Device for thermolysis in stages

A device for thermolysis comprising:

• means of thermal energy input, at a temperature between 80° C. and 700° C., capable of regulating the temperature inside a chamber having a supply of raw material, an outlet of gas thermolysis and an outlet of solid or liquid products of the reaction from the thermolysis, said chamber enclosing at least one tray separating said chamber into an upper portion and a lower portion and at least one transfer member, wherein said transfer member and/or the tray is rotatably mounted around an axis, said raw material supply is placed over said tray, defining a first drop point of raw material thereon, said tray having a drain hole communicating between said upper portion and said bottom portion and arranged angularly after the first drop point of the raw material in the direction of relative rotation and said transfer member extends radially from the centre of said tray towards the wall of said chamber above said tray and said device includes at least one presser member extending above said tray between the centre of said tray and the wall of said chamber, and said presser member defines an air gap decreasing from the front to the rear of said air gap.