Abstract: A laminated modular water filter includes superposed annular plates. A filter unit is disposed between each adjacent pair of the annular plates. The annular plates include a top plate, a bottom plate, a plurality of intermediate plates, and at least one flow-guiding plate sandwiched between two of the intermediate plates. Each of the top plate, the intermediate plates, and the bottom plate has an annular outer passage unit in fluid communication with a curved outer passage unit in the flow-guiding plate. Dirty water is introduced into two side openings in the top plate, and flows into central holes in the annular plates via the filter units so as to form filtered water. Solid particles in the dirty water are guided into two side openings in the bottom plate via the annular outer passage units and the curved outer passage unit.

Abstract: In order to provide a filter press which operates especially reliably and free of wear, a membrane for a membrane plate has a membrane surface enclosed by a membrane margin which is free of perforations. Furthermore, a membrane plate has such a membrane. Moreover, a chamber plate has a number of sludge inflows, each with an inflow orifice spaced apart from the chamber plate margin. Finally, a plate stack has a number of membrane plates and/or a number of chamber plates and also a corresponding filter press.

Abstract: A device (1) for detaching a filter cake which adheres to a filter cloth (4) of a filter press, comprising at least two deflection bodies (2, 3) around which the filter cloth (4) extends in an S-shaped manner and which can be moved in an approximately vertical direction, so that the S-shaped deflection brushes essentially completely over the adhering area of the filter cake. In order to achieve a complete detachment even in the case of filter cake which is not fully filtered out it is proposed filter cloth (4) extends in a sliding fashion during a relative movement between the same deflection bodies (2, 3) over a surface of one deflection body (3) and is provided with bend (8) in its course at a longitudinal edge (7) of said deflection body (3).

Abstract: The present invention relates to a filter device for completely removing residual amounts, after filtration, from the space of the unfiltered product. The filter device comprises a plurality of parallel filtration plates which are separated by filtration layers as well as by membrane plates submitted to the action of pressurized air. The membrane plates are exclusively covered on both sides by a stretched membrane, wherein said membranes have a smooth outer surface and are made of a flexible material so as to cover completely the adjacent space of the unfiltered product.

Abstract: A laminated modular water filter includes a top plate, a bottom plate and a plurality of superposed intermediate plates disposed between the top and bottom plates. Each adjacent pair of the top, intermediate and bottom plates are interconnected removably, and define an accommodating space therebetween, within which a filter unit is received fittingly. Each of the top and bottom plates has a central hole which is in fluid communication with central holes in the intermediate plates, and two side openings which are in fluid communication with a plurality of annular outer passages units in the intermediate plates that are in fluid communication with the accommodating spaces. Each of the filter units includes two filter films interconnected fixedly along outer peripheries thereof, and a filter net disposed between the films so as to define an annular filtered-water passage between the films that is fluid communication with the central holes.

Abstract: A pressure-filter apparatus includes at least one filtration chamber coupled with a source of slurry. The filtration chamber is also coupled with a source of fluid at an elevated pressure, which may be arranged in series or in parallel with a source of wash fluid. The pressure-filter apparatus may also include a source of fluid at a conventional pressure.

Abstract: The filter cake in a filter press is heated by direct contact with a heating plate opposite the pressing membrane so that a vapor phase is generated which moves uniformly in a planar pressure front through the filter cake to dry residual liquid therefrom. The filter cake is maintained under vacuum during the drying step.

Abstract: A method and apparatus for washing a filter fabric (3) of a filter press. The method includes filtering a material to be filtered containing a liquid and solids through the filter fabric (3) in a filter cell (20), retaining the solids on a surface of the filter fabric (3) thereby forming a filter cake (18) on the filter fabric (3), discharging the filter cake (18) from above the filter fabric (3) to one side of the filter press only, conveying an area of the filter fabric (3) soiled during the previous filtration step to a washing cell (21) for washing the soiled area of the filter fabric (3) and washing the soiled area of the filter fabric (3) in washing cell (21).

Abstract: A filter press having a horizontal stack of filter plate assemblies, in which removal of filter cake is automated by means of a vibration/shifter carriage that can be moved in steps along a stack of filter plates after a press closing head has been retracted. At each step, the carriage opens up a group of filter plates. The plates are vibrated vertically by cams carried by the carriage. The vibrating action alternately tensions and relaxes the filter cloth for dislodging accumulated filter cake. An improved cylinder and ram arrangement for actuating the closing head is also disclosed and comprises oppositely acting cylinder and ram units carried by an intermediate travelling cylinder carriage. The arrangement achieves the advantages of a telescopic cylinder and ram unit, but at lower cost.

Abstract: A vibration rod for simultaneously vibrating upper-portion support bars arranged to be upwards brought into contact with two ends of the upper-portion support bar to simultaneously vibrate the upper-portion support bars is disposed below the bar for supporting the upper portion of each of filter clothes each of which is disposed between filter plates; and washing pipes each having nozzles pointed to the filter cloth from a position above a gap between filter plates are disposed above the filter plates disposed in parallel so that cakes allowed to adhere to the filter clothes are separated by vibrating the filter plates simultaneously with opening of all of the filter plates. Then, washing water sprayed from the nozzles enables all of the filter clothes to simultaneously be washed and regenerated.

Abstract: Since a filter unit is formed by causing an upper portion support bar for a filter cloth put on a filtering surface of a filter plate to be engaged to a washing pipe integrally provided for the filter plate, a filtering mechanism portion of a filter press can easily be formed by mounting the filter units by a predetermined number. Moreover, the operation control and maintenance of the filter press can easily be performed.

Abstract: A filter press for the filtration of suspensions has a frame, a support plate (1), a pressure plate (2) mounted in the frame and a set of vertically arranged filter plates (4) between the support plate (1) and the pressure plate (2). The filter plate (4) is provided with a single layer filter fabric (8) on the side that removes the liquid and collects the solids. The filter fabric runs over two filter cake removal rollers (6, 7) that are so positioned relative to each other and relative to the fabric (8) that an S-configuration is imposed on the filter fabric (8) as the rollers travel along the fabric. A pressure application device (5) presses the filter plates (4) together. A cleaning pipe (17) with spray nozzles (17A) for cleaning the filter fabric (8) is positioned between the cake removal rollers. The single layer fabric reduces the filtering resistance, thereby increasing the capacity of the filter press.

Abstract: This invention relates to a filter cloth suspending apparatus in which a filter cake is produced by pressing sewage and waste water between filter cloths with filter plates, and the obtained cake is discharged. In the apparatus, an upper edge of the filter cloth (3) is supported on an upper supporting bar (13), on the other hand, a lower edge of the filter cloth is formed in a concave shape, and a suspending member (15) is connected to both corners (18, 20). Thus, the contact of the lower edge of the filter cloth with the upper supporting bar is prevented, and damage of the filter cloth is prevented. Further, sagging of the lower edge of the filter cloth is also prevented.

Abstract: The present invention relates to a method pertaining to press filters of the kind which include a plurality of press plates that can be brought towards and into mutual abutment and pairs of which form therebetween at least one pressure chamber, wherein there is formed in each pressure chamber as the aqueous suspension of solid particles is dewatered a filter cake which upon completion of the dewatering process is released from the chamber by separating the press plates so that the chamber will empty itself of its contents. The method is characterized in that emptying of the pressure chambers is achieved by permitting each press plate to rotate freely and swing about an axis which extends generally horizontally through the plane of the plate, under the influence of the released filter cake. The press filter is constructed so that each press plate is able to pivot in relation to the rails.

Abstract: A shifter mechanism for a filter press, which shifter mechanism incorporates a vibrating mechanism for effecting bumping of individual filter plates during the separation thereof from the closed stack to assist in dislodgement of filter cake from the individual filter plates. The vibrating device can selectively vibrate or bump the individual filter plates responsive to the weight of the filter plate being bumped, whereby the vibrating device will be activated only upon sensing a filter plate having a weight greater than a predetermined value so as to be indicative of an undesired quantity of filter cake being adhered thereto.

Abstract: A shifter mechanism for a filter press, which mechanism includes a reciprocal housing supported for movement along the press side rail, and a stop pawl mounted on the housing for stopping shifter movement in one direction, and a drive pawl mounted on the housing for effecting opening movement of the frontmost filter plate in the opposite direction. A vibrator is mounted on the housing and is rotated in response to linear movement of the shifter mechanism in the opposite direction to effect raising of the filter plate being shifted, followed by dropping thereof onto the side rail to impose an impact thereon to assist in loosening of the filtrate adhered thereto.

Abstract: The unloading device for filter press has upper means for supporting a series of filtering cloths which are associated with the opposite front surfaces of a corresponding series of plates arranged in a pack, the plates being compressible between a fixed head and a movable head, whereby to form a succession of filtration chambers into which the liquid to be filtered is fed. The supporting means are vertically movable between a raised filtration position, in which the filtering cloths are stretched, and a lowered unloading position, wherein an upper portion of the cloths forms a fold which is able to facilitate the separation of the bricks formed by the solid filtration residues. The unloading position corresponds to a limited opening of the filtration chambers.

Abstract: A filter press plate shifter assembly (21) provided with a shifter housing (22) having a tunnel-like center part which passes over the filter plates and housing parts positioned adjacent opposite side rails (14). Each side housing part mounts a pneumatic plate shifter (41) for permitting the endmost plate in the closed stack to be individually and sequentially shifted away from the stack into an open position when discharge of filtrate is desired. The shifter housing mounts a bumping device (61) which cooperates with the endmost plate in the stack to effect vertical bumping thereof relative to the support rails to assist in loosening sticky cake which adheres to the plate. The shifter housing also mounts an air-assist discharge mechanism (62) which includes a nozzle-bearing head assembly (80, 80') which moves vertically downwardly between the opposed faces of an open pair of adjacent plates for discharging airstreams downwardly against the plates to assist in removing the sticky cake from the plates.

Abstract: An apparatus for facilitating the removal of slurry, remaining in the feed core of a filter press having central feed filter plates, is disclosed. The apparatus is utilized during the core blow process of directing pressurized air into the feed core, in the opposite direction of the slurry feed, after the filtration cycle is completed. During the core blow process, the apparatus, which is attachable to the follower liner plate, facilitates the removal of remnant slurry by diverting the pressurized air within the feed core.

Abstract: A filter press plate shifter assembly provided with a shifter housing having a center part which passes over the filter plates and housing parts positioned adjacent opposite side rails. The housing parts are rollingly supported on rods which extend along the side rails. One housing part mounts a rotary pneumatic motor and a drive roller which drivingly engages the rod. Each housing part mounts a plate shifter unit having a pneumatic shift cylinder which is provided with relatively fixed and movable plate shifting blades. A pneumatic lift cylinder pivots the shift cylinder upwardly so that the blades project between handles of adjacent filter plates, following which the shift cylinder is energized so that the movable blade engages and shifts the endmost plate toward the open press head.

Abstract: A counterflow single-screw extractor includes a screw conveyor having a helical scroll formed from arcuate flight sections each having a plurality of elongated slots extending away from the direction of screw rotation and permitting the flow of effluent through the product and the flights in a manner controlled by the size, number, and orientation of the slots. The slots permit efficient extraction using relatively little extraction medium and at the same time permit a single-screw extractor to be used without having to periodically reverse the direction of screw rotation to unclog the slots and by the pitch of the screw conveyor. The inventive arrangement permits the use of a multi-section extractor employing different extraction media and/or different extraction media wash rates in different sections of the extractor.

Abstract: In a chamber filter press (11), two respective filter cloths (13), which enclose a filter plate (12) located therebetween, are fastened on said plate by means of a connecting part (18) and on the underside (19) thereof by means of lashings (14). The filter cloths (13) are free laterally with respect to the filter plates (12) and, when the chamber filter press (11) is open, they can be stretched apart from one another. The upper ends of the filter cloths (13) are provided with eyelets (20). In this arrangement, two adjacent filter cloths (13', 13") are fastened together on a series (21') of springs (21) which, for their part, are suspended on a mobile crossmember (22). The latter is supported on the chamber filter press such that it can be displaced parallel to the charging channel (17) and can move vertically. It is preferably supported on sliding guides or rails (23) which, for their part, may be supported on the chamber filter press (11) such that they can move in the vertical direction.

Abstract: A cake removing apparatus for use in a filter press has mounted on a movable frame of the press a pair of front and rear arms having main and auxiliary fabric beating members, means for pivotally moving the arms, and a a lift mechanism for the arms and the arm moving means. When the filter plates are retracted one by one for opening to remove a cake after filtration, the main and auxiliary fabric beating members are positioned above and at the respective front and rear outer sides of opposed filter fabrics as pulled out approximately to an inverted V shape between two opened adjacent filter plates. The arms are opened and closed at a lowered position, causing the main and auxiliary beating members to directly beat the opposed fabrics on the rear surfaces thereof opposite to their cake adhering surfaces to shake the fabrics.

Abstract: A filter press plate shifter assembly provided with a shifter housing having a center part which passes over the filter plates and housing parts positioned adjacent opposite side rails. The housing parts are rollingly supported on rods which extend along the side rails. One housing part mounts a rotary pneumatic motor and a drive roller which drivingly engages the rod. Each housing part mounts a plate shifter unit having a pneumatic shift cylinder which is provided with relatively fixed and movable plate shifting blades. A pneumatic lift cylinder pivots the shift cylinder upwardly so that the blades project between handles of adjacent filter plates, following which the shift cylinder is energized so that the movable blade engages and shifts the endmost plate toward the open press head.

Abstract: The present invention pertains to a filter press which includes a plurality of filter units arranged in tandem. Each unit has a filter plate and filter elements in the form of sheets at either side. Adjacent filter elements of adjacent units form pairs of elements. A working fluid containing liquid and solid components to be separated is charged at positions in between pairs of elements. The liquid filters through the elements into the plates to be exhausted. The solids build up in cakes intermediate the elements of the respective pairs. Each pair of elements is resiliently suspended from an eccentric rotor or shaft. When the cakes are to be dislodged, the press is opened, the units being parted. Rotation of the shaft cyclically slackens the filter elements and snaps them taut, thereby dislodging the cakes.

Abstract: A beer filtering device of a filter press type for filtering a beer stock. The beer filter device includes a plurality of filter plates (4) and a plurality of filter frames (6) arranged side by side in alternate relationship to each other. A filter element (28) is supported to each filter plate (4). A stock line (66) for supplying a beer stock and a filtrate line (68) for discharging a filtrate of the beer stock are so formed as to penetrate through the filter plates and the filter frames in the thickness direction thereof. The stock line and the filtrate line are sealed by a plurality of stock line seals (48) and a plurality of filtrate line seals (74), respectively, each interposed between the filter plate and the filter frame adjacent to each other in a filtering step. A plurality of washer liquid seals (76) are provided outside the stock line seals and the filtrate line seals in such a manner that each washer liquid seal is interposed between the filter plate and the filter frame adjacent to each other.

Abstract: A filter press plate shifter assembly provided with a shifting housing having a tunnel-like center part which passes over the filter plates and housing parts positioned adjacent opposite side rails. The housing parts are rollingly supported on rods which extend along the side rails. One housing part mounts a rotary pneumatic motor and a drive roller which drivingly engages the rod to control movement of the shifter assembly along the press. Each side housing part mounts a pneumatic plate shifter for permitting the endmost plate in the closed stack to be individually and sequentially shifted away from the stack into an open position when discharge of filtrate is desired. The shifter housing mounts a bumping device which cooperates with the endmost plate in the stack to effect vertical bumping thereof relative to the support rails to assist in loosening sticky cake which adheres to the plate.

Abstract: A compact filter assembly adapted for filter media retrieval comprises an in-line arrangement of a filter stack module, a filter media supply module for introducing filter media to the filter stack module, an extractor and separator module and a rewind module for receiving and collecting the filter media from the extractor and separator module in a condition suitable for storage, reuse or disposal, the in-line modules forming a straight-line path for the filter media and the extractor and separator module including first and second roller means arranged sequentially, each reversing the direction of travel for the filter media, and a lateral conveyor means for receiving and transferring filter solids tending to be separated from the filter media by the first roller means.

Abstract: In order that higher demands on the purity of the separated liquid can be satisfied, a cleaning plant (12) having wash chambers (13a,b) for the cleaning of the filter plates (8) is arranged in longitudinal direction alongside of a filter press (1). By means of a transport device (30) having a displacement device (32) which is moveable along rails (31a) and is equipped with a raisable and lowerable gripper (37) which can be engaged via pawls with filter plates (8), the filter plates, after the opening of the filter press (1), are transported one after the other into the cleaning plant (12), sprayed in one of the wash chambers (13a, b) with simultaneous drawing off of the air or subjected to an immersion bath, possibly disinfected or impregnated, dried and transported back. By the development of the cleaning plant (12) with two wash chambers (13a, b), idle paths of the displacement device (32) are substantially avoided.

Abstract: A method and apparatus for cleaning filter media in dewatering apparatus in situ includes an applicator which sprays a mixture of water and a cleaning agent onto a filter media as the applicator and media undergo relative movement. The cleaning solution contains selected oxidizers and dispersants to break the polymer bond and remove polymeric residues from the media without the need for removing the media from the apparatus.

Abstract: A plate filter press for the mechanical separation of solids from a liquid forming a suspension. The plate filter press is made of a plurality of vertical membrane plates and filter plates, the membrane plates and filter plates alternating. The space between the membrane plates and filter plates defines a filter chamber, which can be opened by moving the plates apart. An impermeable and flexible membrane is positioned in the filter chamber and is sealed to the periphery of the membrane plate. The space between the membrane and the membrane plate defines a pressure medium chamber for receiving pressure medium. The space between the membrane and the filter plate defines a suspension chamber for receiving the suspension. Finally, a woven metal fabric filter is positioned on each side of the filter plate. Both the filter plates and the woven metal fabric filters are planar. Liquid from the suspension is discharged through the woven metal fabric filter toward the interior of the filter plates.

Abstract: Filtrate separating device having a pair of walls connected by a frame defining a receiving space for sludge to be filtered. The walls being displaceable away from one another, and made of a flexibly deformable liquid and gas impermeable material.

Abstract: A filter press is provided with filter plates supported vertically in a horizontal row in a frame structure and with filter cloth disposed between the filter plates for treating slurries introduced between the filter plates. The filter press includes bars supported at a height above the filter plates to support the filter cloth, shafts disposed orthogonally under the bars, cylinders to move the shafts toward and away from the bars, and vibrators mounted on the shafts to vibrate the shafts. The shafts are moved to come into contact with the bars, and the vibrators are actuated to make the bars vibrate to drop cake remaining on the filter cloth when the filter plates are opened. The filter press further includes photoemissive and photoreceptive devices for detecting deflection and sinking of the bars due to weight of the cake on the filter cloth, and wash pipes for washing down the filter plates and filter cloth.

Abstract: A sludge volume of difficult to dewater sludge is subdivided in a sludge dewatering press into fractional volumes which are self-draining even at press pressures of 50 bar and more. The partitions are water-permeable and form water channels for conducting the expressed liquid away from the sludge volume.

Abstract: The invention discloses an improved method and apparatus for utilizing the principal of dewatering and drying a liquid/solid slurry. Unlike the prior known method of consecutive material thickening, filtering, crushing and then subsequent drying which is achieved by means of an appropriate apparatus for each of the above enumerated process steps, in the present invention all these process steps are achieved with only one apparatus.The apparatus for the implementation of this method comprises consecutively connected filter press, feeding-compressing container with pressure feed chamber and a built-in heat exchanger and vacuum collector with a vacuum pump. The apparatus for carrying out the method is compact, has low energy consumption, and environmental cleanliness. The method ensures that the separated liquid phase can be used as a heat carrier for industrial and municipal needs. In addition, the process of the invention is fully automated.

Abstract: The invention concerns a filtering procedure by which the solid matter and the fluid contained in a sludge are separated in a box filter. The sludge is passed in the filter into a filtering space (2) between two opposite filter cloths (3), where the fluid is separated, whereupon the cake (13) of solid matter produced is dried by passing a stream of air through it. The essential feature of the invention is that the drying is performed by passing a stream of air into the cake (13) first from one side and then from the opposite side of the filtering space (2) in such manner that the air flows in opposite directions through the cake during these drying phases. Penetrating through the filter cloth (3) into the cake, the air causes the cake to be detached from the cloth. When the filtering space is opened, the cake thus detached and dried can be removed directly without specific detaching efforts.

Abstract: The present invention relates to a method of and apparatus for pressure filtering, the pressure filter (1) used comprising pressure plates (3,4,5,6), which can be pressed against each other. Pressure chambers (8) are formed between the pressure plates and in each one of the pressure chambers two substantially vertical filter cloths are mounted. In order to loosen the filter cakes (32) from the filter cloths (9), means are used to produce sudden acceleration forces, e.g. directly or indirectly acting blow devices (34,36,38) or blow devices or lifting means, cooperating with stop surfaces, which devices and means are designed to drop the guide rails (12) from a lifted position, and/or shear forces, e.g., devices to displace the lower ends of the filter cloths in respectively opposite directions in the planes of the cloths.

Abstract: Disclosed is a filter press for removing water from sludge, which is generated when washing a concrete mixer truck or the like and which contains cement and sand, by means of a number of filter plates, which are arranged on edge and facing each other. Sludge is passed under pressure through the inside of each filter plate, thereby filtering out the water contained therein. The filter press comprises a horizontal track arranged above the filter plates and a carriage adapted to travel upon this horizontal track. The carriage is equipped with a vertical operation cylinder. Provided in the lower section of the vertical operation cylinder are a separating rod for separating adjacent filter plates from each other and nozzles for injecting water under pressure for washing the outer periphery of each filter plate.

Abstract: A filter press including a filter plate set suspended on top guide rails wherein the filter plates are covered on both sides with filter cloths, and with a plate-conveying slide movable along the guide rails. A vibrating device for shaking the filter cloths in order to eject the filter cakes is arranged on the plate-conveying slide, with shaking motion of the vibrating device being oriented predominantly perpendicularly to the filter cloth plane.

Abstract: An apparatus for effecting the separation of filter plates within a filter press is disclosed. The apparatus includes a guide track having mounted thereon a slidably reciprocal carriage. The carriage includes at least one pivoted pawl having an abutment space defined thereon for contacting a filter plate to be transported. The pawl is held in a raised orientation by a resilient spring means. The carriage is driven along the guide track by means of a pressure displaced piston mechanically associated therewith. The piston is housed within a tubular member. Positioned within the tubular member are two pressure chambers, one on each end of the piston. Pressurized fluid is controlledly introduced into one or the other of those chambers to effect a displacement of the piston. The pressure cylinder is of the type generally designated a rodless cylinder.

Abstract: A filter press according to the present invention comprises tension bearing means which are mounted on the filter plates respectively and which prevent movements of the forward ends of the filter cloths to bear the tensions for drawing out the forward ends of the filter cloths from the cloth reservoir means when the distance between the filter plates is decreased to bring the filter plates adjacent to each other into contact with each other, so that the tensions of the filter cloths are not applied to the drawing means when the distance between the filter plates is decreased. Therefore, attitudes of the filter plates are not changed by the tensions of the filter cloths and the filter plates can be brought into intimate contact with each other with constant pressure therebetween.

Abstract: A pressurized liquid filter in which a series of spaced apart, vertically extending filter plates are mounted between the sides of housing, inflatable hose seals extending across each top entrance and bottom exit. Filter media strips are draped vertically into the spaces, each disposed over a perforated sheet forming the outer layer of either side of each filter plate. The space between each pair of filter plates is subdivided into two filtering chambers by a dual element dewatering diaphragm mounted in a frame disposed centrally in each space. Liquid slurry is introduced into each chamber under pressure, flow induced to pass through the filter media strips and passing into vertical passages in the filter plates and into collection troughs extending along each row of passages.

Abstract: An apparatus for effecting the separation of filter plates within a filter press is disclosed. The apparatus includes a guide track having mounted thereon a slidably reciprocal carriage. The carriage includes at least one pivoted pawl having an abutment space defined thereon for contacting a filter plate to be transported. The pawl is held in a raised orientation by a resilient spring means. The carriage is driven along the guide track by means of a pressure displaced piston mechanically associated therewith. The piston is housed within a tubular member. Positioned within the tubular member are two pressure chambers, one on each end of the piston. Pressurized fluid is controlledly introduced into one or the other of those chambers to effect a displacement of the piston. The pressure cylinder is of the type generally designated a rodless cylinder.

Abstract: A filtration method includes steps of feeding liquid to be filtered into a filter medium between a fixed plate and a movable plate; and reducing capacity of a filter chamber formed by the medium by moving the movable plate in a direction in which the movable plate presses the fixed plate through the medium so as to perform expressing filtration of the liquid and to produce cake. The reducing step comprises alternately repeating at least one time an expressing pressure-increasing process for increasing pressure in the liquid in the medium by a specified increment in the filtration of the liquid, and an expressing pressure-maintaining process for maintaining the pressure constant during a specified period, so that the filtration is performed under a specified pressure corresponding to a desired water content of the cake to produce the cake. A filter press for employing the method has the filter medium arranged between the fixed plate and the movable plate capable of moving toward and away from the fixed plate.

Abstract: A filter plate press or an electrolyzer cell has a series of filter plates or cell frames, respectively, which are moved as a stack against a press or cell headpiece by a follower moved by one or more rodded cylinders mounted on a fixed bracket. Scissors mechanisms extending on each side of the press/cell holder and between the bracket and follower assure precise parallel movement of the follower with respect to the headpiece. To accommodate any cumulative errors in the stack dimensions the scissor mechanisms are disengageable upon closure of the press/cell holder so that the follower has freedom to match the abutting surface of the plate/cell frame stack and thus evenly seal the abutting peripheral edges of the plates/cell frames.

Abstract: A device for separation of constituents, separable in a filter, from a liquid medium, comprising a stack of a plurality of plate units (10), arranged one after the other, with filters (11) arranged therein. Along the filters there are arranged rotors (24) for scraping off coatings deposited on the filters. Each rotor is mounted on a separate shaft piece (22) arranged in each plate. The shaft pieces are connected to each other by means of connections which can be drawn apart in the stacking direction of the plate units. Defects in the device can be detected in a channel (20) which extends in the stacking direction of the plate units and which is common to liquid having passed through the filter. A defective plate unit can be shut off, while maintaining the separation device in operation, and be replaced without dismantling the entire device (FIG. 7).

Abstract: Apparatus for purifying rinse water used to remove excess resin from articles which have been impregnated with a sealant material. The impregnating resin is customarily a curable composition comprising acrylate monomer and anaerobic or heat cure initiator and results in the formation of an emulsion in the rinse water. A photoinitiator is added to the foregoing composition enabling the emulsion to polymerize when exposed to UV radiation. After the rinse water containing the emulsion has been so exposed, the resulting rinse water and polymer composition is filtered in one or more stages to remove the polymer, leaving substantially pure water as a result. The water, thus purified, can either be returned to the process for re-use or discharged to the environment.

Abstract: An apparatus for effecting the separation of filter plates within a filter press is disclosed. The apparatus includes a guide track having mounted thereon a slidably reciprocal carriage. The carriage includes at least one pivoted pawl having an abutment space defined thereon for contacting a filter plate to be transported. The pawl is held in a raised orientation by a resilient spring means. The carriage is driven along the guide track by means of a pressure displaced piston mechanically associated therewith. The piston is housed within a tubular member. Positioned within the tubular member are two pressure chambers, one on each end of the piston. Pressurized fluid is controlledly introduced into one or the other of those chambers to effect a displacement of the piston. The pressure cylinder is of the type generally designated a rodless cylinder.

Abstract: Method and apparatus for pressure filtering in a pressure filter (1) comprising a frame carrying press plates (3-6), which can be brought together and apart, said press plates between themselves forming pressure chambers (8). In each pressure chamber there are two filter cloths (9) forming a filter element, said filter cloths being connected to each other in one piece and hanging down from a suspension rod (58) resting on guide rails (86). During operation a suspension of solid particles in a liquid is introduced between the filter cloths (9) in the pressure chambers (8). The liquid is pressed through the filter cloths (9) under the influence of membranes (7) loaded by a pressurized medium and by blowing through a gas and is removed through drain channels (10, 12, 14). The filter cakes (40) remaining between the filter cloths (9) are discharged after bringing apart the press plates (3-6) by vibrating (98) of the filter cloths (9).

Abstract: The invention relates to an apparatus for cake removal in a filter press, and comprises a filter-cloth jolting mechanism as the cake removing means, with individual filter plates interconnected by loose connecting means for separating the filter plates one from another in equally spaced-apart relation. A jolting device for swinging the filter plates as carried by guide rails is connected to the filter plates, so that if the filter plates are caused to swing when they are in spaced-apart condition, lower end portions of adjacent filter plates are caused to strike against each other, such that a jolting effect is thereby given to associated filter cloths so that cakes are removed therefrom.