水平旋转筒反应器内的换热

Heat transfer in a horizontal rotary drum reactor

本文研究了直径１５～１００μｍ的碳水化合的颗粒在水平旋转筒反应器中的传热．用“渗透模型”机理讨论了粉体颗粒与旋转筒内壁面间的换热，推导出换热系数α与筒旋转速度、物料填充度之间的理论分析解。换热系数理论值和实验所得数据较为吻合。

The heating of carbohydrates (particle size 15-100 μm) in a horizontal rotary drum reactor has been studied. It became clear that the heat transfer between granular solids and wall may be described by the penetration model. The theoretical heat transfer coefficients vary with the rotating speed and the degree of filling.They are quite well with the experiments of the former researchers. The heat transfer coefficients be- tween wall and gas have also be studied and the magnitude of it between wall and gas phase indicates a natural convection mechanism.