Cylindrical integrated removable urea nozzle post-processor assembly

Abstract

A cylindrical integrated detachable urea nozzle post-processor assembly A urea nozzle is disposed directly and integrally on the post-processor and is used in conjunction with the urea mixer, At the same time, the connection between the urea nozzle seat and the post-processor is changed from the traditional welding method of the nozzle seat and the pipeline to the flange gasket connection method,the detachable observable structure of the urea nozzle is ensured while the sealing is ensured, At any time, it is detachable to check whet urea crystals are generate inside that post-processor and the mixer, Urea crystals generated in the interior can be detached and cleaned at any time, the invention is an integrated type, modular, With mixer, detachable cleaning and checking, simple and low cost cylindrical integrated detachable urea nozzle post-processor structure, which can solve the problems of difficult layout of urea nozzle in pipeline, difficult to ensure urea mixing uniformity, insufficient anti-urea crystallization ability, etc., the post-processing system has strong layout advantages and market competitiveness.

Description

technical field [0001] The patent of the invention belongs to the field of selective catalytic reduction environmental protection components for commercial vehicles, and relates to a cylindrical post-processor assembly with integrated detachable urea nozzles, which is suitable for diesel commercial vehicles that meet the regulations of China IV, China V and China VI. Aiming at the difficulty in the arrangement of urea nozzles in the whole vehicle, the SCR post-treatment system is easy to form urea crystals in the pipeline. Background technique [0002] The limit value of exhaust pollutants (mainly particles and nitrogen oxides NOx) in the national IV, national V and national VI emission regulations of diesel engines is much lower than that of national III emission regulations. It is difficult to reduce the above two exhaust pollutants in the engine at the same time. The SCR (Selective Catalytic Reduction) system can effectively reduce the content of nitrogen oxides in the ex...

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Problems solved by technology

[0009] In order to solve the problems in the existing post-processor system, such as difficult layout of pipeline urea nozzles, difficult guarantee of urea mixing uniformity, insufficient ability to resist urea crystallization, crystallization cannot be observed and cleaned, etc., the present invention provides a cylindrical integrated can Disassemble the post-processor assembly of the urea nozzle, integrate and arrange the urea nozzle directly on the post-processor and use it in conjunction with the urea mixer to significantly improve the interaction between the urea aqueous solution and the high-temperature exhaust gas, and improve the urea hydrolysis rate and mixing uniformity

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