working principle

Drum dryer is an internal heating conduction type rotary drying equipment. Wet materials obtain heat transferred by thermal conduction on the outer wall of 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, so it is widely used for drying liquid or strip materials, and is more suitable for paste and viscous materials. It can be divided into two forms: single cylinder and double cylinder dryers. Additionally, it can be divided into two forms based on operating pressure: normal pressure and reduced pressure.

  Characteristics and Applications

High operational flexibility and wide adaptability, able to meet the requirements of various materials and different production volumes.
High thermal efficiency, with a general thermal efficiency between 80% and 90%.
Short drying time: The wet material film that can be formed on the outer wall of the drum at the beginning of drying is generally 0.5-1.5mm, and the entire drying cycle is only 10-15 seconds, which is particularly suitable for heat sensitive materials.
High drying rate: Due to the thin film and consistent direction of heat and mass transfer, the surface of the film can maintain a vaporization intensity of 30-70kg · H20 (m2 · h).
Widely used in food, meat products, yeast, starch, chemical products, dairy products, etc.

  technical specifications