In order to improve the drying rate of the hollow blade dryer and prevent uneven drying, mechanical stirring or rotating the container itself is usually used to increase or continuously update the heat transfer surface of the material. Therefore, it is necessary to conduct in-depth research on the adhesion problem of the heat transfer mechanism. The drying device itself is expensive, but its characteristics are that the dust collection system has a small load, high thermal efficiency, easy solvent recovery, and the total cost is much cheaper than direct drying method.

Hollow blade dryer is a horizontal stirring dryer mainly based on heat conduction. Due to the hollow mixing blades resembling ship paddles, it is referred to as a hollow blade dryer. The blade dryer has been developed abroad for many years, and this type of machine has developed a series of products with dual axis and four axis structures and multiple specifications abroad. The blade dryer was successfully developed by Germany, and later Japan introduced this technology and made improvements, developing a series of products with dual axis and four axis structures and more than ten specifications. Due to the fact that the heat required for drying the equipment relies on indirect heating through thermal conduction, only a small amount of gas is needed to remove moisture during the drying process. This greatly reduces the loss of heat carried away by the gas and improves the utilization rate of heat. The force drying hollow blade dryer is an energy-saving drying equipment. It is suitable for drying granular and powder materials, and can also smoothly dry paste materials.

Hollow blade dryer is suitable for processing various materials with good thermal stability such as paste like, granular, and powdery materials. It can also dry heat sensitive materials and recover solvents during the drying process under special conditions. Commonly used for drying or cooling materials such as carbon black, light calcium carbonate, barium carbonate, cyanuric acid, gypsum, clay, manganese dioxide, nylon and polyester chips, polyethylene, polypropylene (recycled solvents), etc.