Comparison of Hot Air Systems in Three Types of Fluidized Bed Cut Stem Dryer

The hot air systems in three types of fluidized bed cut stem dryer widely used in Chinese cigarette factories and their effects on the quality of dried cut stem were analyzed and compared. The results showed that uneven air velocity distribution on the surface of or inside the fluidized bed would happen and deteriorate the uniformity of moisture content of dried cut stem in case that the intake and circulation air regulators had not been rightly set. Properly setting the hot air system is essential to reducing the discrepancy of moisture content and ensuring good processing quality and stability of dried cut stem.