CN104594990B - Mixing tube and its exhaust gas treatment device - Google Patents
Mixing tube and its exhaust gas treatment device Download PDFInfo
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- CN104594990B CN104594990B CN201510089958.7A CN201510089958A CN104594990B CN 104594990 B CN104594990 B CN 104594990B CN 201510089958 A CN201510089958 A CN 201510089958A CN 104594990 B CN104594990 B CN 104594990B
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Abstract
A kind of mixing tube, for in engine exhaust treatment apparatus, it includes the first semi-circular tube and the second semi-circular tube that cooperate, first semi-circular tube and second semi-circular tube diametrically mutually stagger to form first outlet and second outlet on circumference, and the first outlet is opposite with the opening direction of the second outlet forming eddy flow.Mixing tube simple structure of the invention, eddy flow can also rotate after blending space is entered, and increased stroke of the air-flow in the confined space, to increase the distance of urea droplets evaporation, improve evaporation rate, improve the uniformity of mixing.The invention further relates to a kind of exhaust gas treatment device with the mixing tube.
Description
Technical field
The present invention relates to a kind of mixing tube and its exhaust gas treatment device, belong to engine exhaust post-processing technology field.
Background technology
Research shows exhaust after treatment system（Such as selective catalytic reduction system operating, SCR system）Ammonia distribution in pipeline
Uniformity coefficient has important influence to the overall performance and endurance quality of system.If ammonia skewness can cause regional area
Ammonia is excessive so as to easily cause NH_3 leakage, and causes oxynitrides in other ammonia thin areas（NOx）Transformation efficiency is too low.It is long
The uneven distribution of time ammonia can cause catalyst aging uneven, so as to influence the overall performance of catalyst.In addition, urea solution
The uneven distribution of drop can cause local tube wall or mixed structure temperature too low, form crystallization, blast pipe can be blocked when serious, is led
Engine power performance is caused to decline.
Therefore, it is necessary to a kind of new mixing tube and its exhaust gas treatment device with the mixing tube are provided, to solve
Above-mentioned technical problem.
The content of the invention
It is an object of the invention to provide a kind of simple structure and well mixed mixing tube and with the mixing tube
Exhaust gas treatment device.
To achieve the above object, the present invention is adopted the following technical scheme that：A kind of mixing tube, fills for engine exhaust treatment
In putting, it includes the first semi-circular tube and the second semi-circular tube that cooperate, first semi-circular tube and second semi-circular tube
Diametrically mutually stagger to form first outlet and second outlet on circumference；First semi-circular tube include first end face,
The second end face relative with the first end face and the first space between first, second end face；Described second
Semi-circular tube includes the 3rd end face fourth end face relative with the 3rd end face and between the three, the 4th end face
Second space；First space connects to form the blending space of the mixing tube, the mixing with the second space
Space connects with the first outlet and the second outlet；The first end face is located at described mixed with the 3rd end face
The side of pipe is closed to form air inlet, the second end face is located at the opposite side of the mixing tube with the 4th end face, is used in combination
To be blocked；The first outlet is opposite with the opening direction of the second outlet forming eddy flow.
Used as further improved technical scheme of the present invention, first semi-circular tube includes the first end respectively positioned at both sides
End and second end；Second semi-circular tube includes the 3rd end and the 4th end respectively positioned at both sides；Described first
End is located between the first end and the 3rd end near the 3rd end, the first outlet；Described second
End is located between the second end and the 4th end near the 4th end, the second outlet.
Used as further improved technical scheme of the present invention, the second end is located at the inner side of the 4th end, and
The second end is extended partially into the second space；3rd end is located at the inner side of the first end, and institute
The 3rd end section is stated to extend into first space.
Used as further improved technical scheme of the present invention, first semi-circular tube is located at the top of the mixing tube, institute
The second semi-circular tube is stated positioned at the bottom of the mixing tube.
As further improved technical scheme of the present invention, the radius of first semi-circular tube and second semi-circular tube
Radius is identical.
Used as further improved technical scheme of the present invention, first semi-circular tube is by same with second semi-circular tube
The cutting of root cylindrical tube.
Present invention also offers a kind of exhaust gas treatment device, it include housing be installed in the housing it is some every
Plate, some dividing plates include the first dividing plate and second partition, and the housing includes the positioned at the first dividing plate upstream
One cavity, the second cavity between first dividing plate and the second partition and positioned at the second partition downstream
The 3rd cavity, wherein the exhaust gas treatment device also include blender in first cavity, positioned at described second
Mixing tube in cavity and the SCR module positioned at the 3rd cavity downstream, the blender are mixed with described
Close pipe to be connected, the mixing tube is above-mentioned mixing tube.
Used as further improved technical scheme of the present invention, the blender is in hollow cylindrical shape, is set on its circumference
There are some openings of some outside flange and corresponding these flange, the flange is in tilted layout with when exhaust from the opening
Into eddy flow can be formed during the blender；The blender is provided with internally positioned hybrid chamber, the hybrid chamber with it is described
Open communication, the exhaust gas treatment device also includes installing on the housing and to be sprayed in the hybrid chamber vertically
The nozzle of urea liquid.
Used as further improved technical scheme of the present invention, first dividing plate is not provided with the periphery of the blender
Perforation；The second partition is provided with some perforation in the periphery of the mixing tube, and these perforation are connected with the 3rd cavity；
The second partition lives the second end face and the 4th end face seal so that the exhaust for entering the mixing tube can only
Left with the second outlet from the first outlet.
Used as further improved technical scheme of the present invention, the housing is provided with exhaust entrance, the mixing in its end
Device mutually staggers in the axial direction with the exhaust entrance, and the blender is mutually aligned with the mixing tube on the axial direction.
Compared to prior art, mixing tube of the invention includes the first semi-circular tube and the second semi-circular tube that cooperate,
Simple structure；First semi-circular tube and the second semi-circular tube diametrically mutually stagger to form first outlet and the on circumference
Two outlets, the first outlet is opposite with the opening direction of the second outlet to form eddy flow, and this eddy flow is entering mixing sky
Between after can also rotate, therefore increased stroke of the air-flow in the confined space, to increase the distance of urea droplets evaporation, improve
Evaporation rate, improves the uniformity of mixing, reduces the risk of urea crystals.
Brief description of the drawings
Fig. 1 is the schematic perspective view of exhaust gas treatment device of the present invention.
Fig. 2 is the part isometric exploded view of Fig. 1, wherein first reactor is separated.
Fig. 3 is the part isometric exploded view after end housing after Fig. 2 is removed.
Fig. 4 is the stereogram of mixed structure of the present invention.
Fig. 5 is the three-dimensional exploded view of Fig. 4.
Fig. 6 is the three-dimensional exploded view of another angles of Fig. 5.
Fig. 7 is the stereogram of blender in Fig. 6.
Fig. 8 is the front view of Fig. 7, and has gone out the direction of rotation of air-flow with arrows.
Fig. 9 is the stereogram of mixing tube in Fig. 6.
Figure 10 is the front view of Fig. 9.
Figure 11 is identical with the angle of Figure 10, and has gone out the direction of rotation of air-flow with arrows.
Specific embodiment
Please join shown in Fig. 1 to Fig. 6, present invention is disclosed a kind of exhaust gas treatment device 100, be used to process the row of engine
Gas.The exhaust gas treatment device 100 includes first reactor 1, mixed structure 2, the reactor 4 of second reactor 3 and the 3rd.
In illustrative embodiments of the present invention, the first reactor 1, the second reactor 3 are with the 3rd reactor 4 in exhaust
Flow direction on be arranged in order.Also, functionally, the first reactor 1 is oxidation catalyzer（DOC）, described second
Reactor 3 is selective oxidation catalytic module（SCR）, the 3rd reactor 4 be NH_3 leakage photocatalyst module（ASC）.It is affiliated
Those skilled in the art are appreciated that above-mentioned first, second, third reactor 1,3,4 can be designed according to actual needs
It is other kinds of catalyst converter or combination, will not be repeated here.
Please join shown in Fig. 3 to Fig. 6, the mixed structure 2 includes housing 21, some dividing plates being installed in the housing 21
22nd, the blender 23 and mixing tube 24 in the housing 21.In illustrative embodiments of the present invention, the housing 21
In cylindrical shape, it includes the exhaust entrance 210 connected with the first reactor 1.The housing 21 also includes being located at side
End plate 211.Some dividing plates 22 include the first dividing plate 221 and second partition 222.Please join shown in Fig. 3, the housing 21
Including the first cavity 251 positioned at the upstream of the first dividing plate 221, positioned at first dividing plate 221 and the second partition 222
Between the second cavity 252 and the 3rd cavity 253 positioned at the downstream of the second partition 222.The blender 23 is located at institute
State in the first cavity 251 and erection is fixed between the end plate 211 and first dividing plate 221.The mixing tube 24 is located at
Second cavity 252 is interior and erection is fixed between first dividing plate 221 and the second partition 222.Described second is anti-
Device 3 is answered to be located at the downstream of the 3rd cavity 253.For the ease of inspecting the inside of the mixed structure 2, the housing 21 is also wrapped
Include the first inspection window 261 and the second inspection window corresponding to second cavity 252 corresponding to first cavity 251
262。
Please join shown in Fig. 3 to Fig. 6, in illustrative embodiments of the present invention, the blender 23 and the mixing tube 24
It is two.The exhaust entrance 210 of the housing 21 deviates the axis of the housing 21, in the implementation method shown in Fig. 3, institute
State the deflection of exhaust entrance 210 top.It is arranged such, just can flow out enough spaces in the bottom of end plate 211 is used to install spray
Mouth 26.In one embodiment of the invention, the nozzle 26 is two（One is only schematically shown in Fig. 3）, institute
The quantity for stating nozzle 26 is identical with the quantity of the blender 23.
Please join shown in Fig. 7 and Fig. 8, in illustrative embodiments of the present invention, the blender 23 is in hollow cylinder
Shape, its circumference is provided with some openings 232 of some outside flange 231 and corresponding these flange 231.The flange 231
It is in tilted layout and can form eddy flow with when exhaust is from the opening 232 into the blender（Shown in arrow in ginseng Fig. 8）.
The blender 23 is provided with internally positioned hybrid chamber 233, and the hybrid chamber 233 is connected with the opening 232.Operationally,
Nozzle 26 on end plate 211 is vertically to the urea liquid of jet atomization in the hybrid chamber 233.The exhaust of eddy flow exists
Can more fully mix with urea spray droplet after into hybrid chamber 233, improve mixing uniformity, accelerate urea droplets
Evaporation, forms uniform ammonia distribution, so as to improve the transformation efficiency of NOx, reduces the risk of urea crystals.
Please join shown in Fig. 3, the blender 23 also offsets from the axis of the housing 21.In the embodiment party of present invention diagram
In formula, the blender 23 is partial to the bottom of first cavity 251, forms larger with the top in first cavity 251
Blending space, increase mixing distance.That is, the blender 23 is mutually wrong in the axial direction with the exhaust entrance 210
Open.
In one embodiment of the invention, the two ends of the blender 23 are respectively welded at the end plate 211 and institute
State on the first dividing plate 221.First dividing plate 221 is provided with perforation 2211 in the position of the correspondence blender 23, and described the
One dividing plate 221 is not provided with perforation in the periphery of the blender 23.It is arranged such, the exhaust into the hybrid chamber 233
Perforation 2211 after mixing with urea spray droplet through first dividing plate 221 enters in the mixing tube 24.
The mixing tube 24 is mutually aligned and is interconnected with the blender 23 on the axial direction.Please join Fig. 9 to figure
Shown in 11, the mixing tube 24 includes the first semi-circular tube 241 and the second semi-circular tube 242 that cooperate, first semicircle
Pipe 241 diametrically mutually staggers to form first outlet 243 and second outlet on circumference with second semi-circular tube 242
244.First semi-circular tube 241 include the second end face 2412 relative with the first end face 2411 of first end face 2411 with
And the first space 2413 between first, second end face 2411,2412.Second semi-circular tube 242 includes the 3rd
Fourth end face 2422 relative with the 3rd end face 2421 of end face 2421 and positioned at the three, the 4th end face 2421,
Second space 2423 between 2422.First space 2413 connects to form the mixing tube with the second space 2423
24 blending space 240.The blending space 240 is connected with the first outlet 243 and the second outlet 244.Institute
State the side that first end face 2411 is located at the mixing tube 24 with the 3rd end face 2421（In the implementation method shown in Fig. 9
It is front side）To form air inlet 245.The second end face 2412 is located at the another of the mixing tube 24 with the 4th end face 2422
Side（It is rear side in the implementation method shown in Fig. 9）, and to be blocked by the second partition 222.The first outlet 243
It is opposite with the opening direction of the second outlet 244 forming eddy flow（Shown in broad arrow in ginseng Figure 11）.
Please join shown in Fig. 9 and Figure 10, first semi-circular tube 241 include respectively positioned at both sides first end 2414 and
Second end 2415；Second semi-circular tube 242 includes the 3rd end 2424 and the 4th end 2425 respectively positioned at both sides.
The first end 2414 is located at the first end 2414 and institute near the 3rd end 2424, the first outlet 243
State between the 3rd end 2424；The second end 2415 is located at institute near the 4th end 2425, the second outlet 244
State between second end 2415 and the 4th end 2425.
The second end 2415 is located at the inner side of the 4th end 2425, and the part of the second end 2415 extends
Enter in the second space 2423.3rd end 2424 is located at the inner side of the first end 2414, and the 3rd end
End 2424 is extended partially into first space 2413.
In illustrative embodiments of the present invention, first semi-circular tube 241 is located at the top of the mixing tube 24, described
Second semi-circular tube 242 is located at the bottom of the mixing tube 24.The radius R1 of first semi-circular tube 241 and second semi-circular tube
242 radius R2 is identical.Preferably, first semi-circular tube 241 with second semi-circular tube 242 is cut by same cylindrical tube
Cut, with cost-effective.
In one embodiment of the invention, the two ends of the mixing tube 24 are respectively welded at first dividing plate 221
On the second partition 222.The second partition 222 is provided with some perforation 2221, and this in the periphery of the mixing tube 24
A little perforation 2221 are connected with the 3rd cavity 253；The second partition 222 is by the second end face 2412 and the described 4th
End face 2422 is sealed up so that the exhaust for entering the mixing tube 24 can only be from the first outlet 243 and the second outlet
244 leave.
Please join shown in Figure 11, during work, exhaust enters the blending space 240 from the air inlet 245, then from described
First outlet 243 forms eddy-currents and leaves the mixing tube 24 with the second outlet 244.
By setting the first semi-circular tube 241 and the second semi-circular tube 242 that cooperate, the structure of mixing tube of the present invention 24
It is fairly simple, it is easy to manufacture and assembling.The semi-circular tube 242 of first semi-circular tube 241 and second diametrically mutually staggers with circle
Form first outlet 243 and second outlet 244 on week, the opening direction of the first outlet 243 and the second outlet 244
Conversely it is used to form exhaust eddy flow, this eddy flow can also rotate after blending space 240 is entered, therefore increased air-flow in limited sky
Interior stroke, to increase the distance of urea droplets evaporation, improves evaporation rate, improves the uniformity of mixing, reduces urine
The risk of element crystallization.In addition, please join shown in Figure 11, the eddy flow side formed at the first outlet 243 and the second outlet 244
To consistent（Form two strands of rotation direction identical air-flows）, also have stiffening effect to the eddy flow of formation in blending space 240.
In addition, above example is merely to illustrate the present invention and not limits technical scheme described in the invention, to this
The understanding of specification should be based on person of ordinary skill in the field, although this specification is with reference to the above embodiments pair
Present invention has been detailed description, but, it will be understood by those within the art that, the technology of art
Personnel still can modify or equivalent to the present invention, and all do not depart from the technology of the spirit and scope of the present invention
Scheme and its improvement, all should cover in scope of the presently claimed invention.
Claims (10)
1. a kind of mixing tube being applied in engine exhaust treatment apparatus, it is characterised in that：The mixing tube includes phase interworking
The first semi-circular tube and the second semi-circular tube for closing, first semi-circular tube and second semi-circular tube diametrically mutually stagger with
First outlet and second outlet are formed on circumference；First semi-circular tube includes that first end face is relative with the first end face
Second end face and the first space between first, second end face；Second semi-circular tube include the 3rd end face,
Fourth end face relative with the 3rd end face and the second space between the three, the 4th end face；Described first
Space connects to form the blending space of the mixing tube with the second space, the blending space and the first outlet with
And the second outlet is connected；The first end face is located at the side of the mixing tube to form air inlet with the 3rd end face
Mouthful, the second end face is located at the opposite side of the mixing tube with the 4th end face, and to be blocked；The first outlet
It is opposite with the opening direction of the second outlet to be used to form exhaust eddy flow.
2. mixing tube as claimed in claim 1, it is characterised in that：First semi-circular tube includes being located at the first of both sides respectively
End and second end；Second semi-circular tube includes the 3rd end and the 4th end respectively positioned at both sides；Described
One end is located between the first end and the 3rd end near the 3rd end, the first outlet；Described
Two ends are located between the second end and the 4th end near the 4th end, the second outlet.
3. mixing tube as claimed in claim 2, it is characterised in that：The second end is located at the inner side of the 4th end,
And the second end is extended partially into the second space；3rd end is located at the inner side of the first end, and
3rd end section is extended into first space.
4. mixing tube as claimed in claim 1, it is characterised in that：First semi-circular tube is located at the top of the mixing tube,
Second semi-circular tube is located at the bottom of the mixing tube.
5. mixing tube as claimed in claim 1, it is characterised in that：The radius of first semi-circular tube and second semi-circular tube
Radius it is identical.
6. mixing tube as claimed in claim 1, it is characterised in that：First semi-circular tube is by same with second semi-circular tube
The cutting of piece cylindrical tube.
7. a kind of exhaust gas treatment device, it includes housing to be installed on some dividing plates in the housing, some dividing plate bags
Include the first dividing plate and second partition, the housing includes the first cavity positioned at the first dividing plate upstream, positioned at described the
The second cavity between one dividing plate and the second partition and the 3rd cavity positioned at the second partition downstream, wherein institute
State exhaust gas treatment device also include the blender in first cavity, the mixing tube in second cavity and
Positioned at the SCR module in the 3rd cavity downstream, it is characterised in that：The blender and the mixing tube phase
Connection, mixing tube of the mixing tube described in any one in claim 1 to 6.
8. exhaust gas treatment device as claimed in claim 7, it is characterised in that：The blender is in hollow cylindrical shape, its
Circumference be provided with some outside flange and correspondence these flange some openings, the flange be in tilted layout with when exhaust from
The opening is into can form eddy flow during the blender；The blender is provided with internally positioned hybrid chamber, the mixing
Chamber and the open communication, the exhaust gas treatment device also include installing on the housing and to vertically to the mixing
The nozzle of urea liquid is sprayed in chamber.
9. exhaust gas treatment device as claimed in claim 7, it is characterised in that：First dividing plate is in the periphery of the blender
It is not provided with perforation；The second partition is provided with some perforation, and these perforation and the described 3rd in the periphery of the mixing tube
Cavity is connected；The second partition lives the second end face and the 4th end face seal so that enter the mixing tube
Exhaust can only be left with the second outlet from the first outlet.
10. exhaust gas treatment device as claimed in claim 7, it is characterised in that：The housing is provided with exhaust entrance in its end,
The blender mutually staggers in the axial direction with the exhaust entrance, blender phase on the axial direction with the mixing tube
Mutually alignment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510089958.7A CN104594990B (en) | 2015-02-27 | 2015-02-27 | Mixing tube and its exhaust gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510089958.7A CN104594990B (en) | 2015-02-27 | 2015-02-27 | Mixing tube and its exhaust gas treatment device |
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| Publication Number | Publication Date |
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| CN104594990A CN104594990A (en) | 2015-05-06 |
| CN104594990B true CN104594990B (en) | 2017-06-23 |
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| CN201510089958.7A Active CN104594990B (en) | 2015-02-27 | 2015-02-27 | Mixing tube and its exhaust gas treatment device |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204511594U (en) * | 2015-02-27 | 2015-07-29 | 天纳克（苏州）排放系统有限公司 | Mixing tube and exhaust gas treatment device thereof |
| WO2016180244A1 (en) * | 2015-05-13 | 2016-11-17 | 天纳克（苏州）排放系统有限公司 | Two-layer mixing tube and exhaust treatment apparatus having same |
| CN104832256A (en) * | 2015-05-13 | 2015-08-12 | 天纳克（苏州）排放系统有限公司 | Dual-layer mixing pipe and exhaust treating device thereof |
| CN104832255B (en) * | 2015-05-13 | 2018-08-28 | 天纳克（苏州）排放系统有限公司 | Two-layer hybrid pipe and its exhaust gas treatment device |
| CN106246303B (en) * | 2016-10-12 | 2019-01-15 | 天纳克（苏州）排放系统有限公司 | Tail-gas after treatment apparatus |
| US10316721B1 (en) | 2018-04-23 | 2019-06-11 | Faurecia Emissions Control Technologies, Usa, Llc | High efficiency mixer for vehicle exhaust system |
| US10287948B1 (en) | 2018-04-23 | 2019-05-14 | Faurecia Emissions Control Technologies, Usa, Llc | High efficiency mixer for vehicle exhaust system |
| CN109184867B (en) * | 2018-08-24 | 2019-11-15 | 无锡威孚力达催化净化器有限责任公司 | The cartridge type urea mixer of embedded rotating vane |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5066435B2 (en) * | 2007-12-14 | 2012-11-07 | 東京濾器株式会社 | Exhaust gas purification equipment for diesel engines |
| US20100186394A1 (en) * | 2009-01-26 | 2010-07-29 | Caterpillar Inc. | Exhaust gas after treatment assembly |
| FR2966197B1 (en) * | 2010-10-18 | 2014-08-15 | Faurecia Sys Echappement | EXHAUST LINE FOR MOTOR VEHICLE. |
| KR101251518B1 (en) * | 2010-12-09 | 2013-04-05 | 기아자동차주식회사 | Dosing module for exhaust after-treatment system of vehicle |
| JP5601342B2 (en) * | 2012-04-27 | 2014-10-08 | 千住金属工業株式会社 | Drift plate and jet device |
| US9221016B2 (en) * | 2012-12-05 | 2015-12-29 | Cummins Cal Pacific, Llc | Exhaust aftertreatment packaging for a diesel genset |
| CN103821598A (en) * | 2014-03-21 | 2014-05-28 | 大连海事大学 | Tail gas selective catalytic reduction denitration system for marine diesel engine |
| CN204511594U (en) * | 2015-02-27 | 2015-07-29 | 天纳克（苏州）排放系统有限公司 | Mixing tube and exhaust gas treatment device thereof |
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