CN219242022U - Mixer and aftertreatment device - Google Patents
Mixer and aftertreatment device Download PDFInfo
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- CN219242022U CN219242022U CN202222079097.2U CN202222079097U CN219242022U CN 219242022 U CN219242022 U CN 219242022U CN 202222079097 U CN202222079097 U CN 202222079097U CN 219242022 U CN219242022 U CN 219242022U
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Abstract
The utility model relates to the technical field of mixers, in particular to a mixer and a post-treatment device, which comprises: the utility model provides a shell, supporting component, whirl subassembly, rectifying plate with form between the shell and be used for holding supporting component hold the chamber, supporting component with the inside wall of shell is connected, is used for with hold the chamber and divide into first mixing chamber and second mixing chamber, first mixing chamber with the second mixing chamber passes through the via hole intercommunication that supporting component offered, whirl subassembly set up in the inside of second mixing chamber, and with supporting component connects, set up on the shell be used for with first air inlet of first mixing chamber intercommunication and with the second air inlet of second mixing chamber intercommunication, be used for making first mixing chamber with the inside gas of second mixing chamber carries out the whirl, has increased the mixing efficiency of air current and to the purification efficiency of waste gas, reduces the emission pollution of waste gas.
Description
Technical Field
The utility model relates to the technical field of mixers, in particular to a mixer and a post-treatment device.
Background
The selective catalytic reduction mixer is a device for mixing waste gas and urea, urea is atomized and decomposed into ammonia gas, and is used as a reducing agent to react with nitrogen oxides, and a compact mixer for straight cylinder type post-treatment of a heavy platform and a part of non-road platform in a diesel engine at present is provided, but the problems of poor gas mixing uniformity and treatment conversion efficiency exist.
Disclosure of Invention
The utility model discloses a mixer and a post-treatment device, which are used for improving the mixing uniformity of gases and enhancing the conversion efficiency of gas treatment.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
in a first aspect, the present utility model provides a mixer comprising: the device comprises a shell, a supporting component, a cyclone component and a rectifying plate;
the rectifying plate set up in the inside wall of casing and offered the gas outlet, be used for with external intercommunication, the rectifying plate with form between the casing and be used for holding supporting component hold the chamber, supporting component with the inside wall of casing is connected, is used for with hold the chamber divide into first mixing chamber and second mixing chamber, first mixing chamber with the second mixing chamber passes through the via hole intercommunication that supporting component offered, swirl component set up in the inside of second mixing chamber, and set up in via hole department, set up on the casing be used for with first air inlet of first mixing chamber intercommunication and with the second air inlet of second mixing chamber intercommunication, swirl component orientation the second air inlet for make the gas of first mixing chamber inside carries out the whirl.
The utility model is provided with the cyclone component for mixing the external urea water mist and the waste gas, when the waste gas is required to be purified, the waste gas in the first mixing cavity can enter the cyclone component through the passing holes, and the state of cyclone is kept when the waste gas enters the cyclone component, and when the urea water mist enters the cyclone component, the position of the first air inlet and the opening position of the cyclone component are in the same direction, so that the urea water mist has an initial speed parallel to the axis of the cyclone component, namely two air flows collide in the cyclone component, and the cyclone component rotates with the mixed gas when colliding, thereby better mixing the waste gas and the urea water mist, improving the mixing efficiency of the air flows and the purification efficiency of the waste gas and reducing the emission pollution of the waste gas.
In addition this application is provided with the rectifying plate that is used for the rebound air current, carries out preliminary mixing back between waste gas and urea water smoke, when needs by the inside exhaust of casing, the gas mixture can collide with the rectifying plate to make the gas mixture can further rebound to the inside of second mixing chamber, carry out secondary backward flow and mix, improved the mixing efficiency between waste gas and the urea water smoke to a certain extent, thereby further reduce the harmful substance content that contains in the exhaust gas.
Optionally, the cyclone assembly comprises a conical cyclone tube and a turbofan connected with the conical cyclone tube, wherein the turbofan is arranged at the position of the through hole and is used for driving the gas in the first mixing cavity to be conveyed into the conical cyclone tube.
Optionally, the device further comprises a hollowed-out part arranged on the conical swirl tube, wherein the hollowed-out part comprises a plurality of diversion holes, and the diversion holes are arranged in a ring shape along the axis of the conical swirl tube.
Optionally, the supporting component includes preceding backup pad, back backup pad and with preceding backup pad and back backup pad be connected well backup pad, preceding backup pad with back backup pad connect respectively in the inside wall of casing, just form the opening orientation between the inside wall of preceding backup pad and casing the alpha angle of rectifying plate, form the opening between the inside wall of back backup pad and casing and deviate from the theta angle of rectifying plate.
Optionally, the θ angle ranges from:
30°≤θ≤90°。
optionally, the range of the angle α is:
30°≤α≤90°。
optionally, the device further comprises a first flat plate welded to the inner side wall of the shell and not in contact with the support assembly.
Optionally, the air conditioner further comprises a plurality of cyclone plates, the cyclone plates are arranged on the rectifying plate, the cyclone plates are arranged around the axis direction of the rectifying plate, and the air outlet is arranged between the adjacent cyclone plates and is in an integral structure with the rectifying plate.
Optionally, a plurality of first through holes are formed in the first flat plate, and a plurality of second through holes are formed in the middle supporting plate.
In a second aspect, the present utility model provides an aftertreatment device, including the above-described mixer, in communication with the mixer, employing selective catalytic reduction system technology.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is an exploded view of the overall structure of the present utility model;
FIG. 3 is a schematic view of a first plate structure according to the present utility model;
FIG. 4 is a schematic view of a support assembly according to the present utility model;
FIG. 5 is a schematic view of the supporting assembly and housing assembly of the present utility model;
FIG. 6 is a schematic view of a turbofan structure according to the present utility model;
FIG. 7 is another angular schematic view of a turbofan structure according to the present utility model;
FIG. 8 is a schematic view of a conical cyclone tube structure according to the present utility model;
FIG. 9 is a front view of a structure of a rectifier board according to the present utility model;
FIG. 10 is a side view of a fairing of the present utility model;
FIG. 11 is a top view of a structure of a rectifier board according to the present utility model;
FIG. 12 is a schematic diagram of a selective catalytic reduction system according to the present utility model.
In the figure: 1-shell, 11-second air inlet, 12-first air inlet, 2-first flat plate, 21-first through hole, 3-middle supporting plate, 31-front supporting plate, 32-back supporting plate, 33-through hole, 34-second through hole, 4-conical swirl tube, 41-diversion hole, 5-turbofan, 6-rectification plate and 61-swirl plate.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 11, in a first aspect, the present utility model provides a mixer comprising: the device comprises a shell 1, a supporting component, a cyclone component and a rectifying plate 6;
the rectifying plate 6 is arranged on the inner side wall of the shell 1 and is provided with an air outlet for being communicated with the outside, a containing cavity for containing a supporting component is formed between the rectifying plate 6 and the shell 1, the supporting component is connected with the inner side wall of the shell 1 and is used for dividing the containing cavity into a first mixing cavity and a second mixing cavity, the first mixing cavity is communicated with the second mixing cavity through a through hole 33 formed in the supporting component, the cyclone component is arranged in the second mixing cavity and is arranged at the position of the through hole 33, a first air inlet 12 for being communicated with the first mixing cavity and a second air inlet 11 for being communicated with the second mixing cavity are formed in the shell 1, and the cyclone component faces towards the direction of the second air inlet 11 and is used for enabling gas in the first mixing cavity and the second mixing cavity to swirl.
The utility model is provided with the cyclone component for mixing the external urea water mist and the waste gas, when the waste gas is required to be purified, the waste gas in the first mixing cavity can enter the cyclone component through the passing hole 33, and the state of cyclone is kept when the waste gas enters the cyclone component, and when the urea water mist enters the cyclone component, the position of the first air inlet 12 and the opening position of the cyclone component are in the same direction, so that the urea water mist can have an initial speed parallel to the axis of the cyclone component when entering the cyclone component on the basis, namely, two airflows collide in the cyclone component, and the cyclone component rotates with the mixed gas when colliding, thereby better mixing between the waste gas and the urea water mist can be realized, the mixing efficiency of the airflows and the purification efficiency of the waste gas are improved, and the emission pollution of the waste gas is reduced.
In addition this application is provided with the rectification board 6 that is used for the rebound air current, carries out preliminary mixing back between waste gas and urea water smoke, when needs by the inside exhaust of casing 1, the mixed gas can collide with rectification board 6 to make the inside that the mixed gas can further rebound to the second mixing chamber, carry out secondary backward flow and mix, improved the mixing efficiency between waste gas and the urea water smoke to a certain extent, thereby further reduce the harmful substance content that contains in the exhaust gas.
In a possible implementation manner, as shown in fig. 3, a plurality of first through holes 21 are formed in the first plate 2, and a plurality of second through holes 34 are formed in the middle support plate 3.
In a possible implementation manner, as shown in fig. 4 and 5, the support assembly includes a front support plate 31, a rear support plate 32, and a middle support plate 3 connected to the front support plate 31 and the rear support plate 32, the front support plate 31 and the rear support plate 32 are welded to the inner side wall of the housing 1, respectively, and an angle α is formed between the front support plate 31 and the inner side wall of the housing 1, in which the opening between the rear support plate 32 and the inner side wall of the housing 1 faces away from the rectifying plate 6, and an angle θ is formed between the opening between the rear support plate 32 and the inner side wall of the housing 1.
In one possible implementation, the range of θ angles is:
in the application, the angle formed between the rear supporting plate 32 and the inner side wall of the shell 1 is not too large or too small, the volume of the second mixing cavity is increased, uniform mixing is facilitated, and air flows enter the conical cyclone tube 4 through the second through holes 34 and the turbofan 5 to be contacted with urea for uniform mixing, so that harmful substances such as nitrogen oxides in tail gas are removed, and the requirement of regulation emission is met.
Optionally, the range of α angles is:
in the above structure, the volume of the first mixing chamber can be increased by matching with the angle theta, so that more exhaust gas can be conveniently contained for conveying and supplying the exhaust gas to the second containing chamber.
In a possible implementation manner, as shown in fig. 6-8, the cyclone assembly includes a conical cyclone tube 4 and a turbofan 5 connected with the conical cyclone tube 4, where the turbofan 5 is disposed at a position of the via hole 33 and is used for driving gas inside the first mixing cavity to be delivered to the inside of the conical cyclone tube 4, in the above structure, the turbofan 5 may be directly welded inside the via hole 33 formed in the middle support plate 3, during use, most of the waste gas entering the first mixing cavity enters the conical cyclone tube 4 from the turbofan 5, at this time, the waste gas inside the conical cyclone tube 4 collides with and rotates with urea water mist to further fuse, and meanwhile, by virtue of nitrogen in urea, chemical reaction is performed on harmful impurities in waste to complete purification of the waste gas.
In a possible implementation manner, the turbofan 5 may be clamped with the middle support plate 3, a first clamping part is arranged on the turbofan 5, a second clamping part clamped with the first clamping part is arranged on the middle support plate 3, and in a clamping manner, the installation process can be simpler and more effective in the installation process.
In a possible implementation manner, as shown in fig. 8, the device further includes a hollow portion disposed on the conical swirl tube 4, the hollow portion includes a plurality of diversion holes 41, the diversion holes 41 are annularly arranged along the axis of the conical swirl tube 4, during the use process of the device, exhaust gas enters the interior of the first mixing cavity from the first air inlet 12, most of the exhaust gas enters the interior of the conical swirl tube 4 from the turbofan 5, but because the first air inlet 12 continuously carries out gas delivery, a part of the gas enters the interior of the second receiving cavity from the second through holes 34 formed on the middle support plate 3, and the gas is filled around the conical swirl tube 4, but because the turbofan 5 continuously rotates, the part of the gas also rotates along with the turbofan 5, urea water mist in the interior of the conical swirl tube 4 is spread into the interior of the second receiving cavity from the diversion holes 41, the rotating gas flow mixes the urea water with the exhaust gas to the greatest extent, and the mixing efficiency of the gas is improved.
In the mode of possible realization, still include first dull and stereotyped 2, first dull and stereotyped 2 welds in the inside wall of casing 1, and with supporting component non-contact, thereby at the inside that gets into first mixing chamber by first through-hole 21 can be got into by first air inlet 12 waste gas some, simultaneously under the effect of first through-hole 21, can adjust air current direction, speed, the air current velocity of flow in making the blender is more even through first dull and stereotyped 2, first dull and stereotyped 2 is non-contact with supporting component simultaneously, can make first dull and stereotyped 2 have certain displacement in the axis direction along casing 1, thereby can carry out certain buffering with the impact force that first dull and stereotyped 2 received in the right moment of contacting waste gas, the life of extension first dull and stereotyped 2.
In the mode that probably realizes, still include a plurality of whirl boards 61, a plurality of whirl boards 61 set up on rectification board 6, a plurality of whirl boards 61 are arranged around rectification board 6 axis direction, the gas outlet sets up between adjacent whirl boards 61, and with rectification board 6 structure as an organic whole, in the above-mentioned structure, there is not the opening on the rectification board 6, thereby can block the air current and directly flow out, rebound the inside to the second chamber that holds with the gas that contacts of rectification board 6, carry out secondary mixing to the backward flow between the mixed gas, reinforcing mixing effect, design a plurality of whirl boards 61 in the latter half of rectification board 6 simultaneously, and be provided with the gas outlet that is used for exporting gas, be used for carrying out further discharge with waste gas, reduce the content of harmful substance in the waste gas simultaneously, in addition gas can collide with whirl board 61 after carrying to the surface of whirl board 61, and whirl board 61 sets up for rectification board 6 slope, can make the gas take place certain rotation, form secondary mixing promptly, and integrated structure, the stability of being connected between whirl board 61 and rectification board 6, when facing the gas carries the required process of integral type can be guaranteed in the conveying the required process intensity.
As shown in fig. 12, in a second aspect, the present utility model provides an aftertreatment device, including the above-mentioned mixer, where the aftertreatment device is in communication with the mixer, and a selective catalytic reduction system technology is adopted, and in the process of use, after the exhaust gas is mixed in the interior of the housing 1 in the mixer, the exhaust gas enters the interior of the aftertreatment device immediately, and urea is decomposed in the next step.
Basic operating principle of selective catalytic reduction system: exhaust gas flows out of the turbine of the supercharger and then enters the exhaust pipe, and meanwhile, a urea injection unit arranged on the exhaust pipe injects quantitative urea aqueous solution into the exhaust pipe in a mist form, urea droplets undergo hydrolysis and pyrolysis reaction under the action of high-temperature exhaust gas, so that the required reducer ammonia (NH) is generated 3 ) Ammonia (NH) 3 ) Under the action of catalyst, nitrogen oxide (NO x ) Selectively reduced to nitrogen (N) 2 ) The reaction scheme is shown in FIG. 12. Sometimes in order to prevent excessive ammonia (NH) 3 ) Escape to cause secondary pollution, and ammonia (NH) is promoted after the selective catalytic reduction catalyst 3 ) Oxidation to nitrogen (N) 2 ) Is a catalyst of (a).
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (10)
1. A mixer, comprising: the device comprises a shell, a supporting component, a cyclone component and a rectifying plate;
the rectifying plate set up in the inside wall of casing and offered the gas outlet, be used for with external intercommunication, the rectifying plate with form between the casing and be used for holding supporting component hold the chamber, supporting component with the inside wall of casing is connected, is used for with hold the chamber divide into first mixing chamber and second mixing chamber, first mixing chamber with the second mixing chamber passes through the via hole intercommunication that supporting component offered, swirl component set up in the inside of second mixing chamber, and set up in via hole department, set up on the casing be used for with first air inlet of first mixing chamber intercommunication and with the second air inlet of second mixing chamber intercommunication, swirl component orientation the second air inlet for make the gas of first mixing chamber inside carries out the whirl.
2. The mixer of claim 1, wherein the swirl assembly comprises a conical swirl tube and a turbofan connected to the conical swirl tube, the turbofan being disposed at the via location for driving gas inside the first mixing chamber to be delivered to the interior of the conical swirl tube.
3. The mixer of claim 2, wherein the swirl assembly further comprises a hollowed portion disposed in the tapered swirl tube, the hollowed portion comprising a plurality of deflector holes arranged in a ring-like manner along the axis of the tapered swirl tube.
4. The mixer of claim 1, wherein the support assembly comprises a front support plate, a rear support plate, and a middle support plate connected to the front support plate and the rear support plate, the front support plate and the rear support plate are respectively connected to the inner side walls of the housing, an angle alpha is formed between the front support plate and the inner side walls of the housing, the opening faces the rectifying plate, and an angle theta is formed between the rear support plate and the inner side walls of the housing, the opening faces away from the rectifying plate.
5. The mixer of claim 4, wherein the θ is in the range of:
30°≤θ≤90°。
6. the mixer of claim 4, wherein the alpha angle ranges from:
30°≤α≤90°。
7. the mixer of claim 4 further comprising a first plate welded to the inner sidewall of the housing and not in contact with the support assembly.
8. The mixer of claim 1, further comprising a plurality of swirl plates disposed on the rectifying plate, the plurality of swirl plates being arranged about the axis of the rectifying plate, the air outlet being disposed between adjacent swirl plates and being of unitary construction with the rectifying plate.
9. The mixer of claim 7, wherein the first plate has a plurality of first through holes and the middle support plate has a plurality of second through holes.
10. An aftertreatment device comprising a mixer according to any one of claims 1-9, wherein the aftertreatment device is in communication with the mixer using selective catalytic reduction system technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222079097.2U CN219242022U (en) | 2022-08-09 | 2022-08-09 | Mixer and aftertreatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222079097.2U CN219242022U (en) | 2022-08-09 | 2022-08-09 | Mixer and aftertreatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219242022U true CN219242022U (en) | 2023-06-23 |
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ID=86846475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222079097.2U Active CN219242022U (en) | 2022-08-09 | 2022-08-09 | Mixer and aftertreatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219242022U (en) |
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2022
- 2022-08-09 CN CN202222079097.2U patent/CN219242022U/en active Active
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