The traditional heating and drying methods: steam, hot air, coal burning, are to use heat conduction to transfer heat from outside to inside, with long time, low efficiency, uneven heating and high energy consumption. The emergence of microwave drying equipment just addresses the above problems, and is now widely used in food, chemical and pharmaceutical industries.

The influence of microwave drying equipment power on product drying effect

Microwave has the characteristics of selective heating of substances: for example, water is a material with very strong molecular polarity and is more vulnerable to microwave heating, so products with higher water content are easy to absorb microwave, heat quickly and dry quickly; when water content decreases, their ability to absorb microwave is also relatively reduced.

In the early stage of product drying, the moisture content is very high, and the power of microwave equipment has a high influence on the drying effect. As time goes on, most microwave can be absorbed by water, and the moisture can be transferred and evaporated rapidly. In the later stage of product drying, with the decrease of moisture, the microwave energy needed is also less, and the power of microwave equipment can be diluted appropriately. But many products can not be dried at high temperature. At this time, microwave vacuum drying equipment is needed: in vacuum, the boiling point of water decreases, which can maintain nutrients, vitamins and so on. At the same time, in the vacuum system, the air content per unit volume is lower than that in the atmosphere. In this relatively hypoxic environment, food drying can reduce or even avoid the chance of lipid oxidation, pigment browning or other oxidative deterioration in food. Therefore, some products with high added value, such as Cordyceps sinensis and ginseng, are dried by microwave vacuum drying.

Microwave drying equipment is a non-standard customized product, the specific power size and design need to be combined with the product process, so that the effectiveness can be fully exerted.

Xi'an Shengda Environmental Protection Equipment Co., Ltd. can customize all kinds of equipment you need according to the needs of customers. The company has experimental machines. Welcome to negotiate and order experiments.

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