CN206987931U - Engine exhaust post processing encapsulation - Google Patents
Engine exhaust post processing encapsulation Download PDFInfo
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- CN206987931U CN206987931U CN201720924780.8U CN201720924780U CN206987931U CN 206987931 U CN206987931 U CN 206987931U CN 201720924780 U CN201720924780 U CN 201720924780U CN 206987931 U CN206987931 U CN 206987931U
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- China
- Prior art keywords
- post processing
- engine exhaust
- exhaust post
- blender
- aftertreatment assembly
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Abstract
A kind of engine exhaust post processing encapsulation, it includes the first aftertreatment assembly, the first cavity components positioned at the downstream of first aftertreatment assembly and the mixing tube connected with first cavity components, wherein the mixing tube includes the first blender and to install the mounting seat of urea nozzle.The engine exhaust post processing encapsulation also includes the fine fibre element being located in 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.
Description
Technical field
A kind of engine exhaust post processing encapsulation is the utility model is related to, belongs to engine exhaust 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 encapsulation.
To achieve the above object, the utility model adopts the following technical scheme that：A kind of engine exhaust post processing encapsulation, its
Connected including the first aftertreatment assembly, positioned at the downstream of first aftertreatment assembly and with first aftertreatment assembly
One cavity components and the mixing tube connected with first cavity components, wherein the mixing tube include the first blender with
And to install the mounting seat of urea nozzle, the urea nozzle is to the urea solution of the first blender jet atomization
Drop, first blender include some plates being stacked, and the engine exhaust post processing encapsulation also includes being located at institute
The fine fibre element in mixing tube is stated, the fine fibre element is located at the downstream of first blender, wherein the fine fibre
Element is passed through with for the exhaust and the urea droplets, further to increase the broken of the urea droplets and steam
Hair.
As the further improved technical scheme of the utility model, each plate is provided with to the downstream of discharge directions and tilted
The rake of extension.
As the further improved technical scheme of the utility model, at least one in some plates is longer than other plates
Piece, the plate are stamped and formed out the breach of some lug bosses and the corresponding lug boss.
As the further improved technical scheme of the utility model, the mixing tube is provided with protrusion, the installation seat
In on the protrusion.
As the further improved technical scheme of the utility model, the mixing tube is included positioned at first blender
Second blender in downstream, the fine fibre element are located at the downstream of second blender.
As the further improved technical scheme of the utility model, the fine fibre element is steel wool or foam gold
Category.
As the further improved technical scheme of the utility model, the engine exhaust post processing encapsulation is provided with fixed institute
State some hold-down bars of fine fibre element.
As the further improved technical scheme of the utility model, the engine exhaust post processing encapsulation also includes and institute
State the second aftertreatment assembly that the first aftertreatment assembly is arranged side by side and positioned at the upstream of second aftertreatment assembly
Two cavity components, the mixing tube are connected between first cavity components and second cavity components；Described first
Aftertreatment assembly is with second aftertreatment assembly by first cavity components, the mixing tube and second cavity
Component realizes series connection.
As the further improved technical scheme of the utility model, first aftertreatment assembly is catalyzed including diesel oil oxidation
Agent and/or diesel particulate trap, second aftertreatment assembly include selective catalytic reducing agent.
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 engine exhaust post processing encapsulation.
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 schematic perspective view of mixing tube 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. 7.
Figure 10 is the diagrammatic cross-section of line B-B in Fig. 7.
Figure 11 is the three-dimensional exploded view of mixing tube in Fig. 6.
Embodiment
It please join shown in Fig. 3 to Figure 11, the utility model discloses a kind of engine exhaust post processing encapsulation 100, for example
To handle the tail gas of engine in such as SCR after-treatment systems.In the utility model embodiment illustrated, the engine
The first cavity components that exhaust aftertreatment encapsulation 100 includes the first aftertreatment assembly 1, connected with first aftertreatment assembly 1
2nd, the second aftertreatment assembly 3 for being arranged side by side with first aftertreatment assembly 1, connected with second aftertreatment assembly 3
The mixing tube 5 of second cavity components 4 and connection first, second cavity components 2,4.First aftertreatment assembly 1 with
Second aftertreatment assembly 3 realizes series connection by first, second cavity components 2,4 and the mixing tube 5.
In the utility model embodiment illustrated, first aftertreatment assembly 1 includes the first housing 11, second shell
Body 12, the oxidized form catalyst (DOC) being installed in first housing 11, being installed in second housing 12
Grain trap (DPF) and the exhaust gas intake port 15 positioned at the oxidized form catalyst upstream.Wherein, the oxidized form is urged
Change the upstream that converter is located at the grain catcher, to provide suitable temperature when the grain catcher regenerates.
In the utility model embodiment illustrated, second aftertreatment assembly 3 includes the 3rd housing 31, is installed on
Selective catalytic reducing agent (SCR) in 3rd housing 31 and the exhaust positioned at the selective catalytic reducing agent downstream
Outlet 33.
In the utility model embodiment illustrated, the shape of first cavity components 2 and second cavity components 4
Shape is roughly the same.First cavity components 2 by the exhaust from first aftertreatment assembly 1 being oriented to the mixing tube
5.Second cavity components 4 share the 3rd housing 31 with second aftertreatment assembly 3.
The mixing tube 5 includes the first blender 51, the second blender 52 positioned at the downstream of first blender 51
And to install the mounting seat 53 of urea nozzle (not shown).The urea nozzle to first blender 51 spraying
The urea droplets of atomization.
First blender 51 includes some plates 511 being stacked, and each plate 511 is provided with to discharge directions
Downstream tilt extension rake 512.At least one in some plates 511 is longer than other plates, the plate punching press
Breach 514 formed with some lug bosses 513 and the corresponding lug boss, in favor of crushing for urea granules.
The mixing tube 5 is provided with protrusion 54, and the mounting seat 53 is located on the protrusion 54.
In the utility model embodiment illustrated, by setting two-stage blender, so as to add mixing distance, drop
The low risk of urea crystals.Certainly, a blender can also be only set in other embodiments.
The engine exhaust post processing encapsulation 100 also includes the fine fibre element 6 being located in the mixing tube 5, wherein
The fine fibre element 6 is passed through with for the exhaust and the urea droplets, further to increase the urea droplets
Broken and evaporation.In the utility model embodiment illustrated, the fine fibre element 6 is steel wool or foam gold
Category, the fine fibre element 6 are located at the downstream of second blender 52.The engine exhaust post processing encapsulation 100 is provided with
Some hold-down bars 7 of the fixed fine fibre element 6.Certainly in other embodiments, the fine fibre element 6 can also be
Porous material of meshy steel wire or ceramics etc..
The utility model utilizes the 3D loose structures or multiple-void structure of fine fibre element 6 (such as steel wool), exhaust
And the urea droplets pass through the fine fibre element 6, 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 6
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 6 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 processing encapsulation, it includes the first aftertreatment assembly, positioned at first aftertreatment assembly
Downstream and the first cavity components connected with first aftertreatment assembly and the mixing connected with first cavity components
Pipe, wherein the mixing tube includes the first blender and to install the mounting seat of urea nozzle, the urea nozzle to
To the urea droplets of the first blender jet atomization, first blender includes some plates being stacked, and it is special
Sign is：The engine exhaust post processing encapsulation also includes the fine fibre element being located in the mixing tube, the fine fibre
Element is located at the downstream of first blender, wherein the fine fibre element is with for the exhaust and the urea droplets
Pass through, further to increase the broken and evaporation of the urea droplets.
2. engine exhaust post processing encapsulation as claimed in claim 1, it is characterised in that：Each plate is provided with to exhaust side
To downstream tilt extension rake.
3. engine exhaust post processing encapsulation as claimed in claim 1, it is characterised in that：At least one in some plates
Individual to be longer than other plates, the plate is stamped and formed out the breach of some lug bosses and the corresponding lug boss.
4. engine exhaust post processing encapsulation as claimed in claim 1, it is characterised in that：The mixing tube is provided with protrusion,
The mounting seat is located on the protrusion.
5. engine exhaust post processing encapsulation as claimed in claim 1, it is characterised in that：The mixing tube is included positioned at described
Second blender in the downstream of the first blender, the fine fibre element are located at the downstream of second blender.
6. engine exhaust post processing encapsulation as claimed in claim 1, it is characterised in that：The fine fibre element is steel wool
Or foam metal.
7. engine exhaust post processing encapsulation as claimed in claim 1, it is characterised in that：The engine exhaust post processing envelope
It is equiped with some hold-down bars of the fixed fine fibre element.
8. engine exhaust post processing encapsulation as claimed in claim 1, it is characterised in that：The engine exhaust post processing envelope
Dress also includes the second aftertreatment assembly being arranged side by side with first aftertreatment assembly and positioned at the second post processing group
Second cavity components of the upstream of part, the mixing tube be connected to first cavity components and second cavity components it
Between；First aftertreatment assembly and second aftertreatment assembly by first cavity components, the mixing tube and
Second cavity components realize series connection.
9. engine exhaust post processing encapsulation as claimed in claim 8, it is characterised in that：First aftertreatment assembly includes
Diesel oxidation catalyst and/or diesel particulate trap, second aftertreatment assembly include selective catalytic reducing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720924780.8U CN206987931U (en) | 2017-07-27 | 2017-07-27 | Engine exhaust post processing encapsulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720924780.8U CN206987931U (en) | 2017-07-27 | 2017-07-27 | Engine exhaust post processing encapsulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206987931U true CN206987931U (en) | 2018-02-09 |
Family
ID=61417405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720924780.8U Active CN206987931U (en) | 2017-07-27 | 2017-07-27 | Engine exhaust post processing encapsulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178413A (en) * | 2017-07-27 | 2017-09-19 | 天纳克（苏州）排放***有限公司 | Engine exhaust post processing encapsulation and application |
-
2017
- 2017-07-27 CN CN201720924780.8U patent/CN206987931U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178413A (en) * | 2017-07-27 | 2017-09-19 | 天纳克（苏州）排放***有限公司 | Engine exhaust post processing encapsulation and application |
| WO2019019723A1 (en) * | 2017-07-27 | 2019-01-31 | 天纳克（苏州）排放***有限公司 | Engine exhaust after-treatment package and application thereof |
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