1) Microwave drying is different from conventional hot air drying and other drying methods. Temperature gradient, heat transfer direction and moisture migration direction are the same in the drying process. The overall drying speed is increased and drying time is shortened. The drying rate of materials in the drying process mainly depends on drying power and wind speed.
(2) the microwave drying process of corn is divided into 3 stages: pre drying, constant speed drying and slow drying. The accelerated drying stage is longer. Most of the dehydration processes are in a relatively constant drying stage. In the drying stage, the moisture content gradually slows down. Therefore, microwave drying can be done according to the initial moisture content of corn.
(3) Drying power, drying temperature and drying wind speed are the main technical parameters of microwave drying of maize grain, which directly affect the drying time, quality and energy consumption after drying. The experiment shows that the best drying technology of microwave drying corn kernel is drying power.
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