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Hybrid components

A technology of mixing components and mixing elements, which is applied in engine components, exhaust treatment, machines/engines, etc., can solve problems such as easy deposition, ammonia leakage pollution, low conversion efficiency of nitrogen oxides, etc., and achieve the effect of improving the effect

Active Publication Date: 2020-07-17
TENNECO SUZHOU EMISSION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If ammonia (NH 3 ) uneven distribution will lead to low conversion efficiency of nitrogen oxides (NOx), if the injection volume of urea is increased in order to meet the emission performance, it will easily cause ammonia leakage pollution
At the same time, urea droplets are easy to deposit when they come into contact with the wall surface with low temperature, and when the crystallization is serious, it will block the exhaust pipe and cause the power performance of the engine to decline

Method used

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Embodiment Construction

[0026] Please refer to Figure 1 to Figure 10 As shown, the present invention discloses a mixing assembly 100 for use in an engine exhaust aftertreatment device to treat engine exhaust. The exhaust aftertreatment device may include a first aftertreatment component (not shown) located upstream of the mixing assembly 100 and / or a second aftertreatment component (not shown) located downstream of the mixing assembly 100 . Wherein, the first post-processing component may be an oxidation catalyst (DOC) or a combination of a DOC and a diesel particulate filter (DPF), and the second post-processing component may be a selective catalytic reduction device (SCR). In addition, those skilled in the art can understand that the above-mentioned DOC, DPF, SCR, etc. can be designed as other types of catalytic converters or combinations according to actual needs, which will not be repeated here.

[0027] The mixing assembly 100 includes a housing 3, a first partition 1 located in the housing 3,...

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Abstract

Disclosed is a mixing assembly. The mixing assembly is used in an engine exhausted air aftertreatment device. The mixing assembly comprises a shell, a first partition plate located in the shell and amixing element erected on the first partition plate. The shell comprises a first cavity and a second cavity, wherein the first cavity and the second cavity are located in the two sides of the first partition plate correspondingly. A first penetrating hole for communicating the first cavity with the second cavity is formed in the first partition plate. The mixing element is provided with an internal cavity communicating with the first cavity and a protruding part protruding towards the interior of the internal cavity so as to be capable of forming the airflow mixing effect of double rotationalflow on the two sides of the protruding part. In addition, the sectional area of the internal cavity is changed in a graded mode in the extending direction of the mixing element to be capable of guiding mixed airflow, so that the mixing effect is improved.

Description

technical field [0001] The invention relates to a mixing assembly, which belongs to the technical field of aftertreatment of engine exhaust. Background technique [0002] Studies have shown that the uniformity of ammonia distribution in the pipeline of exhaust aftertreatment systems (such as selective catalytic reduction systems, SCR systems) has an important impact on the overall performance and durability of the system. If ammonia (NH 3 ) uneven distribution will lead to low conversion efficiency of nitrogen oxides (NOx), if the injection volume of urea is increased in order to meet the emission performance, it will easily cause ammonia leakage pollution. At the same time, urea droplets are easy to deposit when they come into contact with the wall surface with low temperature. When the crystallization is serious, the exhaust pipe will be blocked and the power performance of the engine will be reduced. Improving the mixing uniformity of ammonia molecules can effectively i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/2066F01N3/2892F01N2240/20F01N2610/02F01N2610/1453
Inventor 王聪
Owner TENNECO SUZHOU EMISSION SYST