Shaft-inlet and shaft-outlet barrel type aftertreatment assembly

A shaft-in, barrel-type technology, applied in exhaust treatment, mechanical equipment, engine components, etc., can solve the problems of high urea mixing uniformity, poor loading versatility, and large space occupation, so as to achieve a small risk of urea crystallization , Easy to reinstall and use, cost-saving effect

Active Publication Date: 2017-02-22
WUXI WEIFU LIDA CATALYTIC CONVERTER +1
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  • Summary
  • 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-inlet and shaft-outlet barrel type aftertreatment assembly
  • Shaft-inlet and shaft-outlet barrel type aftertreatment assembly
  • Shaft-inlet and shaft-outlet barrel type aftertreatment assembly

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with specific drawings and embodiments.

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

[0033] Such as 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 cover 1, and the DOC carrier 2.2 is arranged on the DOC cylinder. Within 2.1. The DOC cylinder 2.1 is mainly composed of an outer cylinder 12, an inner cylinder 14 and a therm...

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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 cylinder type post-treatment assembly that meets the National VI emission standards, and belongs to the technical field of diesel engine exhaust post-treatment. Background technique [0002] As the exhaust emission limits of diesel vehicles become more and more stringent, it is no longer possible to meet the new exhaust emission standards only by relying on the purification of the engine. By the stage of National V and National VI, the emission limit has more stringent requirements on the PM (particulate matter) and NOx (nitrogen oxides) content in exhaust pollutants. Therefore, it is necessary to rely on DOC (oxidation catalytic converter) and DPF ( Particle trap) and SCR (selective catalytic reduction converter) work together to purify diesel vehicle exhaust. The existing diesel vehicle barrel type purifier has a scattered structure, takes up a large space, and is not very versatile for loading. Especially f...

Claims

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Application Information

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Patent Type & Authority Applications(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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