CN207178006U - 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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- CN207178006U CN207178006U CN201720925126.9U CN201720925126U CN207178006U CN 207178006 U CN207178006 U CN 207178006U CN 201720925126 U CN201720925126 U CN 201720925126U CN 207178006 U CN207178006 U CN 207178006U
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- mixing arrangement
- engine exhaust
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- eddy flow
- flow tray
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Abstract
A kind of engine exhaust post-processes mixing arrangement, and it includes housing, the first eddy flow tray for being installed in the housing, the second eddy flow tray and to install the mounting seat of urea nozzle.Hybrid chamber is formed between first eddy flow tray and second eddy flow tray.The engine exhaust post processing mixing arrangement also includes the fine fibre element being located in the hybrid chamber, 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 housing, the first eddy flow tray for being installed in the housing, be installed in the housing and with first eddy flow tray
Spaced second eddy flow tray and to install the mounting seat of urea nozzle, first eddy flow tray and the described second rotation
Form hybrid chamber between flow table, the urea nozzle to urea droplets from the jet atomization to the hybrid chamber, described first
Provided with being open exhaust is directed into the first of swirling eddy, second eddy flow tray is provided with will be vented with urinating eddy flow tray
The mixed airflow of plain drop is directed to the second opening of swirling eddy, and the engine exhaust post processing mixing arrangement also includes position
Fine fibre element in the hybrid chamber, wherein the fine fibre element is worn with for the exhaust and the urea droplets
Cross, 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 is included extremely
The cylinder that small part is extended into the hybrid chamber, the cylinder be provided with the first perforate of first open communication and with
Second perforate of second open communication.
As the further improved technical scheme of the utility model, first perforate is relative with second perforate to be set
Put.
As the further improved technical scheme of the utility model, the cylinder is provided with the bottom wall positioned at bottom so that gas
Stream can only enter from the first perforate and be flowed out from the second perforate.
As the further improved technical scheme of the utility model, the fine fibre element is covered in second perforate
On.
As the further improved technical scheme of the utility model, the fine fibre element is steel wool or foam metal.
As the further improved technical scheme of the utility model, the engine exhaust post processing mixing arrangement is provided with solid
The hold-down bars of the fixed fine fibre element.
As the further improved technical scheme of the utility model, first eddy flow tray and/or second eddy flow tray
Provided with adjusting the perforation of back pressure.
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.
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 schematic perspective view of engine exhaust post processing mixing arrangement in Fig. 4.
Fig. 6 is to remove the stereogram in Fig. 5 after housing.
Fig. 7 is the schematic diagram for showing fine fibre element in Fig. 6.
Fig. 8 is the diagrammatic cross-section of the line A-A along Fig. 5.
Fig. 9 is Fig. 5 left view.
Figure 10 is Fig. 5 right view.
Figure 11 is the three-dimensional exploded view of engine exhaust post processing mixing arrangement in Fig. 5.
Figure 12 is the three-dimensional exploded view of another angles of Figure 11.
Embodiment
It please join shown in Fig. 3 to Figure 12, 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, positioned at the engine exhaust post processing mixing arrangement 10 upstream post processing carrier 30 as one kind and
Selective catalytic reducing agent (SCR) 40 positioned at the downstream of engine exhaust post processing mixing arrangement 10.
The engine exhaust post processing mixing arrangement 10 includes housing 1, the first eddy flow tray being installed in the housing 1
2nd, it is installed in the housing 1 and second eddy flow tray 3 spaced with first eddy flow tray 2 and to install urea
The mounting seat 4 of nozzle (not shown).
In the utility model embodiment illustrated, the housing 1 is cylindrical.First eddy flow tray 2 with it is described
Hybrid chamber 20 is formed between second eddy flow tray 3.The urea nozzle into the hybrid chamber 20 directly or indirectly spraying
The urea droplets of atomization.
First eddy flow tray 2 is provided with will be vented the first opening 21 for being directed to swirling eddy.Second eddy flow
Disk 3 is provided with will be vented the second opening 31 that swirling eddy is directed to the mixed airflow of urea droplets.First eddy flow
Disk 2 and/or second eddy flow tray 3 are provided with to adjust the perforation 32 of back pressure.
The engine exhaust post processing mixing arrangement 10 also includes the fine fibre element 5 being located in the hybrid chamber 20,
Wherein described fine fibre element 5 is passed through with for the exhaust and the urea droplets, further to increase the urea solution
The broken and evaporation of drop.
In the utility model embodiment illustrated, the engine exhaust post processing mixing arrangement 10 includes at least portion
Divide the cylinder 6 extended into the hybrid chamber 20.The cylinder 6 be provided with described first opening 21 connect the first perforates 61,
The second perforate 62 connected with the described second opening 31 and the bottom wall 63 positioned at bottom.Wherein, first perforate 61 and institute
The second perforate 62 is stated to be oppositely arranged.The bottom wall 63 causes air-flow to enter from the first perforate 61 and flowed from the second perforate 62
Go out.
The fine fibre element 5 is covered in second perforate 62.In the utility model embodiment illustrated, institute
It is steel wool or foam metal to state fine fibre element 5.Certainly in other embodiments, the fine fibre element 5 can also
It is porous material of meshy steel wire or ceramics etc..The engine exhaust post processing mixing arrangement 10 is provided with fixed described thin fine
Tie up the hold-down bars 7 of element 5.
The utility model utilizes the 3D loose structures or multiple-void structure of fine fibre element 5 (such as steel wool), exhaust
And the urea droplets pass through the fine fibre element 5, 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 5
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 5 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 housing, the first eddy flow tray for being installed in the housing, pacifies
Loaded in the housing and the second eddy flow tray spaced with first eddy flow tray and to install the peace of urea nozzle
Seat is filled, forms hybrid chamber between first eddy flow tray and second eddy flow tray, the urea nozzle is to the mixing
The urea droplets of jet atomization in chamber, first eddy flow tray are provided with will be vented the first opening for being directed to swirling eddy,
Second eddy flow tray is provided with will be vented the second opening that swirling eddy is directed to the mixed airflow of urea droplets, and it is special
Sign is：The engine exhaust post processing mixing arrangement also includes the fine fibre element being located in the hybrid chamber, wherein institute
Fine fibre element is stated with so that the exhaust and the urea droplets pass through, further to increase the broken of the urea droplets
And evaporation.
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 extending at least partially into the cylinder in the hybrid chamber, and the cylinder is provided with and first open communication
The first perforate and the second perforate with second open communication.
3. engine exhaust as claimed in claim 2 post-processes mixing arrangement, it is characterised in that：First perforate with it is described
Second perforate is oppositely arranged.
4. engine exhaust as claimed in claim 2 post-processes mixing arrangement, it is characterised in that：The cylinder, which is provided with, is located at bottom
The bottom wall in portion so that air-flow can only enter from the first perforate and be flowed out from the second perforate.
5. engine exhaust as claimed in claim 2 post-processes mixing arrangement, it is characterised in that：The fine fibre element covers
In second perforate.
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.
7. engine exhaust as claimed in claim 6 post-processes mixing arrangement, it is characterised in that：Locate after the engine exhaust
Manage the hold-down bars that mixing arrangement is provided with the fixed fine fibre element.
8. engine exhaust as claimed in claim 1 post-processes mixing arrangement, it is characterised in that：First eddy flow tray and/
Or second eddy flow tray is provided with to adjust the perforation of back pressure.
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)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720925126.9U CN207178006U (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 |
|---|---|---|---|
| CN201720925126.9U CN207178006U (en) | 2017-07-27 | 2017-07-27 | Engine exhaust post-processes mixing arrangement and its after-treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207178006U true CN207178006U (en) | 2018-04-03 |
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ID=61743890
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720925126.9U Active CN207178006U (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 |
|---|---|---|---|---|
| CN107165707A (en) * | 2017-07-27 | 2017-09-15 | 天纳克（苏州）排放系统有限公司 | Engine exhaust post-processes mixing arrangement and its after-treatment device and application |
-
2017
- 2017-07-27 CN CN201720925126.9U patent/CN207178006U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165707A (en) * | 2017-07-27 | 2017-09-15 | 天纳克（苏州）排放系统有限公司 | Engine exhaust post-processes mixing arrangement and its after-treatment device and application |
| WO2019019721A1 (en) * | 2017-07-27 | 2019-01-31 | 天纳克（苏州）排放系统有限公司 | Engine exhaust after-treatment mixing device, after-treatment device comprising same, and application thereof |
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