Apparatus for partial dewatering of raw sludge comprising reciprocating plunger presses

摘要

Apparatus for partial dewatering of raw sludge, includes at least two filter units each defining a filter chamber which receives raw sludge and has an outer wall surface formed as filter for discharge of filtrate from raw sludge. Accommodated within the filter chamber is a double-acting plunger which extends across the entire cross section for dividing the filter chamber in two working chambers, and reciprocates in the filter chamber along the inside wall surface for movement between a first end position and a second end position, with each working chamber having an inlet for receiving raw sludge from a suitable conveying unit and an outlet for discharge of partially dewatered raw sludge. A control unit actuates valves for regulating a flow of raw sludge into the working chambers, such that raw sludge entering one working chamber forces the plunger to move from the first end position to the second end position, and raw sludge entering the other working chamber forces the plunger to move from the second end position to the first end position.