Studies on the Through-Flow Rotary Dryer
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概要
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1. Through-flow rotary dryer was seemed to be applicable to pre-drying of black tea. Data for designing a plant were obtained with a small scale dryer.<BR>2. The effects of rotation (R) and feed rate (F/S) on the holdup were expressed by the following equations.<BR>black tea H/V=2.7 (F/S)<SUP>0.6</SUP> R<SUP>-0.5</SUP><BR>green tea H/V=11(F/S)<SUP>0.5</SUP>R<SUP>-0.5</SUP><BR>3. The volumetric heat-transfer coefficient (Ua) of through-flow rotary dryer was as much about 10-folds as that of rotary dryer.<BR>4. The effects of feed rate and air rate on the volumetric heat-transfer coefficient (Ua) were expressed by the following equations.<BR>oversize tea Ua=0.61 (F/S)<SUP>0.5</SUP>(G/S)<SUP>0.7</SUP><BR>under size tea Ua=0.67 (F/S)<SUP>0.5</SUP>(G/S)<SUP>0.7</SUP>
- 日本茶業技術協会の論文
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