Changzhou Xinli Drying Equipment Co., Ltd. roller scraper dryer has large operation flexibility and wide applicability. Many drying factors of the drum dryer can be adjusted. For example, the concentration of the feed, the thickness of the coating material film, the temperature of the heating medium, and the rotation speed of the drum can all change the drying efficiency of the drum dryer, and many factors are not involved. This brings great convenience to the drum drying operation, which can adapt to the drying of various materials and the requirements of different yields. The heat transfer mechanism of the drum dryer is heat conduction, and the heat transfer direction is consistent throughout the entire operating cycle. Except for the cover heat dissipation and heat radiation loss, the rest of the heat is used for the evaporation of the moisture content of the tube film, and the thermal efficiency can reach 80% 90%. The working principle of the drum dryer is to allow liquid or mud-like materials to form a film on the surface of the drum heated by water vapor or other heat carriers. The drum is dried during a revolution, and the product is scraped off with a scraper to expose the drum. The surface contacts the raw material again and forms a film for drying.