Abstract: A revolving drum containing a rolling element is provided that includes a member for the cleaning of the inner wall areas of the revolving drum which has at least two cleaning zones. The cleaning zones include projecting cleaning elements and lie in tandem in an axial direction of the revolving drum. They include a fastening apparatus disposed on a front end pointing toward the infeed side of the drum and include a revolving articulation by which the rolling element can be fastened to a non-revolving component of a head of the revolving drum. The cleaning zones comprise generated surfaces of the revolving drum which are at an angle to one another.

Abstract: A revolving drum containing a rolling element is provided that includes a member for the cleaning of the inner wall areas of the revolving drum which has at least two cleaning zones. The cleaning zones include projecting cleaning elements and lie in tandem in an axial direction of the revolving drum. They include a fastening apparatus disposed on a front end pointing toward the infeed side of the drum and include a revolving articulation by which the rolling element can be fastened to a non-revolving component of a head of the revolving drum. The cleaning zones comprise generated surfaces of the revolving drum which are at an angle to one another.

Abstract: A method for low temperature carbonization of coal hydrogenation residues, wherein a coal hydrogenation residue is subjected to a reduced pressure distillation in a one-shaft or multishaft screw extruder, liberated gases and vapors are drawn off, and non-volatilized remaining material is subjected to low temperature carbonization in a screw extruder.

Abstract: A method of producing synthesis gas from coal hydrogenation residues, wherein a coal hydrogenation residue is subjected to a reduced pressure distillation in a one-shaft or multishaft worm apparatus where the gases and vapors evolved are withdrawn and the unvolatilized remaining material is re-pressurized and is then introduced into a gasification reaction.

Abstract: Apparatus for introducing solid fuels into a pressure gasification reactor comprising at least one conveyor worm turnable in a housing for conveying finely divided fuel, optionally mixed with a binder, and compacting the fuel into a gas-tight plug which is discharged through a discharge opening leading to the pressure gasification reactor. The discharge opening is provided with a closure member and the housing has an outlet opening also provided with a closure member near the discharge opening. The outlet opening is open to the ambient atmosphere. The closure members of the discharge opening and the outlet opening are alternatively actuatable such that when one is open the other is closed.