Potato flour drum dryer--Working principle
The potato flour rotary dryer is an internal heating and conduction type rotary drying equipment. Wet materials obtain heat through thermal conduction outside the drum, remove moisture, and achieve the required moisture content. The heat is transferred from the inner wall of the drum to the outer wall, and then passes through the material film. It has high thermal efficiency and can be operated continuously. Therefore, it is widely used for drying liquid or strip materials, and is more suitable for paste and viscous materials. The structural form can be divided into two forms: single cylinder and double cylinder dryers, and can also be divided into two forms according to operating pressure: normal pressure and reduced pressure.
　　
　　--Characteristics and Applications
1. With high operational flexibility and wide adaptability, it can meet the requirements of various materials and different production volumes
2. High thermal efficiency, with a general thermal efficiency of about 80-90%
3. Short drying time: The material to be dried on the outer wall of the drum can form a wet material film of 0.5-1.5mm at the beginning of drying, and the entire drying cycle is only 10-15 seconds, which is particularly suitable for heat sensitive materials
4. High drying rate: Due to the thin film and the direction of heat and mass transfer, the surface of the film can maintain 30-70kg The vaporization intensity of H2O (m2 · h)
　　
　　--Widely used in: dried products of Rice noodles, cereal, α starch, potato powder and other foods into flakes, powders and granules.