A hydrolyzer infeed system for supplying waste material to a hydrolyzer in a continuous manner, the infeed system comprises an infeed chamber, an inlet gate separate a chamber inlet from a chamber outlet, a ram disposed to reciprocate within the infeed chamber and compress waste material against the inlet gate when the gate is in the closed position and configured to push the compressed waste material past the inlet gate into a hydrolyzer when the gate is in an open position, an actuator operably coupled to the ram and configured to move the ram between retracted and extended positions. In one aspect, the ram extends past the inlet gate when in an extended position. In another aspect, an actuator position sensor operably coupled to the actuator generates a position signal representative of a position of the actuator and a corresponding position of the ram at all positions between the retracted ram position and the extended ram position.

The invention relates to a feeder and method for feeding raw material which comprises plastic to a gasification, pyrolysis or combustion furnace, in which the feeder comprises a screw feeder part and a pneumatic feeder part in order to form a combined feeder for feeding the raw material, the screw feeder part comprises at least a screw to transfer the raw material to the pneumatic feeder part and at least one cooling device to cool the raw material in the screw feeder part, and the pneumatic feeder part arranged after the screw feeder part comprises at least one inlet to supply pneumatic carrier material to the raw material in the pneumatic feeder part for forming a mixture of the raw material and pneumatic carrier material.

A hydrolyzer infeed system for supplying waste material to a hydrolyzer in a continuous manner, the infeed system comprises an infeed chamber, an inlet gate separate a chamber inlet from a chamber outlet, a ram disposed to reciprocate within the infeed chamber and compress waste material against the inlet gate when the gate is in the closed position and configured to push the compressed waste material past the inlet gate into a hydrolyzer when the gate is in an open position, an actuator operably coupled to the ram and configured to move the ram between retracted and extended positions. In one aspect, the ram extends past the inlet gate when in an extended position. In another aspect, an actuator position sensor operably coupled to the actuator generates a position signal representative of a position of the actuator and a corresponding position of the ram at all positions between the retracted ram position and the extended ram position.

A device for continually conveying dust-like or granular bulk materials into a pressure Chamber, having an inlet opening through which the bulk material is supplied or discharged from a bulk material storage, a housing which is arranged along a rotational axis, a conveying region which adjoins the inlet opening, and a shaft which rotates in the housing and which has a conveyor arranged on the circumference. The rotational axis, the housing and the shaft are arranged vertically, and a seal in the form of a regeneratable material seal stopper. The seal sealing the pressure chamber, is arranged in the conveyor region between the pressure chamber and the inlet opening. The housing has a polygon, a cannelure, or at least one helically running groove on the housing inner wall, and the orientation of the polygon, the cannelure, or the groove runs substantially perpendicularly to the two-dimensional orientation of the conveyor.