This is basically a conduction dryer. Hollow drum is heated from inside by a heating medium, typically steam and wet material to be dried is applied on the drum surface in form of thin film by dipping the rotating drum in feed tray. Material film dries to the final moisture level and is scrapped off.
Features
Suitable for handling liquid or pasty feeds.
Product is powdery, flaky form
Uniform drying due to uniform application of film.