A treatment method for anti-dust accumulation of U-shaped pipe elbow

Abstract

The invention discloses a dust retention prevention treatment method of a U-shaped pipe elbow. The method comprises the following specific steps: a steady-state turbulent mixture speed field of the U-shaped pipe elbow is determined; the slip velocity of dust particles is solved; the dust particle concentration range of a board of the U-shaped pipe elbow is calculated; a high and medium dust particle concentration area envelope curve and a medium and low dust particle concentration area envelope curve of the board are obtained; a fitting curve equation corresponding to the medium and low dust particle concentration area envelope curve and a fitting curve equation corresponding to the high and medium dust particle concentration area envelope curve are obtained, that is, a high dust particle concentration area, a medium dust particle concentration area and a low dust particle concentration area of the board are obtained; a stainless steel clean pipe is adopted in the high dust particle concentration area of the board; and a galvanized steel sheet is adopted in the medium dust particle concentration area. The method can effectively reduce deposition of suspended particles in the elbow, saves the use level of wear resistant materials, reduces the production cost of the elbow, and solves the problem of large possibility of dust retention of an air duct elbow in the prior art.

Description

technical field [0001] The invention belongs to the field of industrial ventilation, and in particular relates to an anti-dust treatment method for U-shaped pipe elbows. Background technique [0002] When the outdoor air in the air supply system is processed by the air conditioning unit, since most coarse and fine filters can only filter suspended particles above 3um, the fine particles will directly enter the air duct with the wind, and the actual roughness of the inner surface of the air duct is much higher. Due to the size of the fine particles, these fine particles accumulate more and more with the collision and friction between the air and the inner wall of the air duct to generate electrostatic adsorption, which leads to the increasing roughness of the inner wall of the air duct and the speed of dust adhesion. , so that thicker dust accumulation is formed over the years. However, all suspended particles in the exhaust system enter the pipeline with the airflow, and th...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a dust-proof treatment method for U-shaped pipe elbows. Clean materials with different roughness heights are used in the parts with different dust concentrations, which can effectively reduce the deposition of suspended particles at the elbows, and save time. Reduce the amount of abrasive material used, reduce the cost of the elbow, and solve the problem that the air duct elbow in the prior art is easy to accumulate dust

Images