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Mixing device for spraying at upper end of U-shaped end cover

A mixing device and end cap technology, which is applied in the direction of muffler, exhaust device, exhaust treatment, etc., can solve the problems of increasing the risk of urea crystallization, and achieve the effect of improving the uniformity index of ammonia mixing, reducing risk and increasing distance

Active Publication Date: 2020-12-01
WUXI WEIFU LIDA CATALYTIC CONVERTER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This arrangement increases the risk of urea crystallization at the lower end of the nozzle

Method used

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  • Mixing device for spraying at upper end of U-shaped end cover
  • Mixing device for spraying at upper end of U-shaped end cover
  • Mixing device for spraying at upper end of U-shaped end cover

Examples

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific drawings.

[0028] Such as figure 1 and image 3 As shown, a mixing device for injection at the upper end of a U-shaped end cap, including a fixedly connected connecting end cap 1 and an end cap 5, the upper part of the connecting end cap 1 has a circular air inlet, and the lower part has a circular outlet. Air port, the top of the end cover 5 is provided with a base 6, and the nozzle 7 is provided on the base 6; it is characterized in that the first flow guiding device is fixed on the connecting end cover 1 corresponding to the position of the air inlet, and on the connecting end cover 1 corresponding to the position of the air outlet fixing the second deflector;

[0029] Such as image 3 and Figure 4 As shown, the first deflector device includes a first deflector 2, a second deflector 4 and a sealing plate 3, the first deflector 2 and the second deflector 4 have the same structure ...

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Abstract

The invention relates to a mixing device for spraying at the upper end of a U-shaped end cover. The mixing device comprises a connecting end cover and an end cover which are fixedly connected, a baseis arranged at the top of the end cover, and a nozzle is arranged on the base; a first flow guide device is fixed to the position, corresponding to an air inlet, of the connecting end cover, and a second flow guide device is fixed to the position, corresponding to an air outlet, of the connecting end cover; the first flow guide device comprises a first flow guide plate, a second flow guide plate and a sealing plate; the second flow guide device comprises a third flow guide plate and a fourth flow guide plate which are fixedly connected, the third flow guide plate comprises a surface plate at the upper part and an arc-shaped panel at the lower part, and air guide holes are uniformly distributed in the arc-shaped panel; and the fifth flow guide plate is arranged in an air outlet cover, and athird mixing cavity is formed between the fifth flow guide plate and the fourth flow guide plate. According to the SCR mixing device capable of reducing urea crystallization as much as possible, an SCR carrier is prevented from being blocked, and therefore stable operation of SCR is guaranteed.

Description

technical field [0001] The invention relates to a mixing device used for injection at the upper end of a U-shaped end cover, and belongs to the field of aftertreatment equipment for diesel engine exhaust. Background technique [0002] With the development of the national diesel vehicle exhaust pollutant emission standard to the Euro VI stage, SCR (Selective Catalytic Reduction Converter) technology has become the first choice of major domestic OEMs. The SCR technology requires a urea mixer to be arranged at the front end of the SCR, and the urea aqueous solution is injected into the mixer, and the urea is evenly distributed on the front end of the SCR through the crushing and mixing of the mixer. [0003] In the existing U-shaped post-treatment of commercial vehicles in the National VI stage, in order to increase the distance of urea mixing, it is necessary to place the nozzle on the upper end of the end cover. This arrangement increases the risk of urea crystallization at ...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/2066F01N3/2892F01N2610/02F01N2610/1453Y02T10/12
Inventor 何龙张旭陈增响何伟娇付细平蒋海荣马相雪徐东
Owner WUXI WEIFU LIDA CATALYTIC CONVERTER
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