipeline and middle pipeline
Connection.
Further, the partition board include perpendicular to mixing chamber tubular axis separator segment and be sleeved on eddy flow mix aperture pipe
Outer arc cylinder section, separator segment are equipped with the flange towards mixing chamber end cap.
Further, the partition board is welded in mixing chamber cylinder, and the side of the nearly pipeline of partition board is provided with slot.
Further, the blanking cover is connect with hole pipe using full weld, and flange orifice plate is set to mixing chamber cylinder and connecting pin
The junction of lid.
Further, the connection end cap is in micro- expansion shape.
Compared with the prior art, the advantages of the present invention are as follows：
1, HC is aoxidized by diesel oxidation catalyst（Hydrocarbon）、CO（Carbon monoxide）Equal pollutants, diesel engine carbon black
Grain trap traps soot particulate, and the pollutants such as selective catalytic reduction device nitrogen oxides reduction, whole device can be by tail
Gas disposal is to meeting six discharge standard of state；
2, it arranges more flexible：Diesel emission particulate trap and diesel emission particulate trap use the side of tight coupling arrangement
Formula, urea nozzle and mixer are integrated in an oval case structure, diesel emission particulate trap and selective catalysis
Reduction apparatus arrangement distance is farther out；
3, flat end cap has good air-flow immixture, diesel emission particulate trapping before diesel emission particulate trap
Device end face airflow homogeneity and fuel oil uniformity are good, improve the transformation efficiency and service life of catalytic converter, and for below
Regeneration provides guarantee to diesel emission particulate trap safely；
4, urea nozzle and novel mixer Integrated design, compact-sized, urea knot occurs for urea and air-flow good mixing effect
Brilliant risk is small.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the dimensional structure diagram of the present invention.
Fig. 3, Fig. 4 be the present invention in urea nozzle, oblique cutting eddy flow mix aperture pipe and orifice plate structural schematic diagram.
Reference sign：Clam shell end cap, 4- diesel oxidation catalysts, 5- connect before 1- inlet flanges, 2- air inlet pipelines, 3-
Pipeline, the spray of 11- urea in pipeline, 9- connecting flanges, 10- before connect cylinder, 6- diesel emission particulates trap, 7- rear end caps, 8-
Mouth, 12- mixing chambers cylinder, 12-1- mixing chambers end cap, 13- connection end caps, 14- selective catalytic reduction devices, 15- catalysis are also
Pipeline, 17- outlets flange, 18- swirl vanes pipe, 19- partition boards, the holes 20- pipe, 21- blanking covers, 22- flanging bores after former end cap, 16-
Plate.
Specific implementation mode
The specific implementation mode of the present invention is further described below in conjunction with the accompanying drawings.
As shown in Figs. 1-2：Light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe post-processes encapsulating structure, including air inlet pipeline 2, preceding
Clam shell end cap 3, diesel oxidation catalyst 4, diesel emission particulate trap 6, urea nozzle 11, mixer apparatus and selectivity
Catalytic reduction device 14.
Wherein, before air inlet pipeline 2 is connected on clam shell end cap 3, inlet flange 1 is equipped in the front end of air inlet pipeline 2.It is limited
In arrangement space, preceding clam shell end cap 3 is designed to flat, is provided simultaneously with good flow field characteristic, makes air-flow in flat space
It is interior that violent immixture occurs, meet the flow velocity uniformity index of diesel oxidation catalyst, and flat clam shell end cap is set
Meter, greatly enhances the spatial adaptation ability of tight coupling partial encapsulation structure.Preceding clam shell end cap 3 is mounted on diesel oxidation catalyst
4 front end, the rear end connection diesel emission particulate trap 6 of diesel oxidation catalyst 4.Diesel oxidation catalyst 4 and diesel oil
Machine carbon soot particles trap 6 is connected to by connecting cylinder 5, and connecting cylinder 5 is cone barrel, and the big end of cone cylinder connects diesel oxidation catalyst
4, the small end connection diesel emission particulate trap 6 of cone cylinder.Mixer apparatus is trapped using pipeline and diesel emission particulate
Device 6 is connected, and for piping connection on the rear end cap 7 of diesel emission particulate trap 6, pipeline includes preceding pipeline 8 and middle pipeline
10, it is connected by connecting flange 9 between preceding pipeline 8 and middle pipeline 10.The rear end of mixer apparatus is connected by connection end cap 13
Selective catalytic reduction device 14, pipeline 16 after the rear end connection of selective catalytic reduction device 14 are connect, rear pipeline 16 is connected to
On catalysis reduction end cap 15,16 end of rear pipeline connects outlet flange 17.Connection end cap 13 is in micro- expansion shape, by expansionary effect
Effect, improve the mixing uniformity of air-flow again.
As shown in Figs 1-4：Mixer apparatus includes mixing chamber cylinder 12, swirl vane pipe 18, partition board 19, hole pipe 20, blocks up
Lid 21 and flange orifice plate 22.Wherein, swirl vane pipe 18 connect to form eddy flow mix aperture pipe with hole pipe 20, and eddy flow mix aperture pipe is worn
It crosses partition board 19 to be obliquely arranged in mixing chamber cylinder 12, blanking cover 21 is arranged with flange orifice plate 22 at the end of mixing chamber cylinder 12
The front end at end, mixing chamber cylinder 12 is equipped with mixing chamber end cap 12-1, and urea nozzle 11 is mounted on mixing chamber end cap 12-1.Mixing
Chamber cylinder 12 and mixing chamber end cap 12-1 can be in ellipticity.It is between eddy flow mix aperture pipe and the axis of mixing chamber cylinder 12
15-25 ° of angle, the axis collinear of urea nozzle 11 and eddy flow mix aperture pipe, its angle is 20 ° in one embodiment.Flange
Hole on orifice plate 22 is two kinds of apertures of size, and the aperture in the half-circle area of 21 side of nearly blanking cover is smaller.Specifically, flange orifice plate
Aperture on 22 in the half-circle area of 21 side of nearly blanking cover is that 3-5mm, rest part 5-7mm are closely blocked up in one embodiment
The aperture of lid 21 is 4mm, rest part 6mm.Partition board 19 is special-shaped partition board, include perpendicular to 12 axis of mixing chamber cylinder every
Plate section and the arc cylinder section being sleeved on outside eddy flow mix aperture pipe, separator segment are equipped with the flange towards mixing chamber end cap 12-1.Every
Plate 19 is welded in mixing chamber cylinder 12, and the side of nearly pipeline 10 is provided with slot.Blanking cover 21 is connect with hole pipe 20 using full weld, is turned over
Lateral opening plate 22 is set to the junction of mixing chamber cylinder 12 and connection end cap 13.
Operation principle：Engine exhaust is entered by inlet flange 1 in air inlet pipeline 2, and exhaust enters preceding clam shell end cap 3
In mixing chamber, mixing is abundant, and then exhaust enters in diesel oxidation catalyst 4, the objects such as HC, CO and NO in oxidation exhaust
Matter, diesel oxidation catalyst 4 are connected to diesel emission particulate trap 6 by connector drum 5, and air-flow enters diesel engine carbon black
In grain catcher 6, in exhaust 99% or more soot particulate is filtered out, air-flow passes through rear end cap 7, preceding pipeline 8, middle pipe again
Road 10 enters in mixer apparatus, and under conditions of meeting the strategy of injection urea liquid, urea nozzle 11 is by aqueous solution of urea
It is injected in mixer apparatus, aqueous solution of urea mixes fully with exhaust in mixer apparatus, and mixed urea is entering
14 front evaporator of selective catalytic reduction device is abundant, generates the ammonia for the amount for meeting emission request, and ammonia enters selective catalysis
Occur selective catalytic reduction reaction in reduction apparatus 14 with nitrogen oxides, water etc., most of NOx in purification exhaust, so
End cap 15 is restored by catalysis afterwards and rear pipeline 16 is discharged into air.By a whole set of after-treatment device, can finally reach state six and
Above discharge standard.
Aqueous solution of urea is sprayed into through urea nozzle 11 in mixing cavity configuration, primarily enters the inside of swirl vane pipe 18,
Exhaust is entered by middle pipeline 10 in mixer apparatus, and the exhaust having just enter into mixing chamber cylinder 12 largely flows to eddy flow leaf
In piece pipe, under the action of swirl vane, the aqueous solution of urea that urea nozzle 11 sprays into after strong shattering process, exhaust with
The mixture of aqueous solution of urea is discharged by hole pipe 20 again, experienced second-time breakage, since eddy flow mix aperture pipe oblique cutting is arranged, is improved
The whole urea mixed effect of urea nozzle 11, but also due to eddy flow mix aperture pipe oblique cutting cloth are biased in mixing chamber end cap 12-1
It sets, for air-flow when being shed by 20 aperture of hole pipe, there are one inclined flow tendencies for whole tool, slot, are conducive on partition board 19
Dispel the urea droplets assembled due to oblique flow trend and ammonia, the mixture of exhaust and urea liquid portal pipe 20 and every
After the slot of plate 19, urea droplets pass through the third time fragmentation of flange orifice plate 22, while 22 nearly blanking cover of flange orifice plate, 21 side
Because of opening diameter smaller, there is correction again to the incoming of oblique flow trend.On the whole, mixed using the eddy flow of oblique cutting
Close hole pipe arrangement has good effect to biasing incoming situation, and in the mixed structure, aqueous solution of urea undergoes 3 times and breaks
Broken effect, the breakup of drop is abundant, greatly reduces crystallization risk, and mixed structure makes aqueous solution of urea be mixed with exhaust fully,
Mixed air-flow is expanded after flowing out flange orifice plate 22, by connection end cap 13 since connection end cap 13 is in micro- expansion shape
The effect of effect improves the mixing uniformity of air-flow again.Into the mixed airflow of selective catalytic reduction device 14, hair
Raw a series of selective catalytic reduction reaction, most of nitrogen oxides in purification exhaust make exhaust meet state six and more
Stringent emission regulation demands.
Technical solution using the present invention not only solves the problem of tight coupling portioned product arrangement space harshness, while bavin
Oil machine carbon soot particles trap is with selective catalytic reduction device arrangement apart from farther out so that arrangement form is more flexible, urea
Nozzle and novel mixer Integrated design, compact-sized, urea crystals risk occurs for urea and air-flow good mixing effect small.
Claims (10)
1. light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe post-processes encapsulating structure, including air inlet pipeline（2）, preceding clam shell end cap（3）、
Diesel oxidation catalyst（4）, diesel emission particulate trap（6）, urea nozzle（11）, mixer apparatus and selective catalysis
Reduction apparatus（14）；The air inlet pipeline（2）Clam shell end cap before being connected to（3）On；The preceding clam shell end cap（3）Mounted on diesel oil
Oxidation catalyzer（4）Front end, diesel oxidation catalyst（4）Rear end connect diesel emission particulate trap（6）；It is described mixed
Clutch device utilizes pipeline and diesel emission particulate trap（6）It is connected, the rear end of mixer apparatus passes through connection end cap
（13）Connect selective catalytic reduction device（14）, selective catalytic reduction device（14）Rear end connection after pipeline（16）；Its
It is characterized in that, the mixer apparatus includes mixing chamber cylinder（12）, swirl vane pipe（18）, partition board（19）, Kong Guan（20）, it is stifled
Lid（21）With flange orifice plate（22）；The swirl vane pipe（18）It is managed with hole（20）Connection forms eddy flow mix aperture pipe, and eddy flow is mixed
Hole pipe is closed across partition board（19）Obliquely it is arranged in mixing chamber cylinder（12）It is interior, blanking cover（21）With flange orifice plate（22）Setting is mixed
Close chamber cylinder（12）End, mixing chamber cylinder（12）Front end be equipped with mixing chamber end cap（12-1）, urea nozzle（11）Installation
In mixing chamber end cap（12-1）On.
2. light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe according to claim 1 post-processes encapsulating structure, which is characterized in that
The preceding clam shell end cap（3）It is flat.
3. light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe according to claim 1 post-processes encapsulating structure, which is characterized in that
The eddy flow mix aperture pipe and mixing chamber cylinder（12）Axis between be in 15-25 ° of angle, the urea nozzle（11）With eddy flow
The axis collinear of mix aperture pipe.
4. light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe according to claim 1 post-processes encapsulating structure, which is characterized in that
The flange orifice plate（22）On hole be two kinds of apertures of size, nearly blanking cover（21）Aperture in the half-circle area of side is less than remaining
Part.
5. light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe according to claim 4 post-processes encapsulating structure, which is characterized in that
The flange orifice plate（22）Upper nearly blanking cover（21）Aperture in the half-circle area of side is 3-5mm, rest part 5-7mm.
6. light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe according to claim 1 post-processes encapsulating structure, which is characterized in that
The pipeline includes preceding pipeline（8）With middle pipeline（10）, preceding pipeline（8）With middle pipeline（10）Between pass through connecting flange（9）Phase
Connection.
7. light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe according to claim 1 post-processes encapsulating structure, which is characterized in that
The partition board（19）Including perpendicular to mixing chamber cylinder（12）The separator segment of axis and the arc being sleeved on outside eddy flow mix aperture pipe
Cylinder section, separator segment are equipped with towards mixing chamber end cap（12-1）Flange.
8. light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe according to claim 1 post-processes encapsulating structure, which is characterized in that
The partition board（19）It is welded on mixing chamber cylinder（12）It is interior, partition board（19）Nearly pipeline（10）Side be provided with slot.
9. light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe according to claim 1 post-processes encapsulating structure, which is characterized in that
The blanking cover（21）It is managed with hole（20）It is connected using full weld, flange orifice plate（22）It is set to mixing chamber cylinder（12）With connection end cap
（13）Junction.
10. light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe according to claim 1 post-processes encapsulating structure, feature exists
In the connection end cap（13）In micro- expansion shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810143591.6A CN108397262A (en) | 2018-02-12 | 2018-02-12 | Light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe post-processes encapsulating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810143591.6A CN108397262A (en) | 2018-02-12 | 2018-02-12 | Light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe post-processes encapsulating structure |
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| Publication Number | Publication Date |
|---|---|
| CN108397262A true CN108397262A (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810143591.6A Pending CN108397262A (en) | 2018-02-12 | 2018-02-12 | Light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe post-processes encapsulating structure |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109322733A (en) * | 2018-10-18 | 2019-02-12 | 重庆小康工业集团股份有限公司 | A kind of close coupled type exhaust system assembly |
| CN109356693A (en) * | 2018-11-13 | 2019-02-19 | 浙江银轮机械股份有限公司 | A kind of close-coupled mixer assembly |
| CN109838293A (en) * | 2019-03-29 | 2019-06-04 | 潍柴动力股份有限公司 | A kind of mixer |
| CN110761878A (en) * | 2019-12-03 | 2020-02-07 | 一汽解放汽车有限公司 | Box type integrated urea nozzle post-processor assembly |
| CN110836136A (en) * | 2019-07-30 | 2020-02-25 | 万向通达股份公司 | Vehicle postprocessor and rotary vane tube thereof |
| WO2020113456A1 (en) * | 2018-12-05 | 2020-06-11 | 潍柴动力股份有限公司 | Urea mixer and scr system |
| CN113027573A (en) * | 2021-02-08 | 2021-06-25 | 凯龙高科技股份有限公司 | Wall flow vortex mixer |
| CN114575980A (en) * | 2022-03-04 | 2022-06-03 | 广西玉柴机器股份有限公司 | Tightly-coupled diesel engine exhaust aftertreatment system and method |
| US11773763B2 (en) | 2019-09-13 | 2023-10-03 | Donaldson Company, Inc. | Dosing and mixing assemblies for exhaust aftertreatment system |
| US11840952B2 (en) | 2019-07-11 | 2023-12-12 | Donaldson Company, Inc. | Dosing conduit arrangements for exhaust aftertreatment system |
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Application publication date: 20180814 |