The belt dryer is composed of several independent unit sections. Each unit section includes a circulating fan, a heating device, a separate or public fresh air intake system and an exhaust exhaust system. The operating parameters of the amount of drying medium, temperature, humidity and exhaust gas circulation can be independently controlled, so as to ensure the reliability of the dryer and the optimization of operating conditions. The belt dryer is flexible in operation,

wet materials are fed, and the drying process is carried out in a completely sealed box, with good working conditions and no dust leakage.