Hollow blade dryer can directly heat or cool paste, granular, powdered, and slurry materials, and can complete unit operations such as drying, cooling, heating, sterilization, reaction, and low-temperature calcination. The special wedge-shaped agitator heat transfer blade in the hollow blade boring machine equipment has high heat transfer power and self-cleaning function of the heat transfer surface. It is a continuous energy-saving dry equipment. Wedge shaped hollow blades are densely arranged on the hollow shaft, and the heat medium flows through the blades through the hollow shaft.

The unit effective volume has a large heat transfer area, and the temperature of the heat medium ranges from -40 ℃ to 320 ℃. It can be in the form of water vapor or liquid, such as hot water, heat transfer oil, etc. Direct conduction heating does not carry away heat with air, and the heat is used to heat the material. Heat dissipation is only for the purpose of dissipating heat to the environment through the insulation layer of the device body. The wedge-shaped blade heat transfer surface has self-cleaning function. The relative motion between material particles and the wedge-shaped surface produces a washing effect, which can wash away the attached materials on the wedge-shaped surface and maintain a clean heat transfer surface during operation. The shell of the hollow blade boring machine is W-shaped, and generally two to four hollow mixing shafts are arranged inside the shell. The shell has sealed end caps and upper caps to prevent material dust leakage and collect material solvents. Set up a stopper at the discharge port to ensure the height of the material level, so that the heat transfer surface can be covered by the material and fully exert its effect. The heat transfer medium flows through the shell jacket and hollow stirring shaft through the rotary joint. The hollow stirring shaft has different internal structures according to the type of heat medium to ensure better heat transfer effect.