Shaft in, shaft out, cylinder type aftertreatment assembly

A shaft-in, barrel-type technology is applied in the field of shaft-in-shaft-out barrel-type post-processing assemblies, which can solve the problems of high urea mixing uniformity, poor loading versatility, and large space occupation, and achieve low urea crystallization risk. , Easy to reinstall and use, cost-saving effect

Active Publication Date: 2019-05-24
WUXI WEIFU LIDA CATALYTIC CONVERTER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing diesel car barrel-type purifiers have scattered structures, take up a lot of space, and are not very versatile for loading
Especially for the shaft-in shaft-out cylinder type purifier, it is impossible to integrate DOC, DPF, SCR and urea injection mixing unit in the same cylinder, and it is impossible to ensure high urea mixing uniformity

Method used

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  • Shaft in, shaft out, cylinder type aftertreatment assembly
  • Shaft in, shaft out, cylinder type aftertreatment assembly
  • Shaft in, shaft out, cylinder type aftertreatment assembly

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Embodiment Construction

[0031] The present invention will be further described below with reference to the specific drawings and embodiments.

[0032] As shown in the figure: the shaft-in-shaft-out barrel type aftertreatment assembly in the embodiment is mainly composed of an oxidation catalytic converter 2, a particle trap 3, a urea injection mixing unit 4 and a selective catalytic reduction converter 5 which are connected in sequence. The front end of the oxidation catalytic converter 2 is connected to the intake end cover 1 , and the rear end of the selective catalytic reduction converter 5 is connected to the exhaust end cover 6 .

[0033] like Figure 1~Figure 6 As shown, in this embodiment, the oxidation catalytic converter 2 is mainly composed of a DOC cylinder 2.1 and a DOC carrier 2.2, the front end of the DOC cylinder 2.1 is connected to the intake end cap 1, and the DOC carrier 2.2 is arranged in the DOC cylinder body 2.1. The DOC cylinder 2.1 is mainly composed of an outer cylinder 12, ...

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Abstract

The invention relates to a shaft-inlet and shaft-outlet barrel type aftertreatment assembly. The shaft-inlet and shaft-outlet barrel type aftertreatment assembly is characterized by comprising an oxidation catalysis converter, a particulate trap, a urea spraying and mixing unit and a selective catalytic reduction converter which are successively connected, wherein the front end of the oxidation catalysis converter is connected with a gas inlet end cap; and the tail end of the selective catalytic reduction converter is connected with a gas outlet end cap. The shaft-inlet and shaft-outlet barrel type aftertreatment assembly is compact in structure, DOC, DPF, SCR and the urea spraying and mixing unit can be integrated together effectively, stable and efficient operation of the DOC, the DPF and the SCR is ensured, urea is uniformly distributed on an end surface of the SCR, and urea crystallization is avoided.

Description

technical field [0001] The invention relates to a shaft-in-shaft-out-tub-type post-treatment assembly meeting the National VI emission standard, and belongs to the technical field of diesel engine exhaust post-treatment. Background technique [0002] With the stricter and stricter emission limits of diesel exhaust pollutants, it is no longer possible to meet the new exhaust emission standards only by means of in-engine purification. In the national five and six stages, the emission limit has more stringent requirements for PM (particulate matter) and NOx (nitrogen oxide) content in exhaust pollutants, so it is necessary to use DOC (oxidation catalytic converter), DPF ( Particulate filter) and SCR (Selective Catalytic Reduction Converter) work together to purify diesel vehicle exhaust. The existing diesel barrel type purifier has a scattered structure, occupies a large space, and is not versatile for loading. Especially for the shaft-in and shaft-out cylinder type purifier,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N13/00F01N3/035F01N3/28F01N13/14F01N13/18
CPCF01N3/035F01N3/2882F01N13/0097F01N13/141F01N13/1838F01N13/1844F01N2250/02F01N2570/10F01N2570/12F01N2570/14F01N2610/02Y02T10/12
Inventor 蔡龙陈增响何伟娇马相雪张俊超宫婷婷
Owner WUXI WEIFU LIDA CATALYTIC CONVERTER
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