Microwave drying is a drying method that uses microwave energy to quickly heat and dry materials. It has the advantages of fast heating speed, high efficiency, short drying cycle and low energy consumption. Traditional drying methods include hot air drying, vacuum drying, etc.

The energy required to vaporize water is high, so effective drying requires a lot of energy. In materials with high water content, remove as much water as possible through mechanical means, such as pressing, squeezing or centrifuging, and then blow hot air across the surface of the material to provide the required vaporization energy.

The efficiency of hot air drying gradually decreases as drying progresses, mainly because the surface evaporation rate exceeds the migration rate of moisture inside the material to the surface. The drying process slows down, the effective length of the drying furnace increases, and the floor space increases, resulting in a lot of waste.

When the drying rate begins to peak in the low moisture content range, the heating characteristics of microwaves can be used to quickly migrate and evaporate the residual moisture in the material to the surface. In addition, hot air is injected into the microwave drying cavity to release water vapor more effectively and achieve better economic benefits. Microwave hot air combination has been used in latex, wood and other industries with good results.