Device for conditioning and dewatering sludges in a filter press

摘要

The device comprises a conditioning part fitted with a mixing vessel, which serves for intimate mixing of sludge and a conditioning agent, and a pump part, connected by lines to the mixing vessel and to a chamber filter press, for delivering the conditioned sludges from the mixing vessel to the chamber filter press and for subsequent pressing of the sludges in the chamber filter press. The pump part comprises at least two reciprocating pumps which are driven essentially in opposite directions and are connected to a common delivery line. The pump drives are also controlled in such a way that the delivery stroke of one pump always starts before the other pump has finished its delivery stroke. This results in an essentially constant pressure level downstream of the pumps, because the pressure stroke, initiated with an advance, of one pump in each case is effective before the other pump has reached the outer dead centre. IMAGE