Patent ID: 8431085

Claim:
An apparatus for treating material, the apparatus comprising: a non-rotating pressure vessel having at least one opening to feed the material into the pressure vessel; a door to close the at least one opening of the pressure vessel; a pressure regulating system to change pressure inside the pressure vessel; and an agitation device to agitate the material received in the pressure vessel; wherein the agitation device comprises a drum, which is rotatably arranged inside the pressure vessel so as to be rotatable in relation to the pressure vessel and which has an open end to an inner space for receiving the material that is introduced into the pressure vessel via the at least one opening of the pressure vessel, the drum having a cylindrical wall designed to prevent the material received in the inner space of the drum from falling into an interspace between the drum and the pressure vessel as the drum rotates in relation to the pressure vessel; wherein the agitation device comprises at least one agitation blade mounted on an inner side of the cylindrical wall of the drum so as to act on the material received in the inner space of the drum as the drum rotates in relation to the pressure vessel; and wherein the apparatus further comprises a drive mechanism comprising a motor that is located inside the pressure vessel in the interspace between the drum and the pressure vessel that rotates the drum in relation to the pressure vessel.