A kinetic model for drying of solids in batch fluidized beds

Abstract

A model for drying solids in a batch fluidized bed is proposed assuming that the bed may be divided into a solids phase, an interstitial gas phase, and a bubble phase with mass and heat transfer between the phases. The model comprehensively considers the bubble size, the bubble rise velocity, and the bubble volume fraction and covers constant drying rate and falling drying rate periods. T h e predictions using the model are compared with the experimental data obtained in the present study covering a wide range in experimental conditions and the data reported in literature. Abstract published in Advance ACS Abstracts, December 15, 1993.

Investigation of Hexane Diffusion in HDPE Particulates for Drying Applications

“…The larger the Biot number, the smaller the external mass-transfer effect. Generally, when the Biot number is greater than 10 3 , the mass-transfer effect can be neglected (Srinivasa Kannan et al, 1994). Table 3 lists the Biot numbers calculated for the n-hexane/HDPE system at two particle sizes.…”

Modeling Drying Kinetics of Mustard in Fluidized Bed

“…The extent of drying zones are decided based on the type of material, with materials like sand, ion exchange resin, glass beads etc. reported to have larger duration of constant rate period and short linear falling rate period while the fibrous material or food grains are reported to have a very short duration constant rate period and a longer curvy-linear falling rate period [2,3].…”