CN207093184U - 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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- CN207093184U CN207093184U CN201720688867.XU CN201720688867U CN207093184U CN 207093184 U CN207093184 U CN 207093184U CN 201720688867 U CN201720688867 U CN 201720688867U CN 207093184 U CN207093184 U CN 207093184U
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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 the hybrid element positioned at the downstream of the mounting seat.The hybrid element is the urea droplets to be mixed with exhaust.The engine exhaust post processing mixing arrangement also includes the fine fibre element for being located at the downstream of the mounting seat along the flow direction of exhaust gases, 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 the mixing in the downstream installed the mounting seat of urea nozzle and be located at the mounting seat along flow direction of exhaust gases
Element, the urea nozzle are described to post-process the urea droplets of jet atomization in mixing arrangement to the engine exhaust
For hybrid element the urea droplets to be mixed with exhaust, the engine exhaust post processing mixing arrangement also includes edge
The flow direction of exhaust gases is located at the fine fibre element in the downstream of the mounting seat, wherein the fine fibre element is with for described
Exhaust 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 hybrid element includes mixing tube, the urea nozzle to
The urea droplets of jet atomization into the mixing tube.
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 part that the mixing tube is located in first cavity is provided with exhaust entrance.
As the further improved technical scheme of the utility model, the mixing tube is additionally provided with after described be vented
Upstream 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
Including rake and vertical portion, wherein the rake is provided with the perforate passed through for the mixing tube, the vertical portion reclines
On the outer wall of the mixing tube.
As the further improved technical scheme of the utility model, formed and be vented out between the mixing tube and the housing
Mouthful.
As the further improved technical scheme of the utility model, the fine fibre element is steel wool, the steel wool
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 steel wool.
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 right view.
Fig. 8 is Fig. 6 left 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 in Fig. 6 after housing.
Figure 13 is the schematic perspective view of fine fibre element in Figure 10.
Figure 14 is that fine fibre element of the present utility model applies the schematic diagram in other exhaust gas post-treatment devices.
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, wherein its be located at part in first cavity 110 be provided be vented into
Mouth 211, some perforation 212 positioned at the upstream of the exhaust entrance 211 and the close mounting seat 12.The exhaust entrance
211 are connected with the perforation 212 with first cavity 110.Exhaust is formed between the mixing tube 21 and the housing 1
Outlet 213.It please join shown in Fig. 9, in the utility model embodiment illustrated, bottom and the housing of the mixing tube 21
It is spaced a distance between 1, to form the air exit 213.Certainly, in other embodiments, the air exit
213 can also be arranged on the mixing tube 21 and positioned at the part of second cavity 120.In the reality of the utility model diagram
Apply in mode, the mixing tube 21 can form the mixed effect of double-cyclone, so as to add mixing distance, reduce urea knot
Brilliant risk.
The dividing plate 22 includes rake 221 and vertical portion 222, wherein the rake 221, which is provided with, supplies the mixing
The perforate 223 that pipe 21 passes through, the vertical portion 222 are abutted on the outer wall of the mixing tube 21.
It please join shown in Figure 13, in the utility model embodiment illustrated, the fine fibre element 3 is steel wool, institute
Steel wool is stated to be located in the mixing tube 21.The engine exhaust post processing mixing arrangement 10 is provided with the fixed steel wool
Some hold-down bars 4.Certainly in other embodiments, the fine fibre element 3 can also be meshy steel wire or ceramics it is more
Porous materials 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.Further, since the line footpath of steel wool is smaller, space is complicated, and heat transfer area is big, is advantageous to urea droplets and is sent out with exhaust
Raw relatively sufficiently heat exchange, so as to the evaporation and pyrolysis beneficial to urea droplets, improves Crystallization.By to fine fibre element
The regulation of 3 density can correspondingly adjust the back pressure of 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.
Please join shown in Figure 14, fine fibre element 3 of the present utility model can also be arranged on hybrid element 2 upstream or under
Trip, the hybrid element 2 are located at the downstream of urea nozzle (shown in ginseng dotted line) with fine fibre element 3, can equally realize this reality
With new purpose.The hybrid element 2 includes but is not limited to the existing mixing in the prior art such as blender, mixing tube
Structure.In addition, the hybrid element 2 can be located in blast pipe or be integrated in exhaust post-treatment apparatus of engine.
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 (10)
1. a kind of engine exhaust post-processes mixing arrangement, it includes installing the mounting seat of urea nozzle and along exhaust stream
Dynamic direction is located at the hybrid element in the downstream of the mounting seat, and the urea nozzle is mixed to be post-processed to the engine exhaust
The urea droplets for putting middle jet atomization are attached together, for the hybrid element the urea droplets to be mixed with exhaust, it is special
Sign is：The engine exhaust post processing mixing arrangement also includes being located under the mounting seat along the flow direction of exhaust gases
The fine fibre element of trip, wherein the fine fibre element is passed through with for the exhaust and the urea droplets, with further
Increase 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 hybrid element includes mixing tube,
The urea nozzle to urea droplets from the jet atomization to the 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 mixing tube is located at the portion in first cavity
It is arranged with exhaust entrance.
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
Some perforation of upstream and the close mounting seat after described be vented.
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 include rake and vertical portion, wherein the rake is provided with the perforate passed through for the mixing tube,
The vertical portion is abutted on the outer wall of the mixing tube.
6. engine exhaust as claimed in claim 2 post-processes mixing arrangement, it is characterised in that：The mixing tube and the shell
Air exit is formed between body.
7. engine exhaust as claimed in claim 3 post-processes mixing arrangement, it is characterised in that：The fine fibre element is steel
Velvet, the steel wool are located in the mixing tube.
8. engine exhaust as claimed in claim 7 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 steel wool.
9. a kind of exhaust post-treatment apparatus of engine, it includes the engine row as described in any one in claim 1 to 8
Gas post-processes mixing arrangement and the selective catalytic reducing agent positioned at the downstream of engine exhaust post processing mixing arrangement
(SCR)。
10. exhaust post-treatment apparatus of engine as claimed in claim 9, it is characterised in that：The engine exhaust post processing
Device also includes the diesel oxidation catalyst for post-processing the upstream of mixing arrangement positioned at the engine exhaust and being sequentially connected in series
And diesel particulate trap (DPF) (DOC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720688867.XU CN207093184U (en) | 2017-06-14 | 2017-06-14 | Engine exhaust post-processes mixing arrangement and its after-treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720688867.XU CN207093184U (en) | 2017-06-14 | 2017-06-14 | Engine exhaust post-processes mixing arrangement and its after-treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207093184U true CN207093184U (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720688867.XU Active CN207093184U (en) | 2017-06-14 | 2017-06-14 | 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 |
|---|---|---|---|---|
| WO2018228085A1 (en) * | 2017-06-14 | 2018-12-20 | 天纳克（苏州）排放系统有限公司 | Engine exhaust post-processing mixing device, and post-processing device and application thereof |
-
2017
- 2017-06-14 CN CN201720688867.XU patent/CN207093184U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018228085A1 (en) * | 2017-06-14 | 2018-12-20 | 天纳克（苏州）排放系统有限公司 | Engine exhaust post-processing mixing device, and post-processing device and application thereof |
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