When choosing microwave drying equipment, if the choice is not appropriate, it will greatly affect the drying effect of the product. How to choose the right drying equipment?

First, from the perspective of microwave drying efficiency, in the process of convection drying, the critical moisture content of highly dispersed materials in hot air is low, and the drying speed is fast. The same is true for the convection drying process. The critical moisture content of different drying methods is also different, so the drying rate is also different.

Secondly, the applicability of the selected microwave drying equipment is: the stronger the external electric field, the stronger the polarization effect. The faster the polarity of the external electric field changes, the faster the polarization, the stronger the thermal motion of the molecules and the friction between adjacent molecules. In this process, the conversion of electromagnetic energy to thermal energy is completed. When the heated material is placed in the microwave field, its polar molecules swing back and forth and rub at a microwave frequency of billions of times per second. The heat generated is enough to make the material reach the purpose of thermal drying in a very short time.

The drying device must be suitable for specific materials, meet the basic use requirements of material drying, be able to handle materials well (feeding, conveying, fluidization, dispersion, heat transfer, discharge, etc.), and meet the basic requirements of processing capacity, dehydration capacity, product quality, etc. In terms of operating costs, it can be divided into energy consumption and investment costs. Different drying methods have different energy consumption indicators. Generally, the thermal efficiency of conduction drying can theoretically reach 100%, while the thermal efficiency of convection drying can only reach about 70%. However, cost investment is another major factor to consider when choosing drying equipment. For example, if the cost of drying devices that perform the same function is relatively different, the lower one should be selected.