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Box type mixer structure meeting national stage VI emission standard

A mixer and box-type technology, applied in machine/engine, muffler, exhaust treatment, etc., can solve the problems of large urea droplets and low NOx conversion efficiency, and achieve small pressure loss, simple structure, and improved uniformity. Effect

Inactive Publication Date: 2020-09-18
WUXI WEIFU LIDA CATALYTIC CONVERTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing mixer has large urea droplets, urea crystallization, and low conversion efficiency of NOx

Method used

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  • Box type mixer structure meeting national stage VI emission standard
  • Box type mixer structure meeting national stage VI emission standard
  • Box type mixer structure meeting national stage VI emission standard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1-5 Including special-shaped end cover 1, exhaust gas inlet 1-1, urea nozzle groove opening 1-2, urea spray base 2, heat insulation cotton 3, diffusion cover 4, exhaust gas first air intake slot 4-1, installation end cover 5. Mixer 6, double swirl blade 6-1, mixing chamber heat shield 7, heat insulation inner tube 7-1, first heat insulation jacket 7-2, second heat insulation jacket 7-3, third insulation Thermal jacket 7-4, mixing chamber 8, special-shaped end cap joint 9, etc.

[0024] Such as Figure 1-3 As shown, the present invention is a box-type National VI mixer structure, including a special-shaped end cover 1 with an exhaust gas inlet 1-1 at one end, a urea nozzle groove opening 1-2 on the other end, and a lower part connected to the heat shield of the mixing chamber 7. Mixer 6, end cap 5, diffuser cover 4 and urea...

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Abstract

The invention relates to a box type mixer structure meeting national stage VI emission standard. One end of a special-shaped end cover is provided with a tail gas inlet, a urea nozzle groove opening is formed in the upper portion of the other end of the special-shaped end cover, and the lower portion of the special-shaped end cover communicates with a mixing cavity heat shield. A mixer, a mountingend cover, a diffusion cover and a urea spraying base are sequentially mounted on the upper portion of the mixing cavity heat shield. A mixing cavity is formed in the mixing cavity heat shield. The device is simple in structure and low in manufacturing cos, the uniformity of urea droplets is considered, the mixing uniformity of the mixer, the conversion efficiency of NOx, the durability and the processing manufacturability are improved, the pressure loss of airflow passing is reduced, and the mixing efficiency is high. The urea droplets are not easy to crystallize, the conversion efficiency of NOx is high, and the pressure loss is small.

Description

technical field [0001] The invention belongs to the technical field of engine exhaust post-treatment, and relates to a box-type National VI mixer structure. Background technique [0002] With the emergence of China VI standards for automobiles, the design of China VI after-processing products is also getting higher and higher. General Sinotruk China VI post-processing includes DOC, DPF, mixer module, SCR and ASC structure. Among them, Chinese Liu has stricter requirements for mixers. [0003] In the existing mixer, the urea droplet is large, the urea crystallizes, and the conversion efficiency of NOx is low. Contents of the invention [0004] The purpose of the present invention is to provide a box-type National VI mixer structure, which can solve the above problems, and take into account the uniformity of urea droplets, the conversion efficiency of NOx, the pressure loss of air flow, durability, and processing technology. . [0005] According to the technical solution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N3/20F01N13/14
CPCF01N3/2066F01N3/28F01N3/2892F01N13/14F01N2570/14F01N2610/02F01N2610/1453
Inventor 张杰徐超宗培腾马越段一军
Owner WUXI WEIFU LIDA CATALYTIC CONVERTER
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