Abstract: A device for removing floating material from a liquid, especially from sewage, has at least one sieve element shaped like a filter basket, for example, that in a front side has an inlet opening through which liquid can flow into the interior of the sieve element. The device is equipped with a drive so the sieve element can rotate around a rotation axis. A collection device is arranged within the sieve element for collecting the liquid and/or floating material, in which case the collection device is attached to a pumping-out device for the liquid and/or the floating material. A process for removing floating material from a liquid, especially from sewage, uses a sieve device that contains at least one sieve element that may be shaped like a filter basket, for example, and is equipped with a drive so it can rotate around a rotating axis.

Abstract: A membrane filtration apparatus includes a frame, in which a plurality of membrane members, an aeration device, a cleaning device, and a jet device are provided. The cleaning device includes a rail mounted on the frame; an up frame engaging the rail to be moved in the rail, a plurality of cleaning wires respectively having an end connected to the up frame and respectively passing through a space between each two of the neighboring membrane members; and a low frame connected to opposite ends of the cleaning wires. A motor is provided to move the up frame so that the cleaning wires are reciprocating in the space to scratch the sludge off the membrane members.

Abstract: A water treatment apparatus includes a tank, a driving unit, a filtered-water pipe, a filtering unit and at least one scraping unit. The tank includes a wall, an inlet pipe extending through an upper portion, and an outlet pipe extending from a lower portion. The driving unit is located on an external side of the tank. The filtered-water pipe extends throughout the tank and is connected to the driving unit. The filtering unit includes flat filtering bags located around the filtered-water pipe. The flat filtering bags can be spun together with the filtered-water pipe. The scraping unit includes scrapper assemblies each located between and in contact with two adjacent ones of the flat filtering bags.

Abstract: An apparatus and method for skimming oil and other liquid hydrocarbons and contaminates floating at the surface of a body of water or other suspending liquid. A rigid skimming surface such as a drum or disc is floatably supported on pontoons. The skimming surface is rotatable about an axis substantially parallel to the water surface. The skimming surface is covered with removably attached sorbent material which improves the efficiency of the oil recovery operation and which, when worn or soggy, can be removed and discarded without discarding the skimming surface.

Abstract: The filter device is provided with a housing (1) and with a stack of filter plates (10, 11) arranged therein at a spacing from one another. The housing includes an inlet (7) for the fluid to be filtered, an outlet (9) for the filtrate which is connected in a conducting manner to the inside of the filter plates (10, 11), and a cavity extending through the stack and formed by recesses in the filter plates (10, 11). The filter plate stack is arranged fixed to the housing, and a centrifugal pump (14) with several impellers (15) is arranged within the filter plate stack. This pump ensures an intensive through-flow of the filter plate stack and thus a removal of the filter residues.

Abstract: A quickly cleanable water processor includes a shell, a water pipe, at least one filtering unit and a cleaning unit. The shell includes a space defined therein, a water inlet, a water outlet and an air inlet. The water inlet and outlet and the air inlet and outlet are in communication with the space. The water pipe is disposed in the shell and made with slots in communication with the water inlet. The filtering unit is detachably provided around the water pipe. The filtering unit includes alternately arranged membrane bags and water-guiding discs. The cleaning unit includes an air pump and an air pipe extended into the shell from the air pump through the air inlet. The air pipe includes apertures through which air reaches the membrane bags from the air pipe.

Abstract: A filter device includes a housing (2) having at least two rotation bodies (4,) which are arranged therein and are driven by a shaft (3). The rotation bodies (4) are designed and arranged for producing a centrifugal pumping effect. A guidance device (7) is provided between the rotation bodies (4), which connects the pressure side (6) of a first rotation body (4) to the suction side (5) of a rotation body (4, 18) arranged therebehind in the flow direction (8). The intermediate spaces between the rotation bodies are provided with a filter arrangement.

Abstract: An apparatus for filtering liquid that includes a filter having an external surface; a rotatable shaft extending through the filter; and a movable member coupled to the rotatable shaft. The movable member is configured to impart a suction force at various locations across the external surface of the filter. The movable member has a trailing portion that extends further than the leading portion in the direction toward the filter.

Abstract: The present invention relates to stationary cloth media filtration systems and devices, as well as processes and devices, including improved cloth media filter backwashing using a rotating backwash arm assembly.

Abstract: The filter device is provided with a housing (1) and with a stack of filter plates (10, 11) arranged therein at a spacing from one another. The housing includes an inlet (7) for the fluid to be filtered, an outlet (9) for the filtrate which is connected in a conducting manner to the inside of the filter plates (10, 11), and a cavity extending through the stack and formed by recesses in the filter plates (10, 11). The filter plate stack is arranged fixed to the housing, and a centrifugal pump (14) with several impellers (15) is arranged within the filter plate stack. This pump ensures an intensive through-flow of the filter plate stack and thus a removal of the filter residues.

Abstract: A positive pressure disc-type filtration apparatus (10) including a collection trough (40) internal to the cylindrical pressure vessel housing the filter discs (24). The collection trough (40) is entirely disposed within the cylinder of the pressure vessel (12) and configured and located to receive and direct filter cake removed from the discs (24) and then reslurried and sluiced toward the center of the trough using jets of liquid (32), to be discharged longitudinally centrally through a single outlet extending downwardly from the trough and through the wall of the pressure vessel (12). A method of filtration is also disclosed.

Abstract: The invention encompasses a system for the cross flow filtration of fluid media using membranes. The system has in a first embodiment two shafts, only one of which is hollow, with each shaft running through an axis of its given disc. The disc of each shaft is positioned offset with respect to one another to have a region of overlap therebetween. The region of overlap serves to enhance the efficient operation of the system by reducing the degree of settling of retentate on the disc of the hollow shaft, because of the wiping or cleaning effect achieved upon rotation of each shaft by a drive system. In another embodiment, both shafts are hollow.

Abstract: A precoat renewal system for a filter, such as a disc filter. The renewal system includes a plurality of nozzles coupled to spray piping and valving with each nozzle being positioned for spraying an area of one side of a disc. The nozzles and at least a portion of the spray piping is movable such that the nozzles may be displaced relative to the discs. The nozzles and piping are arranged in groups or zones with each zone covering a specified percentage of the discs in the filter and each zone representing about 40% or less of the surface area of the filter media of the discs in the filter. Each zone is configured such that high pressure fluid may be supplied to that particular zone for removal of a precoat layer on the disc. The system may be configured so that other zones may be concurrently washed with a lower pressure fluid. The zones may be sequentially or otherwise segmentally provided with high pressure fluid until the precoat layers of each respective zone have been removed and renewed.

Abstract: A solid-liquid separating apparatus comprising a cylindrical strainer formed by circular ring members with gaps in between, a casing having the strainer therein, and scrapers disposed in the respective gaps between the circular ring members for removing solid matter adhering to the end (flat) surfaces of the circular ring members. Each of the scrapers comprises a flat auxiliary circular ring member and a flat protruding element. The external diameter of the auxiliary circular ring member is smaller than the external diameter of the circular ring members and is larger than the internal diameter of the circular ring members, and the protruding element extends from the outer circumferential surface of the auxiliary circular ring member. The auxiliary circular ring members are disposed coaxially with the circular ring members, and the tip ends of protruding elements reach the outer circumferences of the circular ring members.

Abstract: A rotating filter having at least two annular filter disks each having a plurality of filter elements and being carried by a shaft for rotation about an axis perpendicular to the planes defined by the disks. A discharge chute extends into the space between the filter disks for discharging solids removed from the facing filter elements. An axial spacing between the first portion of the upper edges of the chute located radially inside radially inner edge portions of the facing filter elements of the adjacent filter disks is not less than an axial spacing between the inner edge portions, and an axial spacing between a second chute portion of the upper edges located radially outside the radially inner edge portions is not more than the axial spacing between the inner edge portions of the facing filter elements.

Abstract: A self-regenerating filter unit having a housing which carries an ultrasonic transducer periodically energizable to dislodge caked solids from a filter element in the housing. The removed solids collect in a storage zone where they are periodically removed.

Abstract: A dynamic filter system includes a dynamic filter assembly including one or more filter elements and one or more members disposed within a housing. The filter elements and the members are interleaved and arranged to rotate with respect to one another. The dynamic filter assembly preferably includes one or more mechanisms to prevent preferential fouling.

Abstract: A dynamic filter system comprises a dynamic filter assembly including one or more filter elements and one or more members disposed within a housing. The filter elements and the members are interleaved and arranged to rotate with respect to one another.

Abstract: A device for filtering a liquid substance comprising a container (1) having an inlet (2), a rotor (6), an inner rotor part (7), at least one disc filter (8). Spray nozzles are provided for releasing material filtered away from the substance and deposited on the filter disc. Furthermore there are conveyors (17) for removing the material released.

Abstract: A rotating disc filter for separating coarse phase from a liquid mixture having carrier elements and blocking means that prevent the coarse phase from falling back into the pool of incoming liquid mixture. The capacity of the filter is increased by the prevention of the coarse phase from being filtered again and thereby occupying filter area.

Abstract: A filter cartridge for separation of aqueous colloidal suspensions utilizing a shell which forms a chamber having a colloidal suspension inlet and outlets for permeate and concentrate streams. A core is placed within the shell and includes a plurality of filter elements which are located in overlying relationship with one another. Each filter element possesses a relative rigid backing member and a filter membrane. The core is fastened to the shell by connecting a plurality of the backing members to the body of the core.

Abstract: A septic system filtered pump vault comprises a housing for an effluent pump, a plurality of effluent filters contained within a filter compartment that is located in the housing, a filter support within the housing. The filters are secured to the filter support in spaced relation to one another so as to provide filtering sections between the filters. The filter support includes at least one backflush conduit provided with a plurality of backflush orifices oriented to direct backflush fluid into the filtering sections onto upper surfaces of the filters. An effluent pump is contained within the housing for effecting flow of effluent through the effluent inlet and through the filters. The pump includes a discharge conduit for discharging filtered effluent from the housing. Valving communicates with the backflush conduit and the discharge conduit so that the pump may be selectively communicated with the backflush conduit to effect backflushing of the filters with filtered effluent.

Abstract: A dynamic filter system comprises a dynamic filter assembly including one or more filter elements and one or more members disposed within a housing. The filter elements and the members are interleaved and arranged to rotate with respect to one another.

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 suction head arranged between a filtrate channel and a barometric leg of a rotating filter having at least one filter means communicating with the filtrate channel. The filtrate channel is connected to the barometric leg through the suction head. In order to ensure continuous conveyance of air bubbles brought along the filtrate, the upper internal boundary of the suction head as regards flow towards the barometric leg is nowhere located at a level above the upper internal boundary of the barometric leg.

Abstract: Filter for continuous filtration of liquids containing solids in a closed cylindrical vessel with a pressure difference between the liquid to be filtered and the filtrate, with disks which are formed by hollow filter sectors and supported at a distance from one another on a driven horizontal hollow shaft normal to the shaft, with filter beds on both sides of every filter sector and a hollow space located between the latter allowing the filtrate to flow out through the hollow shaft, and with devices which are movably pressed against on both sides of every filter disk for removing and discharging solids from the filter beds forming the outer sides of the filter disks and for cleaning these filter beds, wherein every device for removing and discharging solids from and cleaning the filter beds is formed by a closed hollow box unit which is completely surrounded by the liquid to be filtered and has a plurality of chambers which are separated from one another, wherein every chamber has at least one inlet gap compre

Abstract: Apparatus for continuously separating a solid fraction from a liquid fraction in a mixture of such fractions has a stationary cylindrical vessel which is filled with the mixture and confines a rotary carrier as well as a battery of parallel disc-shaped filters mounted on and rotating with the carrier. The filters define internal chambers for separated liquid fraction and have foraminous walls which flank the respective chambers and intercept the solid fraction. The intercepted solid fraction is removed by stationary devices having receptacles immersed in the mixture, defining internal compartments for solid fraction and carrying sealing elements which prevent penetration of mixture from the internal space of the vessel into the compartments. The separated liquid fraction is evacuated fom the vessel through a channel in the carrier, and the solid fraction is evacuated from the internal compartments by suction and/or mechanically.

Abstract: A fibre suspension is separated by a filter device having a hollow filter body (1) with a wall (2) of filter material, and a container (3). The entire fibre suspension to be separated is sprayed in the form of at least one liquid jet onto said wall (2) to force a fine fraction of the suspension containing most of said undesired particles through said wall of filter material into the hollow filter body, thereby leaving a created coarse fraction of the fibre suspension mainly containing fibres in the container outside the filter body. Relative displacement between the liquid jet and the filter material is provided. Said created coarse fraction is dewatered through the wall of filter material, and said dewatered coarse fraction is discharged from the container.

Abstract: The device is the dual functional filter of the slurry, scraping of the filtered cake, compression the scraped cake and discharging the compressed cake, continuously. The device is composed of both the filter part and the cake compression part. While the filter part is positioned upward holding the filtrate room, the slurry chamber and the filter medium in between, the lower cake compression part contains the screw blade attached to the shaft stationed from the top of the filter part to the end of the cake compression part. The filter cake piled on the filter medium during the filtration of the slurry fed under pressure, is scraped by the scraping blades attached to the shaft or, if necessary, peeled off by the pressure flashings of the back wash liquid through the cake on the filter medium. Precipitated cakes from the above is compressed in the compression part by the screw.

Abstract: Disclosed is a filter press comprising a substantially cylindrical vessel, a plurality of filter elements disposed in the vessel parallel to one another, and a rotor having a rotor shaft rotatably mounted in the vessel and a plurality of rotor elements fixedly connected to the rotor shaft and extending each between two adjacent filter elements, the surface of the rotor elements being adapted to be forced towards the filter elements for mechanically compressing filter cakes accumulated thereon, wherein the axis of the vessel is disposed in an upright position, the filter elements and rotor elements being formed as cylindrical wall members disposed in concentric relationship to one another with the rotor elements extending into the spaces between adjacent filter elements and being secured to a mounting structure connected to the rotor shaft, while the filter elements are supported on a carrier grid in the vessel.

Abstract: A method and apparatus for doctoring (cutting) the solids off a precoat filter. A stationary doctor blade continuously doctors mud (from a mud bath) from the surface of a rotating porous surface vacuum drum. A traveling doctor blade, located upstream of the stationary doctor blade, moves back and forth along the drum. The stationary blade extends the width of the rotating vacuum drum while the traveling blade is shorter and is also located nearer to the drum surface.

Abstract: The filter unit is of the type comprising a casing (2), filter tubes (5) associated with a filtering surface (6), shaker means (7) for the filtering surface (6), a suction pipe (10) associated with the casing and a suction pipe (11) associated with one or more turbines and characterized in that the casing (2) comprises above the filtering surface (6) at least two separate chambers (13,13') each independently connected to the suction pipe (11) associated with one or more turbines.

Abstract: A backflushable filter including a housing having an inlet coupled to an upstream fluid inlet and an outlet coupled to a downstream fluid outlet, a filter assembly including a plurality of cylindrical filters, defining an upstream surface communicating with the inlet and a downstream surface communicating with an axial hollow volume therein, the axial hollow volume communicating with the outlet, a backflushing assembly comprising a backflushing nozzle disposed in each axial hollow volume for backflushing engagement with each of the cylindrical filters at its downstream surface, and a backflush drain communicating with the upstream surface.

Abstract: A system for clarifying liquids, having particular utility in dry cleaning operations. The system includes a filter apparatus which includes a plurality of axially spaced filter elements each having a high pressure side through which unclarified liquid is directed and upon which solids in the unclarified liquid accumulate and a low pressure side in communication with a liquid outlet of the filter apparatus. A liquid agitating impeller is disposed between respective adjacent pairs of the filter elements for defining a predetermined spacing between the filter elements and for creating liquid turbulence and agitation between the filter elements in response to rotation of a common shaft upon which the filter elements and impellers are mounted for effecting substantially complete removal of accumulated solids on the high pressure sides of the filter elements without movement between the impellers and filter elements.

Abstract: In the filtering apparatus for an extrusion machine, a stream of heat-softened plastic material arrives via a flow conduit in a filter housing at an outlet, and thereby permeates replaceable filter means which are carried by a slide which is temporarily slid out of the stream of plastic material. For this, the slide comprises two chambers, forming flow conduit sections and arranged spaced in tandem in the direction of displacement, both of which are closed by filter plates. The slow conduit sections being, at a specified position of the slide in the filter housing internally in flow connection via, in each case, a port, with the outlet conduit in the filter housing and, externally via the filter plates, with the inlet conduit or with a backflow conduit in the filter housing.

Abstract: A multiple element filter system comprising a filter housing defining a water inlet for water to be filtered, a filtered water outlet, a plurality of cylindrical filter elements, each defining upstream and downstream surfaces, disposed in the filter housing such that the upstream surfaces communicate with the water inlet and the downstream surfaces communicate with the filtered water outlet, and a flushing assembly including a movable flushing communication member arranged for selectable flushing communication with the upstream surfaces of each of the plurality of filter elements and apparatus for selectable coupling of the communiation member to a flush drain at atmospheric or relatively low pressure.

Abstract: Filter apparatus where two or more chambers are each provided with an inlet 23, 26, 29, 32, and outlets 25, 28, 31, 34 and means 2, 27, 30, 33, for removing substances retained in the filter. It is desirable that the filter apparatus be suitable for separating liquid components of a mixture of liquids.

Abstract: A cross-flow type filter system includes a filter body divided into an inner primary chamber and an outer secondary chamber by a partition for fixing a plurality of flat filter media in parallel with each other, a rotor located within said primary chamber and adjacent to the surfaces of said filter media. The rotor is rotatable about a shaft extending therethrough and vertical with respect to the surfaces of the media, and allowes a liquid to flow in a direction parallel with the shaft. The system also includes a feed inlet passage provided to the primary chamber at a position adjacent to the shaft, a feed inlet passage located at a position around and adjacent to the media, and a filtrate outlet passage provided to the secondary chamber.

Abstract: A multiple element filter system comprising a filter housing defining a water inlet for water to be filtered, a filtered water outlet, a plurality of cylindrical filter elements, each defining upstream and downstream surfaces, disposed in the filter housing such that the upstream surfaces communicate with the water inlet and the downstream surfaces communicate with the filtered water outlet, and a flushing assembly including a movable flushing communication member arranged for selectable flushing communication with the upstream surfaces of each of the plurality of filter elements and apparatus for selectable coupling of the communication member to a flush drain at atmospheric or relatively low pressure.

Abstract: A backflushable filter including a housing having an inlet coupled to an upstream fluid inlet and an outlet coupled to a downstream fluid outlet, a filter assembly including a plurality of cylindrical filters, defining an upstream surface communication with the inlet and a downstream surface communication with an axial hollow volume therein, the axial hollow volume communicating with the outlet, a backflushing assembly comprising a backflushing nozzle disposed in each axial hollow volume for backflushing engagement with each of the cylindrical filters at its downstream surface, and a backflush drain communicating with the upstream surface.

Abstract: A filter apparatus for removing plankton out of fresh or sea water containing the plankton. The filter apparatus comprises a filter housing provided with a partition plate having a plurality of through-holes thereby to partition the housing into a non-filtrate chamber and a filtrate chamber. A plurality of filter elements, each having open top end, a filter portion and non-filter portion, which are fitted in the through-holes of the partition plate to protrude the open top ends into the filtrate chamber. Plankton in the water are concentrated at the non-filter portion disposed near the partition plate and removed through an opening provided at a portion of the non-filtrate chamber near the partition plate.

Abstract: Polymer filtration apparatus comprising a body having a pair of upstream passages each terminating at a slide channel and a pair of downstream passages respectively opposing the upstream passages, and a slide member in the channel having apertures for a pair of replaceable filters each normally communicating between an upstream passage and a downstream passage. The extents of the channel surfaces between the pairs of passages and between each passage and the exterior of the body, and the extents of the filter apertures on the slide member are related so that one filter remains active when the slide member is in position for replacing the other filter. After a filter has been replaced the new filter may be prefiled without pressure loss in the polymer or excessive leakage thereof.

Abstract: A method and mechanism for the magnetic separation of material from a fluid containing magnetic and non-magnetic material, passing the fluid through matrix containing canisters wherein the canisters are carried on a turret which moves axially and rotatably. In four quadrilaterally arranged locations, two canisters are supported in a separation position within coils until they are filled and then are moved axially and rotationally to cleansing stations while cleansed canisters are rotated and moved axially up into the separation stations. A distribution head connects to the turret for delivery of magnetic material containing fluid and cleansing fluid.

Abstract: Methods and apparatus for separating and removing sand from fluid streams are provided. The apparatus is comprised of a closed separator vessel having first and second compartments therein. An inlet connection is attached to the vessel for introducing the fluid stream into the first compartment and filter means for separating sand from the fluid stream are disposed within the first compartment. The fluid stream is caused to flow from the first compartment through the filter means into the second compartment from where the fluid stream is removed by way of an outlet connection attached to the vessel. Conduit means attached through a wall of the vessel are disposed within the first compartment for conducting and periodically discharging sand wash liquid thereinto.

Abstract: A filter device for a cleaning machine includes a plurality of disk-like filter elements accommodated within a casing and connected to a hollow shaft to be rotatable therewith. Arranged between adjacent filtering elements are stationary disks which extend from the casing inner wall towards the shaft. Each disk is provided at its both sides facing the filtering surface of the filtering elements with at least one rib which extends in radial direction and projects towards the filtering surfaces. These ribs cooperate with projections provided on the filtering elements in such a manner that only a narrow gap is defined when the projections pass the stationary ribs during rotation of the filtering elements. Consequently, the ribs and the projections work like vanes of a turbine and cause strong currents to provide a cleaning effect of the filter fabric.

Abstract: There is provided a filter brush for applying a substantially constant biasing force between adjacent filter elements and including a spring biasing system positioned between adjacent filter brush portions to exert an outward force on the brush bristles in a direction perpendicular to the face of the filter elements to maintain a substantially constant biasing force between the filter brush and an adjacent filter element.

Abstract: A filtering device for filtering solids from liquids or liquid-like materials comprising a housing within which a filter member is rotatably mounted. The filter member which is traversed radially by the material to be filtered, comprises an outer sleeve member, a fine filter sleeve, a support filter sleeve and an inner sleeve member or drum. The outer sleeve member includes bores which receive the material to be filtered and has an external surface which is cylindrical. The filtrate, that is to say, the liquid or liquid-like material, passes through the filter member into the interior of the drum and then travels axially along the drum to a discharge outlet. At least the fine filter sleeve and the support filter sleeve taper conically inwardly in a direction towards the outlet. The solid material remains in the bores.

Abstract: A filter, especially suitable for liquids which are difficult to filter and comprising a closed cylindrical filter container (1) having an inlet (5) for the liquid to be filtered and an outlet (7) for the filtrate and enclosing a filter unit (3) comprising one or more filter elements (13-15) which are mounted substantially concentrically inside the filter container (1). At one end, preferably the bottom end in case of vertically standing containers, the filter container has a bottom cover (2) which can be opened, and the filter element or elements (13-15) are mounted so that they can be extracted from and be retracted to the filter container (1) through said cover (2). The filter unit may comprise several filter elements (13-15) formed as separate units and mounted concentrically inside each other. The filter elements are designed so that an inner filter element over a collar (16-18) carries and is sealed against the adjacent outer filter element.

Abstract: An apparatus for removing a fiber layer from a rotating disc filter consisting of a number of filter discs mounted side by side on a common shaft includes gas or liquid nozzles for said removal. The spray nozzles are rigidly connected to slide shoes, each of which is guided by a guide rail positioned about the periphery of each filter disc. The slide shoe is arranged with play relative to the guide rail and is suspended as a pendulum.

Abstract: An apparatus for filtering solids suspended in a slurry has a housing divided by a horizontal partition into a lower filtrand chamber and an upper filtrate compartment, the partition serving as a vibratile suspension for a multiplicity of filter tubes depending therefrom into the filtrand compartment. An impactor disposed above the housing top has a vertical plunger, coupled with the partition, which is surrounded by or forms a discharge duct with a lower end closely overlying the bottom of a depression formed in the partition; this duct has an outlet opening above the housing top through which effluent present in the filtrate compartment is expelled by the pressure of incoming slurry in a working phase and by the pressure of a scavenger gas such as air in a purging phase.