The multi-layer fluidized bed mixed dryer requires a shorter drying time than the single-layer fluidized bed due to its uniform residence time distribution. It can improve the uniformity of moisture content in dried products and make it easy to control the drying quality of the products. However, as the number of layers increases, the multi-layer fluidized bed dryer also needs to ensure the formation of a stable fluidized state between each layer, which increases the complexity of the equipment structure.

For materials without bound moisture, it is appropriate to use a multi-layer fluidized bed. The multi-layer fluidized bed dryer is suitable for drying granular materials such as polyester slices, sodium salicylate, aminophylline, oxytetracycline, streptomycin, tetracycline, tablet starch granules, sugar powder, feed, plastics, grains, etc. Therefore, it is often applied to products that are relatively easy to dry or products that do not have strict requirements for drying indicators. Intermittent operation can be used for drying materials with high moisture content. For materials with uneven particle size and certain viscosity, low bed operation with agitators installed in the bed layer is often used.

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Stirring dryer technology is a new type of drying technology that is different from any existing drying equipment. It has a unique drying principle and its unique heating method has made it dominate the market.

With unparalleled features of any drying equipment, its development is in line with the times and meets people's needs. In the future, microwave drying technology will become increasingly well-known and used by people. Microwaves have longer wavelengths than other electromagnetic waves used for radiation heating, such as infrared and far-infrared, and therefore have better penetrability. When microwave penetrates into a medium, the temperature of the medium increases due to the loss of the medium, causing the inside and outside of the medium material to heat up almost simultaneously, forming a bulk heat source state, greatly reducing the heat conduction time in conventional heating. Moreover, under the condition that the loss factor of the medium is negatively correlated with the temperature of the medium, the heating inside and outside the material is uniform and consistent.