Numerical simulation and visualization experiment of solid particle motion affected by parameters of flow in tapered drum rotating type separator

Abstract

As the fundamental research work of solid particle motion in the two-phase flow of solid-liquid or gas-liquid in the rotating state, based on the tapered drum rotating type separator and medium of water, the dynamic model of particle motion in the rotating flow filled was set up. Simultaneously, the visualization experiment of particle motion was carried out by the high speed camera and compared with the calculation results. In setting up of dynamic model, besides of forces of gravity, buoyancy, drag force and centrifugal force, the forces of imagination mass force, Basset force, Saffman lift force and pressure gradient force were considered. In the calculation, angle of taper, velocity of down flow and particle size were considered. It is found that the length of drum, angle of taper, down flow speed, rotating speed of drum and particle size had influence on the separating time and the length of particle movement traces. The results were proved by the visualization experiment, and further correctness of dynamic model was validated.

Numerical Simulation and Experimental Research on Coal Ash Collecting and Grading System

“…Based on the jet-attracting flow technology [8][9][10][11] and gas-solid two-phase flow theory [12][13][14], a new coal ash collecting and grading device was developed in this study. The new device could achieve the grading separation of coal ash while collecting and transporting.…”