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Modelling and Simulation of a Direct Contact Rotary Dryer |
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| Authors: | C Shene F Cuhillos R Perez PI Alvarez |
| Affiliation: | 1. Univenidad de La Fmntera, Chemical Engineering Department, Casilla 54-D , Temuco, Chile;2. Univenidad de Santiago de Chile, Chemical Engineering Department, Casilla , Santiago, 10233, Chile;3. Pontificia Univenidad Católica de Chile, Chemical and Bioprocessing Engineering Department, Casilla 306 Correo 22 , Santiago, Chile |
| Abstract: | ABSTRACT A mathematical model able to predict solid and drying gas temperature and moisture content axial profiles along a direct contact rotary dryer was developed. The study was focused on the drying kinetics based on phenomenological models. Two different drying mechanisms in the decreasing drying rate period were tested: proponional to the unbound moisture content and moisture diffusion inside the particle. Experimental data collected in a pilot-scale direct contact rotary dryer was used to validate the model. Soya and fish meals were used as drying material. |
| Keywords: | heat and mass transfer meal drying drying kinetics volumetric heat transfer coefficient residence time |