Changsha Develoina Heat-Energy Technology Co., Ltd. is specialized in studying material drying heat energy and heat recycling technology and equipment. With high technology talents studying drying mechanism and the whole drying system of thermotechnical theory in drying ventilation field, we have devised drying processes integrating cyclic heat utilization and devised heating systems, ventilating systems and hot hair exhaust systems with the use of heat energy. We not only make the whole drying processes follow the drying curve, but also effectively and economically use cyclic and recycled heat energy.