Numerical simulation of two phase flow characteristic in dynamic-static separator

Abstract

Dynamic-static coal separator is sensitive in changing the fineness of coal particle that it is available through adjusting the angular velocity of rotation of blades. The paper reveals the flow characteristics of gas-solid two phase in the dynamic-static coal separator respectively using CFD method that how the coal particles of different semi-diameters move under diverse angular velocity of rotation. When simulating the gas turbulent flow situation, κ-ε model is selected with semi-implicit method for pressure-linked equations; as to solid phase treatment, it is settled as discrete phase model using uncoupled method to track particle. The result shows the air stream flow pattern and typical particles' trajectories, as well as velocity pattern of particle and pressure change in the separator, which instructs the practical operation in a valid side. © Tsinghua University Press, Beijing and Springer-Verlag Berlin Heidelberg 2012.