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Mixing device with multi-rotational-flow structure

A technology of mixing device and swirl plate, which is applied in the direction of muffler, exhaust device, exhaust treatment, etc., can solve problems such as uneven mixing of ammonia gas, easy crystallization of urea, and excessive size of the mixer, so as to reduce the risk of crystallization , Low risk of crystallization

Active Publication Date: 2021-11-02
WUXI WEIFU LIDA CATALYTIC CONVERTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing structure has problems such as easy crystallization of urea, uneven mixing of ammonia gas, excessive exhaust back pressure of the mixer structure, and excessive size of the mixer.

Method used

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  • Mixing device with multi-rotational-flow structure
  • Mixing device with multi-rotational-flow structure
  • Mixing device with multi-rotational-flow structure

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Embodiment 1

[0027] Such as Figure 1-4 As shown, a multi-swirl structure mixing device includes a cylinder body 1, the two ends of the cylinder body 1 are open, the side wall is provided with a nozzle base 2, and the inside of the cylinder body 1 is provided with a swirl flow structure. The swirl structure includes an upper crushing plate 3, a lower crushing orifice plate 4, a baffle 5, a swirl tube 6 and a swirl plate 7, one end of the swirl tube 6 is connected to the baffle 5, and the other end is connected to the swirl On the plate 7, the baffle plate 5 is arranged at the inlet end of the cylinder body 1, the swirl plate 7 is arranged at the gas outlet end of the cylinder body 1, the upper crushing plate 3 and the lower crushing orifice plate 4 It is arranged inside the barrel 1 where the nozzle base 2 is located, and the lower ends of the upper crushing plate 3 and the lower crushing orifice 4 are connected to the swirl tube 6 , and the left sides are fixed on the baffle 5 .

[0028]...

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Abstract

The invention belongs to the technical field of diesel engine tail gas after-treatment, and particularly relates to a mixing device with a multi-rotational-flow structure. The mixing device comprises a barrel body with two open ends and a nozzle base arranged on the side wall of the barrel body, the rotational-flow structure is arranged in the barrel body, the rotational-flow structure comprises an upper crushing plate, a lower crushing pore plate, a baffle, a rotational-flow pipe and a rotational-flow plate, one end of the rotational-flow pipe is connected to the baffle, the other end of the rotational-flow pipe is connected to the rotational-flow plate, the baffle is arranged at one end of the barrel body, the rotational-flow plate is arranged at the other end of the barrel body, the upper crushing plate and the lower crushing pore plate are arranged in the position, where the nozzle base is located, of the barrel body, the lower ends of the upper crushing plate and the lower crushing pore plate are both connected to the rotational-flow pipe, and the left sides are both fixed to the baffle. The mixing device is good in urea distribution uniformity, urea is not prone to crystallization, it can be ensured that the urea can be evenly distributed on the end surface of an SCR carrier, exhausted gas and ammonia gas are evenly mixed, and it is ensured that the SCR can work efficiently and stably.

Description

technical field [0001] The invention belongs to the technical field of post-treatment of diesel engine exhaust, and in particular relates to a mixing device with a multi-swirl structure. Background technique [0002] At present, with the development of the national diesel vehicle exhaust pollutant emission standard to the Euro VI stage, the more stringent emission standard has a stricter definition of exhaust pollutants. SCR (Selective Catalytic Reduction Converter) technology has become the first choice of major domestic OEMs. The principle of SCR technology is to use the NH produced by the decomposition of urea 3 , under the action of catalyst, with NO X The reaction produces N 2 , thereby reducing NO in the exhaust X , to treat the exhaust gas to meet Euro VI emission standards. [0003] The mixer is usually arranged before the SCR, and at the back end of the DOC and DPF, that is to form a series structure of DOC-DPF-mixer-SCR. Exhaust is discharged into the atmosph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N3/20
CPCF01N3/2892F01N3/2066F01N2610/02Y02A50/20Y02T10/12
Inventor 张旭陈增响付细平何伟娇周稳超陆超俊张磊周磊
Owner WUXI WEIFU LIDA CATALYTIC CONVERTER
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