CN206144635U - Processing apparatus after integrated injection formula of SCR - Google Patents
Processing apparatus after integrated injection formula of SCR Download PDFInfo
- Publication number
- CN206144635U CN206144635U CN201621177800.1U CN201621177800U CN206144635U CN 206144635 U CN206144635 U CN 206144635U CN 201621177800 U CN201621177800 U CN 201621177800U CN 206144635 U CN206144635 U CN 206144635U
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- China
- Prior art keywords
- carbamide
- urea
- pipe
- cylinder body
- outer cylinder
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model relates to a processing apparatus after integrated injection formula of SCR, including urea mixing arrangement and aftertreatment assembly, urea mixing arrangement includes the urea hybrid chamber, the upper end of urea hybrid chamber is provided with the intake pipe, the rear end of intake pipe is connected with the mechanical tubes, be provided with the urea sprayer on the lateral wall of mechanical tubes, the lower extreme of mechanical tubes is connected with spinning throat pipe, the rear end of spinning throat pipe is provided with expansion hole pipe, the bottom of expansion hole pipe is provided with the trompil blanking cover, the rear end of the mixed cavity of urea is provided with toper mixed plate, carrier urceolus body coupling is in the rear end of urea hybrid chamber, parallel arrangement has a plurality of catalyst support in the outer barrel of carrier, the rear end of the outer barrel of carrier is provided with the outlet duct. The utility model discloses simple structure, the design is compact, improve the air current to the urea liquid membrane sweep effect and ureal decomposition speed, improve NH3 simultaneously and in the even branch nature of the distribution of SCR catalyst terminal surface, has reduced the urea crystallization risk, the catalytic conversion who improves waste gas is rateed.
Description
Technical field
This utility model is related to a kind of integrated injecting type after-treatment devices of SCR, belongs to engine exhaust gas processing unit technology
Field.
Background technology
Engines tail gas disposal is frequently with SCR technology.The ultimate principle of SCR technology is sprayed in aerofluxuss
Penetrate fuel oil or add other reducing agents, select suitable catalyst, promote reducing agent to react with NOx, while suppressing reducing agent
By the dioxygen oxidation in aerofluxuss.Main flow SCR technology decomposes the NH for producing with carbamide at present3As reducing agent.
The deposits such as urea crystals calculus is generated when diesel vehicle is run under low loading conditions easily, the problem is always shadow
Ring the principal element of vehicle stabilization operation.In vehicle operation, due to carbamide atomization badness, mix uneven or decomposition not
Fully, the urea droplets sprayed are caused to be converted into NH in real time3, but production by-product, cause reduction reaction unstable.From
And have influence on the concordance and transformation efficiency of NOx emission.Due to much bigger than gas of urea droplets quality, therefore in air current flow
Stagnation region remains the crystallization to be formed, if can not decompose completely in time, can constantly grow as protokaryon, ultimately form
Urea crystals calculus, accumulation are possible to block carbamide flow channel to a certain extent.Therefore the mixing and decomposition of carbamide are promoted
One of principal element of SCR system efficiency is affected always.
The content of the invention
The purpose of this utility model is to solve the above problems, there is provided a kind of simple structure, SCR collection compact to design
Into injecting type after-treatment device.
This utility model is adopted the following technical scheme that：A kind of integrated injecting type after-treatment device of SCR, including carbamide mixing dress
Put and post processing assembly, the rear end of the urea mixing device is vertically connected with post processing assembly, the urea mixing device bag
Carbamide hybrid chamber is included, the upper end of the carbamide hybrid chamber is provided with air inlet pipe, and the lower end of the air inlet pipe is connected with shape tube, institute
State and on the side wall of shape tube, be provided with carbamide injection base, on the carbamide injection base, be provided with urea injector, it is described different
The lower end of type pipe is connected with spinning necking pipe, and the lower end of the spinning necking pipe is provided with expanded bore pipe, the expanded bore pipe
Bottom is provided with blanking cover, and the rear end of the mixing chamber is provided with taper mixed plate, and the post processing assembly includes carrier outer tube
Body, catalyst carrier, dividing plate, escape pipe, the carrier outer cylinder body are connected to the rear end of carbamide hybrid chamber, the carrier outer cylinder body
In be arranged with several catalyst carriers in parallel, the rear end of the carrier outer cylinder body is provided with dividing plate, and the dividing plate side is arranged
The end for having escape pipe, the escape pipe is provided with outlet end cap.
Further, the carbamide hybrid chamber includes inner barrel and outer cylinder body two-layer, in the inner barrel and outer cylinder body
Between be provided with heat insulation foam layer.
Further, liner is provided between the upper wall of the catalyst carrier and carrier outer cylinder body.
Further, noise elimination cavity outer cylinder body is provided with the outside of the carrier outer cylinder body.
Further, the front end of the escape pipe is connected with hush tube.
Further, the bottom of the perforate blanking cover is provided with several strip holes.
Further, one end of the carbamide hybrid chamber is provided with double-deck end cap, is provided with heat-insulated between the double-deck end cap
Cotton layer.
This utility model simple structure, it is compact to design, it is easy to use, improve purging effect of the air-flow to carbamide liquid film, solution
Certainly easily occur the problem of urea deposit in prior art in carbamide blender, improve the decomposition rate of carbamide, while improving
A be evenly distributed point property of the NH3 in SCR catalyst end face, reduces urea crystals risk, and can reduce temperature in processor
Loss, improves the catalytic conversion of waste gas.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Reference：Urea mixing device 1, post processing assembly 2, carbamide hybrid chamber 3, air inlet pipe 4, the spray of shape tube 5, carbamide
Penetrate base 6, spinning necking pipe 7, expanded bore pipe 8, perforate blanking cover 9, double-deck end cap 10, taper mixed plate 11, carrier outer cylinder body 12,
Catalyst carrier 13, liner 14, dividing plate 15, hush tube 16, escape pipe 17, outlet end cap 18, noise elimination cavity outer cylinder body 19.
Specific embodiment
Below in conjunction with accompanying drawing, the utility model will be further described.
As shown in figure 1, a kind of integrated injecting type after-treatment device of SCR, including urea mixing device 1 and post processing assembly 2,
The rear end of urea mixing device 1 is vertically connected with post processing assembly 2, and urea mixing device 1 includes carbamide hybrid chamber 3, and carbamide is mixed
Closing chamber 3 includes that inner barrel and the middle setting of outer cylinder body two-layer, inner barrel and outer cylinder body have heat insulation foam layer, carbamide hybrid chamber 3
One end is provided with double-deck end cap 10, and heat insulation foam layer is provided between double-deck end cap 10, and the upper end of carbamide hybrid chamber 3 is provided with air inlet pipe
4, the lower end of air inlet pipe 4 is connected with shape tube 5, and carbamide injection base 6, carbamide injection base 6 are provided with the side wall of shape tube 5
On be provided with urea injector, the lower end of shape tube 5 is connected with spinning necking pipe 7, expanded bore pipe is provided with spinning necking pipe 7
8, the bottom of expanded bore pipe 8 is provided with perforate blanking cover 9, and the rear end of carbamide hybrid chamber 3 is provided with taper mixed plate 11, and post processing is total
Include carrier outer cylinder body 12, catalyst carrier 13, dividing plate 15, escape pipe 17 into 2, carrier outer cylinder body 12 is connected to carbamide hybrid chamber
3 rear end, is arranged with several catalyst carriers 13, catalyst carrier 13 and carrier outer cylinder body 12 in parallel in carrier outer cylinder body 12
Upper wall between be provided with liner 14, the rear end of carrier outer cylinder body 12 is provided with dividing plate 15, and 15 side of dividing plate is provided with escape pipe 17,
The end of escape pipe 17 is provided with outlet end cap 18, and the outside of carrier outer cylinder body 12 is provided with noise elimination cavity outer cylinder body 19, escape pipe
17 front end is connected with hush tube 16.
Operation principle：
When the waste gas that electromotor is produced flows through urea mixing device 1 of the present utility model, special pipe is entered by air inlet pipe 4
5, carbamide injection apparatus realize that in special pipe 5 carbamide sprays, and carbamide enters spinning necking pipe 7, spinning contracting with waste gas stream
In mouth pipe 7, exhaust flow velocity increases, while strengthen waste gas stream acting on the purging of carbamide liquid film so that carbamide rapidly enters expansion
In hole pipe 8, expanded bore pipe 8 and perforate blanking cover 9 are welded into one, and a part of carbamide and waste gas stream can realize gas by this structure
Stream is turned back, and a part realizes diffusion by the perforate on expanded bore pipe 8, and also part urea granules will be as gas shock be to opening
Blanking cover 9 bottom in hole simultaneously wall formation liquid film in bottom, devises strip hole to guide air-flow be deposited on bottom on perforate blanking cover 9
The urea granules blowout in portion；
As Urea Evaporation is acted on, 3 wall surface temperature of carbamide hybrid chamber will decrease, in order to prevent temperature loss excessive,
3 cylinder of carbamide hybrid chamber adopts the double-layer barrel form of inner barrel and outer cylinder body, and outer cylinder body and inner barrel central filler to have
Heat insulation foam layer, greatly prevents the reduction of temperature, the double-deck end cap 10 of the other end setting of carbamide mixing chamber 3, and bilayer
It is provided with heat insulation foam layer can also play a part of to reduce temperature loss between end cap 10.
In order to improve NH3In the distributing homogeneity of catalyst carrier end face, increase taper mixed plate after carbamide hybrid chamber 3
11, air-flow can be concentrated to central area and realize further mixing and the carbamide of air-flow and carbamide by taper mixed plate 11
Further decomposition.Carbamide is decomposed into NH3Afterwards, the catalyst carrier 13 being set up in parallel is sequentially entered, and completes reduction reaction, turned
The waste gas that completes of change will further pass through dividing plate 15, hush tube 16 and escape pipe 17 discharges post processing assembly and enters air.
Claims (7)
1. integrated injecting type after-treatment devices of a kind of SCR, it is characterised in that：Including urea mixing device（1）With post processing assembly
（2）, the urea mixing device（1）Rear end be vertically connected with post processing assembly（2）, the urea mixing device（1）Including
Carbamide hybrid chamber（3）, the carbamide hybrid chamber（3）Upper end be provided with air inlet pipe（4）, the air inlet pipe（4）Lower end connection
There is shape tube（5）, the shape tube（5）Side wall on be provided with carbamide injection base（6）, the carbamide injection base（6）On
It is provided with urea injector, the shape tube（5）Lower end be connected with spinning necking pipe（7）, the spinning necking pipe（7）Under
End is provided with expanded bore pipe（8）, the expanded bore pipe（8）Bottom be provided with perforate blanking cover（9）, the carbamide hybrid chamber（3）
Rear end be provided with taper mixed plate（11）, the post processing assembly（2）Including carrier outer cylinder body（12）, catalyst carrier
（13）, dividing plate（15）, escape pipe（17）, the carrier outer cylinder body（12）It is connected to carbamide hybrid chamber（3）Rear end, the carrier
Outer cylinder body（12）In be arranged with several catalyst carriers in parallel（13）, the carrier outer cylinder body（12）Rear end be provided with dividing plate
（15）, the dividing plate（15）Side is provided with escape pipe（17）, the escape pipe（17）End be provided with outlet end cap（18）.
2. integrated injecting type after-treatment devices of SCR as claimed in claim 1, it is characterised in that：Carbamide hybrid chamber（3）Including interior
The middle setting of cylinder and outer cylinder body two-layer, the inner barrel and outer cylinder body has heat insulation foam layer.
3. integrated injecting type after-treatment devices of SCR as claimed in claim 1, it is characterised in that：The catalyst carrier（13）
With carrier outer cylinder body（12）Upper wall between be provided with liner（13）.
4. integrated injecting type after-treatment devices of SCR as claimed in claim 1, it is characterised in that：The carrier outer cylinder body（12）
Outside be provided with noise elimination cavity outer cylinder body（19）.
5. integrated injecting type after-treatment devices of SCR as claimed in claim 1, it is characterised in that：The escape pipe（17）Before
End is connected with hush tube（16）.
6. integrated injecting type after-treatment devices of SCR as claimed in claim 1, it is characterised in that：The perforate blanking cover（9）Bottom
Portion is provided with several strip holes.
7. integrated injecting type after-treatment devices of SCR as claimed in claim 1, it is characterised in that：The carbamide hybrid chamber（3）'s
One end is provided with double-deck end cap（10）, the double-deck end cap（10）Between be provided with heat insulation foam layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621177800.1U CN206144635U (en) | 2016-11-03 | 2016-11-03 | Processing apparatus after integrated injection formula of SCR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621177800.1U CN206144635U (en) | 2016-11-03 | 2016-11-03 | Processing apparatus after integrated injection formula of SCR |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206144635U true CN206144635U (en) | 2017-05-03 |
Family
ID=58624247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621177800.1U Active CN206144635U (en) | 2016-11-03 | 2016-11-03 | Processing apparatus after integrated injection formula of SCR |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206144635U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968765A (en) * | 2017-05-04 | 2017-07-21 | 安徽江淮汽车集团股份有限公司 | A kind of diesel urea mixing arrangement |
| CN107178412A (en) * | 2017-06-29 | 2017-09-19 | 杭州银轮科技有限公司 | Cartridge type SCR encapsulation inlet end assemblies are entered in side |
| CN108894859A (en) * | 2018-07-25 | 2018-11-27 | 汽解放汽车有限公司 | A kind of cylinder type integrates the post-processor assembly of detachable urea nozzle |
| CN109505686A (en) * | 2019-01-28 | 2019-03-22 | 凯龙高科技股份有限公司 | A kind of urea injection mixed cell for diesel engine vent gas post-processing |
| CN110836137A (en) * | 2019-07-30 | 2020-02-25 | 万向通达股份公司 | Vehicle post processor |
| CN111271161A (en) * | 2020-03-25 | 2020-06-12 | 无锡威孚力达催化净化器有限责任公司 | Half slot hole tubular urea mixing arrangement |
-
2016
- 2016-11-03 CN CN201621177800.1U patent/CN206144635U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968765A (en) * | 2017-05-04 | 2017-07-21 | 安徽江淮汽车集团股份有限公司 | A kind of diesel urea mixing arrangement |
| CN107178412A (en) * | 2017-06-29 | 2017-09-19 | 杭州银轮科技有限公司 | Cartridge type SCR encapsulation inlet end assemblies are entered in side |
| CN107178412B (en) * | 2017-06-29 | 2023-09-05 | 杭州银轮科技有限公司 | Side-feeding cylinder type SCR packaging air inlet end assembly |
| CN108894859A (en) * | 2018-07-25 | 2018-11-27 | 汽解放汽车有限公司 | A kind of cylinder type integrates the post-processor assembly of detachable urea nozzle |
| CN108894859B (en) * | 2018-07-25 | 2023-10-24 | 一汽解放汽车有限公司 | Post-processor assembly of cylindrical integrated detachable urea nozzle |
| CN109505686A (en) * | 2019-01-28 | 2019-03-22 | 凯龙高科技股份有限公司 | A kind of urea injection mixed cell for diesel engine vent gas post-processing |
| CN110836137A (en) * | 2019-07-30 | 2020-02-25 | 万向通达股份公司 | Vehicle post processor |
| CN111271161A (en) * | 2020-03-25 | 2020-06-12 | 无锡威孚力达催化净化器有限责任公司 | Half slot hole tubular urea mixing arrangement |
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