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Received April 30, 2002
Accepted September 26, 2002
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Drying Characteristics of Millet in a Continuous Multistage Fluidized Bed
Industry Furnace Research Team, KIER, Daejeon 305-343, Korea 1Department of Environmental Eng., Daejeon Univ., Daejeon 300-716, Korea 2Department of Chemical & Biomolecular Eng., KAIST, Daejeon 305-701, Korea 3Department of Chem. Eng., SKKU, Korea
Korean Journal of Chemical Engineering, November 2002, 19(6), 1106-1111(6), 10.1007/BF02707240
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Abstract
The effects of gas velocity, inlet gas temperature and the solid feed rate on the drying efficiency, the outlet solid moisture content, bed temperature in each stage, the outlet gas humidity and temperature in a rectangular acryl multistage fluidized bed (0.172 m×0.192 m×1.5 m-high) with a downcomer (0.04 m-I.D.) were investigated. The experiments were performed by using 1.9 mm millet particles. The final moisture contents of the solids increased with increasing the solid feed rate. The drying efficiency increased with increasing the wetted solid feed rate but decreased_x000D_
with increasing the inlet gas temperature. The drying performance of the multistage fluidized bed was compared with the single-stage fluidized bed and found to be superior under identical operation conditions. The model predicted values were well matched with the experimental data in the multistage fluidized bed dryer.
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