1. It has high heat efficiency, and its energy saving capacity is remarkable.
2. Inside the inner cylinder, materials exchange heat with hot air through radiation, convection and conduction, and in the outer cylinder, their heat exchange is achieved by conduction and convection.
3. Its shortened length facilitates its process layout. Its length is 40% shorter than that of monocular dryer, thus reducing the building area of factory as well as project investment.
4. A wide variety of material lifting designs make materials and hot air easier to be fully exchanged with each other.