水平转盘与转鼓微波干燥均匀性的实验研究

Experimental Study on Microwave Drying Uniformity in Rotating Turntable and Rotary Drum

针对微波干燥存在的主要问题——干燥的不均匀性,提出利用改变物料在微波场中的位置来改善物料对微波能吸收的均匀性,从而达到微波干燥的均匀性.以黄豆为物料,比较了水平转盘与转鼓两种结构在不均匀的微波场中对物料干燥均匀性的影响.结果表明:转鼓微波干燥比水平转盘微波干燥更加均匀,对于不均匀的微波场,利用物料的随机运动可改善微波干燥的均匀性,从而提高干燥产品的品质.

Focusing on the inherent problem ,which is microwave drying non-uniformity ,the changes of the materials＇ location in microwave field will improve the uniformity of microwave energy absorbed and then improve the uniformity of microwave drying. The uniformity of microwave drying was compared in rotating turntable and rotary drum conditions. Rewetted soybeans were dried in experiments. Experiments show that the drying uniformity in microwave rotary drum is better than that in rotating turntable. The random movement of the materials will improve the drying uniformity in the non-uniform microwave field and hence improve the quality of product.