根据实验室已有的旋流式干燥塔建立模型并按照相同尺寸建立直流干燥塔模型，对比了2种进风方式的干燥效果。模拟结果表明，旋流式干燥塔的干燥效果要好于直流式干燥塔，但也会有黏壁、过热等现象。因此在实验过程中对于高分子物料干燥时应该有关于干燥气体温度及在颗粒干燥塔内的停留时间的特殊操作要求。

There are two different drying air patterns with different spray drying towers:direct flow and swirling flow.Different drying air flow patterns have significantly impact on the result of spray drying.Two models with different air flow patterns are built with same size to investigate the effect of air flow pattern on drying effect.The simulation results show that the drying performance of the swirling drying tower is better than that of the direct flow drying tower.But there also exists problems for the swirling drying tower,like sticking walls and overheating.Therefore,in the process of experiment for drying polymer materials,there shall be special operation requirements for drying gas temperature and residence time in the particle drying tower.

李翔宇(1994-),男,硕士生