In the Thin Layer Dryer, a high speed rotor centrifuges the product on the internal hot wall of a stator, heated with diathermic oil or steam, which transfers the heat to the “thin layer of sludge.” The water evaporation capacity ranges from750 kg/h to 3,000 kg/h.

The product to be treated is introduced into a drying chamber, constituted by a jacketed stator heated with diathermic oil or steam. Inside the stator a cylindrical coaxial rotor with adjustable paddles operates at a peripherical speed of 30 m/s.

The product is centrifuged on the stator in a thin layer of 5 mm thick, in contact with the hot wall.

The paddles mix and extract the dried product, while an air flow in countercurrent allows the extraction of water evaporated and cools the dried sludge simultaneously.

The limited amount of air has the only purpose of transporting the water evaporated during the drying process, while all necessary heat is provided by conduction through the wall of the stator.

The drying process is single passage, continuous without recycle. The dried product is granular, and dust free.