Abstract: A plate filter press with chamber plates and diaphragm carrier plates and diaphragms secured thereto is provided that makes it possible to provide an adequately large, radial slurry admission cross-section that remains free of blockage. An annular supporting collar that respectively embraces the aperture edge of the chamber plate and has a U-shaped cross-section in its edge region is arranged in the central flow-through opening of every chamber plate, whereby the end of each U-leg comprises an annular seating wedge for supporting the arched diaphragm. The seating wedge extends in the direction of the respectively neighboring diaphragm and does not constrict the radial flow channel to the respective filter space.
Abstract: A filter plate transport device for filter presses has a slide block which can selectively move first and second directions opposite to each other along guide rails by a cable line. The slide block supports a driving pawl which engages behind a pillow block of a from filter plate in a filter plate stack each time the slide block moves in the second direction, and a drop lever is pointed towards the from filter plate each time the slide block moves in the second direction. To increase functional reliability, on the slide block, a control lever is supported which grips under the drop lever and which can be pivoted by the cable line around a horizontal axle between two stops on the slide block. The control lever, reverses the drop lever and driving pawl, which rests on it between a first position during plate transport and an second position during movement in the second direction of the slide block. The driving pawl and the drop lever mesh with a dynamic path of the filter plates when in the second position.
Abstract: A membrane plate for filter presses including a supporting plate with a clamping rim elevated on both sides, a frame, and a membrane clamped in place between the supporting plate and the frame. The membrane is enclosed inwardly of the clamping rim between two approximately V-shaped diverging contact surfaces of the supporting plate and the frame and is capable of elastic deflection toward both sides of the membrane. To attain a high resistance to continuous stress, the membrane is provided inwardly of the clamping rim with a wavy or undulation zone wherein the undulation or wave crests extend in parallel to the clamping ring. At least one outer undulation or wave crest is enclosed between two contact surfaces, with this wave crest projecting with a back surface thereof into a flaring space defined by the contact surfaces lying in opposition to a pressure medium chamber of the filter press.
Abstract: A chamber filter press including frameless chamber plates covered on both sides with filter clothes stretched thereover, wherein two adjacent chamber plates contact each other with an outer, continuous clamping rim and define a filter chamber, consisting of a central filter cake compartment lying between the filter cloths and two outer filtrate compartments lying between the plate and the filter cloth. Repressing devices for the filter cake are arranged in the zone of at least one of the two filtrate compartments of each filter chamber. The repressing devices are fashioned as distensible cushions suspended within at least one filtrate compartment of each filter chamber at the adjoining chamber plate by marginal suspension strips which keep open, at least at the lower edge of the distensible cushion. A liquid passage is provided between the half of the filtrate compartment on the filter cloth side and the half on the plate side.
Abstract: A filter press with central suspension of filter plates (5) is provided with a guide which ensures a flush alignment of adjacent filter plates, said guide lying outside the area affected by the filter medium, being integrated in a space-saving manner into the filter press, and permitting a certain amount of twisting or other overall adjustment of the filter plate package. For this purpose, the guide device is disposed on the filter plate suspension (9, 10, 18, 25) and is composed of at least one guide rod (19, 20) which is flexible to a limited elastic degree, and runs along guide members (1,2), and of at least one guide element (21, 22) for each filter plate (5) fitting around guide rod (19, 20), said elements being disposed on yoke piece (25) which supports rollers (19, 10) of the filter plate suspension.
February 27, 1987
Date of Patent:
August 16, 1988
Rittershaus & Blecher GmbH
Hans J. Heinrich, Max Oelbermann, Ernst-Gerhard Hohmann
Abstract: A membrane plate for a chamber filter press over which a filter cloth may be stretched on both sides thereof. The membrane plate includes an exchangeable substantially planar membrane member which is loosely enclosed between a bracket plate and a frame and is adapted to be clamped tightly between the bracket plate and the frame only by the closing pressure of the chamber filter press. The bracket plate and the frame, when the filter press is open, are adapted to be moved apart from one another along slide bearing pieces by a distance of 1 to 3 mm until the movement is limited by a stop. By enabling a relative movement when the filter press is open, the membrane is vented during times of stoppage of the open filter press or during ejection of a filter cake or a washing of the filter cloths so as to enable the membrane to readily readjust.
Abstract: The thickness of filter plates is a parameter determining the size of the useful volume of filter presses.It is desirable to provide a filter plate which can be dimensioned substantially thinner than heretofore and which moreover can be manufactured in supersize dimensions of, for example, an edge length of 3 m.times.3 m. To provide for high stability and a certain flexibility thereby enabling in a manufacturing of very large filter press plates having relatively thin bottom portions, the bottom portions of the filter plate is divided into at least four quadrants with each of the quadrants including outwardly curved portions, and with the outwardly curved portions of adjacent quadrants being in opposite directions with respect to a center plane of the filter plate.
Abstract: In a plate filter press with filter plates (8) suspended on support guides (3, 4), which filter plates are guided along stop rails (23, 24) for the purpose of preventing pendulating oscillations, the oscillation protection is to be constructed so that a required filter plate replacement or filter cloth exchange can be carried out without disassembly of the oscillation protection.For this purpose, the provision is made that the stop rails (23, 24) can be operatively adjusted away from the filter plates (8), and to attain this objective, the stop rails are preferably pivotable about axles (30, 31) extending in parallel to the longitudinal axis of the filter press.
Abstract: A conveyor device for pulling apart or conveying filter plates of a filter press. The conveyor device includes a carriage that is adapted to be moved along above the filter plates. The carriage is provided with a pawl and a drop lever that successively engage and transport filter plates, with the carriage passing from one end of the filter press to the other end of the filter press during one work cycle. The carriage automatically returns to a starting position at the other end of the filter press after a completion of the work cycle and, for this purpose, run-up ramps are provided at the ends of the filter press, with one of the run-up ramps being adapted to swing the pawl and drop lever into an opposite stop position so as to enable the elements to travel above the plates without contact. The other run-up ramp at the other end of the filter press again releases the pawl and drop lever and brings them back into a ready setting for a subsequent new work cycle.