Experimental study on the fugitive characteristics of particles flow impacting inclined wall

Abstract

The process of loading and unloading of bulk materials is common in industrial production, which is likely to cause dust pollution problems in the plant. In order to understand the dust generation mechanism of the material unloading process, this paper examines it through three processes. Firstly, we established an experimental model for the process of particle flow impacting on the wall. Secondly, the particle motion fugitive characteristics of the particles flow impacting the wall were tested using a high-speed camera. Finally, by processing the experimental data, the angle deviation ratio is pioneered to analyze the effect of wall angle on particle fugitive and the particle fugitive characteristics under different conditions. The results show that as the wall inclination angle increases, the angular deviation ratio is smaller, the total restitution coefficient of particles is larger, the fugitive contour tension angle is larger, and the outer particles fall further away; As the drop height increases, the farthest vertical distance of the fugitive contour from the impact surface is longer; As the outlet diameter increases, the particle impact velocity also increases. The research results can provide a theoretical basis for dust fugitive control during bulk material loading and unloading in industrial plants.