VERFAHREN UND VORRICHTUNG ZUR WIEDERERLANGUNG VON FESTSTOFFEN AUS EINEM STROM

摘要

A reticulated hydrophobic filter medium, in the form of a moving belt or covering on an inward-flow rotary drum, has a thickness of 3 mm or more and has 16 or more pores per linear cm. Filter cake is removed from the medium by reverse flow, which can be induced by a suction nozzle 26, with or without flexible shroud 26a, possibly downstream of a couch roll. Alternatively the couch roll itself can apply the suction and be located on the opposite side of the medium from an air or water delivery jet.