CN207178008U - Engine exhaust post-processes mixing arrangement and its after-treatment device - Google Patents
Engine exhaust post-processes mixing arrangement and its after-treatment device Download PDFInfo
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- CN207178008U CN207178008U CN201720925320.7U CN201720925320U CN207178008U CN 207178008 U CN207178008 U CN 207178008U CN 201720925320 U CN201720925320 U CN 201720925320U CN 207178008 U CN207178008 U CN 207178008U
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Abstract
A kind of engine exhaust post-processes mixing arrangement, and it includes installing the mounting seat of urea nozzle and hybrid element.For the hybrid element the urea droplets to be mixed with exhaust, the hybrid element includes mixing tube, and the mixing tube is provided with some spinning disks.The engine exhaust post processing mixing arrangement also includes the fine fibre element positioned at the bottom of the mixing tube, wherein the fine fibre element is passed through with for the exhaust and the urea droplets, further to increase the broken and evaporation of the urea droplets.It is arranged such, the utility model has stronger Crystallization.The utility model further relates to a kind of exhaust post-treatment apparatus of engine with the mixing arrangement.
Description
Technical field
A kind of engine exhaust post processing mixing arrangement and its after-treatment device are the utility model is related to, belongs to engine row
Gas post-processing technology field.
Background technology
Current is all to reach urea droplets and the mixing of exhaust with blender metal structure in the industry.Generally, in blender
The structures such as middle setting porous plate, fin, allow the blender of urea droplets and metal structure to collide so that urea droplets are broken
Smaller drop is broken into, to be advantageous to evaporate and be pyrolyzed in metal surface.Present situation is due to the upgrading of Abgasgesetz so that current
Urea injection strategy is more radical, such as begins to larger urea injecting quantity under lower temperature, smaller extraction flow.
Here the relation of heat conservation be present, one is heat required for urea droplets evaporation and pyrolysis, one be exhaust from
Heat caused by upstream.Due to the radicalization of above-mentioned injection strategy, the carried total amount of heat of exhaust and urea liquid fully steam
The ratio between heat required for hair, pyrolysis constantly reduces.Make EER ratio hot to describe this to one inside industry
Relation between amount.In general, EER values are extremely low in the crystallization risk of 150 mixer described above.If EER is no so high, but
It is that its Crystallization can improve if by being optimized to the structure of blender, this is also industry portion big absolutely
The R＆D direction of branch company, i.e., how to optimize the structure design of blender.
It please join shown in Fig. 1 and Fig. 2, perforated panel 1 ' is provided with blender 3 '.The perforated panel 1 ' is provided with some supply and discharges
Some perforates 2 ' that gas and the mixture of urea droplets pass through.On the one hand, the urea droplets beaten on perforated panel 1 ' are advantageous to reality
Existing its is crushed to obtain the smaller urea droplets of volume, so as to be more conducive to its evaporation and pyrolysis.On the other hand, in order to ensure perforate
Plate 1 ' possesses enough mechanical strengths, and the material part between perforate 2 ' is unavoidable.It is appreciated that in perforated panel 1 '
The back side, the flow velocity of air-flow compare relatively low, easily form local low regime M.Theoretical and experimental results prove, in the low speed
The possibility that urea crystals occur in area M is very big.
Therefore, it is necessary to a kind of new solution is provided to solve above-mentioned technical barrier.
Utility model content
The purpose of this utility model is to provide a kind of Crystallization stronger engine exhaust post processing mixing arrangement
And the exhaust post-treatment apparatus of engine with the mixing arrangement.
To achieve the above object, the utility model adopts the following technical scheme that：A kind of engine exhaust post processing mixing dress
Put, it includes installing the mounting seat of urea nozzle and hybrid element, and the urea nozzle to the engine arranging
Gas post processing mixing arrangement in jet atomization urea droplets, the hybrid element to by the urea droplets with exhaust carry out
Mixing, the hybrid element include mixing tube, and the mixing tube is provided with some spinning disks, the engine exhaust post processing mixing
Device also include positioned at the mixing tube bottom fine fibre element, wherein the fine fibre element with for it is described exhaust with
And the urea droplets pass through, further to increase the broken and evaporation of the urea droplets.
As the further improved technical scheme of the utility model, the engine exhaust post processing mixing arrangement includes shell
Body, the mounting seat are formed or are fixed on the housing；The urea nozzle is to the jet atomization into the mixing tube
Urea droplets.
As the further improved technical scheme of the utility model, the hybrid element also includes being socketed in the mixing tube
Periphery and the dividing plate in the housing, the housing is divided into positioned at the first cavity of the side of the dividing plate and position
In the second cavity of the opposite side of the dividing plate, the spinning disk is connected with first cavity.
As the further improved technical scheme of the utility model, the mixing tube is additionally provided with positioned at the upper of the spinning disk
Side and some perforation of the close mounting seat.
As the further improved technical scheme of the utility model, the mixing tube is in hollow cylindrical shape, the dividing plate
Include the horizontal part of the first vertical portion, the second vertical portion and connection first vertical portion and second vertical portion, wherein
The horizontal part is provided with the perforate passed through for the mixing tube.
As the further improved technical scheme of the utility model, the fine fibre element is steel wool or foam gold
Category, the fine fibre element are located in the mixing tube.
As the further improved technical scheme of the utility model, the engine exhaust post processing mixing arrangement is provided with solid
Some hold-down bars of the fixed fine fibre element.
The utility model further relates to a kind of exhaust post-treatment apparatus of engine, and it includes above-mentioned engine exhaust post processing
Mixing arrangement and the selective catalytic reducing agent (SCR) positioned at the downstream of engine exhaust post processing mixing arrangement.
As the further improved technical scheme of the utility model, the exhaust post-treatment apparatus of engine also includes being located at
The upstream of the engine exhaust post processing mixing arrangement and the diesel oxidation catalyst (DOC) and diesel particulate being sequentially connected in series
Trap (DPF).
Compared to prior art, the utility model makes urea droplets in fine fibre element by setting fine fibre element
Surface and internal generation are sufficiently broken with mixing.Further, since the line footpath of fine fibre element is smaller, space is complicated, heat-transfer area
Product is big, is advantageous to urea droplets and relatively sufficiently heat exchange occurs with exhaust, so as to the evaporation and pyrolysis beneficial to urea droplets, improve
Crystallization.
Brief description of the drawings
Fig. 1 is the diagrammatic cross-section for increasing porous plate in mixing tube in the prior art.
Fig. 2 is the diagrammatic cross-section of porous plate in Fig. 1, wherein the exhaust indicated and the flow direction of the mixture of urea droplets with
And the dead band at the back side.
Fig. 3 is the schematic perspective view of the utility model exhaust post-treatment apparatus of engine.
Fig. 4 is Fig. 3 part isometric exploded view.
Fig. 5 is the further three-dimensional exploded views of Fig. 4.
Fig. 6 is the stereogram of engine exhaust post processing mixing arrangement in Fig. 5.
Fig. 7 is Fig. 6 left view.
Fig. 8 is Fig. 6 right view.
Fig. 9 is the diagrammatic cross-section of line A-A in Fig. 6.
Figure 10 is Fig. 6 three-dimensional exploded view.
Figure 11 is the three-dimensional exploded view of another angles of Figure 10.
Figure 12 is to remove the stereogram after the partial shell in Fig. 6.
Figure 13 is the schematic perspective view of fine fibre element in Figure 10.
Embodiment
It please join shown in Fig. 3 to Figure 13, the utility model discloses a kind of exhaust post-treatment apparatus of engine 100, for example
To handle the tail gas of engine in such as SCR after-treatment systems.The exhaust post-treatment apparatus of engine 100 is arranged including engine
Gas post processing mixing arrangement 10, the diesel oil oxygen for post-processing the upstream of mixing arrangement 10 positioned at the engine exhaust and being sequentially connected in series
Change catalyst converter (DOC) 20 and diesel particulate trap (DPF) 30 and post-process mixing arrangement positioned at the engine exhaust
The selective catalytic reducing agent (SCR) 40 in 10 downstream.
The engine exhaust post processing mixing arrangement 10 includes housing 1, the hybrid element 2 being installed in the housing 1
And to the further fine fibre element 3 of the evaporation of increase urea droplets and pyrolysis.
In the utility model embodiment illustrated, the housing 1 is cylindrical, and it is provided with to the indent of housing 1
Sunken installing plate 11 and the mounting seat 12 for being formed or being fixed on the housing 1.In the embodiment party of the utility model diagram
In formula, the mounting seat 12 is welded on the installing plate 11.The hybrid element 2 is located at the installation along flow direction of exhaust gases
The downstream of seat 12.The mounting seat 12 is mixed to install urea nozzle (not shown) with being post-processed to the engine exhaust
The urea droplets of jet atomization in device 10.
The hybrid element 2 is the urea droplets to be mixed with exhaust.In the implementation of the utility model diagram
In mode, the hybrid element 2 includes mixing tube 21 and is socketed in the periphery of mixing tube 21 and is located in the housing 1
Dividing plate 22.The urea nozzle to urea droplets from the jet atomization to the mixing tube 21.It please join shown in Fig. 9, in this reality
With in new embodiment illustrated, the housing 1 is divided into the first chamber positioned at the side of the dividing plate 22 by the dividing plate 22
Second cavity 120 of body 110 and opposite side positioned at the dividing plate 22.
The mixing tube 21 is in hollow tubular, its be provided with the spinning disk 211 that is connected with first cavity 110 and
Positioned at the top of the spinning disk 211 and close to some perforation 212 of the mounting seat 12.In the implementation of the utility model diagram
In mode, the spinning disk 211 can form the mixed effect of eddy flow, so as to add mixing distance, reduce urea crystals
Risk.
The dividing plate 22 include the first vertical portion 221, the second vertical portion 222 and connection first vertical portion 221 with
The horizontal part 223 of second vertical portion 222, wherein the horizontal part 223 is provided with the perforate passed through for the mixing tube 21
224。
Please join shown in Figure 13, in the utility model embodiment illustrated, the fine fibre element 3 be steel wool or
Foam metal, the fine fibre element 3 are located in the mixing tube 21.The engine exhaust post processing mixing arrangement 10 is provided with
Some hold-down bars 4 of the fixed steel wool.Certainly in other embodiments, the fine fibre element 3 can also be netted
Porous material of steel wire or ceramics etc..
The utility model utilizes the 3D loose structures or multiple-void structure of fine fibre element 3 (such as steel wool), exhaust
And the urea droplets pass through the fine fibre element 3, make urea droplets sufficiently broken on the surface of steel wool and internal generation
It is broken with mixing.In addition, the line footpath of steel wool is smaller, space is complicated, and specific surface area is big.Because specific surface area is big, in limited sky
It is interior to create bigger heat exchange area, be advantageous to urea droplets and occur relatively sufficiently to exchange heat with exhaust, so as to beneficial to urine
The evaporation and pyrolysis of plain drop, improve Crystallization.Can correspondingly it be adjusted by the regulation of the density to fine fibre element 3
The back pressure of whole system.
Compared to the structure such as antipriming pipe of the prior art and fin, the line footpath of fine fibre element 3 of the present utility model is all
Very small (being, for example, less than 1mm), therefore the appearance of lee face can be avoided, so as to reduce urea crystals risk.The utility model
This ground-breaking utility model both solve the problems, such as low regime, solve the problems, such as heat exchange again, there is prominent essence
Property feature and significant progressive.
In addition, above example is merely to illustrate the utility model and not limits the technical side described by the utility model
Case, understanding of this description should be based on persons of ordinary skill in the field, although this specification is with reference to above-mentioned
Embodiment has been carried out being described in detail to the utility model, still, it will be understood by those within the art that, affiliated skill
Still the utility model can be modified by the technical staff in art field or equivalent substitution, and all do not depart from this practicality newly
The technical scheme of the spirit and scope of type and its improvement, it all should cover in right of the present utility model.
Claims (9)
1. a kind of engine exhaust post-processes mixing arrangement, it includes installing the mounting seat of urea nozzle and mixing member
Part, the urea nozzle are described mixed to post-process the urea droplets of jet atomization in mixing arrangement to the engine exhaust
Element is closed the urea droplets to be mixed with exhaust, the hybrid element includes mixing tube, and the mixing tube is provided with
Some spinning disks, it is characterised in that：The engine exhaust post processing mixing arrangement is also included positioned at the bottom of the mixing tube
Fine fibre element, wherein the fine fibre element with for it is described exhaust and the urea droplets pass through, further to increase
Add the broken and evaporation of the urea droplets.
2. engine exhaust as claimed in claim 1 post-processes mixing arrangement, it is characterised in that：Locate after the engine exhaust
Reason mixing arrangement includes housing, and the mounting seat is formed or is fixed on the housing；The urea nozzle is to described
The urea droplets of jet atomization in mixing tube.
3. engine exhaust as claimed in claim 2 post-processes mixing arrangement, it is characterised in that：The hybrid element also includes
The mixing tube periphery and the dividing plate in the housing are socketed in, the housing is divided into positioned at the side of the dividing plate
The first cavity and opposite side positioned at the dividing plate the second cavity, the spinning disk is connected with first cavity.
4. engine exhaust as claimed in claim 3 post-processes mixing arrangement, it is characterised in that：The mixing tube is additionally provided with position
In the top of the spinning disk and close to some perforation of the mounting seat.
5. engine exhaust as claimed in claim 3 post-processes mixing arrangement, it is characterised in that：The mixing tube is in hollow
Cylindrical shape, the dividing plate are vertical including the first vertical portion, the second vertical portion and connection first vertical portion and described second
The horizontal part in portion, wherein the horizontal part is provided with the perforate passed through for the mixing tube.
6. engine exhaust as claimed in claim 1 post-processes mixing arrangement, it is characterised in that：The fine fibre element is steel
Velvet or foam metal, the fine fibre element are located in the mixing tube.
7. engine exhaust as claimed in claim 6 post-processes mixing arrangement, it is characterised in that：Locate after the engine exhaust
Manage some hold-down bars that mixing arrangement is provided with the fixed fine fibre element.
8. a kind of exhaust post-treatment apparatus of engine, it includes the engine row as described in any one in claim 1 to 7
Gas post-processes mixing arrangement and the selective catalytic reducing agent positioned at the downstream of engine exhaust post processing mixing arrangement
(SCR)。
9. exhaust post-treatment apparatus of engine as claimed in claim 8, it is characterised in that：The engine exhaust post processing dress
Put the diesel oxidation catalyst (DOC) for also including post-processing the upstream of mixing arrangement positioned at the engine exhaust and being sequentially connected in series
And diesel particulate trap (DPF).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720925320.7U CN207178008U (en) | 2017-07-27 | 2017-07-27 | Engine exhaust post-processes mixing arrangement and its after-treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720925320.7U CN207178008U (en) | 2017-07-27 | 2017-07-27 | Engine exhaust post-processes mixing arrangement and its after-treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207178008U true CN207178008U (en) | 2018-04-03 |
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| CN201720925320.7U Active CN207178008U (en) | 2017-07-27 | 2017-07-27 | Engine exhaust post-processes mixing arrangement and its after-treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725733A (en) * | 2019-11-28 | 2020-01-24 | 广西玉柴机器股份有限公司 | Urea mixer of engine |
-
2017
- 2017-07-27 CN CN201720925320.7U patent/CN207178008U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725733A (en) * | 2019-11-28 | 2020-01-24 | 广西玉柴机器股份有限公司 | Urea mixer of engine |
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