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Microwave Drying

Unlike conventional oven drying, which is normally performed over the course of several hours to overnight, microwave drying yields accurate results in minutes, making it ideal for process control. Too much or too little moisture can cause out-of-specification product, resulting in poor or inconsistent product quality and increased production costs.

Microwave works only on polar molecules such as water(H2O). Under the effect of magnetic field, the molecules are turned from random distribution to the same direction along the direction of magnetic field. Affected by the high frequency magnetic wave, the molecules vibrate very fast and generate heat from movements and frictions, therefore the water is evaporated, and the material is dried.

Conventional drying (flame, hot air flow, electricity, steam, etc), which drying goods from outside in, takes much time for heat conducting deep down to the inner part. Microwave penetrates into the core part of the material and “squeeze out” the water from inside.

In theory, 1 kWh electricity energy microwave can draw out 1.39 kg water. According to some experimental statistics, considering cable loss and cavity efficiency, the real capacity is 0.8~1.1 kg water per kWh.