Apparatus for drying a particulate product with superheated steam

Apparatus for evaporation of a liquid contained in a particulate product by means of superheated vapour as the drying medium, comprising a drying chamber and a heat exchanger and a device for separation of product particles and low temperature vapour, pressuretight connected to each other and communicating with the surroundings through a loading device for particulate product, an unloading device for particulate product and an outlet device for the generated surplus of low temperature vapour characterized in-that the drying chamber by and large has the shape of a cylinder, and-that the drying chamber has a horizontal position or has a minor deviation from that, and-that a rotor inside the drying chamber is elevating portions of the particulate product from the lower to the upper part of the drying chamber from where the portions fall down to the lower part of the drying chamber, through the current of superheated vapour.