A THEORETICAL MODEL FOR PARTICLE SEGREGATION IN A FLUIDIZED BED DUE TO SIZE DIFFERENCE

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Abstract
An a priori model has been developed for the prediction of particle segregation in a fluidized bed of particles of same density. The model predicts the phase equilibrium of any two-component system by taking into account the Uml of both components and the minimum concentration of fines for minimum bed viscosity. An extension of the model to a multi-component system leads to an algorithm which allows the prediction of the quantity and the concentration profiles of particles in both phases of a segregated fluidized bed. The algorithm requires only the initial concentration profile or the mixture and the physical properties of each component and the fluidizing gas. A good agreement between the predicted and the previously measured concentration profiles of both a two-size and a wide size mixture shows the adequacy of the model.

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