多馈源热风微波流态化干燥试验台

阐述了多馈源热风微波流态化干燥试验台的总体结构和工作原理,分析了微波干燥室、微波管开口位置和振动流态化装置的设计,确定了具体结构和相关参数。微波干燥室的总模式数为106,品质因素达到1 398,6管单面开口磁控管配置方式的微波场更为均匀,调节振动电动机频率可使物料处于流态化状态,保证物料更均匀地吸收热能和微波能。利用试验台对鲜胡萝卜的分段组合干燥工艺进行了试验,脱水胡萝卜颗粒之间的含水率差异在1.22%之内,保持胡萝卜原有色泽、气味和滋味的干制品合格率达到88.63%。

Multiple-sources Microwave Combining with Hot-air Fluidized Drying Test Device

The overall structure and working principle of multiple sources microwave combining with hot-air fluidized drying test device were described. The design of microwave drying chamber, the coupling transmission position of six magnetrons, and the vibrating fluidized device system were analyzed in detail, and their specific structure and main parameters were confirmed. The total mode number and quality factor of the microwave drying chamber were 106 and 1 398 respectively. The microwave field of six magnetrons single-side radiating microwave energy was more uniform, and the frequency of vibration motor could be adjusted to led materials uniform fluidized for different shapes and sizes of materials, so that the materials more uniformly absorbed the hot-air and microwave energy. The results of carrots performance experiment proved that the moisture contents difference of dried carrots was within 1.22%, and the dried product rate of maintaining carrot original color, smell and taste reached 88.63%.