A novel type double grid dispersing structure is designed and set on the top of the drying chamber which increase the mingling degree of the liquid with the gas and reducing the invalid area of the drying chamber . the combined spin - flow pressure spray drying equipment has more superiority to the thermal sensitive material ( 5 )本文创造性地设计了新型的双格栅均风装置并设置在压力喷雾干燥塔的上部，强化了干燥塔内气、液两相间的混合，最大限度地消除了干燥塔内的无效区域，对热敏性物料的干燥更显出该结构型式的优越性。
The device is to concentrate the material in the occasions such as china traditional drug 、 west drug 、 dextrose 、 amylum sugar 、 oral liquid 、 chemisty 、 foodstuff 、 monosodium glutamate and milk product and to reclaim the industrial organic solvent such as alcohol . it is suitable to concentrate the thermal sensitive material under lower temperature and vacuum with little batch number and multiple varieties 本设备适用于中药、西药、葡萄糖、淀粉糖、口服液、化工、食品、味精、乳品等物料浓缩与工业有机溶剂(如酒精)的回收，适用于批量小、品种多的热敏性物料的低温真空浓缩。
The influence of difference in temperature , reynolds number of film and prandtl number to the heat transfer performance on the evaporation side was discussed via the uniform wall temperature experiments . by analyzing above influence factors , the character of umbrella - plate evaporator which is fit for evaporation under little difference in temperature and fit for evaporating heat sensitivity materiel could be obtained 通过恒壁温实验探讨了传热温差、液膜雷诺数、普朗特数这些主要因素对伞板式降膜蒸发器传热性能的影响，通过对以上影响因素的分析，得出了此种结构的蒸发器特别适用于小温差情况下的蒸发，而且特别适用于热敏性物料的蒸发等特性。
