The dryer has absorbed the latest research achievements both at home and abroad, and is suitable for China's national conditions. Its biggest characteristic is unilateral operation, save manpower, double layer drying, high efficiency and energy saving, small footprint, save investment, single machine output is big, a top two. The fabric treated with this machine has a soft feel, a low shrinkage and no Yin and Yang surface. Suitable for processing cotton fabric with high crotch. It is an ideal substitute for single layer dryer at present. An air heat exchanger suitable for heating air by means of steam, hot water, and heat conducting oil. Widely used in the textile printing and dyeing industry air heating or cooling, the heat transfer performance is good, stable and corrosion resistance, beautiful appearance, easy installation, convenient management, durable