Fixation device of catalyst modules in marine diesel engine SCR reaction unit

Abstract

Belonging to the environmental protection technical field of marine diesel engines, the invention provides a fixation device of catalyst modules in a marine diesel engine SCR reaction unit. The fixation device of catalyst modules in a marine diesel engine SCR reaction unit has a hollow frame composed of multiple hollow square steels; an installation frame is vertically placed in the reaction unit,and is perpendicular to an axis between an inlet and an outlet of the reaction unit; the installation frame is a structure with openings on the front and rear end faces; the installation frame is internally welded with a plurality of partition plates arranged up and down; the multiple partition plates divide the installation frame into a plurality of cavities for placing catalyst; a plurality ofcatalyst modules are placed in each cavity; the rear end face of the installation frame is welded with limit baffle plates; the rear end faces of the plurality of catalyst modules are all in contact with the limit baffle plates, and are located on a same cross section; and the front end face of the installation frame is equipped with plug baffle plates. The fixation device provided by the invention effectively solves the problem of easy crushing caused by ship swaying and catalyst module stacking, and greatly improves the physical lifetime of the catalyst modules.

Description

technical field [0001] The invention belongs to the technical field of environmental protection of marine diesel engines, and in particular relates to a fixing device for a catalyst module in an SCR reaction device of a marine engine. Background technique [0002] There are only two types of diesel engine NOx emission reduction: internal purification and external aftertreatment. Because the former changes the diesel engine greatly and affects the performance of the diesel engine, the current mainstream solution for marine diesel engines to reduce NOx emissions is to use the selective catalytic reduction system, that is, SCR. The system uses urea solution to quickly reduce NOx into harmless N2 and H2O under the action of a catalyst. [0003] The reaction place of the reducing agent and the oxidizing agent in the SCR system is the reaction device, and the catalyst module required for the reaction is fixed in the reaction device. The structure of the catalyst module is a cuboi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a catalyst module fixing device in the SCR system reaction device, so that it can effectively solve the problem that the ship is periodically shaken and the catalyst modules are easily broken due to a large number of stacked catalyst modules under the premise of being detachable

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