ABSTRACT: In view of the influence of power change in microwave drying equipment, using soybean with 20% initial wet base moisture as model material, microwave drying was carried out with four schemes at power densities of 0.8 W/g, 0.6 W/g and 0.4 W/g, respectively. When the bursting waist rate exceeded 5%, the drying was stopped.
The results showed that in the drying process, the higher the power density, the lower the wet base moisture content of soybean, and the more energy needed.
In the process of microwave drying soybeans with different power densities, the power density should not be too high at the beginning of drying. There is no need to increase power density in the later stage of drying process, and excessive power density will cause a lot of waste of energy. Reducing different power density in microwave drying stage can effectively improve energy utilization efficiency.
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