The hollow wedge-shaped blade heads are concentrated on the hollow shaft, and the hot substance flows through the leaves through the hollow shaft in a flow manner, resulting in a particularly large total heat transfer area in the drying process; The ambient temperature of the heating medium ranges from -40 ℃ to 320 ℃, and it may be in the form of vapor or liquid, such as vapor, rolling oil, etc.
Indirect heating, gas does not generate heat, and each heat generated is used to dry and eliminate the loss of raw materials from the insulation board. The surface of the wedge-shaped blade has a self-cleaning effect, and the relative velocity between the commodity particles and the wedge-shaped surface can clean the raw materials stuck in the wedge-shaped surface, thereby maintaining the cleanliness of the heat transfer surface during operation.
The shell of the hollow blade dryer is Ω - shaped, and the shell is generally equipped with 2 or 4 hollow stirring shafts. To prevent raw material leakage, the sealing of the shell is on the terminal cover and machine cover, and the heat transfer substance flows through the rotating connector, cylinder clamp shell, and hollow stirring shaft. To ensure the best actual conveying effect, the hollow mixing shaft selects different internal structures for different heating substances.
The characteristics of heating migration, cooling, and stirring enable the following unit operations to be completed: ignition (ultra-low temperature), cooling, drying (recovery of dissolved desiccant), drying, heating (melting), and reaction killing of dried bacteria. The stirring leaves are all heat transfer surfaces, thus enhancing the total heat transfer area of the effective volume of the enterprise and increasing the processing time.
