FILTER PRESS FOR FILTERING SUSPENSIONS, ESPECIALLY SEWAGE SLUDGE

摘要

A filter press for the filtration of suspensions has a frame, a support plate, a pressure plate mounted in the frame and a set of vertically arranged filter plates between the support plate and the pressure plate. The filter plate is provided with a filter fabric on the side that removes the liquid and collects the solids. The filter fabric runs over two rollers that are so positioned relative to each other and relative to the fabric that an S-configuration for the removal of filter cake is imposed on the filter fabric. A pressure application device presses the filter plates together. Spray nozzles for cleaning the filter fabric are combined with the rollers for the removal of the filter cake. Two such rollers are provided for each filter fabric of the respective filter plate and each filter fabric is of the single layer kind to reduce filter fabric consumption. The single layer fabric also reduces the filtering resistance, thereby increasing the capacity of the filter press. The lower and upper edges of the filter fabric are secured to the respective edges of the filter plate, and the rollers for the removal of the filter cake are moved up and down by a lifter.