Device for thermolysis in stages

A device for thermolysis comprising:

• a thermal energy input capable of regulating and maintaining an inside of a chamber at a temperature between 80° C. and 700° C.;
• wherein the device comprises a supply of raw material, an outlet of thermolysis gas and an outlet of solid or liquid products of the thermolysis reaction, said chamber comprising an upper wall, a lower wall, and a side wall 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 inner shaft, 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 center of said tray to the side wall of said chamber above said tray, and said device includes at least one presser member extending above said tray between the center of said tray and the side wall of said chamber, and wherein said presser member defines an air gap decreasing from the front, near the shaft, to the rear of said air gap, near the side wall.