The dryer has several modes such as belt drying, drum drying, box drying, tower drying, etc.; the heat source includes coal, electricity, gas, etc.; the material has hot air flow type and radiation type during the drying process. The hot air drum drying is the hot air flow moving forward from the tail, fully in contact with the material, and fully utilized by the heat conduction, convection, and radiation heat transfer; the heat energy is directly transmitted to the material, so that the moisture of the material is continuously evaporated in the cylinder, and the material is fed. The air guiding device of the mouth extracts a large amount of moisture and wet airflow to prevent secondary pollution caused by dust efflux; through the internal spiral stirring, sweeping, copying the plate, pushing the material movement to complete the whole drying process; countercurrent conduction dehumidification, Avoid reducing the number of repeated drying procedures. The dryer can be divided into industrial and civilian. The industrial dryer is also called drying equipment or dryer. The civil dryer is one of the washing machines. It is generally used to remove clothing and other textiles after water is eluted. Moisture. The working principle of the ordinary conventional dryer is as shown in the figure. Under the suction of the fan, the fresh cold air outside is directly exchanged with the heater through the air inlet to become dry hot air, and then tumbling with the drum. After the clothes are heat exchanged, they are discharged out of the body, and the clothes in the drum are gradually evaporated and dried under the action of dry hot air. Since the moisture in the laundry needs to absorb and consume heat, the exhaust air temperature of the dryer gradually increases as the moisture in the laundry decreases. The main problem is that the heat dissipation of the heater and the heat dissipation of the casing are large, and the fluctuation of the steam pressure has a great influence on the energy consumption.