Investigation on the incipient fluidization and heat transfer in a centrifugal fluidized bed dryer

Based on the continuum theory, a physical model of gas-solid two phase flow in a centrifugal fluidized bed has been proposed. A set of governing equat ions to describe the fluidization state are obtained and solved numerically after some simplifying. The quantitative experimental study on the charact eristics of the incipient fluidization in the centrifugal fluidized bed is performed to examine the proposed model. Gas-solid two phase heat transfer in CFB during a drying process is also conducted. The influences of bed thi ckness, particle diameter, physical properties of particle, rotating speed of the bed and the gas superficial velocity on heat transfer characteristic s are examined. A correlation that can be used to calculate the heat transf er coefficients in the drying process in CFB is obtained.