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Spiral mixer for integrated injection of SCR catalyst

A technology of SCR catalyst and mixer, applied in machine/engine, exhaust gas treatment, mechanical equipment, etc., can solve the problems of difficult layout of integrated nozzles, insufficient space for urea atomization, change of urea injection performance, etc., to improve the mixing effect , the effect of reducing the risk of urea crystallization and increasing the temperature

Inactive Publication Date: 2016-03-16
WUXI WEIFU LIDA CATALYTIC CONVERTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional SCR (Selective Catalytic Reduction Converter) catalytic converter places the urea nozzle on the exhaust pipe through the connecting seat, which requires a large layout space, and for different chassis of the same engine, different layout spaces will lead to different locations for urea injection. changes, urea injection performance changes, resulting in the need for recalibration
At the same time, directly integrating the urea nozzle on the SCR catalytic converter is the need of many customers, but due to the difficulty in layout of the integrated nozzle and the lack of space for urea atomization, it is easy to cause urea droplets to be directly sprayed onto the EGP wall, resulting in serious urea crystallization problems

Method used

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  • Spiral mixer for integrated injection of SCR catalyst
  • Spiral mixer for integrated injection of SCR catalyst
  • Spiral mixer for integrated injection of SCR catalyst

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Embodiment Construction

[0014] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0015] Figure 1~4 Including air inlet flange 1, temperature sensor 2, air inlet pipe 3, mixer 4, air inlet 4-1, windshield 4-2, mixing pipe 5, cone pipe 6, heat preservation cylinder 7, front end cover 8, Urea nozzle base 9, first partition 10, first SCR carrier 11, first gasket 12, second SCR carrier 13, second gasket 14, cylinder 15, second partition 16, third partition 17 , Muffler pipe 18, rear end cover 19, nitrogen oxide sensor 20, air outlet pipe 21, etc.

[0016] Such as Figure 1~4 As shown, the present invention is a spiral mixer for SCR catalytic converter integrated injection, including a cylinder 15, the two ends of the cylinder 15 are respectively provided with a front end cover 8 and a rear end cover 19, and the inner cavity of the cylinder 15 is provided with a second An SCR carrier 11, a second SCR carrier 13, an air inl...

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Abstract

The invention belongs to the technical field of diesel engine tail gas aftertreatment, and relates to a spiral mixer for integrated injection of an SCR catalyst. The spiral mixer comprises a barrel. A front end cover and a rear end cover are arranged at the two ends of the barrel respectively. A first SCR carrier and a second SCR carrier are arranged in an inner cavity of the barrel. A gas inlet pipe is arranged at the position, between a first separation plate and the front end cover, of the barrel. A mixer device is arranged below the gas inlet pipe and comprises a taper pipe, a mixing pipe and a mixer body which are sequentially connected. The gas outlet end of the taper pipe is fixed to the first separation plate, and the gas inlet end of the mixer body is fixed to the front end cover. By means of the mixer, the aims of urea crushing, urea crystallization and even ammonia distribution can be effectively achieved.

Description

technical field [0001] The invention belongs to the technical field of post-treatment of diesel engine exhaust, and relates to a spiral mixer for integrated injection of an SCR catalytic converter. Background technique [0002] The traditional SCR (Selective Catalytic Reduction Converter) catalytic converter places the urea nozzle on the exhaust pipe through the connecting seat, which requires a large layout space, and for different chassis of the same engine, different layout spaces will lead to different locations for urea injection. changes, the urea injection performance also changes, resulting in the need for recalibration. At the same time, directly integrating the urea nozzle on the SCR catalytic converter is the need of many customers, but due to the difficulty in layout of the integrated nozzle and the lack of space for urea atomization, it is easy to cause urea droplets to be directly sprayed onto the EGP wall, resulting in serious urea crystallization problems . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/206F01N3/28F01N2610/02F01N2610/1453Y02T10/12
Inventor 陈增响胡正飞马相雪刘洋滕巍栋
Owner WUXI WEIFU LIDA CATALYTIC CONVERTER
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