摘要
结合过热蒸汽干燥和流化床干燥的各自特性,开发出一种新型的过热蒸汽流化床干燥装置,阐述了工作原理。以卧式多室过热蒸汽流化床干燥装置干燥酒糟为例进行了工艺设计和计算,在保证稳定工作的条件下,干燥室内的绝对压力为0.3MPa,干燥室进出口的工作介质温度分别为180℃和140℃,最佳操作流化速度为2.6m/s。试验结果表明:该卧式多室过热蒸汽流化床干燥装置具有干燥速率大、热效率高、被干产品质量好和干燥操作成本低等优点,特别适宜于初始湿分高而加工附加值低的农产物料的干燥。
A new type of superheated steam fluidized bed dryer was developed at the basis of superheated steam drying and fluidized bed drying. Its work principle was elaborated. The study effort was emphasized on designing and computing of a lees dryer. In steady superheated steam drying, the conditions were set up as follows： superheated steam temperature of 180℃ at a fixed superficial velocity of 2.6 m/s, the absolute pressure of drying room is 0.3MPa. The results indicate that the dryer have many strongpoints as quick drying velocity, lower cost, and good quality. It is very suit for many agricultural products that has high original humid and has low processing add-ons value.
关键词
流化床干燥
过热蒸汽
农产物料
Fluidized bed drying
Superheated steam
Agricultural products
