Drying granular solids in fluidized bed—I: Description on basis of mass and heat transfer coefficients

In this paper on drying of wet solids in a fluidised bed a model is presented which describes the mass transfer from the solids to a rising bubble for the case that there is no diffusion limitation inside the solids. Two contributions are accounted for: the mass transfer from the dense phase across the cloud boundary and the mass transfer from the solids which are passing the cloud during the rise of the bubble. A similar model is presented for the heat exchange between the bed and the rising bubbles.