CN210799103U - Nozzle integrated SCR aftertreatment urea mixing arrangement - Google Patents
Nozzle integrated SCR aftertreatment urea mixing arrangement Download PDFInfo
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- CN210799103U CN210799103U CN201921529201.5U CN201921529201U CN210799103U CN 210799103 U CN210799103 U CN 210799103U CN 201921529201 U CN201921529201 U CN 201921529201U CN 210799103 U CN210799103 U CN 210799103U
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Abstract
The utility model relates to a SCR aftertreatment urea mixing arrangement, specific nozzle integrated form SCR aftertreatment urea mixing arrangement that says so belongs to SCR aftertreatment urea mixing arrangement technical field. The mixing device comprises a mixing barrel, wherein a front partition plate is arranged in the mixing barrel and is positioned at the front part of a rotational flow hole pipe, and a channel for communicating rotational flow blade sections of the rotational flow hole pipe is arranged on the front partition plate; the upper portion of the front partition plate is provided with an upper purging window, the upper purging window faces the cyclone blade section of the cyclone hole pipe, the lower portion of the front partition plate is provided with a lower purging window, and the lower purging window faces the mesh section of the cyclone hole pipe. The utility model can effectively reduce the risk of urea crystallization by arranging the blowing window on the clapboard, greatly improves the gas mixing efficiency and ensures the tail gas treatment effect; the pressure relief groove of the rear clapboard can effectively reduce the back pressure so as to meet the back pressure requirement of the whole post-treatment system.
Description
Technical Field
The utility model relates to a SCR aftertreatment urea mixing arrangement, specific nozzle integrated form SCR aftertreatment urea mixing arrangement that says so belongs to SCR aftertreatment urea mixing arrangement technical field.
Background
With the stricter emission regulations of diesel engines, the exhaust gas after-treatment technology is a technical measure which must be adopted. The SCR can meet the national IV and V emission standards, the basic principle of the SCR is that a urea aqueous solution with the concentration of 32.5 percent is atomized by a urea injection system (commonly called a urea pump) and then is injected into an exhaust pipe to be mixed with tail gas of an engine, and the urea aqueous solution is subjected to pyrolysis and hydrolysis reaction to generate ammonia (NH)3) Under the action of catalyst, the ammonia gas converts harmful nitrogen oxide (NOx) in the tail gas of diesel engine into harmless nitrogen gas (N)2) And water, the first task of the engine exhaust treatment technology SCR route is to fully mix and chemically react the exhaust with ammonia mist, and simultaneously ensure sufficient temperature before entering the catalyst. SCR among the prior art has tail gas and ammonia insufficient mixing problem in handling the automobile exhaust in-process, causes the condition of urea crystallization to take place easily to cause the tail gas treatment incomplete, influence the tail gas treatment effect.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned weak point to a nozzle integrated form SCR aftertreatment urea mixing arrangement is provided, through set up the window that sweeps on the baffle, can effectively reduce urea crystallization risk, greatly improved gas mixing efficiency, guaranteed the tail gas treatment effect.
According to the technical scheme provided by the utility model, nozzle integrated form SCR aftertreatment urea mixing arrangement is equipped with the whirl hole pipe including mixing the barrel perpendicularly in the mixing barrel, whirl hole pipe upper portion surface is equipped with the whirl blade, whirl hole pipe lower part surface is equipped with the mesh, and the blanking cover, characterized by are connected to whirl hole pipe lower extreme: a supporting plate is arranged between the middle part of the rotational flow hole pipe and the side wall of the mixing barrel, a U-shaped partition plate is arranged at the lower end of the rotational flow hole pipe, a mesh section of the rotational flow hole pipe extends between two end plates of the U-shaped partition plate, and the opening end of the U-shaped partition plate extends to the supporting plate;
a front partition plate is arranged in the mixing barrel and is positioned at the front part of the rotational flow hole pipe, and a passage communicated with rotational flow blade sections of the rotational flow hole pipe is arranged on the front partition plate; the upper part of the front partition plate is provided with an upper purging window facing the cyclone blade section of the cyclone hole pipe, the lower part of the front partition plate is provided with a lower purging window facing the mesh section of the cyclone hole pipe; a rear partition plate is arranged in the mixing barrel and is positioned at the rear part of the rotational flow hole pipe, a plurality of pressure relief grooves are formed in the rear partition plate and are communicated with the mesh section of the rotational flow hole pipe; and a rotational flow partition plate is arranged at the rear end of the rear partition plate, and a plurality of rotational flow holes are formed in the rotational flow partition plate.
Furthermore, a mixing fin is arranged on one side of the pressure relief groove.
Furthermore, a plurality of swirl holes are uniformly distributed along the circumferential direction, and swirl mixing blades are arranged at the edges of the swirl holes.
Compared with the prior art, the utility model has the advantages that:
the utility model has simple, compact and reasonable structure, and can effectively reduce the risk of urea crystallization by arranging the blowing and sweeping window on the clapboard, thereby greatly improving the gas mixing efficiency and ensuring the tail gas treatment effect; the pressure relief groove of the rear clapboard can effectively reduce the back pressure so as to meet the back pressure requirement of the whole post-treatment system.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a three-dimensional semi-sectional view of the present invention.
Fig. 3 is a perspective view of the front bulkhead.
Fig. 4 is a perspective view of the rear partition.
Description of reference numerals: 1-mixing cylinder, 2-front baffle, 2.1-upper blowing window, 2.2-lower blowing window, 3-rear baffle, 3.1-pressure relief groove, 3.2-mixing fin, 4-swirl hole tube, 5-blanking cover, 6-support plate, 7-U-shaped baffle, 8-swirl baffle and 8.1-swirl mixing blade.
Detailed Description
The invention will be further described with reference to the embodiments shown in the drawings to which:
as shown in fig. 1-4, the utility model discloses mainly including mixing barrel 1, be equipped with whirl hole pipe 4 in mixing barrel 1 perpendicularly, 4 upper portion surfaces of whirl hole pipe are equipped with the whirl blade, 4 lower part surfaces of whirl hole pipe are equipped with the mesh, and blanking cover 5 is connected to 4 lower extremes of whirl hole pipe.
A supporting plate 6 is arranged between the middle part of the rotational flow hole pipe 4 and the side wall of the mixing cylinder body 1, and the supporting plate 6 plays a supporting role in supporting the rotational flow hole pipe 4. The lower end of the rotational flow hole pipe 4 is provided with a U-shaped partition plate 7, the mesh section of the rotational flow hole pipe 4 extends into the space between two end plates of the U-shaped partition plate 7, and the open end of the U-shaped partition plate 7 extends to the support plate 6.
The mixing barrel 1 is internally provided with a front partition plate 2, the front partition plate 2 is positioned at the front part of the rotational flow hole pipe 4, and the front partition plate 2 is provided with a channel communicated with rotational flow blade sections of the rotational flow hole pipe 4.
The upper part of the front partition board 2 is provided with an upper purging window 2.1, the upper purging window 2.1 faces the cyclone blade section of the cyclone hole pipe 4, the lower part of the front partition board 2 is provided with a lower purging window 2.2, and the lower purging window 2.2 faces the mesh section of the cyclone hole pipe 4. In operation, the upper purge window 2.1 is used to purge the upper gas flow and the lower purge window 2.2 is used to purge the mesh zone of possible crystallization.
The mixing barrel body 1 is internally provided with a rear partition plate 3, the rear partition plate 3 is positioned at the rear part of the rotational flow hole pipe 4, the rear partition plate 3 is provided with a plurality of pressure relief grooves 3.1, and the pressure relief grooves 3.1 are communicated with the mesh section of the rotational flow hole pipe 4. Pressure release tank 3.1 one side is equipped with mixing fin 3.2, and mixing fin 3.2 can further improve the mixed effect of urea and tail gas. The pressure relief groove of the rear clapboard can effectively reduce the back pressure so as to meet the back pressure requirement of the whole post-treatment system.
The rear end of the rear partition plate 3 is provided with a cyclone partition plate 8, the cyclone partition plate 8 is provided with a plurality of cyclone holes, the plurality of cyclone holes are uniformly distributed along the circumferential direction, and the edge of each cyclone hole is provided with a cyclone mixing blade 8.1.
The utility model discloses a theory of operation is: during the specific use, the air inlet that will mix the barrel is connected with automobile engine's blast pipe, automobile engine's tail gas gets into preceding baffle the place ahead through the air inlet, then gets into the whirl blade section of whirl hole pipe through the passageway of preceding baffle, urea solution passes through the whirl blade section that the nozzle got into whirl hole pipe, after mixing through whirl hole pipe and preceding baffle, mist got into the mesh section and the intensive mixing of whirl hole pipe, got into the whirl baffle by the back baffle at last, handled through the catalyst behind the further misce bene of whirl baffle.
The utility model has simple, compact and reasonable structure, and can effectively reduce the risk of urea crystallization by arranging the blowing and sweeping window on the clapboard, thereby greatly improving the gas mixing efficiency and ensuring the tail gas treatment effect; the pressure relief groove of the rear clapboard can effectively reduce the back pressure so as to meet the back pressure requirement of the whole post-treatment system.
Claims (3)
1. The utility model provides a nozzle integrated form SCR aftertreatment urea mixing arrangement, includes and mixes barrel (1), is equipped with whirl hole pipe (4) perpendicularly in mixing barrel (1), and whirl hole pipe (4) upper portion surface is equipped with the whirl blade, and whirl hole pipe (4) lower part surface is equipped with the mesh, and blanking cover (5), characterized by are connected to whirl hole pipe (4) lower extreme: a supporting plate (6) is arranged between the middle part of the rotational flow hole pipe (4) and the side wall of the mixing barrel body (1), a U-shaped partition plate (7) is arranged at the lower end of the rotational flow hole pipe (4), a mesh section of the rotational flow hole pipe (4) extends into a position between two end plates of the U-shaped partition plate (7), and the opening end of the U-shaped partition plate (7) extends to the supporting plate (6);
a front partition plate (2) is arranged in the mixing barrel (1), the front partition plate (2) is positioned at the front part of the rotational flow hole pipe (4), and a channel communicated with rotational flow blade sections of the rotational flow hole pipe (4) is arranged on the front partition plate (2); an upper purging window (2.1) is arranged at the upper part of the front partition plate (2), the upper purging window (2.1) faces a swirl blade section of the swirl hole pipe (4), a lower purging window (2.2) is arranged at the lower part of the front partition plate (2), and the lower purging window (2.2) faces a mesh section of the swirl hole pipe (4); a rear partition plate (3) is arranged in the mixing barrel (1), the rear partition plate (3) is positioned at the rear part of the rotational flow hole pipe (4), a plurality of pressure relief grooves (3.1) are formed in the rear partition plate (3), and the pressure relief grooves (3.1) are communicated with the mesh section of the rotational flow hole pipe (4); the rear end of the rear partition plate (3) is provided with a rotational flow partition plate (8), and the rotational flow partition plate (8) is provided with a plurality of rotational flow holes.
2. The nozzle-integrated SCR aftertreatment urea mixing device of claim 1, wherein: and a mixing fin (3.2) is arranged on one side of the pressure relief groove (3.1).
3. The nozzle-integrated SCR aftertreatment urea mixing device of claim 1, wherein: the plurality of swirl holes are uniformly distributed along the circumferential direction, and swirl mixing blades (8.1) are arranged at the edges of the swirl holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921529201.5U CN210799103U (en) | 2019-09-12 | 2019-09-12 | Nozzle integrated SCR aftertreatment urea mixing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921529201.5U CN210799103U (en) | 2019-09-12 | 2019-09-12 | Nozzle integrated SCR aftertreatment urea mixing arrangement |
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| Publication Number | Publication Date |
|---|---|
| CN210799103U true CN210799103U (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921529201.5U Active CN210799103U (en) | 2019-09-12 | 2019-09-12 | Nozzle integrated SCR aftertreatment urea mixing arrangement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439659A (en) * | 2019-09-12 | 2019-11-12 | 无锡威孚力达催化净化器有限责任公司 | Nozzle integrated form SCR post-processes urea mixing device |
| CN114542247A (en) * | 2022-01-18 | 2022-05-27 | 潍柴动力股份有限公司 | SCR system and engine |
-
2019
- 2019-09-12 CN CN201921529201.5U patent/CN210799103U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439659A (en) * | 2019-09-12 | 2019-11-12 | 无锡威孚力达催化净化器有限责任公司 | Nozzle integrated form SCR post-processes urea mixing device |
| CN114542247A (en) * | 2022-01-18 | 2022-05-27 | 潍柴动力股份有限公司 | SCR system and engine |
| CN114542247B (en) * | 2022-01-18 | 2023-04-18 | 潍柴动力股份有限公司 | SCR system and engine |
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