CN111156072B - Tail gas aftertreatment mixing arrangement - Google Patents
Tail gas aftertreatment mixing arrangement Download PDFInfo
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- CN111156072B CN111156072B CN201911314720.4A CN201911314720A CN111156072B CN 111156072 B CN111156072 B CN 111156072B CN 201911314720 A CN201911314720 A CN 201911314720A CN 111156072 B CN111156072 B CN 111156072B
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- air
- air inlet
- cavity
- air outlet
- guide plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1486—Means to prevent the substance from freezing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a tail gas aftertreatment mixing device, which comprises an air inlet cavity and an air outlet cavity, wherein the air inlet cavity is communicated with the air outlet cavity; the air inlet cavity and the air outlet cavity are respectively provided with an air inlet guide plate and an air outlet guide plate; the air inlet guide plate is provided with a plurality of first air inlets and a plurality of second air inlets, all or part of the second air inlets are provided with air inlet blades, and the corresponding second air inlet is arranged at the position of the air inlet guide plate corresponding to each air inlet blade; the air outlet guide plate is provided with air outlet blades, and a blade air outlet is formed in the position of the air outlet guide plate corresponding to each air outlet blade; and the air inlet cavity is also provided with a urea nozzle connecting port for connecting with a urea nozzle. The invention improves the uniform mixing degree of the tail gas and the waste gas and the urea and reduces the crystallization amount.
Description
Technical Field
The invention relates to the field of automobile exhaust systems, in particular to an exhaust aftertreatment mixing device.
Background
A Selective Catalytic Reduction (SCR) aftertreatment device is an exhaust gas treatment device that converts Nitrogen Oxides (NOX) generated by high-temperature combustion of an engine in an exhaust pipe into harmless nitrogen and water using an on-vehicle urea aqueous solution. With the upgrading of commercial vehicle exhaust emission regulations, Selective Catalytic Reduction (SCR) aftertreatment devices have become popular for use on commercial vehicles. There are many problems to be solved in the application, and the more outstanding problem is the problem of poor urea crystallization and urea distribution uniformity, which results in low SCR conversion efficiency, uneven mixing of tail gas and urea, and influence on the after-treatment effect.
Disclosure of Invention
The invention aims to provide a tail gas aftertreatment mixing device, which can well mix tail gas and urea and reduce the crystallization risk of urea.
In order to achieve the purpose, the technical scheme of the invention comprises the following steps: the air inlet cavity and the air outlet cavity are rotatably connected and communicated with the air inlet cavity;
the air inlet cavity and the air outlet cavity are both of hollow structures;
the air inlet cavity and the air outlet cavity are respectively provided with an air inlet guide plate and an air outlet guide plate;
the air inlet guide plate is provided with a plurality of first air inlets and a plurality of second air inlets, the second air inlets are distributed in an array manner, all or part of the second air inlets are provided with air inlet blades which are obliquely arranged towards the interior of the air inlet cavity and the direction of the air outlet cavity, and the position of the air inlet guide plate corresponding to each air inlet blade is provided with a corresponding second air inlet;
the air outlet guide plate is provided with a plurality of air outlet blades which are obliquely arranged towards the outer side of the cavity of the air outlet cavity, and a blade air outlet is formed in the position of the air outlet guide plate corresponding to each air outlet blade;
and the air inlet cavity is also provided with a urea nozzle connecting port for connecting with a urea nozzle.
Further, the number of the air inlet blades is more than one;
the number of the air outlet blades is more than one;
the number of the first air inlets is two or more, the first air inlets are respectively positioned at two sides of an array formed by the second air inlets, and the number of the second air inlets is more than one.
Furthermore, in the array formed by the second air inlets, the row of second air inlets of which two sides are adjacent to the first air inlet are not provided with the air inlet blades, and in the rest of the second air inlets, the position of each second air inlet is correspondingly provided with one air inlet blade.
Further, the inclination angle of the air inlet blade relative to the air inlet guide plate is 10-60 degrees; the inclination angle of the air outlet blade relative to the air inlet guide plate is 10-60 degrees.
Further, the orientation of the air outlet blade comprises upward, downward, leftward and rightward.
Further, the overall orientation of the air outlet blades is distributed in a clockwise or counterclockwise windmill shape.
Further, be provided with spiral water conservancy diversion structure on the cavity of giving vent to anger the chamber, spiral water conservancy diversion structure is for giving vent to anger the first arch of chamber periphery clockwise or anticlockwise rotation.
Furthermore, the spiral flow guide structure is bent, one end of the spiral flow guide structure is communicated with the air inlet cavity, and the other end of the spiral flow guide structure is fixedly connected to the air outlet cavity.
Furthermore, be provided with on the air intake cavity first protruding looks adaptation second is protruding, the bellied one end of second is provided with urea nozzle connector, the bellied other end of second and spiral water conservancy diversion structure intercommunication, the other end rigid coupling of spiral water conservancy diversion structure is on giving vent to anger the cavity.
Furthermore, the rotating direction of the spiral flow guide structure is opposite to the direction of the arrangement of the air outlet blades.
The invention has the following positive effects:
the invention improves the uniform mixing degree of the tail gas and the waste gas and the urea and reduces the crystallization amount.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a rear view of the present invention;
FIG. 4 is an exploded view of the present invention;
in the attached drawing, a gas inlet cavity 1, a second bulge 1-2, a gas outlet cavity 2, a first bulge 2-2, a gas inlet guide plate 4, a first gas inlet 4-1, a gas inlet blade 4-2, a second gas inlet 4-3, a gas outlet guide plate 5, a gas outlet blade port 5-2, a urea nozzle connecting port 6 and a urea nozzle 7.
Detailed Description
As shown in fig. 1-4, the present invention comprises an air inlet cavity 1 and an air outlet cavity 2 rotatably connected and communicated with the air inlet cavity 1, the position between the air inlet cavity 1 and the air outlet cavity 2 can be set arbitrarily, and the air inlet cavity 1 and the air outlet cavity 2 can be arranged horizontally, vertically or obliquely. In this embodiment, the air inlet cavity 1 and the air outlet cavity 2 are distributed up and down.
The air inlet cavity 1 and the air outlet cavity 2 are respectively provided with an air inlet guide plate 4 and an air outlet guide plate 5; the air inlet cavity 1 comprises an air inlet cavity body and an air inlet guide plate 4 covering the air inlet cavity 1, and a space between the air inlet cavity body and the air inlet guide plate 4 forms a cavity structure for fully mixing tail gas and urea. The air outlet cavity 2 comprises an air outlet cavity body and an air outlet guide plate 5 covered on the air outlet cavity body, and a space between the air outlet cavity body and the air outlet guide plate 5 forms a cavity structure for mixed gas exhaust.
The air inlet guide plate 4 is provided with a plurality of first air inlets 4-1 and a plurality of second air inlets 4-3, the second air inlets 4-3 are distributed in an array manner, all or part of the second air inlets 4-3 are provided with air inlet blades 4-2 which are obliquely arranged towards the interior of the cavity of the air inlet cavity 1 and towards the direction of the air outlet cavity 2, and the corresponding second air inlet 4-3 is arranged at the position of the air inlet guide plate 4 corresponding to each air inlet blade 4-2; the first air inlet 4-1 is a larger opening, the second air inlet 4-3 is a smaller opening, and the opening area of the first air inlet 4-1 is larger than that of the second air inlet 4-3. The tail gas to be treated enters the gas inlet cavity 1 through the first gas inlet 4-1 and the second gas inlet 4-3, and the gas inlet blade 4-2 is beneficial to the tail gas to enter the gas inlet cavity 1 through the second gas inlet 4-3 along the guide of the gas inlet blade 4-2.
The air outlet guide plate 5 is provided with a plurality of air outlet blades 5-1 which are obliquely arranged towards the outer side of the cavity of the air outlet cavity 2, and a blade air outlet 5-2 is arranged at the position of the air outlet guide plate 5 corresponding to each air outlet blade 5-1; the treated tail gas is discharged from the blade gas outlet 5-2, and the gas outlet blade 5-1 plays a role in guiding the flow of the treated tail gas in the discharging process.
And the air inlet cavity 1 is also provided with a urea nozzle connecting port 6 for connecting with a urea nozzle 7. The urea injection nozzle 7 injects urea into the intake chamber 1.
In this embodiment, the air inlet blade 4-2 is arranged downward toward the cavity, the direction of the air inlet blade 4-2 is the same as the urea injection direction, and the urea nozzle 7 is inclined downward and injects toward the air outlet cavity 2 below the air inlet cavity 1, so the air inlet blade 4-2 is inclined downward.
Further, the number of the air inlet blades 4-2 is more than one;
the number of the air outlet blades 5-1 is more than one;
the second air inlets 4-3 are distributed in an array, and the number of the first air inlets 4-1 is two or more, and the first air inlets are respectively positioned at two sides of the array formed by the second air inlets 4-3.
Furthermore, in the array formed by the second air inlets 4-3, the second air inlets 4-3 in the row with two sides adjacent to the first air inlet 4-1 are not provided with the air inlet blades 4-2, and in the rest of the second air inlets 4-3, the position of each second air inlet 4-3 is correspondingly provided with one air inlet blade 4-2.
Further, the inclination angle of the air inlet blade 4-2 relative to the air inlet guide plate 4 is 10-60 degrees; the inclination angle of the air outlet blade 5-1 relative to the air inlet guide plate 4 is 10-60 degrees.
Preferably, the inclination angle of the air inlet blade 4-2 relative to the air inlet deflector 4 is 25-45 °; the inclination angle of the air outlet blade 5-1 relative to the air inlet guide plate 4 is 25-45 degrees.
More preferably, the angle of inclination of the inlet vane 4-2 with respect to the inlet baffle 4 is 30 °; the inclination angle of the air outlet blade 5-1 relative to the air inlet guide plate 4 is 30 degrees. Under the inclination angle provided by the invention, the air inlet blade 4-2 and the air outlet blade 5-1 can play a good role in guiding airflow.
Further, the orientation of the air outlet blades 5-1 includes upward, downward, leftward and rightward, and the treated air is guided to be swirled out by arranging the four orientations of the air outlet blades 5-1 on the air outlet cavity 2. That is, the air outlet blade 5-1 comprises an upward air outlet blade 5-1, a downward air outlet blade 5-1, a leftward air outlet blade 5-1 and a rightward air outlet blade 5-1.
Further, the overall orientation of the air outlet blades 5-1 is clockwise or counterclockwise, that is, the air outlet blades are distributed like a windmill. The tail gas treated in this way can be screwed out clockwise or anticlockwise under the guiding action of the air outlet blades 5-1.
Further, a spiral flow guide structure is arranged on the cavity of the air outlet cavity 2, the spiral flow guide structure is in a bent pipe shape, the section of the spiral flow guide structure is in a C shape, and a protruding structure of the spiral flow guide structure rotates clockwise or anticlockwise along the periphery of the cavity of the air outlet cavity 2.
Furthermore, one end of the spiral flow guide structure is communicated with the air inlet cavity 1, and the other end of the spiral flow guide structure is fixedly connected to the cavity of the air outlet cavity 2.
Furthermore, the first bulge 2-2 is arranged on the cavity of the air inlet cavity 1 and matched with the second bulge 1-2, one end of the second bulge 1-2 is provided with a urea nozzle connecting port 6, the other end of the second bulge 1-2 is communicated with the spiral flow guide structure, and the other end of the spiral flow guide structure is fixedly connected to the cavity of the air outlet cavity 2. Therefore, after urea is sprayed out of the urea nozzle 7, the urea flows into the cavity of the air inlet cavity 1 through the urea nozzle connecting port 6, the second protrusions 1-2 play a role in guiding flow, the urea sprayed out of the urea nozzle 7 and the gas in the air inlet cavity 1 are mixed and then flow into the air outlet cavity 2 along the second protrusions 1-2, the second protrusions 1-2 play a role in guiding flow of the gas flow, and finally the mixed gas is discharged through the blade gas outlet 5-2.
Further, the rotating direction of the spiral flow guide structure is opposite to the arrangement direction of the air outlet blades 5-1. If the overall distribution of the air outlet blades 5-1 is clockwise, the first bulges 2-2 of the spiral flow guide structure are arranged anticlockwise, and if the overall distribution of the air outlet blades 5-1 is anticlockwise, the first bulges 2-2 of the spiral flow guide structure are arranged clockwise.
In this embodiment, the air inlet cavity 1 and the air outlet cavity 2 are distributed vertically, and are illustrated as an example, in this embodiment, the air inlet cavity 1 and the air outlet cavity 2 are both circular structures, and the air inlet guide plate 4 and the air outlet guide plate 5 are both circular plates. The second gas inlets 4-3 are distributed in a rectangular array.
The air inlet blades 4-2 are arranged downwards in the cavity, the direction of the blades is consistent with the urea spraying direction, the urea nozzle 7 is inclined downwards and sprays towards the air outlet cavity 2, and therefore the air inlet blades 4-2 are arranged downwards. The first air inlet 4-1 is a longitudinal opening, the air inlet blades 4-2 and the corresponding second air inlets 4-3 are positioned in the center of the air inlet guide plate 4 and arranged in an array, and the first air inlets 4-1 are positioned on two sides of the air inlet blades 4-2. The acute angle between the lower surface of the air inlet blade 4-2 and the air inlet guide plate 4 is 30 degrees.
The orientation of air outlet blades 5-1 is not completely uniform, and the orientation of air outlet blades 5-1 is integrally arranged clockwise or counterclockwise. Taking this embodiment as an example, in this embodiment, the air outlet blade 5-1 includes a plurality of upward-inclined blades, a plurality of leftward-inclined blades, a plurality of downward-inclined blades, and a plurality of rightward-inclined blades, and the air outlet guide plate 5 is divided into four parts by the 4 upward-inclined air outlet blades 5-1, so that when the mixed gas is discharged from the blade air outlet 5-2, the gas is discharged clockwise or counterclockwise under the guiding action of the air outlet blade 5-1. The outlet blades 5-1 may or may not be evenly divided into four orientations, and the number and distribution of the outlet blades 5-1 in different orientations can be properly adjusted according to performance requirements.
The second protrusion 1-2 in this embodiment is a cylindrical protrusion structure, and may be replaced by a rectangular protrusion structure, in order to ensure that the installation position of the urea nozzle 7 is sufficient and to avoid spraying the direct injection wall surface.
When the invention is used, tail gas to be treated enters the air inlet cavity 1 from the first air inlet 4-1 and the second air inlet 4-3, the air inlet blade 4-2 guides the tail gas to enter, the air inlet blade 4-2 which is inclined downwards changes the direction of air flow, urea spray is prevented from being directly blown to the wall surface of the air inlet cavity 1, the tail gas to be treated simultaneously enters the air inlet cavity 1 from the first air inlet 4-1, the temperature of the wall surface of the air inlet cavity 1 is improved, and have certain effect of blowing off to the urea spray, urea nozzle 7 sprays department urea to admitting air in the chamber 1 through urea nozzle connector 6, and the tail gas of pending and urea mix the back and get into and go out the chamber 2, and spiral water conservancy diversion structure can make gaseous intensive mixing, alleviates the risk that the speed at gaseous swirl center is low, makes the gas flow rate more even, reaches the crystallization risk and hangs down, and gas mixing homogeneity and the good effect of velocity of flow homogeneity.
The design of the invention plans the flow direction of the air flow, so that the air flow velocity is more uniform, the effects of low crystallization risk and good air mixing uniformity and flow velocity uniformity are achieved, and the specific analysis is as follows: the air inlet blade 4-2 enables the air flow to flow downwards in the direction, so that the impact of the air flow on urea spray is reduced, and the spray is prevented from being influenced by the air flow and directly impacting a wall surface.
The first air inlet 4-1 enables air flow to directly impact the inner wall of the air inlet cavity 1 and pass along the wall surface of the second bulge 1-2, and the temperature of the wall surface of the air inlet cavity 1 is improved.
The connecting part of the gas inlet cavity 1 and the gas outlet cavity 2 reduces the sectional area of gas flow, accelerates the flow velocity of gas flow and accelerates the mixing of the gas and the urea.
The spiral flow guide structure prolongs the mixing path of the gas and the urea and enables the gas to be dispersed in the cavity of the gas outlet cavity 2.
The air outlet blade 5-1 with the opposite rotation direction to the spiral flow guide structure relieves the speed difference between the central area and the edge area of the vortex, the flow velocity distribution uniformity of the air flow flowing out of the cavity is better, and the reverse blade improves the distribution uniformity of urea and air flow by changing the direction of the air flow.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a tail gas aftertreatment mixing arrangement which characterized in that: the device comprises an air inlet cavity (1) and an air outlet cavity (2) which is rotationally connected and communicated with the air inlet cavity (1);
the air inlet cavity (1) and the air outlet cavity (2) are both hollow structures;
an air inlet guide plate (4) and an air outlet guide plate (5) are respectively arranged on the air inlet cavity (1) and the air outlet cavity (2);
the air inlet guide plate (4) is provided with a plurality of first air inlets (4-1) and a plurality of second air inlets (4-3), the second air inlets (4-3) are distributed in an array mode, all or part of the second air inlets (4-3) are provided with air inlet blades (4-2) which are obliquely arranged towards the cavity of the air inlet cavity (1) and the air outlet cavity (2), the direction of the air inlet blades (4-2) is consistent with the urea injection direction, and the corresponding second air inlets (4-3) are arranged at the positions of the air inlet guide plate (4) corresponding to each air inlet blade (4-2);
a plurality of air outlet blades (5-1) which are obliquely arranged towards the outer side of the cavity of the air outlet cavity (2) are arranged on the air outlet guide plate (5), and a blade air outlet (5-2) is arranged at the position of the air outlet guide plate (5) corresponding to each air outlet blade (5-1);
and the air inlet cavity (1) is also provided with a urea nozzle connecting port (6) used for being connected with a urea nozzle (7).
2. The exhaust aftertreatment mixing arrangement of claim 1, wherein:
the number of the air inlet blades (4-2) is more than one;
the number of the air outlet blades (5-1) is more than one;
the number of the first air inlets (4-1) is two or more, and the first air inlets are respectively positioned at two sides of the array formed by the second air inlets (4-3).
3. The exhaust aftertreatment mixing arrangement of claim 2, wherein: in the array formed by the second air inlets (4-3), the air inlet blades (4-2) are not arranged on the second air inlets (4-3) in the row with two sides adjacent to the first air inlet (4-1), and one air inlet blade (4-2) is correspondingly arranged at the position of each second air inlet (4-3) in the rest second air inlets (4-3).
4. The exhaust aftertreatment mixing arrangement of claim 1, wherein: the inclination angle of the air inlet blade (4-2) relative to the air inlet guide plate (4) is 10-60 degrees; the inclination angle of the air outlet blade (5-1) relative to the air inlet guide plate (4) is 10-60 degrees.
5. The exhaust aftertreatment mixing arrangement of claim 1, wherein: the orientation of the air outlet blade (5-1) comprises upward, downward, leftward and rightward.
6. The exhaust aftertreatment mixing arrangement of claim 5, wherein: the whole orientation of the air outlet blades (5-1) is distributed in a clockwise or anticlockwise windmill shape.
7. The exhaust aftertreatment mixing arrangement of claim 1, wherein: a spiral flow guide structure is arranged on the cavity body of the air outlet cavity (2),
the spiral flow guide structure is a first bulge (2-2) rotating clockwise or anticlockwise along the periphery of the cavity of the air outlet cavity (2).
8. The exhaust aftertreatment mixing arrangement of claim 7, wherein: the spiral flow guide structure is bent, one end of the spiral flow guide structure is communicated with the air inlet cavity (1), and the other end of the spiral flow guide structure is fixedly connected to the cavity of the air outlet cavity (2).
9. The exhaust aftertreatment mixing arrangement of claim 8, wherein: the air inlet cavity (1) is provided with a first bulge (2-2) matched with a second bulge (1-2), one end of the second bulge (1-2) is provided with a urea nozzle connecting port (6), the other end of the second bulge (1-2) is communicated with a spiral flow guide structure, and the other end of the spiral flow guide structure is fixedly connected to the air outlet cavity (2).
10. The exhaust aftertreatment mixing arrangement of claim 7, wherein: the rotating direction of the spiral flow guide structure is opposite to the direction of the gas outlet blades (5-1) in arrangement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911314720.4A CN111156072B (en) | 2019-12-19 | 2019-12-19 | Tail gas aftertreatment mixing arrangement |
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|---|---|---|---|
| CN201911314720.4A CN111156072B (en) | 2019-12-19 | 2019-12-19 | Tail gas aftertreatment mixing arrangement |
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| CN111156072A CN111156072A (en) | 2020-05-15 |
| CN111156072B true CN111156072B (en) | 2021-03-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111821921B (en) * | 2020-06-27 | 2022-03-18 | 淮阴工学院 | Air inlet device of chloromethane reaction tower |
| CN113842724A (en) * | 2021-09-30 | 2021-12-28 | 四川省犍为宝马水泥有限责任公司 | Clinker production tail gas treatment device and treatment method thereof |
| CN114320540B (en) * | 2021-11-25 | 2023-06-20 | 东风商用车有限公司 | Reflux type post-treatment mixer device |
| CN115059529B (en) * | 2022-06-30 | 2024-09-10 | 无锡威孚力达催化净化器有限责任公司 | Urea mixing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4823944B2 (en) * | 2007-03-07 | 2011-11-24 | 日野自動車株式会社 | Exhaust purification device |
| CN108150255B (en) * | 2017-12-23 | 2020-07-28 | 无锡威孚力达催化净化器有限责任公司 | Treating fluid mixing device for vehicle tail gas treatment |
| CN109441603B (en) * | 2018-12-27 | 2024-02-02 | 东风商用车有限公司 | Packaging system between DPF and SCR in tail gas aftertreatment |
| CN110410185B (en) * | 2019-07-03 | 2020-05-08 | 东风商用车有限公司 | Anti-crystallization compact urea mixing device |
| CN110273734A (en) * | 2019-07-25 | 2019-09-24 | 无锡威孚力达催化净化器有限责任公司 | A kind of bidirectional rotational flow cartridge type urea mixing device |
| CN110332034B (en) * | 2019-08-23 | 2024-03-26 | 无锡威孚力达催化净化器有限责任公司 | Vertical SCR post-treatment urea mixing device |
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