Traditional heating or drying methods like steam, hot air, coal burning are used as heat conduction function from the outside to inside of material, Thus, the heating and drying time is a bit longer, and the efficiency is lower, the heating result is not very homogeneous, and operate sometimes need pre-heat oven which cause energy wastage. The invention of microwave drying equipment has precisely dealt with the above problems, and is now widely used in food, chemical, grains and pharmaceutical industries.

Microwave radiation has the selective heating characteristic. For example, if material has a large moisture content that is water molecular polarity is very strong, it is more easily by microwave heating. So the higher the water content of products/ material quickly absorb microwave energy, which accelerate drying speed. When the moisture content decreased, the ability to absorb microwave was also reduced. The feature contributes to the drying result uniformly.

In the pre-drying, the moisture content in the products is very high, equipment of microwave power on the influence of the drying effect is high(water is the best medium absorbing microwave). When the time goes by, most of the microwave energy is absorbed by water, and moisture migration and evaporate quickly. In the later stage of drying, with the decrease of moisture of material, the microwave energy required is also less, and the power of microwave equipment can be diluted appropriately. But there are many products that are not able to dry under a high temperature so we should apply the microwave vacuum drying equipment or control processing temperature: in the condition of vacuum, the boiling point of water is reduced, vitamins and other nutrition are properly maintained. Under the environment of the relative lack of oxygen in food drying can reduce or even avoid the fat oxidation, Browning or other pigment oxidation, etc. Or we could install the temperature sensor which control heating temperature under a proper and low temperature.

The microwave drying machine is a non-standard product. The specific power size and design need to be combined with the product process so that the effect will be maximized. MAX microwave dryer can be customized to meet with our clients’ expectation.