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U-shaped mixer device used for square box structure

A mixer and square box technology, applied in the direction of mufflers, exhaust devices, machines/engines, etc., can solve the problems of uneven mixing of ammonia gas, easy crystallization of urea, etc., and achieve favorable pyrolysis, excellent mixing effect, Accelerated pyrolysis/hydrolysis effect

Active Publication Date: 2018-06-22
WUXI WEIFU LIDA CATALYTIC CONVERTER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing structure, there are common problems such as easy crystallization of urea and uneven mixing of ammonia gas.

Method used

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  • U-shaped mixer device used for square box structure
  • U-shaped mixer device used for square box structure
  • U-shaped mixer device used for square box structure

Examples

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0026] Such as Figure 1-5 Shown, a kind of U-shaped mixer device for square box structure is characterized in that, comprises:

[0027] DPF particle supplementary unit 1, mixer inlet end cover 2, mixer outlet end cover 3, square box platform partition 4, urea injection base 5 and mixer device 6;

[0028] The mixer inlet end cover 2 and the mixer outlet end cover 3 are arranged side by side on the side of the square box platform partition 4, and the square box platform partition 4 is also provided with a urea injection base 5, and the urea injection The base 5 is adjacent to the inlet end cover 2 of the mixer, and the other side of the partition plate 4 of the square box platform is provided with a DPF particle supplementary unit 1 and a mixer device 6 at intervals;

[0029] The mixer device 6 has a U-shaped structure, including a mixer upper cover 6-1, a mix...

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Abstract

The invention relates to the field of diesel engine exhaust gas after-treatment, and provides a U-shaped mixer device used for a square box structure. The device comprises a DPF particle complementingunit, a mixer air inlet end cover, a mixer air outlet end cover, a square box platform partition board, a urea injection base and a mixer device body; the urea injection base is arranged on the square box platform partition board, the DPF particle complementing unit and the mixer device body are arranged on the other side of the square box platform partition board at an interval, one end of a mixer supporting plate and the lower portion of a mixer partition board are arranged in a crossed manner, the other end of the mixer supporting plate is fixed to the inner wall of a mixer cylinder. Exhaust fluid flows through rotational flow blades of a mixer rotational flow pipe, higher rotation air flow is formed, pyrolysis / hydrolysis of urea water solutions can be accelerated, the mixing effect isgood, the fluid flows to an SCR through a U-shaped structure, and compared with the existing technology, the mixing distance is lengthened, pyrolysis of the urea water solution can be benefited, thebackpressure effect of the whole mixing device is reduced, the structure is compact, and mounting is convenient.

Description

technical field [0001] The invention belongs to the field of post-treatment of diesel engine exhaust, in particular to a U-shaped mixer device used in a square box structure. Background technique [0002] With the development of the national emission standards for diesel vehicle exhaust pollutants to the Euro VI stage, more stringent emission standards have stricter definitions for exhaust pollutants. SCR (Selective Catalytic Reduction Converter) technology has become the first choice of major domestic OEMs. The SCR technology sprays urea solution into the exhaust gas, and the urea solution is then pyrolyzed into ammonia gas at high temperature. The ammonia gas reacts with the NOx in the exhaust gas under the catalysis of platinum, palladium and other precious metals in the SCR carrier coating, making it greatly Reduce, so as to achieve the exhaust gas treatment to meet the Euro VI emission standards. [0003] Therefore, how to reduce the low-temperature crystallization of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N3/20
CPCF01N3/2073F01N3/2892F01N2610/02Y02T10/12
Inventor 郭鑫陈增响何龙张旭付细平
Owner WUXI WEIFU LIDA CATALYTIC CONVERTER
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