Apparatus for sludge water withdrawal for sewage sludge thickeners

摘要

A planar slide (3) lies against the outside of a tube (2). Openings (14a, 14b, 14c, 14d) of the slide (3) can be successively aligned with openings (9a, 9b, 9c, 9d) in the tube (2). When openings are aligned with each other (14a/9a, 14b/9b, 14c/9c, 14d/9d), there is a flow connection between the surroundings of the tube (2) and the tube interior so that sludge water located at the relevant height can be withdrawn via the tube (2). The flat slide (3) can be actuated more simply than a rotary slide and can be laid sufficiently tightly against the tube (2) without special elastic seals. <IMAGE>