The drum dryer is a heat conduction dryer. During the work of the rotary drum dryer, the drying drum is continuously rotated, so the material is heated in multiple directions.This can maximize the use of heat energy. The utilization rate of heat energy of the rotary drum dryer is more than 95%. It is an essential product under the situation of energy saving and environmental protection.The drying mechanism is that when the temperature at the bottom of the dryer equipment reaches 400°C-800°C, the material is sent from the feeding chute by the elevator.Due to the angle difference and rotational movement of the lifting plate, the material is thrown by the lifting plate to move vertically . The materials are evenly dispersed in the dryer and fully contacted with the hot air to speed up the drying heat transfer and mass transfer. The contact time between the materials and air is extremely short, and the drying time is generally 0.5~5 seconds. For heat-sensitive or low-melting point materials, it will not cause overheating or decomposition to affect its quality.
During the drying process,the hot gas is generated by the lower hot blast stove,and moves from bottom to top.It fully contacts with the materials, and transfers heat to the material through heat conduction, convection, radiation and other ways.Therefore, the temperature of the materials continues to rise and the water is continuously evaporated.Under the action of the inclined lifting plate and the hot air flow, the materials that finally meet the moisture requirement is discharged from the lower outlet, while the gas with water vapor is drawn out by the fan through the chimney. The whole process is carried out in a closed environment, thereby reducing environmental pollution during the drying process, preventing the spread of epidemic diseases, and having good economic and social benefits.
