English Clays Lovering Pochin & Company

Other

George W Wall

Glyn T Jones

The inner assembly of a tube pressure filter comprises a supporting member or core (6) on which there is a facing assembled from laths (40). Each two adjacent laths (40) define between themselves a duct (42) and an aperture (44). In use, a filter element is provided on the outer surface of the facing. Filtrate passing through the filter element goes through the apertures (44) into the ducts (42) and then flow longitudinally of the inner assembly to a filtrate outlet. After filtration is complete, compressed air may be passed through the ducts (42) and apertures (44) to assist the discharge of filter cake from the filter element. In another embodiment (FIG. 6), a filter plate unit for a plate filter press comprises a recessed filter plate (102) of which the base of the recess is provided with a facing (112) made up, for example, of a plurality of laths (114). Adjacent laths (114) define between them a duct (116) and an aperture (118), the aperture (118) providing communication between the duct (116) and the region between the facing (112) and a filter cloth provided over the facing. In use of the filter plate unit, filtrate passing through the filter cloth passes through the apertures (118) into the ducts (116) to be discharged through the ports (128).

Pressure filters

The outer tubular assembly (4) of the tube pressure filter comprises a cylindrical member (36) and, at each end, an end assembly comprising two annular members (38 and 40) which are releasably secured to the cylindrical member (36) by a split retaining ring (42). The two annular members define a cavity (62) for receiving the lip of a diaphragm (18, FIG. 1). The axially inner annular member (38) defines, with the cylindrical member (36) an annular chamber (56) for receiving fluid under pressure and an annular slot (58) for allowing the fluid to flow between the chamber (56) and the interior of the pressure filter. The split retaining ring (42) engages a groove (52) in the cylindrical member (36), so securing the end assembly to the cylindrical member (36) without the need for welding.

Tube pressure filter

The inner assembly (2) of a tube pressure filter comprises a core (6) provided with a facing (36) made up of a plurality of laths. At the end of the core (6) there is an annular member (42, 44) which is retained in position between the facing (36) and a split retaining ring (60, 62). The retaining ring (60, 62) fits in a groove (58) in the core and is locked in position by locking elements (64) which fit into aligned recesses in the retaining ring (60, 62) and the annular member (42, 44) and are secured by screws (68).

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Par, United Kingdom

George W Wall