CN107435576A - Integrated exhaust gas aftertreatment system - Google Patents
Integrated exhaust gas aftertreatment system Download PDFInfo
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- CN107435576A CN107435576A CN201610365291.3A CN201610365291A CN107435576A CN 107435576 A CN107435576 A CN 107435576A CN 201610365291 A CN201610365291 A CN 201610365291A CN 107435576 A CN107435576 A CN 107435576A
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- Prior art keywords
- scrof
- unit
- cover
- flange
- exhaust gas
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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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
-
- 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
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
-
- 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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
一种尾气后处理系统，用于处理发动机尾气，包括：罩盖(3，4)，其内限定出混合室；氧化催化器单元(1)和SCRoF单元(2)，它们组装在所述罩盖上，且氧化催化器单元(1)的出口端和SCRoF单元(2)的入口端与混合室流体连通；还原剂计量模块(5)，其安装在所述罩盖上，用于将还原剂喷流喷射到从所述氧化催化器单元(1)的出口端进入所述混合室的尾气中；以及导流盘(6)，其面对SCRoF单元(2)的入口端布置在罩盖中，并且配置成在其与罩盖之间形成两侧分支通道，这两个分支通道的上游端朝向氧化催化器单元(1)的出口端的一侧，下游端通向SCRoF单元(2)的入口端。
An exhaust gas aftertreatment system for treating engine exhaust gas, comprising: a cover (3, 4) defining a mixing chamber therein; an oxidation catalyst unit (1) and a SCRoF unit (2), which are assembled in the cover The cover is on, and the outlet port of the oxidation catalyst unit (1) and the inlet port of the SCRoF unit (2) are in fluid communication with the mixing chamber; the reducing agent metering module (5), which is installed on the cover, is used to reduce the agent spray into the exhaust gas entering the mixing chamber from the outlet port of the oxidation catalyst unit (1); , and configured to form two-sided branch passages between it and the cover, the upstream ends of these two branch passages face one side of the outlet end of the oxidation catalyst unit (1), and the downstream ends lead to the side of the SCRoF unit (2) entry port.
Description
Technical field
The application is related to a kind of integrated after-treatment system, and it is particularly suitable for being arranged in enging cabin,
For handling the tail gas of engine, especially diesel engine emissions.
Background technology
Harmful components are included in motor exhaust.In order to reduce the discharge capacity of harmful components in tail gas, respectively
The post-processing technology of formula various kinds is developed.It is a kind of be typically used for the tail gas of diesel engine after locate
Reason system includes diesel oxidation catalyst (DOC), SCR module (SCR) and diesel oil
Grain catcher (DPF).DOC, SCR and DPF can be disposed in series in below vehicle chassis.
In this layout, due to relatively large free space be present, therefore all parts of easily arranging.
In another type of layout, DOC, SCR and DPF are arranged in enging cabin.According to
This layout, the after-treatment system due to be arranged between engine distance closer to and heat waste is less,
So as to improved vent gas treatment performance, be used to dispose institute but then, in enging cabin
The space for stating after-treatment system is limited.In order to tackle this situation, SCRoF technologies are suggested, according to
This technology, SCR are integrated in DPF, to reduce system dimension.In this SCRoF schemes,
DOC is combined by a short mixing section with SCRoF, and urea liquid is injected into the mixing
Duan Zhong, to ensure Urea Evaporation.Due to DOC and SCRoF all have large-size matrix, two
Person occupies very big space, and the space for leaving mixing section for is very limited.Therefore, it is intended that to this layout
Complex optimum is carried out in size and aspect of performance.
The content of the invention
The purpose of the application is to provide a kind of after-treatment system for motor exhaust, and it has
The size of reduction and improved performance.
Therefore, the application provides a kind of exhaust gas aftertreatment system in terms of one, sent out for handling
Motivation tail gas, including：Cover lid, limits mixing chamber in it；Oxidation catalyzer unit and SCRoF are mono-
Member, they are assembled in the cover and covered, the port of export of oxidation catalyzer unit and entering for SCRoF units
Mouth end is in fluid communication with mixing chamber；Reductant metering module, it is arranged on the cover and covered, for inciting somebody to action
Reducing agent jet flow is ejected into the tail gas for entering the mixing chamber from the port of export of the oxidation catalyzer unit
In；And flow guiding disc, it is arranged in cover lid in face of the arrival end of SCRoF units, and is configured to
The branched bottom of both sides, the upstream end direction oxidation of the two branched bottoms are formed between cover lid at it
The port of export of catalyser unit, downstream respectively lead to the arrival end of SCRoF units.
Tail gas of this exhaust gas aftertreatment system particularly suitable for handling diesel engine emissions, and it is special
It is not adapted to be mounted within enging cabin.
According to a kind of embodiments possible, the oxidation catalyzer unit and SCRoF units are parallel to each other
The cover lid is mounted side by side in ground.
According to a kind of embodiments possible, the flow guiding disc includes：Plate body, in the plate body formed with
Through hole, the through hole define the inner rim of plate body；And along a part for plate body inner rim from plate body
The flange of stretching, forms in the flange jagged, and the breach facing away from the oxidation catalyzer list
The port of export of member, and form the downstream of described two branched bottoms.
According to a kind of embodiments possible, in arrival end of the plate body loaded on the SCRoF units,
So that arrival end of the through-hole face against the SCRoF units, the flange are closely pushed against in described
Cover the bottom wall of lid.
According to a kind of embodiments possible, the through hole towards oxidation catalyzer unit the port of export that
Side is relative to the plate body eccentric setting.
According to a kind of embodiments possible, the flange includes the port of export in face of oxidation catalyzer unit
Interlude and the curved side section positioned at interlude both sides.
According to a kind of embodiments possible, the interlude towards oxidation catalyzer unit the port of export that
Side bloats, and curvature is more than each side section.
According to a kind of embodiments possible, the flow guiding disc also include from the neighboring of plate body along with institute
The flange that the opposite direction of flange protrudes from plate body is stated, formed with slit, the slit in the flange
Establish and connect between one or both of described two branched bottoms and the arrival end of SCRoF units, make
The part that the tail gas of one or both of described two branched bottoms must be flowed through enters through the slit
In the arrival end of SCRoF units.
According to a kind of embodiments possible, the slit is located at the same side of the breach of flange.
According to a kind of embodiments possible, the circumferential center of the slit is along the circumferential direction relative to flange
The circumferential center of breach stagger.
According to a kind of embodiments possible, the exhaust gas aftertreatment system is also included facing to Liang Ge branches
The upstream end of passage is arranged in the additional hybrid element in mixing chamber.
According to a kind of embodiments possible, the cover lid includes the first to the 3rd longitudinally coherent cover portions
Point, wherein oxidation catalyzer unit is connected to the first hood section, and SCRoF units are connected to the second cover
Cover, the profile of the 3rd hood section among longitudinal direction is relative to the first and second hood sections
Horizontal constriction.
It is by the cover lid for limiting mixing chamber that oxidation catalyzer unit and SCRoF is mono- according to the application
Member integrates, there is provided goes out a kind of compact exhaust gas aftertreatment system, is particularly suited for being installed to
In enging cabin.Single flow guiding disc is arranged in cover lid facing to SCRoF units so that tail gas and
The reducing agent for spraying into mixing chamber is guided by flow guiding disc and is entered SCRoF units in the form of two-way eddy flow,
It is achieved thereby that reducing agent adequately and uniformly mixes in tail gas, the harmful components in tail gas can be by more
Efficiently remove.
Brief description of the drawings
The foregoing and other side of the application will be discussed in detail and by more by what is done with reference to the accompanying drawings
It is fully understood by and understands, wherein：
Fig. 1 is the front view according to a kind of exhaust gas aftertreatment system of embodiments possible of the application；
Fig. 2,3 are the right view and stereogram of the exhaust gas aftertreatment system in Fig. 1 respectively；
Fig. 4 is the perspective view of the exhaust gas aftertreatment system, wherein the part for covering lid is removed to show
The internal structure of mixing chamber；And
Fig. 5,6 are to be used in the exhaust aftertreatment according to a kind of embodiments possible of the application respectively
The front view and stereogram of flow guiding disc in system.
Embodiment
Present invention relates generally to a kind of exhaust gas aftertreatment system, and for handling motor exhaust, its is outstanding
It is adapted to be mounted within enging cabin.The exhaust gas aftertreatment system of the application is typically adapted for use with place
Manage the tail gas of diesel engine；However, the exhaust gas aftertreatment system is equally applicable to other types of hair
Motivation (some parts in system may need correspondingly to change).
Fig. 1 to 4 shows the integrated exhaust gas aftertreatment system of the application.The exhaust gas aftertreatment system
Mainly include oxidation catalyzer unit 1 and SCRoF units 2.SCRoF units 2 are a single-pieces
Component, wherein being combined with SCR function and granule capturing (filtering) function.Oxidation is urged
Change device unit 1 and SCRoF units 2 are assembled in the first cover body 3, the cover body of the first cover body 3 and second
4 combine and form a cover lid.
Hydrocarbon and carbon monoxide in tail gas occur anti-in oxidation catalyzer unit 1 with oxygen
Answer and generate water and carbon dioxide.Reductant metering module 5 (illustrate only its injection tip part) in figure
Reducing agent (for example, aqueous solution of urea) jet flow is injected into tail gas stream in a manner of metering.Reduction
Agent is atomized and mixed in tail gas stream, then in SCRoF units 2 under the booster action of catalyst
Reacted with nitrogen oxides and oxygen and form harmless nitrogen and water.Particulate matter in tail gas simultaneously
Or soot is become trapped in SCRoF units 2.
Oxidation catalyzer unit 1 has general cylindrical shape housing 11, and it (forms oxidation to urge in first end
Change the port of export of device unit 1, the right-hand member in Fig. 1) the first cover body 3 is installed on, and opposite second
End (forming the arrival end of oxidation catalyzer unit 1, the left end in Fig. 1) combination has or is integrally formed
There is approach cone 12.In the example in the figures, the first cover body 3 carries the periphery of the first end of housing 11
A part；According to other embodiments possibles, the first cover body 3 can also be designed around housing 11
First end whole periphery installation.
Housing 11 limits the central axis of oxidation catalyzer unit 1.Approach cone 12 is equipped with introducing
Port 13.Inlet port 13 preferably limits eccentric relative to the central axis of oxidation catalyzer unit 1
And inclined central axis.Correspondingly, the central axis of approach cone 12 is preferably also relative to oxidation catalysis
The central axis of device unit 1 is eccentric and tilts.Inlet port 13 is configured to be connected to close to engine
Upstream exhaust gas pipeline section, for example, the charging turbine being connected in waste gas recycling (EGR) system goes out
Mouth end.Inlet port 13 receives the tail gas from engine emission, and tail gas flows through oxidation with cyclone mode and urged
Change device unit 1, this can strengthen the catalytic reaction in oxidation catalyzer unit 1.
SCRoF units 2 have general cylindrical shape housing 21, and it (it is mono- to form SCRoF in first end
The arrival end of member 2, the right-hand member in Fig. 1) the first cover body 3 is installed on, and in the second opposite end (structure
Into the port of export of SCRoF units 2, the left end in Fig. 1) combination has or is formed with outlet cone 22.
In the example in the figures, the first cover body 3 is installed around the whole periphery of the first end of housing 21；Root
According to other embodiments possibles, the first cover body 3 can also the only periphery of the first end of support housing 21
A part.
Housing 21 limits the central axis of SCRoF units 2.Outlet cone 22 is equipped with discharge port
23.The preferred restriction of discharge port 23 is eccentric and inclined relative to the central axis of SCRoF units 2
Central axis.Correspondingly, the central axis of outlet cone 22 is preferably also relative to SCRoF units 2
Central axis is eccentric and tilts.Discharge port 23 is configured to be attached to downstream exhaust gas pipeline section, to arrange
Put or further handle the tail gas after exhaust gas aftertreatment system is handled.Tail gas is intended to cyclone mode
Flowed in SCRoF units 2, it is anti-to strengthen selective reduction of the tail gas in SCRoF units 2
Should and particle filtering.
Oxidation catalyzer unit 1 and SCRoF units 2 are mounted side by side in the first cover body 3 in parallel to each other,
The distance between the two units are as small as possible.Second cover body 4 is hermetically combined on the first cover body 3
(partially around the first end of housing 11 periphery a part install) and formed it is described cover cover,
Mixing chamber is limited in cover lid.
In the axial direction that the central axis of oxidation catalyzer unit 1 and SCRoF units 2 limits, cover lid
Thickness depend on the second cover body 4 bottom wall 4a position.Oxidation catalyzer unit 1 and SCRoF
The central axis of unit 2 is preferably approximately perpendicular to bottom wall 4a corresponding site.
As shown in Figure 2,3, the cover lid is with the first cover portions facing to oxidation catalyzer unit 1
Divide 31, the second hood section 32 facing to SCRoF units 2 and be connected in the first hood section
31 and the second the 3rd hood section 33 between hood section 32.The inside of these three hood sections is empty
Between in the vertical link up and form the mixing chamber.
Perpendicular to the horizontal and vertical of the central axis of oxidation catalyzer unit 1 and SCRoF units 2
On, the first end of the outline and housing 11 of the first hood section 31 is generally corresponding to, the second cover portions
Points 32 outline is more than the first end of housing 21, and the outline of the 3rd hood section 33 is relative to the
One hood section 31 and the second constriction on width of hood section 32.The foreign steamer of second hood section 32
Wide perisporium 3a and the second cover body 4 for being connected by flange with perisporium 3a substantially by the first cover body 3
Bottom wall 4a corresponding site determine.End wall 21as of the perisporium 3a at the first end of housing 21,
So as to form general toroidal space between.It is separated by between the first end and bottom wall 4a of housing 21
One segment distance.
In an example shown, the cover lid formed by the first cover body 3 and the second cover body 4 has substantially flat
Flat shape shape.Here " flat " refers to that cover covers the center in oxidation catalyzer unit 1 and SCRoF units 2
Thickness on the direction of axis is much smaller than it perpendicular to oxidation catalyzer unit 1 and SCRoF units 2
Central axis direction on height and width.
It is appreciated that the first cover body 3 and the second cover body 4 of other forms are it is further envisaged that out.This
Outside, based on customer requirement, each several part for covering lid can be configured to have suitable shape and size.
In addition, oxidation catalyzer unit 1 and SCRoF units 2 are arranged on the same side of cover lid；However,
Based on the space requirement in enging cabin, they can also be arranged on the two opposite sides of cover lid, for example,
It is separately mounted on the first and second cover bodies 3,4.In addition, the relative position and orientation between them can
To change.
The port of export of oxidation catalyzer unit 1 connects with the inside of the first hood section 31, SCRoF units
2 arrival end connects with the inside of the second hood section 32.So, going out from oxidation catalyzer unit 1
The tail gas that mouth end is flowed into mixing chamber in the form of eddy flow vertically will change general flow direction in mixing chamber
(about change 90 degree) and edge and axially vertical longitudinal flow, then, change general flow direction again
(about change 90 degree) and enter axially into the arrival ends of SCRoF units 2.
Reductant metering module 5 covers installed in cover, is in fluid communication with mixing chamber.In example illustrated
In, reductant metering module 5 is arranged on the first hood section 31, specifically in the second cover body 4
On perisporium.
The injection tip of metering module 5 is installed and pointed to close to the port of export of oxidation catalyzer unit 1
The arrival end of SCRoF units 2, the center of the central axis of injection tip preferably with SCRoF units 2
Axis is simultaneously non-intersect, but staggers slightly.
The installation site of metering module 5 and direction cause the injection of the reducing agent sprayed from its injection tip
The big body phase in direction of rotation for the tail gas that direction is discharged into mixing chamber with the port of export from oxidation catalyzer unit 1
It is inverse or traverse.For example, the central axis of the injection tip of metering module 5 can be with oxidation catalyzer list
The central axis of member 1 intersects, or staggers from the central axis of oxidation catalyzer unit 1.
As shown in figure 4, in the arrival end of SCRoF units 2, equipped with flow guiding disc 6, its one kind can
Row embodiment is shown in Fig. 5,6, wherein, flow guiding disc 6 is preferably single structure, such as by
Metal sheet punching press is made.The flow guiding disc 6 includes the circular plate body 61 of general planar, the plate body 61
It is interior to define the inner rim of plate body 61 formed with through hole 62, the through hole 62.The through hole 62 is not centering
Be arranged in plate body 61, and be directed towards the radial direction side of plate body 61 biasing, i.e., with outside the side of plate body 61
Relatively near and plate body 61 the opposite side neighboring in periphery is farther out.In addition, the through hole 62 can be circular
, but preferably non-circular (being, for example, ellipse) or combined shaped.For example, such as Fig. 5
Shown, the through hole 62 is as general as circle, but in its position shape nearer with the neighboring of plate body 61
Into the shape bloated further towards the periphery of plate body 61.
In a part for the inner rim of plate body 61, formed with the continuous flange routed up from plate body
63.The flange 63 is approximately perpendicular to plate body 61, and around a part for through hole 62, i.e. flange
63 do not form whole circle, but are formed in that side away from the neighboring of plate body 61 farther out jagged.Accompany in
The shape of through hole 62, the flange 63 are included in the interlude away from that nearer side of the neighboring of plate body 61
The 63a and curved side section 63b positioned at interlude 63a both sides.Compared with each side section 63b, interlude
63a more bloats (i.e. curvature is bigger) towards the neighboring of plate body 61.
It is in addition, convex formed with being routed up towards the side opposite with flange 63 in the neighboring of plate body 61
Edge 64.The flange 64 can be the form of whole circle.
According to a kind of optional embodiment, one extended in the flange 64 formed with eye circumferencial direction
Section slit 65.In the example in the figures, the slit 65 is located at that side of breach in flange 63, but
The circumferencial direction center of slit 65 relative to the breach in flange 63 circumferencial direction center-biased.
In other embodiments possibles, various forms of slits 65 can be set.For example, slit 65
It can be opened in the different circumferential locations of flange 64, or even its circumferencial direction center can be with turning over
The circumferencial direction center superposition of breach in side 63.Furthermore, it is possible to form more than one slit 65.
As shown in figure 4, flow guiding disc 6 is installed on the first end of housing 21, shell is inserted with its flange 64
In end wall 21a at the first end of body 21.Therefore, the peripheral dimension of flange 64 should be arranged to be allowed to
The inner circumferential of end wall 21a at the first end of housing 21 is engaged, such as forms tight fit.In installment state
Under, the first end of the through hole 62 of flow guiding disc 6 facing to housing 21.The area of through hole 62 is less than housing
21 first end.
Plate body 61 be arranged to it is vertical with the axis of SCRoF units 2, can be with the first end of housing 21
Edge is concordant or vertically slightly into some in the first end of housing 21.Flange 63 is in the axial direction at least
Partly protrude from the first end of housing 21, and fitted together in the second cover body 4 and the first cover body 3
In the state of, flange 63 pushes against in the bottom wall 4a of the second cover body 4 with closing.
The installation position of flow guiding disc 6 causes the interlude 63a of its flange 63 to be approximately towards oxidation catalyzer
Unit 1, and the breach in flange 63 is substantially back to oxidation catalyzer unit 1.
So, fitted together in the second cover body 4 and the first cover body 3 and form the state of whole cover lid
Under, both sides arcuate limb passage, Mei Gefen are formd in the second hood section 32 by flow guiding disc 6
Subchannel by the end wall 21a of housing 21, the flange 63 of flow guiding disc 6, the first cover body 3 perisporium 3a
And second the bottom wall 4a of cover body 4 define.The upstream end of two branched bottoms is led to and meets at the 3rd
In hood section 33, downstream respectively leads to the breach in the flange 63 of flow guiding disc 6.First cover body 3
Perisporium 3a and housing 21 end wall 21a between annular space form the one of the two branched bottoms
Part.
So, the tail gas of longitudinal flow will be guided and entered by flow guiding disc 6 in the 3rd hood section 33
In two branched bottoms, flowed in two branched bottoms, then pass through the breach in flange 63, warp
Through hole 62 and enter in the arrival end of SCRoF units 2.
Due to the effect of the two branched bottoms, into two strands of tails in the arrival end of SCRoF units 2
Gas is in the form of eddy flow, as shown in the block arrow in Fig. 4.Also, because two branched bottoms cause
Circulation area reduces, therefore tail gas has the flowing velocity of increase in two branched bottoms, and leads
The speed ratio exhaust gas into the per share eddy flow in the arrival end of SCRoF units 2 is caused in the first hood section
31 and the 3rd flowing velocity in hood section 33 it is much higher.High-speed rotational adds two branched bottoms
The caused increased effect of length of flow so that reducing agent is more uniformly blended in tail gas.
The interlude 63a of flange 63 bloats towards oxidation catalyzer unit 1, can preferably guide tail
Gas enters the two branched bottoms.
The flow guiding disc of other forms can also design, as long as previously described Liang Ge branches can be formed
Passage.
In addition, in flange 64 formed with slit 65 in the case of, the end wall 21a of housing 21 phase
Position is answered formed with corresponding breach, with slit 65 is exposed and with the perisporium 3a of the first cover body 3
Annular space between the end wall 21a of housing 21 communicates.So, the part in the annular space
Tail gas directly can enter in the arrival end of SCRoF units 2 through the slit 65.Enter through slit 65
Enter the tail gas of the arrival end of SCRoF units 2 and will pour and enter SCRoF units 2 through two branched bottoms
Arrival end mobility of tail gas rotational in.
Slit 65 can be arranged on the circumferential position that the central axis of the injection tip of measured module 5 passes through
Put place.
In the operation of above-mentioned exhaust gas aftertreatment system, tail gas flows through inlet port 13 and approach cone 12
Enter oxidation catalyzer unit 1.In oxidation catalyzer unit 1 after being subject to processing, tail gas connects by first
Mouth 33 leaves oxidation catalyzer unit 1.Then the mixing chamber that the eddy flow of tail gas enters in cover lid, by also
The reducing agent jet flow that former agent metering module 5 is sprayed into mixing chamber is blended in tail gas, and in tail gas
It is atomized and evaporates under high temperature action.
Be mixed with reducing agent tail gas flow through the first hood section 31 and the 3rd hood section 33 of cover lid after,
Into in the second hood section 32, and run into flow guiding disc 6.The tail gas of reducing agent is mixed with by flow guiding disc
6 guide and enter two branched bottoms, are flowed along two branched bottoms, then through in flange 63
Breach, through hole 62 and in the form of high-speed rotational into SCRoF units 2 arrival end in.So
Caused high-speed rotational improves mixability of the reducing agent in tail gas.In the situation provided with slit 65
Under, this two strands of eddy flows can be hit by the tail gas that reducing agent is mixed with through the inflow of slit 65, and this is more
Be advantageous to mixing of the reducing agent in tail gas.
Then, two strands of eddy flows merge into one eddy flow in SCRoF units 2 and in SCRoF units 2
Middle flowing.In SCRoF units 2, tail gas reacts with reducing agent and oxygen.In tail gas
Grain thing is trapped by the trap in SCRoF units 2.After being handled through SCRoF units 2, relatively
Clean tail gas is discharged by outlet cone 22 and discharge port 23 by system.
In a kind of embodiments possible, blender (not shown) can be may be arranged to the 3rd cover portions
Divide in 33, facing to the upstream end of two branched bottoms, further to promote reducing agent in tail gas
Mixing and the evaporation of reducing agent.It is appreciated that blender is an optional element, Er Feizong
It is required.
The application formed therein that has by the way that oxidation catalyzer unit 1 and SCRoF units 2 are assembled into
In the same cover lid of mixing chamber, there is provided a kind of exhaust gas aftertreatment system closely.After the tail gas
Processing system is suitable for the enging cabin of small enging cabin, especially visitor's vehicle.
In addition, by using the flow guiding disc being arranged at the arrival end of SCRoF units, by mixing chamber
In the tail gas for being mixed with reducing agent from both sides, shunting bypass flow guiding disc, then and in the form of high-speed rotational
Flow into SCRoF units and bout together, therefore the mixture homogeneity of tail gas and reducing agent can carry
It is high.
, so can be with meanwhile tail gas can drastically change its flow direction twice in exhaust gas aftertreatment system
Strengthen the mixing between reducing agent and tail gas.In addition, reducing agent is atomized and steamed well in mixing chamber
Hair, therefore the situation that reducing agent drop encounters SCR matrix front end faces can be avoided the occurrence of, it can also avoid
Reducing agent crystallizes in mixing chamber.
In addition, by the way that flow guiding disc is made for into single-piece, welded without plate, therefore flow guiding disc 6
Easy to manufacture.
In addition, although two branched bottoms reduce circulation area, but in general, cover is still protected in covering
The circulation area of abundance is held, this makes it easy to mix with obtaining in terms of being avoided system pressure drop in reducing agent
Balance.
In the peripheral outer lips of flow guiding disc formed with slit in the case of, one of two branched bottoms or two
A part of tail gas in person will be directly entered in the arrival end of SCRoF units by slit, and is impacted
The tail gas flowed into by two branched bottoms, which further improves the mixed performance of reducing agent.
Although describing the application herein with reference to specific embodiment, scope of the present application is not
It is confined to shown details.In the case of the general principle without departing from the application, it is thin that these can be directed to
Section makes various modifications.
Claims (10)
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112154023A (en) * | 2018-05-31 | 2020-12-29 | 康明斯过滤Ip公司 | Filter assembly including removable outlet conduit |
| CN112567116A (en) * | 2018-09-06 | 2021-03-26 | 凯斯纽荷兰(中国)管理有限公司 | Improved aftertreatment system for a vehicle |
| WO2021112826A1 (en) * | 2019-12-03 | 2021-06-10 | Cummins Emission Solutions Inc. | Reductant delivery system for exhaust gas aftertreatment system |
| CN113530648A (en) * | 2020-04-20 | 2021-10-22 | 罗伯特·博世有限公司 | Tail gas aftertreatment system |
| CN116348195A (en) * | 2020-10-22 | 2023-06-27 | 康明斯排放处理公司 | exhaust aftertreatment system |
| US11828214B2 (en) | 2020-05-08 | 2023-11-28 | Cummins Emission Solutions Inc. | Configurable aftertreatment systems including a housing |
| US11982219B2 (en) | 2017-06-06 | 2024-05-14 | Cummins Emission Solutions Inc. | Systems and methods for mixing exhaust gases and reductant in an aftertreatment system |
| USD1042545S1 (en) | 2022-04-21 | 2024-09-17 | Cummins Emission Solutions Inc. | Aftertreatment system |
| USD1042544S1 (en) | 2022-04-21 | 2024-09-17 | Cummins Emission Solutions Inc. | Aftertreatment system |
| US12123337B2 (en) | 2021-03-18 | 2024-10-22 | Cummins Emission Solutions Inc. | Aftertreatment systems |
| US12188842B2 (en) | 2021-08-23 | 2025-01-07 | Cummins Emission Solutions Inc. | Outlet sampling system for aftertreatment system |
| US12264612B2 (en) | 2020-02-27 | 2025-04-01 | Cummins Emission Solutions Inc. | Mixers for use in aftertreatment systems |
| US12281605B2 (en) | 2021-07-27 | 2025-04-22 | Cummins Emision Solutions Inc. | Exhaust gas aftertreatment system |
| US12352196B2 (en) | 2021-02-02 | 2025-07-08 | Cummins Emission Solutions Inc. | Exhaust gas aftertreatment system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102892988A (en) * | 2010-05-25 | 2013-01-23 | 五十铃自动车株式会社 | Exhaust gas purification device |
| CN203452872U (en) * | 2013-03-08 | 2014-02-26 | 埃贝施佩歇尔排气技术有限及两合公司 | Inflow chamber used for exhaust catalyst and exhaust purifying system used for motor vehicle |
| CN103628958A (en) * | 2012-08-21 | 2014-03-12 | 埃贝斯佩歇排气技术有限责任两合公司 | Exhaust system with mixing and/or evaporating device |
| CN103649483A (en) * | 2011-07-05 | 2014-03-19 | 佛吉亚排气系统有限公司 | Exhaust gas purification assembly |
| CN103890336A (en) * | 2011-10-19 | 2014-06-25 | 依米泰克排放技术有限公司 | Device for mixing compressed air with liquid reducing agent |
| CN104040130A (en) * | 2012-01-12 | 2014-09-10 | 日野自动车株式会社 | Exhaust gas purification device |
| US20150013313A1 (en) * | 2013-07-12 | 2015-01-15 | Eberspacher Exhaust Technology GmbH & Co. KG | Multistage plate mixer |
| CN105041430A (en) * | 2014-04-29 | 2015-11-11 | 通用汽车环球科技运作有限责任公司 | Integrated mixing system for exhaust aftertreatment system |
-
2016
- 2016-05-27 CN CN201610365291.3A patent/CN107435576B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102892988A (en) * | 2010-05-25 | 2013-01-23 | 五十铃自动车株式会社 | Exhaust gas purification device |
| CN103649483A (en) * | 2011-07-05 | 2014-03-19 | 佛吉亚排气系统有限公司 | Exhaust gas purification assembly |
| CN103890336A (en) * | 2011-10-19 | 2014-06-25 | 依米泰克排放技术有限公司 | Device for mixing compressed air with liquid reducing agent |
| CN104040130A (en) * | 2012-01-12 | 2014-09-10 | 日野自动车株式会社 | Exhaust gas purification device |
| CN103628958A (en) * | 2012-08-21 | 2014-03-12 | 埃贝斯佩歇排气技术有限责任两合公司 | Exhaust system with mixing and/or evaporating device |
| CN203452872U (en) * | 2013-03-08 | 2014-02-26 | 埃贝施佩歇尔排气技术有限及两合公司 | Inflow chamber used for exhaust catalyst and exhaust purifying system used for motor vehicle |
| US20150013313A1 (en) * | 2013-07-12 | 2015-01-15 | Eberspacher Exhaust Technology GmbH & Co. KG | Multistage plate mixer |
| CN105041430A (en) * | 2014-04-29 | 2015-11-11 | 通用汽车环球科技运作有限责任公司 | Integrated mixing system for exhaust aftertreatment system |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11982219B2 (en) | 2017-06-06 | 2024-05-14 | Cummins Emission Solutions Inc. | Systems and methods for mixing exhaust gases and reductant in an aftertreatment system |
| CN112154023B (en) * | 2018-05-31 | 2022-04-26 | 康明斯过滤Ip公司 | Filter assembly including removable outlet conduit |
| US12115481B2 (en) | 2018-05-31 | 2024-10-15 | Cummins Filtration Ip, Inc. | Filter assembly including a removable outlet conduit |
| CN112154023A (en) * | 2018-05-31 | 2020-12-29 | 康明斯过滤Ip公司 | Filter assembly including removable outlet conduit |
| CN112567116B (en) * | 2018-09-06 | 2022-08-05 | 凯斯纽荷兰(中国)管理有限公司 | Improved aftertreatment system for vehicles |
| CN112567116A (en) * | 2018-09-06 | 2021-03-26 | 凯斯纽荷兰(中国)管理有限公司 | Improved aftertreatment system for a vehicle |
| WO2021112826A1 (en) * | 2019-12-03 | 2021-06-10 | Cummins Emission Solutions Inc. | Reductant delivery system for exhaust gas aftertreatment system |
| US12503969B2 (en) | 2019-12-03 | 2025-12-23 | Cummins Emission Solutions Inc. | Reductant delivery system for exhaust gas aftertreatment system |
| US12264612B2 (en) | 2020-02-27 | 2025-04-01 | Cummins Emission Solutions Inc. | Mixers for use in aftertreatment systems |
| CN113530648A (en) * | 2020-04-20 | 2021-10-22 | 罗伯特·博世有限公司 | Tail gas aftertreatment system |
| US11828214B2 (en) | 2020-05-08 | 2023-11-28 | Cummins Emission Solutions Inc. | Configurable aftertreatment systems including a housing |
| US12123334B2 (en) | 2020-05-08 | 2024-10-22 | Cummins Emission Solutions Inc. | Configurable aftertreatment systems including a housing |
| CN116348195A (en) * | 2020-10-22 | 2023-06-27 | 康明斯排放处理公司 | exhaust aftertreatment system |
| US12173632B2 (en) | 2020-10-22 | 2024-12-24 | Cummins Emission Solutions Inc. | Exhaust gas aftertreatment system |
| US12352196B2 (en) | 2021-02-02 | 2025-07-08 | Cummins Emission Solutions Inc. | Exhaust gas aftertreatment system |
| US12123337B2 (en) | 2021-03-18 | 2024-10-22 | Cummins Emission Solutions Inc. | Aftertreatment systems |
| US12281605B2 (en) | 2021-07-27 | 2025-04-22 | Cummins Emision Solutions Inc. | Exhaust gas aftertreatment system |
| US12188842B2 (en) | 2021-08-23 | 2025-01-07 | Cummins Emission Solutions Inc. | Outlet sampling system for aftertreatment system |
| USD1042544S1 (en) | 2022-04-21 | 2024-09-17 | Cummins Emission Solutions Inc. | Aftertreatment system |
| USD1042545S1 (en) | 2022-04-21 | 2024-09-17 | Cummins Emission Solutions Inc. | Aftertreatment system |
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Effective date of registration: 20221221 Address after: No. 10, Shuomei Road, Xinwu District, Wuxi City, Jiangsu Province Patentee after: Bosch Automotive Systems (Wuxi) Co.,Ltd. Address before: Stuttgart, Germany Patentee before: Robert Bosch Ltd. |