Some drying aspects of multistage fluidized beds

Multistage fluidized beds with and without downcomers to the horizontal per forated plates are used to dry food materials under different experimental conditions. The influence of various operating parameters such as inlet tem perature of the heating medium, flow rate of the heating medium, material n ow rate, and number of stages have been investigated. The performance of mu ltistage fluidized beds with and without downcomers is compared and the dif ference in performance is explained based on stagnancy and short-circuiting of materials in each stage.