CN106762051B - Mixing tube and its exhaust gas treatment device - Google Patents
Mixing tube and its exhaust gas treatment device Download PDFInfo
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- CN106762051B CN106762051B CN201611179877.7A CN201611179877A CN106762051B CN 106762051 B CN106762051 B CN 106762051B CN 201611179877 A CN201611179877 A CN 201611179877A CN 106762051 B CN106762051 B CN 106762051B
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Abstract
A kind of mixing tube, in engine exhaust treatment apparatus, the mixing tube to be formed with airflow inlet in hollow structure, one end of the mixing tube, and the other end of the mixing tube is blocked；In the shape of a spiral, the outer wall of the mixing tube is equipped with the air stream outlet axially extended to form exhaust eddy flow for the end face of the mixing tube.So set, increasing the stroke of air-flow in a limited space, to increase the distance of urea droplets evaporation, evaporation rate is improved, the uniformity of mixing is improved, reduces the risk of urea crystals.The invention further relates to a kind of exhaust gas treatment devices with the mixing tube.
Description
This divisional application be the applying date be on March 17th, 2015, it is entitled application No. is 201510115039.2
The divisional application of the Chinese invention patent application of " mixing tube and its exhaust gas treatment device ".
Technical field
The present invention relates to a kind of mixing tube and its exhaust gas treatment devices, belong to engine exhaust post-processing technology field.
Background technique
Research shows that ammonia distribution in exhaust after treatment system (such as selective catalytic reduction system operating, SCR system) pipeline
Uniformity coefficient has important influence to the overall performance and endurance quality of system.If ammonia, which is unevenly distributed, will lead to regional area
Ammonia causes oxynitrides (NOx) transformation efficiency too low excessively to easily cause NH_3 leakage in other ammonia thin areas.It is long
The uneven distribution of time ammonia will lead to that catalyst aging is uneven, to influence the overall performance of catalyst.In addition, urea solution
The uneven distribution of drop will cause local tube wall or mixed structure temperature is too low, forms crystallization, exhaust pipe can be blocked when serious, is led
Cause engine power performance decline.
Therefore, it is necessary to a kind of novel mixing tube and its exhaust gas treatment device with the mixing tube be provided, to solve
Above-mentioned technical problem.
Summary of the invention
The simple and uniformly mixed mixing tube and with the mixing tube the purpose of the present invention is to provide a kind of structure
Exhaust gas treatment device.
To achieve the above object, the present invention adopts the following technical scheme: a kind of mixing tube, fills for engine exhaust processing
In setting, the mixing tube is in hollow structure, and one end of the mixing tube is formed with airflow inlet, the other end quilt of the mixing tube
It blocks；In the shape of a spiral, the outer wall of the mixing tube is equipped with the air stream outlet axially extended with shape for the end face of the mixing tube
Cyclonic current in a row.
Technical solution as a further improvement of that present invention, the spiral end face is sequentially increased by radius of curvature
Multiple circular sliding slopes form.
Technical solution as a further improvement of that present invention, the mixing tube include mutually matched first semi-circular tube and
Second semi-circular tube, first semi-circular tube is different from the radius of second semi-circular tube, first semi-circular tube and described second
The side of semi-circular tube links together, and the other side of first semi-circular tube and second semi-circular tube mutually staggers radially
To form the air stream outlet.
Technical solution as a further improvement of that present invention, the air stream outlet only have one.
Technical solution as a further improvement of that present invention, the mixing tube is at least around a circle.
The present invention also provides a kind of exhaust gas treatment devices comprising shell be installed on the shell it is intracorporal it is several every
Plate, several partitions include first partition and second partition, and the shell includes positioned at the of the first partition upstream
One cavity, the second cavity between the first partition and the second partition and be located at the second partition downstream
Third cavity, wherein the exhaust gas treatment device further include positioned at the intracorporal mixer of first chamber, be located at described second
The intracorporal mixing tube of chamber and selective catalytic reduction module positioned at third cavity downstream, the mixing tube are above-mentioned
Mixing tube.
Technical solution as a further improvement of that present invention, the mixer are in hollow cylindrical shape, are set on circumference
There are several openings of several outside flange and these corresponding flange, the flange is in tilted layout to work as exhaust from the opening
Eddy flow is capable of forming when into the mixer.
Technical solution as a further improvement of that present invention, the mixer is equipped with internally positioned mixing chamber, described mixed
Close chamber and the open communication；The exhaust gas treatment device further includes installation on the housing and to mix along axial direction to described
Close the nozzle that urea liquid is sprayed in chamber.
Technical solution as a further improvement of that present invention, the first partition are not provided in the periphery of the mixer
Perforation；The second partition is equipped with several perforation in the periphery of the mixing tube, and these perforation are connected to the third cavity；
The second partition seals up the other end of the mixing tube, so that the exhaust into the mixing tube can only be from the air-flow
It leaves outlet.
Technical solution as a further improvement of that present invention, the shell are equipped with exhaust entrance, the mixing in its end
Device mutually staggers in the axial direction of the shell with the exhaust entrance, and the mixer and the mixing tube are in the shell
It is mutually aligned in axial direction.
Compared to the prior art, mixing tube of the invention is vented eddy flow in the shape of a spiral to be formed, therefore increases air-flow and exist
Stroke in the confined space improves evaporation rate, improves the uniformity of mixing to increase the distance of urea droplets evaporation, drops
The low risk of urea crystals.
Detailed description of the invention
Fig. 1 is the stereoscopic schematic diagram 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 Fig. 2 is removed after end housing.
Fig. 4 is the perspective view of mixed structure of the present invention.
Fig. 5 is the stereogram exploded view of Fig. 4.
Fig. 6 is the perspective view of mixer in Fig. 5.
Fig. 7 is the main view of Fig. 6, and has gone out the direction of rotation of air-flow with arrows.
Fig. 8 is the perspective view of mixing tube in Fig. 5.
Fig. 9 is side view of the Fig. 8 along a certain angle.
Figure 10 is identical as the angle of Fig. 9, and has gone out the direction of rotation of air-flow with arrows.
Figure 11 is the side view of mixing tube of the invention in another embodiment.
Figure 12 is identical as the angle of Figure 11, and has gone out the direction of rotation of air-flow with arrows.
Specific embodiment
It please join shown in Fig. 1 to Fig. 5, present invention discloses a kind of exhaust gas treatment devices 100, to handle the row of engine
Gas.The exhaust gas treatment device 100 includes first reactor 1, mixed structure 2, second reactor 3 and third reactor 4.?
In illustrative embodiments of the present invention, the first reactor 1, the second reactor 3 and the third reactor 4 are being vented
Flow direction on be arranged successively.Also, functionally, the first reactor 1 is oxidation catalyzer (DOC), described second
Reactor 3 is selective oxidation catalytic module (SCR), the third reactor 4 is 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 design according to actual needs
For other kinds of catalyst converter or combination, details are not described herein.
It please join shown in Fig. 3 to Fig. 5, the mixed structure 2 includes shell 21, several partitions being installed in the shell 21
22, the mixer 23 and mixing tube 24 in the shell 21.In illustrative embodiments of the present invention, the shell 21
In cylindrical shape comprising the exhaust entrance 210 being connected to the first reactor 1.The shell 21 further includes being located at side
End plate 211.Several partitions 22 include first partition 221 and second partition 222.It please join shown in Fig. 3, the shell 21
Including being located at the first cavity 251 of 221 upstream of first partition, being located at the first partition 221 and the second partition 222
Between the second cavity 252 and third cavity 253 positioned at 222 downstream of second partition.The mixer 23 is located at institute
It states in the first cavity 251 and sets up and be fixed between the end plate 211 and the first partition 221.The mixing tube 24 is located at
In second cavity 252 and erection is fixed between the first partition 221 and the second partition 222.Described second is anti-
Device 3 is answered to be located at the downstream of the third cavity 253.For the ease of inspecting the inside of the mixed structure 2, the shell 21 is also wrapped
Include the second inspection window corresponding to the first inspection window 261 of first cavity 251 and corresponding to second cavity 252
262。
It please join shown in Fig. 3 to Fig. 5, in illustrative embodiments of the present invention, the mixer 23 and the mixing tube 24
It is two.The exhaust entrance 210 of the shell 21 deviates the axis of the shell 21, in the embodiment shown in fig. 3, institute
It states exhaust entrance 210 and is biased to top.So set, enough spaces can be flowed out to install spray in the lower part of end plate 211
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 as the quantity of the mixer 23.
It please join shown in Fig. 6 and Fig. 7, in illustrative embodiments of the present invention, the mixer 23 is in hollow cylindrical body
Shape, circumference are equipped with several openings 232 of several outside flange 231 and these corresponding flange 231.The flange 231
It is in tilted layout to be capable of forming eddy flow (the arrow institute in ginseng Fig. 7 when exhaust enters the mixer 23 from the opening 232
Show).The mixer 23 is equipped with internally positioned mixing chamber 233, and the mixing chamber 233 is connected to the opening 232.It is working
When, the nozzle 26 on end plate 211 is mounted on along the urea liquid of axial direction jet atomization into the mixing chamber 233.The row of eddy flow
Gas can more fully mix after entering mixing chamber 233 with urea spray droplet, improve mixing uniformity, accelerate urea solution
The evaporation of drop forms uniform ammonia distribution, to improve the transformation efficiency of NOx, reduces the risk of urea crystals.
It please join shown in Fig. 3, the mixer 23 also offsets from the axis of the shell 21.In the embodiment party that the present invention illustrates
In formula, the mixer 23 is biased to the lower part of first cavity 251, is formed with the top in first cavity 251 larger
Blending space, increase mixing distance.That is, the mixer 23 is mutually wrong in the axial direction with the exhaust entrance 210
It opens.
In one embodiment of the invention, the both ends of the mixer 23 are respectively welded at the end plate 211 and institute
It states in first partition 221.The first partition 221 is equipped with perforation 2211 in the position of the correspondence mixer 23, and described the
One partition 221 is not provided with perforation in the periphery of the mixer 23.So set, into the exhaust in the mixing chamber 233
The perforation 2211 that the first partition 221 is passed through after mixing with urea spray droplet enters in the mixing tube 24.
The mixing tube 24 is mutually aligned and is interconnected in the axial direction with the mixer 23.It please join Fig. 8 to figure
Shown in 10, in one embodiment of the invention, the mixing tube 24 is in hollow structure, and the end face of the mixing tube 24 is in spiral shell
Shape is revolved, one end of the mixing tube 24 is formed with airflow inlet 240, and the other end of the mixing tube 24 is blocked.The mixing
The outer wall of pipe 24 is equipped with the air stream outlet 241 axially extended to form exhaust eddy flow (shown in the broad arrow in ginseng Figure 10).
In illustrative embodiments of the present invention, the spiral end face is the multiple circular sliding slopes being sequentially increased by radius of curvature
It forms.The mixing tube 24 is around several circles.The air stream outlet 241 only has one, in order to form eddy flow.
It please join shown in Figure 11 and Figure 12, in another embodiment of the invention, the mixing tube 24 includes phase interworking
The first semi-circular tube 242 and the second semi-circular tube 243 closed.The radius R1 of first semi-circular tube 242 and second semi-circular tube
243 radius R2 is different.The side of first semi-circular tube 242 and second semi-circular tube 243 links together, and described first
The other side of semi-circular tube 242 and second semi-circular tube 243 is mutually staggered radially to form the air stream outlet 241.It is logical
Cross and mutually matched first semi-circular tube 242 and the second semi-circular tube 243 be set, mixing tube 24 of the present invention it is relatively simple for structure,
Easily fabricated and assembly.
In one embodiment of the invention, the both ends of the mixing tube 24 are respectively welded at the first partition 221
On the second partition 222.The second partition 222 is equipped with several perforation 2221, and this in the periphery of the mixing tube 24
A little perforation 2221 are connected to the third cavity 253；The second partition 222 is by the other end of the mixing tube 24 (in Fig. 3
For right end) it seals up, so that the exhaust into the mixing tube 24 can only be left from the air stream outlet 241.
It please join shown in Figure 10 and Figure 12, when work, exhaust enters the mixing tube 24 from the airflow inlet 240, then
Eddy-currents, which is formed, from the air stream outlet 241 leaves the mixing tube 24.So set, increasing air-flow in a limited space
Stroke improves evaporation rate, improves the uniformity of mixing, reduce urea crystals to increase the distance of urea droplets evaporation
Risk.
In addition, above embodiments are merely to illustrate the present invention and not limit the technical scheme described by the invention, to this
The understanding of specification should be based on person of ordinary skill in the field, although this specification is referring to the above embodiments pair
Present invention has been detailed description, still, those skilled in the art should understand that, the technology of technical field
Personnel still can modify or equivalently replace the present invention, and all do not depart from the technology of the spirit and scope of the present invention
Scheme and its improvement should all be covered in scope of the presently claimed invention.
Claims (10)
1. a kind of mixing tube, in engine exhaust treatment apparatus, it is characterised in that: the mixing tube is in hollow structure, institute
The one end for stating mixing tube is formed with airflow inlet, and the other end of the mixing tube is blocked；The end face of the mixing tube is helically
Shape, the outer wall of the mixing tube are equipped with the air stream outlet axially extended to form exhaust eddy flow.
2. mixing tube as described in claim 1, it is characterised in that: the spiral end face is successively increased by radius of curvature
Big multiple circular sliding slopes form.
3. mixing tube as described in claim 1, it is characterised in that: the mixing tube include mutually matched first semi-circular tube with
And second semi-circular tube, first semi-circular tube is different from the radius of second semi-circular tube, first semi-circular tube and described the
The side of two semi-circular tubes links together, and the other side of first semi-circular tube and second semi-circular tube is mutually wrong radially
It opens to form the air stream outlet.
4. mixing tube as described in claim 1, it is characterised in that: the air stream outlet only has one.
5. mixing tube as described in claim 1, it is characterised in that: the mixing tube is at least around a circle.
6. a kind of exhaust gas treatment device comprising shell is to be installed on the intracorporal several partitions of the shell, several partition packets
Include first partition and second partition, the shell include positioned at the first partition upstream the first cavity, be located at described the
The second cavity between one partition and the second partition and the third cavity positioned at the second partition downstream, wherein institute
State exhaust gas treatment device further include positioned at the intracorporal mixer of first chamber, be located at the intracorporal mixing tube of second chamber and
Selective catalytic reduction module positioned at third cavity downstream, it is characterised in that: the mixing tube is claim 1 to 5
Mixing tube described in any one of item.
7. exhaust gas treatment device as claimed in claim 6, it is characterised in that: the mixer is in hollow cylindrical shape,
Circumference is equipped with several openings of several outside flange and these corresponding flange, the flange be in tilted layout with when exhaust from
The opening is capable of forming eddy flow when entering the mixer.
8. exhaust gas treatment device as claimed in claim 7, it is characterised in that: the mixer is equipped with internally positioned mixing
Chamber, the mixing chamber and the open communication；The exhaust gas treatment device further includes installation on the housing and to along axis
To the nozzle for spraying urea liquid into the mixing chamber.
9. exhaust gas treatment device as claimed in claim 6, it is characterised in that: the first partition is in the periphery of the mixer
It is not provided with perforation；The second partition is equipped with several perforation, and these perforation and the third in the periphery of the mixing tube
Cavity connection；The second partition seals up the other end of the mixing tube, so that the exhaust into the mixing tube can only
It is left from the air stream outlet.
10. exhaust gas treatment device as claimed in claim 6, it is characterised in that: the shell is equipped with exhaust entrance in its end,
The mixer mutually staggers in the axial direction of the shell with the exhaust entrance, and the mixer and the mixing tube are in institute
It states and is mutually aligned in the axial direction of shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611179877.7A CN106762051B (en) | 2015-03-17 | 2015-03-17 | Mixing tube and its exhaust gas treatment device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510115039.2A CN104712401B (en) | 2015-03-17 | 2015-03-17 | Exhaust-gas disposal device |
| CN201611179877.7A CN106762051B (en) | 2015-03-17 | 2015-03-17 | Mixing tube and its exhaust gas treatment device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510115039.2A Division CN104712401B (en) | 2015-03-17 | 2015-03-17 | Exhaust-gas disposal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106762051A CN106762051A (en) | 2017-05-31 |
| CN106762051B true CN106762051B (en) | 2019-05-03 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611179877.7A Active CN106762051B (en) | 2015-03-17 | 2015-03-17 | Mixing tube and its exhaust gas treatment device |
| CN201510115039.2A Expired - Fee Related CN104712401B (en) | 2015-03-17 | 2015-03-17 | Exhaust-gas disposal device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510115039.2A Expired - Fee Related CN104712401B (en) | 2015-03-17 | 2015-03-17 | Exhaust-gas disposal device |
Country Status (1)
| Country | Link |
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| CN (2) | CN106762051B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204511599U (en) * | 2015-03-17 | 2015-07-29 | 天纳克（苏州）排放系统有限公司 | Mixing tube and exhaust gas treatment device thereof |
| CN108952905B (en) * | 2015-12-18 | 2020-01-03 | 天纳克（苏州）排放系统有限公司 | Mixing device |
| CN107461250B (en) * | 2016-06-03 | 2024-06-14 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment system for engine |
| CN107514305B (en) * | 2016-06-15 | 2024-06-25 | 天纳克（苏州）排放系统有限公司 | Tail gas aftertreatment device |
| CN106110980A (en) * | 2016-08-30 | 2016-11-16 | 潍柴动力股份有限公司 | A kind of SCR urea liquid blender |
| CN106237913A (en) * | 2016-08-30 | 2016-12-21 | 潍柴动力股份有限公司 | A kind of SCR urea liquid blender and inner tube assembly thereof |
| CN108979803B (en) * | 2018-07-25 | 2023-07-25 | 武汉水草能源科技研发中心(有限合伙) | Method and device for mixing liquid and gas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1838984A (en) * | 2003-10-10 | 2006-09-27 | 杉浦彦六 | Method for purifying liquid and static mixer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006049875A1 (en) * | 2006-10-23 | 2008-04-24 | Robert Bosch Gmbh | Air/fuel-mixture forming device, has doser supplying liquid into area, in which gas is supplied to another area for producing mixture, and turbulent flow producing device producing flow to mix mixture with another mixture in latter area |
| DE102007009890A1 (en) * | 2007-02-28 | 2008-09-04 | Arvinmeritor Emissions Technologies Gmbh | Static mixing element, particularly arrangement in exhaust gas system of internal combustion engine, has grid-like component through which exhaust gas flows and component is formed in single-piece |
| EP2111916B1 (en) * | 2008-04-21 | 2012-10-24 | Swenox AB | Gas treatment apparatus, vehicle equipped with it and method for treatment of an exhaust gas |
| WO2014051598A1 (en) * | 2012-09-28 | 2014-04-03 | Faurecia Emissions Control Technologies | Anti-deposit forming surface finish for exhaust system mixer |
| CN204511599U (en) * | 2015-03-17 | 2015-07-29 | 天纳克（苏州）排放系统有限公司 | Mixing tube and exhaust gas treatment device thereof |
-
2015
- 2015-03-17 CN CN201611179877.7A patent/CN106762051B/en active Active
- 2015-03-17 CN CN201510115039.2A patent/CN104712401B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1838984A (en) * | 2003-10-10 | 2006-09-27 | 杉浦彦六 | Method for purifying liquid and static mixer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106762051A (en) | 2017-05-31 |
| CN104712401A (en) | 2015-06-17 |
| CN104712401B (en) | 2017-05-10 |
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