Main influencing factors of TDH were studied and design principle of TDH was discussed for fluidized bed of white sugar.The formula of TDH for white sugar was recommended.

• 研究了白砂糖流化床空间分离高度（TDH）的主要影响因素，提出了白砂糖流化床TDH的设计原则。推荐了较适合白砂糖体系的TDH计算式。