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Mixing cavity assembly and tail gas aftertreatment packaging

A technology of mixing cavity and components, applied in exhaust treatment, exhaust device, muffler device, etc., can solve the problems of low temperature of local pipe wall or mixed structure, blockage of exhaust pipe, decrease of engine power performance, etc., to improve anti-crystallization effect of ability

Pending Publication Date: 2021-02-26
TENNECO SUZHOU EMISSION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Uneven distribution of ammonia over a long period of time can lead to uneven catalyst aging, which affects the overall performance of the catalyst
In addition, the uneven distribution of urea droplets will cause the temperature of the local pipe wall or the mixing structure to be too low, forming crystallization, which will block the exhaust pipe in serious cases, resulting in a decrease in engine power performance

Method used

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  • Mixing cavity assembly and tail gas aftertreatment packaging
  • Mixing cavity assembly and tail gas aftertreatment packaging
  • Mixing cavity assembly and tail gas aftertreatment packaging

Examples

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Embodiment Construction

[0020] Please refer to figure 1 As shown, the present invention discloses an exhaust gas after-treatment package, which includes a first after-treatment carrier assembly 1, a second after-treatment carrier assembly 2, and a third after-treatment carrier located upstream of the first after-treatment carrier assembly 1 component 3 and a mixing chamber component 4 connecting the first post-processing carrier component 1 and the second post-processing carrier component 2 . In one embodiment of the present invention, the first after-treatment carrier assembly 1 is a diesel particulate filter (DPF), the second after-treatment carrier assembly 2 is a selective catalytic reducer (SCR), and the The third aftertreatment carrier component 3 is a diesel oxidation catalyst (DOC).

[0021] Please refer to Figure 2 to Figure 6 As shown, in the illustrated embodiment of the present invention, the mixing chamber assembly 4 includes a mixing chamber housing 5 and a mixing tube assembly 6 ins...

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Abstract

The invention relates to a mixing cavity assembly. The mixing cavity assembly includes a mixing cavity shell and a mixing pipe assembly; the mixing cavity shell is provided with a first cavity and a second cavity; the mixing pipe assembly comprises a rotational flow pipe, a baffle connected with the rotational flow pipe and a cone used for containing the baffle; the baffle is provided with a plurality of airflow through holes; the cone is provided with a first port and a second port; the first port is used for installing the baffle; the second port is communicated with the second cavity; and the area of the first port is larger than that of the second port. The invention further discloses a tail gas aftertreatment assembly comprising the mixing cavity assembly. Compared with the prior art,by arranging the cone, the volume of the mixing cavity used for mixing tail gas and urea liquid drops is increased; the tail gas with high temperature is introduced into the mixing cavity through theairflow through holes in the baffle; and the crystallization resistance is improved.

Description

technical field [0001] The invention relates to a mixing chamber assembly and an exhaust gas aftertreatment package, belonging to the technical field of engine exhaust aftertreatment. Background technique [0002] Studies have shown that the uniformity of ammonia distribution in the exhaust gas after-treatment system (such as selective catalytic reduction system, SCR system) pipeline has an important impact on the overall performance and durability of the system. The uneven distribution of ammonia over a long period of time can lead to uneven catalyst aging, which affects the overall performance of the catalyst. In addition, the uneven distribution of urea droplets will cause the temperature of the local pipe wall or mixing structure to be too low, forming crystallization, which will block the exhaust pipe in severe cases and lead to a decrease in engine power performance. Contents of the invention [0003] The purpose of the present invention is to provide a mixing chamb...

Claims

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Application Information

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IPC IPC(8): F01N3/28F01N3/20F01N13/00
CPCF01N3/2066F01N3/2892F01N2240/20F01N2610/02F01N2610/1453F01N2610/1486F01N13/009
Inventor 严才宝凌睿叶威王长林郑鑫
Owner TENNECO SUZHOU EMISSION SYST
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