Abstract: A filter insert includes a plurality of annularly-shaped, bag-type filter sleeves (111, 112, 113) concentrically-arranged. The ends of the sleeves are attached to the flanges of an inlet plate 114, an annular terminal plate 124 or a circular terminal plate 121 (e.g. by ultrasonic welding). The filter insert is removably placed within a basket such that concentrically-arranged screens (160, 161, 163) of the basket support respective filter sleeves against radial flow during filtration.

Abstract: A process of oxidizing an ash and sulfur containing fuel such as coal in order to power gas turbines using a material such as the oxides of iron which in an oxidized state can be readily reduced and which in a reduced state is readily oxidized. Preferably, the oxides of iron are circulated between two fluid bed reactors and reduced by the ash and sulfur containing fuel in the first said fluid bed reactor and oxidized by air in the second said fluid bed reactor, with ash and SO2 in the gases leaving chiefly from the first said fluid bed reactor. The temperature is controlled within the second said fluid bed reactor by use of a clean fuel and the rate of addition of the ash and sulfur containing fuel to the second fluid bed is controlled so as to limit the amount of SO2 in the gases leaving the second said fluid bed.

Abstract: A filtration apparatus comprises a plurality of filtration sections such as (12, 13), each covered on both opposed faces by a filter cloth (14). Each filter cloth (14) is formed with a compressible edge bead (26) which is received in a corresponding groove (22-25) in a member (20) which extends between the sections (12, 13). The grooves each have an orifice for reception of the edge beads which is less than the diameter of the groove. Member (20) has a hollow core (21) to receive a sector dividing stem (17) to pass along and reinforce the member (20).

Abstract: A filter member for horizontal disc filters has a base plate having a peripheral edge and a hub connected to the base plate. The base plate has cavities extending in a radial direction of the base plate at a slant toward the hub, wherein the cavities are positioned closely adjacent to one another. The base plate has narrow projections formed between the cavities. A filter medium, providing a support for deposition filtration and cake-forming filtration, is formed as a thin filter plate with very small openings. The hub, the projections between the cavities, and the peripheral edge have support surfaces for supporting the filter plate. The filter plate is at least partially connected to these support surfaces by material bonding such as welding.

Abstract: In accordance with the present invention there is provided a dual manifold filtering system. The dual manifold filtering system of the present invention, unlike the currently available filtering systems, allows the filter elements to be cleaned from both ends of the filter elements during backwashing operations. A flow restriction device is also placed in the grid main channel of the filter elements to force more of the liquid to flow out radially from the grid main channel during backwashing. Valve and piping means are provided to enable liquid to be directed into one or the other manifold during backwashing operations.

Abstract: A remote filling device for use with a shipping container is described. A shipping container with specialized connections can be remotely opened using a single lightweight tool using a single drive screw latching mechanism. The actuation of the latching mechanism also compresses seals between the filling device and dewatering connections on the container. Dewatering is accomplished using reusable, backwashable filters. Once the container is filled and dewatered, the filling device is remotely removed and a lightweight, reusable lid is remotely scaled to the container using a single screw latch remotely actuated.

Abstract: The invention relates to a filter for the deposition filtration of liquids such as juice, wine, beer or the like. A filter packet (28) of plate-type filter elements (25), stacked one on top of the other, is disposed in a container (3), each filter element (25) having a hub (26) that is oriented in its position by a shaft (12) penetrating the filter packet (28). In the hub (26), there is provided an axial inlet line (36) for the material (18) to be filtered, which inlet line feeds by a plurality of inflow channels (46) which are situated to be uniformly distributed in the peripheral direction of each hub (26) and which lead substantially radially outwards. The inflow channels (46) open into an annular distributor space (47), from which the material to be filtered flows out. The material to filtered flows out via an outlet gap (45) situated above the inflow channels (46), radially into the space (29) between adjacent filter elements (25).

Abstract: A multi-arm spider fitting including a central hub from which such arms radiate. The arms are adapted at their extremities for coupling with filter modules, so that multiple filter modules can be secured to a single spider fitting, with the filter modules being arranged in a compact array to minimize the volumetric and spatial requirements of the filtration system. The multi-module filter assembly may be mounted on a motive cart, to provide for ready transport of the filter assembly between locations in a process plant.

Abstract: A disc filter sector having an improved attachment system includes a sector base and a sector neck. The sector base includes stiffening members that extend through the sector base and include an attachment end, such as a threaded fastener or region, at the neck mating end of the sector base. The sector neck includes a hold down member proximate the base mating end of the sector neck. To attach the sector base to the sector neck, a mating attachment member, such as a bolt extends through the hold down member of the sector neck and engages with the attachment end of the stiffening members. In one embodiment, the stiffening members, attachment end, and mating attachment members are disposed outside of the flow regions in the sector base and sector neck.

Abstract: A disc filter for separation of liquids from suspensions, in particular fiber stock suspensions, having several filter elements, in particular sector-shaped filter elements, which have a frame and filter areas mounted on both sides, over which a filter medium is mounted, with the filter areas having a lower-lying and higher-lying sections that form area filtrate channels, and having a center core which is provided with core filtrate channels. The filter elements contain collecting channels that receive and collect filtrate flow from the area filtrate channels formed by the lower-lying and higher-lying sections for delivery of the collected filtrate.

Abstract: A porous ceramic filter obtainable from a thin and flat green filter material, wherein round components are punched out of the green material and stacked, leaving at least one hollow interior that can communicates with an outlet, and the stack is then sintered together into a homogeneous unit. The green material is produced by casting, the separate components are punched out of it in the form of two flat disks (2 & 3) and a ring (4) with the same outside diameter, joined subject to pressure and leaving the interior (1), and sintered into a homogeneous unit.

Abstract: A rotating filter including a container (11) for a liquid or suspension to be filtered and a rotor structure (17, 21, 22, 25, 26) being provided at its outer periphery with a filter medium arranged in the shape of at least one circular ring (33) having its center in the rotational axis of the rotor structure and an extension in the radial direction substantially from the outer circumference of the rotor structure. Removal and discharge means (73, 93) is arranged radially outside the outer periphery of the rotor structure, extends substantially thereto along the radial extension of the filter medium and is adapted to remove filter cake material from the filter medium and lead it radially outward towards the radially outer limit of the filter medium.

Abstract: A filter mat for use in reverse rinsing filter devices consisting of at least two filter mat devices and one static rigid filter mat base. The filter mat produces evenly distributed reverse rinse channels that provide even distribution of pressure in the filter mat.

Abstract: In an axial flow fluid filter having two filter elements formed of layers of tissue wound around a central core, a fluid collector is positioned between two filter elements and has a central annulus which surrounds an axial flow path. The central annulus has a top surface perpendicular to the flow path. A rim annulus and a plurality of annular ribs have top surfaces coplanar with the central annulus which engage with an upper filter element. A plurality of radial ribs extend axially from the annular ribs and engage with a lower filter element. The annular ribs define axial fluid flow passages and the radial ribs define radial flow passages which direct filtered fluid into the central flow path. The fluid collector is formed as a unitary plastic injection-molded part which rigidly spaces apart two filter elements and which directs fluid flow to the outlet port of the fluid filter with minimal flow obstruction.

Abstract: An inlet plate is normally connected to an extruder and formed with an inlet port for supplying a molten synthetic resin under pressure to the port and an outlet plate is normally connected to or part of a mold and is formed with an outlet port in line with and confronting the inlet port for receiving the molten synthetic resin. A movable filter support engageable snugly between the plates at the ports thereof is formed with at least two laterally offset cavities each having an inlet side against the inlet plate and an outlet side against the outlet plate. This support element can be displaced between at least two respective positions in each of which one of the cavities is aligned between the ports for flow through the one cavity therebetween. A respective filter unit in each of the cavities has a plurality of separate cells each having an outside exposed to flow from one of the ports and an inside exposed to the other of the ports.

Abstract: The invention relates to a horizontal filter with a filter housing, in which an arrangement of superimposed, spaced filter elements is contained, and with distributor means supplying liquid to be filtered to the filter arrangement in a main direction of flow from below to the top, from which supply lines for the supply of liquid to be filtered branch off to the individual filter elements. A horizontal filter with a higher throughput is provided by the invention, since it is provided that the distributor means comprises distributor lines guided between the wall of the filter housing and the filter arrangement and supply lines in each case distributed across the circumference of the individual filter elements and branching off from the distributor lines, and that the supply lines are in each case provided with a flow reduction chamber, which has at least one communication opening to a distributor line and at least one outlet opening for the discharge of liquid to be filtered above the allocated filter element.

Abstract: Described is a filter apparatus equipped with tubular filter elements comprising perforated pipe sections with filter media attached to their outer faces. The flow of the liquid to be filtered is directed onto the filter bodies transversely of the pipe section axis. The filter bodies are preferably disposed in a circular array and interconnected to form a cage acting as a rotor revolving within a casing supplied with the liquid to be filtered. A plurality of such cages may be concentrically nested within one another, with neighboring cages revolving in opposite directions. This results in the creation of pulsing flow patterns in the liquid to be filtered, which act to prevent premature clogging of the filter media by sediments thereon (FIG. 6).

Abstract: A disc filtering apparatus for filtering liquids, such as fiber pulps suspensions, includes hollow filter discs, each of which has two opposed side walls of filter material. A plurality of circumferentially spaced support arms extend within each hollow filter disc, for supporting the side walls of filter material. Between the support arms, each side wall of filter material is supported by at least one wire member extending substantially along the filter disc and attached to the support arms.

Abstract: A continuous filtration device, comprising cells (1) arranged in a carousel around an axis of rotation and each presenting a horizontal axis of tilt, follower elements (9, 10), carried by a lever (7), at least one stationary guiding element (13, 14) for each of the follower elements, an additional lever (21, 22) fixedly connected to each cell, a mobile stop (23, 24) and an elastic element (29, 30) connecting the stop to a fixed support (25, 26) and acting on the stop in a first direction, the additional lever cooperating with the stop by acting on it in directions always approximately opposite to the aforesaid first direction.

Abstract: A filtration system for use in a settling tank includes a star shaped filter having equally spaced radial panels with the filter septums forming the downwardly extending sidewalls of each panel or compartment. The framework of the filter allows radial removal of the filter septums for cleaning and maintenance. A unique pressurized wet seal seals the filter to a clean liquid vacuum delivery duct and can also seal the system pump in the settling tank to the vacuum duct.

Abstract: A filtration system for use in a settling tank includes a star shaped filter having equally spaced radial panels with the filter septums forming the downwardly extending sidewalls of each panel or compartment. The framework of the filter allows radial removal of the filter septums for cleaning and maintenance. A unique pressurized wet seal seals the filter to a clean liquid vacuum delivery duct and can also seal the system pump in the settling tank to the vacuum duct.

Abstract: A filter nozzle equipped with annular filter discs which establish flow paths (26, 28), serving to conduct the filter liquid and which paths are radial (28) and also penetrate through (26) the filter discs (18). These passages (26) through the filter discs (18) are in themselves formed as passages (26) that become narrow in the flow direction of the filtered water, and are distributed uniformly over the disc (18). The discs (18) have projections which ensure that the passages (26) of two adjacent discs are not in alignment. With such a filter nozzle, the danger of blockage is much less than with known nozzles, assuring a steady operation and requiring less frequent cleaning.

Abstract: The filtering cell includes a tank having a base wall and a filter bed supported above the base wall which divides the tank into an upper compartment for receiving a substance to be filtered and a lower compartment for receiving a filtrate. The base wall includes an inclined end section adjoining an inclined drainage channel and further includes flow-off sections arranged on either side of the drainage channel. Because the drainage channel does not extend the full length of the cell, it can have a greater slope than in prior art cells, thereby enhancing fluid flow through the cell.

Abstract: An underdrain assembly contained within a swimming pool filter has a plurality of laterals, each of which is pivotable between a non-operating position and an operating position. Each of the laterals is threadedly attached to the underdrain assembly so that they can be replaced individually by unscrewing them from the underdrain assembly without removing the underdrain assembly from the filter. The laterals can be locked in their operating positions by either a reversible locking mechanism or an irreversible locking mechanism. With the laterals in their non-operating positions, the underdrain assembly and the laterals can be inserted into the filter as a unit.

Abstract: The filter element for use in a container includes a central pipe (2) closed along its length and also provided with an opening at a lower end thereof; a cylinder surrounding this central pipe in a concentric manner and having a closable lower end, the closable lower end of the cylinder projecting beyond the lower end of the central pipe and being provided with a base; and at least two cylindrical filter means (1), which are arranged radially and symmetrically with respect to the cylinder and which communicate with the cylinder, and a group of connecting pipes, each of the cylindrical filter means being connected by one of the pipes with the cylinder.

Abstract: A star-shaped filter nozzle has a central member and filter nozzle arms radially protruding therefrom. Each of the filter nozzle arms has one end removably connected in a lateral opening of the central member. The portions of the filter nozzle arms and central member connecting other are adapted to form complementary parts of a bayonet lock.

Abstract: The disposable analytical device includes an outer shell portion having an interior which is divided into reagent chambers and a test sample chamber. The reagent chambers are non-communicable with each other. However the test sample chamber is communicable with each of the reagent chambers through a semi-permeable membrane. The device is formed of an optic quality material to permit analysis of the test results in a spectrophotometer.

Abstract: A polymer filtering apparatus (1) is used to filter a molten polymer in a step of extruding a molten polymer to manufacture films and fibers. A plate type filter medium (4), which is incapable of resisting a filtration pressure, is supported at its rear portion on a liquid-permeable support member (5). Two pieces of filter media (4), (4) of the above-mentioned construction are arranged in opposition to each other so as to form a polymer passage (10) therebetween, and a polymer to be filtered is fed from this polymer passage (10) and through the filter medium (4) and support member (5). The plate type filter medium (4) and support member (5), which are detachably piled, can be separated, and the surfaces thereof can be easily washed. Moreover, the results of washing of both the primary and secondary sides can be inspected visually with ease.

Abstract: A filter (51) for liquids comprises a filter vat (52) having an inlet orifice (60) for the liquid to be filtered, an outlet orifice (58) for the filtrate, and an evacuation orifice (66) for solid particles, together with filter elements comprising filter medium cloths disposed vertically around filter leaves (18) inside said vat between said inlet and outlet orifices. Said cloths (12) are in the shape of elongate pockets (16) threaded freely over said leaves (18), said leaves being provided with longitudinal drainage channels (32), said pockets having openings (19) in communication with said outlet orifice (58), and said filter leaves (18) being suspended beneath supports (20) which are fixed inside said vat (52), with said leaves being free to rock sideways from their supports.

Abstract: An ultrafiltration system includes radially disposed housings for ultrafiltration cartridges, the housing being outwardly connected to ducts which communicate with a pump in the housing. The housings are radially disposed, to permit a relative reduction in height of the cartridges relative to the pump height level.

Abstract: A filter module for use in filtering particulates from a high temperature gas has a central gas duct and at least one horizontally extending support mount affixed to the duct. The support mount supports a filter element thereon and has a chamber therein, which communicates with an inner space of the duct through an opening in the wall of the duct, and which communicates with the clean gas face of the filter element. The filter element is secured to the support mount over an opening in the top wall of the support mount, with releasable securement provided to enable replacement of the filter element when desired. Ceramic springs may be used in connection with the filter module either to secure a filter element to a support mount or to prevent delamination of the filter element during blowback.

Abstract: For the separation of a slurry into cake and water, a set of rotary filter discs are mounted on a hollow shaft at constant longitudinal spacings and in positions of registry with one or more rows of bores in the hollow shaft. Each filter disc has a filter cloth or like filter element enveloping a carrier disc, so that the water that has passed the filter cloth flow into the bores in the hollow shaft through a gap between the carrier disc and the hollow shaft. Arranged alternately with the filter discs are baffle plates which also are each enveloped by a filter cloth for the separation of water from the slurry. Each filter disc has one or more flow accelerating members mounted astride the peripheral edge thereof. The flow accelerating members create cavities in the slurry with the rotation of the filter discs, thus facilitating the flow of the slurry between filter discs and baffle plates.

Abstract: Tilting filter pans is disclosed having generally parallel leading and trailing sidewalls which are sloped at an angle to permit increased filtration rates for a predetermined filtering efficiency, and also to permit increased filtering efficiency where the feed rate is constant. The feed is a slurry from which the liquid is removed, and the filter cake being dumped by rotation of each filter pan at a predetermined point of movement of the filter pan along a cyclical path. Hold-down devices having a reduced volume are also used in combination with the improved pan design, so that an increased filtration rate is possible due to decrease in the required filter cake height. A cam arrangement is provided for turning the pans with minimum stress in a minimum length of pan travel, while avoiding collisions between adjacent pans and while permitting washing of each pan.

Abstract: A rotary disc filter element having a large surface area for tank filters, such rotary disc filter element being composed of a hub, a circular bottom plate mounted thereon, a filter mesh clamped above it, and a supporting mesh arranged between the bottom plate and the filter mesh. The bottom plate is stiffened by corrugations which extend substantially radially and coaxially of the hub.

Abstract: A rotatable filter assembly, primarily intended for separation of fibers from a fiber suspension, comprises a number of annular filter discs (3) formed by a plurality of filter elements (5). The filter discs are mounted on a horizontal drum rotatable in a container (1) and formed by axial discharge tubes (6) and transverse tubes (7) which communicate with the individual filter elements (5). A collecting hopper (8) extends into the drum through an open end of it. During at least part of the rotation of the drum, the interior of each filter element (5) is kept at a pressure lower than that prevailing at the outside of it. The filter assembly is characterized in that the axial discharge tubes (6), as seen in a cross-sectional view, are arranged in groups each comprising at least two tubes.

Abstract: Tilting filter pans having generally parallel leading and trailing sidewalls which are sloped at an angle to permit increased filtration rates for a predetermined filtering efficiency, and also to permit increased filtering efficiency where the feed rate is constant. Drainage of the pans may also be improved. The feed is a slurry from which the liquid is removed, and the filter cake is dumped by rotation of each filter pan at a predetermined point of movement of the filter pan along a cyclical path.

Abstract: A rotating disc filter consists of disc sectors of preferably rustfree or acidproof steel about a filter shaft (9). Saddles (12) of a folded plate (1) form sector deck and support for filter cloth (4), and the troughs (13) of the folded plate together with the filter cloth abutting the saddles (12) form internal filtrate channels (11) extending from the outer periphery of the sector towards the filter shaft (9). Such a construction renders it possible to obtain sectors combining the requirements of large open filter cloth area, small internal volume affording for the filter operation an advantageously great ratio between filter surface and internal filtrate volume, high stability against lateral forces, and simple manufacture.

Abstract: The invention relates to a filter comprising main and secondary filtering stacks and a distribution valve provided with main and secondary enclosures adapted to isolate the filtering elements of the two stacks section by section with a view to deblinding them. According to the invention, a port, with which the distribution valve is provided, connects the main and secondary enclosures. One application of the invention is the production of a filter with high yield of filtration.

Abstract: The invention relates to a filter comprising main and secondary filtering stacks and a distribution valve provided with main and secondary enclosures adapted to isolate the filtering elements of the two stacks section by section with a view to deblinding them, the fluid issuing from deblinding being directed towards a discharge chamber. This chamber communicates with an enclosure without pressure via a duct and a complementary duct provided with a valve. One application of the invention is the production of a filter with high yield of filtration.

Abstract: A metallic profile wire screen for a filter surface for use with a tilting pan type filter exhibiting sufficient open area for acceptable liquid flow with optimum spacing between the profiled wires for the retention of solids being filtered.

Abstract: A cake filtration apparatus in a structural unit which comprises a plate filter and a filtering aid-dosing device which includes an agitator. The drive parts for rotating the filter unit are disposed on the top wall of the filter housing, and are connected with the drive of the agitator by means of a transmission device and a freewheel coupling. The shaft of the filter unit is only sealingly and rotatably mounted in the vicinity of the bottom of the housing. The bottom plate, the height of which is adjustable for removal of the centrifuged filter cake, is constructed in the manner of a disk valve having a valve seat, and can be raised and lowered independently of the filter unit, so that for centrifuging and removal of the filter cake, the filter unit no longer has to be raised or in some other manner moved out of its operating position.

Abstract: A horizontal rotary table filter includes a device connecting the filter table to the carrier structure which provides freedom of movement between the two in the radial direction, to thereby maintain the filter table in a substantially planar condition under adverse operating conditions. The device preferably includes a radially oriented slideway connected to one of the table and the carrier structure, and slide shoes or rollers connected to the other of the table and the structure and disposed within the slideway. In addition to enabling relative radial movement, the device is so constructed as to provide a space between the table and the structure and thereby thermally insulate one from the other. Also disclosed is a more stable carrier structure which includes circumferential and diagonal connecting members disposed between adjacent radial gussets.

Abstract: An in-line strainer for liquids including a housing having an inlet which enters the housing at its side wall and turns upwardly within the housing and is in liquid communication with an opening in an upper wall of the housing. Filtering elements are suspended from openings in the upper wall such that liquid exiting the inlet at the opening on the upper wall flows through the filtering elements and out of the housing through an outlet in the housing side wall oppositely located from the filter inlet in the housing.

Abstract: An anchoring device for anchoring a grid relative a frame member of a filter pan is disclosed. The anchoring device comprises an aperture defined by the grid. An open topped housing is rigidly connected to the grid with the open top of the housing registering with the aperture. An orifice is defined by the base of the housing and an inverted U-shaped strap removably extends through the orifice. The strap is rigidly secured to a cantilevered bracket which is rigidly connected to the frame member. A tapered surface cooperates with the strap and is removably wedged between the strap and the base of the housing.

Abstract: The invention relates to a filter comprising a housing at inside which are provided two separate filtering zones, isolated one from the other, each zone containing a stack of filtering elements; at least one admission orifice for the fluid to be filtered; one rotary fluid distributor arranged so as to be co-axial to said filtering elements; and a motor driving the distributor coupled to a first end thereof, whereas the second end of the distributor is free with respect to the actual body of the filter, and is guided in rotation by said bore alone.

Abstract: Filtering apparatus includes a shell with at least one filter leaf mounted in the shell to be rotatable about an axis. Means are provided for forcing a solid-containing liquid into the shell and into the leaf to form a cake of solids on the leaf. Means are also provided for removing filtered liquid from the leaf and the shell. A nozzle in the shell is disposed adjacent the leaf to direct a jet of sluicing liquid against the leaf as the leaf rotates. A sluicing liquid is supplied to the nozzle to wash solids from the leaf, and means are provided for moving the nozzle toward and away from the axis of leaf rotation in a plane substantially parallel to the leaf to remove solids from the leaf.

Abstract: In a filter for liquids including a housing which suspends multiple filtering elements and a cover. A grid is carried by the lower peripheral edge of the cover which overlies and holds the filtering elements in place when the cover is in sealing contact with the filter housing.

Abstract: A boiler or kettle filter, for liquids, with a plurality of disc-like filter elements arranged close to each other in the kettle or boiler. The filter elements are combined into a filter package. A lifting device is arranged in the kettle, and with it the filter package is capable of being lifted over and beyond the kettle or boiler edge by at least the height or level of the respective uppermost filter element.

Abstract: A diffusion washer and/or thickener assembly is provided that is greatly simplified. A number of withdrawal screens and fluid introducing structures are provided supported by spider arms which comprise conduits for introduction of liquid into and withdrawal of liquid from an elongated upright hollow vessel in which the assembly is disposed. The conduit means, with attached screen structures, is reciprocated up and down by a single linear actuator located preferably above the vessel and within the cross-sectional area thereof so that the wall of the vessel need not be penetrated by the conduits. The screens and fluid introducing structures remain stationary with respect to each other during reciprocation. A number of wiper blades, which may be operated by a single linear actuator, are provided at the top of the vessel for moving upwardly flowing pulp into withdrawal conduits surrounding the vessel periphery.

Abstract: A filter apparatus has an elongated shaft, a plurality of filtering elements mounted on the shaft and spaced from one another in direction of elongation of the latter, and means for cleaning the filtering elements. The cleaning means includes a source of cleaning medium under elevated pressure and a plurality of nozzle elements communicating with this source. The nozzle elements face toward surfaces of filtering material provided on the filter elements and are turnable relative to these surfaces. The cleaning medium is ejected from the nozzle elements at a pressure between substantially 5 and 100 bar toward the surfaces of the filtering material of the filter elements so that the cleaning medium removes a cake deposited during a filtering process from the surfaces of the filtering material and thereupon also cleans the filtering material of the filter elements.