TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Components: The inert gas maintains a pressure which exceeds the pressure that prevails in the reaction chamber in the operation of the reactor. It is nitrogen gas. Preferred Device: The gap entirely separates the first part and the second part. The first part is located directly or indirectly on the shaft and the second part is located radially and/or axially next to the first part. The first part consists of the shaft and the second part is located radially and/or axially next to the shaft. Gap is of the labyrinth type. The shaft seal also comprises at least one gasket of conventional type. Gasket of conventional type consists of at least one graphite packing. The gap is located between the reaction chamber and the gasket of conventional type. The shaft extends in only one direction from the first part through and out of the housing. At least one support device together acts on a part of the shaft situated outside the housing, alternatively on an additional shaft joined to the part, the support device entirely supporting the reactor. At least one support device together acts on a part of the shaft situated outside the housing, alternatively on an additional shaft joined to the part, the support device partly supporting the reactor. The shaft is mounted in bearings in at least two planes extending primarily perpendicular to a principal direction of extension of the shaft, and where the planes are situated outside the housing. Support device comprises at least one stand. It comprises at least two bearings for the bearing mounting of the shaft in the planes. It comprises at least one bearing housing. Housing has primarily a cylindrical shape. It has at least one dismountable part. The dismountable part is attached to a remainder of the housing by screw joints and/or bolt joints. It is internally provided with wear-resistant material. The remainder of the housing is attached to at least one of the at least one bearing housing and is entirely supported by this/these. It is attached to at least one of the at least one bearing housing and is partly supported by this/these. It is attached to at least one of the at least two bearings and is entirely supported by this/these. It is attached to at least one of the at least two bearings and is partly supported by this/these. It is attached to at least one of the at least one stand and is entirely supported by this/these. It is attached to at least one of the at least one stand and is partly supported by this/these. The first part of the rotor comprises at least one hammer. At least one of the hammers comprises at least one fixed part and at least one articulated part. The fixed part is fixedly attached to the first part of the rotor and the articulated part is articulately attached to the fixed part. The articulated part has a center of gravity which is lying on a first radius of the rotor at the same time as an axis of rotation for the rotation between the articulated part and the fixed part is lying on a second radius of the rotor, the first radius trailing the second radius upon rotation of the rotor in connection with operation of the reactor.