Abstract: In order to improve the uniformity of microwave drying of germinated brown rice, the combination of bench test, computational simulation and theoretical analysis was used to analyze the distribution of microwave energy in the inner layer of microwave dryer, and the wind speed was dried on germinated brown rice during microwave drying. Uniformity effect.
The results show that there is wear and reflection between the feed ports on the microwave dryer with parallel waveguide feeds, and the microwave energy utilization rate is reduced. In the microwave drying process, the room temperature air is taken away to remove the water vapor evaporated from the germinated brown rice: low wind speed The water vapor capacity is weak, and the high wind speed will result in uneven airflow distribution, and the suitable wind speed is 0.5~1.0 m/s.
The introduction of ventilation during microwave drying can improve the uniformity of microwave drying and solve the problem of poor uniformity of drying due to electric field distribution from the drying process. The research results provide a basis for the drying chamber structure design and drying process optimization of the microwave dryer.
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