Abstract: A waste water treatment system and process for treating waste water received in a batch tank. The waste water is discharged in a headwork screen for removing large solids in the water. The solids are into a sludge drying bin. The screened water is transferred into a top of an influent surge tank with an oil/water separator. The oil/water separator includes a plurality of coalescing plates for separating free oil from the waste water. Heavy solids in the surge tank are drained into the sludge drying bin. The waste water is now dropped into a containment pan. From the containment pan, the waste water is pumped into a water treatment tank. The water treatment tank includes two or more electrodes mounted in the top thereof. The electrodes are separated using insulating support spacers for providing proper electrode spacing and insulation between the electrodes. The electrodes are used for providing current to the waste water and separating the contaminates in the water by electrocoagulation.

Abstract: A filter for filtering solid particles from liquids, especially for use in steam condensers and heat exchanger in thermal and nuclear power plants, said filter comprising a housing (4), a screen basket (2) located within said housing (4), a debris discharge pipe (1) for discharging accumulated and captured debris; a debris extractor arm (3) with a curvature towards the screen extending outwards at a predetermined radius with respective vertical plane, the said debris extractor arm (3) being rotatably driven over the entire length of the screen to create a low pressure between the debris extractor arm (3) and the screen (4) for complete extraction of debris and conveying to said debris discharge pipe (1).

Abstract: A system is provided with a solid-liquid separator which can transport sludge and other material for treatment without clogging and can efficiently separator liquid from such material for treatment. The system includes movable plates and fixed plates alternatingly disposed and two screws disposed in holes formed in the movable plates and fixed plates. The screws have blades that partially overlap. As the two screws rotate, the material for treatment is transported and the effluent is discharged through the gaps between the movable plates and fixed plates.

Abstract: A strainer for fibrous suspensions, having a container, a filtering basket inside the container and a rotor inside the filtering basket coupled to motorization means suited to set it rotating. In the container there are a drain chamber of the rejected suspension, a delivery chamber of the filtered suspension, and a collector body arranged in the upper part of the container. The collector body has a lower collector and an upper collector, both with radial longitudinal profile in the shape of a truncated cone and connected to each other in correspondence with the long bases. The lower collector has its short base facing the filtering basket and the upper collector has its short base facing upwards.

Abstract: The invention relates to a screw compressor for compressing matter that passes through the screw compressor. The screw compressor comprises a screw having an outer thread with a pitch that decreases in the longitudinal direction of the screw, and a casing that encases the screw. The casing has an inner side that faces the thread of the screw so that matter may be passed ahead through the screw compressor between the screw and the inner side of the casing in a direction from an inlet end of the screw compressor, where the pitch of the screw thread is greater, to an outlet end of the screw compressor, where the pitch of the screw thread is smaller. Appliances are arranged on the inner side of the casing to prevent matter that passes through the screw compressor from rotating along with the screw. Inside the screw, a conduit is arranged for introduction of liquid. The invention also relates to a method for compressing and dewatering.

Abstract: A debris separating apparatus for use in downspout below an eaves trough comprises a main housing having a water and debris inlet, a water outlet, and a debris outlet. A debris deflector mounted within the main housing between the water and debris inlet and the water outlet is sloped downwardly towards the debris outlet and has a plurality of parallel slots that permit water to pass from the water and debris inlet to the water outlet. A rotatable debris ejecting member has outwardly projecting fingers and water receiving receptacles mounted on the fingers. The debris ejecting member is rotatably mounted within the main housing beneath the debris deflector such that the outwardly projecting fingers project through the slots in the debris deflector and such that the outwardly projecting fingers travel along the slots in the debris deflector as the debris ejecting member rotates, to thereby eject debris accumulated on the top of the debris deflector.

Abstract: The invention relates to a method and a screen for screening two or more pulp mixtures with different roughness. The screen comprises a first screen cylinder and a second screen cylinder. A coarse first pulp mixture is fed into the inlet end of the first screen cylinder, and a second, less coarse pulp mixture is supplied to the second screen cylinder. The pulp mixtures are screened by means of a screen surface of the screen cylinders into accept that passes apertures provided in the screen surface and reject that does not pass the apertures. The accept from the second cylinder is conveyed by means of a guide tube provided between the cylinders towards the inlet end of the first cylinder and it is finally mixed with the first pulp mixture. The accept from the first and the second pulp mixture passes the screen surface of the first screen cylinder.

Abstract: A filter assembly for removing filtrate from industrial process streams. The assembly includes a housing in which a filter element is disposed. The filter element has a surface against which the filtrate is trapped. A cleaning head to which cleaning blades are attached is disposed in the housing and removes the trapped filtrate. An actuator tube extends through the housing. Internal to the actuator tube is a first magnet. Pressurized gas is selectively applied to the ends of the actuator tube to move the first magnet in the tube. A second magnet is attached to the cleaning head. The second magnet is magnetically coupled to the first magnet so the second magnet moves with the first magnet. Thus, the movement of the first magnet is transferred by the second magnet to the clean head so the cleaning blades move against the filter element.

Abstract: A fluid filtering device includes a housing, a driving device, a filter and a scraping device. The housing has a top portion, a wall portion downwardly extending from the periphery of the top portion and an inlet disposed in the top portion to allow the entry of fluid. The driving device is disposed above the top portion. The filter is disposed near the bottom surface of the housing. The filtered fluid and the impurities are discharged through the underside and the outside, respectively, of the filter. The scraping device has a connecting element driven by the driving device, a scraping element disposed below the connecting element and abutting the upper edge the filter and a flexible element disposed between the connecting element and the scraping element and exerting a constant downward force on the scraping element. Therefore, this invention can provide a fluid filtering device that is structurally simple, may be further miniaturized and may be used in various types of places.

Abstract: A screening device which is particularly useful for separating solids from liquids when sewerage systems overflow. The device includes an inner apertured chamber and an internal brush arrangement for sweeping over the apertures to prevent clogging. A spray enables the apertured chamber to be washed after use.

Abstract: A system for transporting and dewatering solids in a fluid system. An auger is used to transport solids and provide first stage compaction. A dewatering plate having a restricted opening provides second stage compaction and dewatering. The auger maybe be shafted or shaftless. First stage compaction is achieved by a change in helical pitch of the auger immediately preceding the location of the dewatering plate.

Abstract: A self-cleaning mechanical filter comprises a mechanism for simultaneously cleaning the internal surface and the external surface of a filter element. The filter is provided with structure for performing suction scanning of solid materials accumulated on the internal surface of the filter element, and structure which can be operated in synchronization with the suction scanning structure for backwashing the external surface of the filter element during a self-cleaning process.

Abstract: A method and system for separating human waste solids from liquid for a shipboard toilet system that allows for the separation of solid waste, compaction of the solid waste and storage of solid waste. Wastes are deposited into a shipboard toilet system that uses vacuum toilets to flush waste into a large, inclined solid waste separation tank. A vacuum pump is attached to the separation tank to maintain negative pressure within the tank and system and to move the separated liquid stream. The separation tank has a separating screen disposed across its entire width to retain solid wastes while allowing liquid to flow through. After separation from liquids, solid waste material is compacted and dewatered with a helical screw through an inclined tube, and packaged for later removal as landfill or burned in the ship incinerator.

Abstract: A drilling water filter (1) with a self-cleaning system including a filter container (2), a cover (3) and a filter element (6) that can be inserted in the flow arm between an inlet (4) and an outlet (5) for separation of solid material from the fluid. The cover (3) has a displaceable carrying handle (7) for transporting the drilling water filter. The carrying handle (7) is connected with at least one self-cleaning means, in a controlled manner.

Abstract: A press for the dehumidification of humid matter, in particular of residual waste is disclosed, which comprises a worm gear whereby the residual waste may be compressed mechanically. During transport with the aid of the worm gear, the humid matter is subjected to a drying medium, preferably pressurized air or a vacuum, whereby it is delivered from the press.

Abstract: The filter has a framework with an inlet end, a solids outlet end and an outlet for a separated product between the ends. A fabric filter extends in the framework from end to end and is supported by movable rings, resilient members and dampers enabling axial extension and contraction of the filter. The resilient members, rings and dampers form a unit removable from the framework. A propeller turbine extends through the filter and is supported at opposite ends, and a drive is coupled with the turbine at the one end of the framework. A quick assembly/disassembly mechanism with a rail extends along the framework and is engageable with its cap for removing same and affording access to the unit enabling withdrawal of the unit from said framework and reinsertion of a filter unit composed of a filter and respective movable rings, resilient members and dampers.

Abstract: Apparatus for the screening of fiber suspensions is disclosed including a housing, a reject outlet and an accept outlet, a screen located within the housing, a rotor including pulsation wings mounted therein, a reject chamber in the housing for collecting a reject portion of the fiber suspension, and an accept chamber for collecting the accept portion of the fiber suspension passing through the screen and supplying it to the accept outlet, each of the pulsation wings including an outside face and an inside face, a leading edge, a trailing edge, and upper and lower ends so that a predetermined pressure difference is created between the outside and inside faces of the pulsation wings in the direction of the lower edge thereof.

Abstract: The present invention relates to an apparatus and method for withdrawing and dewatering slag from a gasification system. In particular, the present invention relates to a conveying lockhopper and method of using the conveying lockhopper to collect slag and other waste byproducts from the gasifier of a gasification system. The conveying lockhopper is configured to receive slag from a gasifier, simultaneously extract and dewater the slag, and expel the processed slag directly into an awaiting container suitable for carrying the processed slag away. The conveying lockhopper generally comprises a housing with inlet and outlet valves to receive and expel slag, respectively. The housing is inclined at an angle typically between 5 and 60 degrees to the horizontal so that the outlet is at a higher elevation than the inlet. Inside the housing, an auger or similar conveying mechanism conveys the slag from the inlet towards the outlet while simultaneously dewatering the slag.

Abstract: A fiber mat is formed on a screen cylinder of a pressurized fiber filtering device used to filter particles from a liquid stream. The fiber mat is a fine particle filter to remove small particles from the liquid stream. The fiber mat is formed by injecting cellulosic fibers into the liquid stream flowing into the fiber filtering device. These fibers collect on the screen cylinder as the liquid flows through the cylinder. The collection of fibers forms the fine filtering mat.

Abstract: In a screw press, an outer tube (5), over which a screen (4) is tensioned, is divided into a freely rotatable condensing zone at the front half thereof, and a filtering and dewatering zone at the rear half thereof, a freely rotatable screw shaft (7) is provided within the thus-divided outer tube (5a, 5b), filtered fluid is separated from sludge supplied to the starting end of the condensing zone by the screen (4) of the outer tube (5a), and a cake is removed at a discharge port (29) at the rear end of the outer tube (5b) of the filtering and dewatering zone. A sludge supply path (28) is provided in the screw shaft (7), a supply hole (28a) of this supply path (28) is formed at the starting end of the outer tube (5a) of the condensing zone, and a scraper (33) extends on the outer periphery of a screw vane (6) from the starting end to the ending end.

Abstract: A backflushable filtering apparatus for fuel or luboil filter of a motor includes inlet and outlet flow channels, parallel filtering elements open from their ends, in which infiltration occurs from through their jackets, and washing organs at different ends of the filtering elements, the organs connecting alternately to different ends of the filtering elements to provide discharge channels for the backflushing of elements generated by the pressure of the filtered flow. Each of the filtering elements is divided in two by a solid partition or constriction between its ends so that the connected washing organ generates backflushing only to a part of the element length at a time. The parts of the filtering element are functionally independent, and the one part may be backflushed at the same time as the filtering goes on in the other part.

Abstract: A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension includes a housing and a rotor within the housing. The rotor has a top end. A screen basket is positioned generally concentrically around the rotor. A rotor blade ring is connected to the top end of the rotor and rotates with the rotor. A stationary defibering ring is positioned adjacent to the rotor blade ring.

Abstract: A screening basket is disclosed which is intended to be located in a screening device for separating a fibrous suspension. The screening basket is tubular with a diameter and an effective screening height. In order to reduce problems with thickening and wear, the diameter is at least 1.8 times greater than the effective screening height.

Abstract: The invention relates to a silo for sludge, especially sewage sludge, comprising a sludge-receiving part (12), a feeding part (16), said feeding part being located above the sludge-receiving part (12) and communicating with said sludge-receiving part (12) via a inlet (14), and a sludge-discharge device. Said sludge-discharge device is located in the lower area of the sludge-receiving part, and can preferably be connected to a pipeline system. According to the invention, a separator device (18) for removing foreign bodies is located in the area of the feeding part (16) so that the sludge which is temporarily stored in the silo can easily be used later on. Said separating device for removing foreign bodies (18) has a sieve grate (20) covering the inlet (14) and at least one counter-surface (22) positioned above said sieve-grate (20). Said sieve-grate and said counter-surface are able to move in relation to each other as sludge pushes through the sieve openings of said sieve-grate.

Abstract: A food waste disposal system having a separator for separating food waste solids from liquids. The separator includes a housing having a screw conveyor surrounded by a screen. The solids are introduced into the screen and conveyed by the screw conveyor toward the opposite end. The solids are compacted by the conveyor against a spring loaded member that adjustably blocks passage of the waste to an exit chute.

Abstract: The invention relates to the formation of an article which is wholly formed with a thread formation or includes a portion which is threaded. The threaded portion is formed by winding a wire in a helical path around a series of spaced support members. The wire forms the thread and also forms a slot in a helical path between adjacent portions of the wound wire. A suitable threaded member can then be introduced to the article and selective rotation causes relative movement of the threaded member along the threaded portion. The article can be used as a filter medium, a securing means and the like and the wire used is typically triangular in cross section and known as wedge wire.

Abstract: Apparatus for the screening of fiber suspensions is disclosed including a housing, a reject outlet and an accept outlet, a screen located within the housing, a rotor including pulsation wings mounted therein, a reject chamber in the housing for collecting a reject portion of the fiber suspension, and an accept chamber for collecting the accept portion of the fiber suspension passing through the screen and supplying it to the accept outlet, each of the pulsation wings including an outside face and an inside face, a leading edge, a trailing edge, and upper and lower ends so that a predetermined pressure difference is created between the outside and inside faces of the pulsation wings in the direction of the lower edge thereof.

Abstract: A device is described for mechanically cleaning fluids, especially for [cleaning] the cooling water that enters a heat exchanger, having a pipe segment (12) as housing, a sieve element (20) that essentially covers the cross section of the pipe, and a suction device (20) on influx side (22) that is capable of moving around an axle (18), the purpose of the device being to aspirate the surface area of sieve element (16) and in this manner clean it, wherein, according to the invention, sieve element (16) forms a partially cylindrical casing having a cylindrical axle (56) perpendicular to axle (24) of pipe segment (12), wherein the open part of cylindrical casing (16) is arranged toward influx side (22) (FIGS. 1, 2).

Abstract: A filtering device includes a container having an inlet for introducing liquid to be treated, an annular multi-layered prepacked screen assembly provided in the container and having an outlet for treated liquid. The screen assembly includes three or more cylindrical screens having different diameters and being coexially disposed in the container with their axes extending vertically in the container. An annulus is formed between the respective cylindrical screens. Two or more different filter materials performing different filtering functions are filled one in each of the annuluses between the cylindrical screens.

Abstract: A mechanism and method for separating solids from a slurry includes a screen, and an extractor screw connected to the screen outlet by means of a flexible conduit, wherein the outlet of the extractor screw is at a higher elevation than the outlet of the screen.

Abstract: The present invention provides a flow disrupter within the flow path of a slurry comprising a desired particulate matter and a transport fluid so as to impart a force angularly disposed to an otherwise obtained direction of travel, thereby preventing the formation of a sheet of aggregated particulates against the screen surface. In a method in accord with the present invention a force is imparted to the desired particulate matter in an angular direction to the direction of travel.

Abstract: A device for separating liquid from waste produced by milling or cutting operations, and particularly from waste arising during the milling of plastics surfaces, comprises a housing for taking up the liquid separated from the waste and a screening device communicating with this housing. The liquid containing the waste is introduced through a means for introduction into the screening device. Means for a continuous recovery of the waste are associated with the screening device, where the waste is continuously conveyed toward a recovery means associated with the screening device. The screening device and, where applicable, the housing are of cylindrical shape. The means for continuous recovery are provided as eccentrically mounted rotary-slide arrangement.

Abstract: Process for manufacturing screens and screens suitable for use in wet screening fibrous paper suspensions, in which the screens include at least one screen plate having a number of sorting apertures. The process includes providing a number of fastening openings in the at least one screen plate, and inserting profiled pieces into the fastening openings. At least a portion of the profiled pieces are arranged to project beyond a screen surface.

Abstract: Pressurized screen to remove contaminants from a contaminant-containing fibrous paper suspension. Pressurized screen includes a housing, a first screen element, essentially axially symmetric and rotatably mounted within housing, and a second screen element, which is essentially axially symmetric. First and second screen elements are successively arranged in suspension flow direction. At least one intake, coupled to housing, supplies suspension to housing, and at least one accepts outlet, coupled to housing, conveys a part of suspension that passes through the second screen element out of housing. At least one coarse reject outlet is located within housing to remove a part of suspension not passing through first screen element, and at least one fine reject outlet is located within housing to remove a part of suspension not passing through second screen element. First screen element includes conical shape with opening angle (&agr;) between about 10° and 170°.

Abstract: The present invention provides a concentration type aggregation reaction apparatus having a concentration screen, which enables an aggregation reaction to be conducted in sludge and the sludge to be concentrated by separation of a liquid by means of a single apparatus. The concentration screen is in a cylindrical form and includes slits having horizontal openings. A decelerating device is connected to an upper portion of a shaft for an agitator for agitation in the tank and brushes are connected to the decelerating device. The brushes are adapted to revolve along opposite surfaces (on a primary side and a secondary side) of the screen. By use of these brushes, aggregates adhered to the screen are continuously removed.

Abstract: A screen device for separating fiber suspensions comprises a screen (40) defining a central chamber (36), and a rotor (15) in the central chamber having a first (21) and a second (27) rotor portion, respectively, provided with first (43) and second (41) pulsation elements, respectively, for pulsating the suspension close to the screen along a first (11) an a second (9) axial screen portion, respectively, of the screen. The first rotor portion (21) and the first axial screen portion (11) define a first screen chamber (39) and the second rotor portion (27) and the second axial screen portion (9) define a second screen chamber (37). Distribution means (22, 28) are provided for dividing the incoming fiber suspension into two part streams having the same axial directions in relation to the rotor and for distributing the two part streams to the first and second screen chambers (39, 37), respectively.

Abstract: The apparatus according to the invention for filtering contaminated liquids, such as cooling and/or lubricating liquids which are employed during the machining of workpieces with metal removal for example, has a liquid container (11) with an inlet (13) for contaminated liquid and an outflow (15) for filtered liquid, and a filtering insert which can be connected to the outflow is disposed in the container.

Abstract: Cylindrical screen, particularly for paper pulp, of the type comprising at least one filtering element (10) positioned between two flanges (1, 2) by means of a number of bars (3). The filtering element is composed by wires (10) placed side by side and held by rings (11). This filtering element is rigid in the axial direction and is placed upstream from the above mentioned bars (3), in relation to the direction of flow of the pulp. The filtering element is held against the bars (3) through the rings (11) that are in contact with the bars without being attached to them, so as to maintain its shape by withstanding the pressure exerted by the pulp.

Abstract: A filter having filter elements with outwardly flanged ends sealed together. The seal may be secured by use of a rod extending in a lengthwise direction through apertures in the flanged ends. The rod has one end releasably securing the filter element and a second end secured to the housing. A frame can cover the filter elements, and a jack screw in the frame can be used to apply force to the filter elements to secure the seals. The filter may have a cleaning apparatus capable of suctioning material from the filter element.

Abstract: A screen, for screening material used in the production of paper, board and the like, having a screen basket and a rotor supporting several blades which can be moved along the wall of the screen basket when the rotor rotates. The blades having a convex curvature on the side facing the screen basket. The radial clearance between the surface of the blade facing the screen and the screen being lowest between the front sector, viewed in the direction of rotation, and increasing towards the rear edge of the blade.

Abstract: A pressure screening apparatus for screening a stock suspension and screen clearer for a pressure screening apparatus.

Abstract: A deep bed liquid treatment apparatus and process in which the liquid and a granular media is periodically agitated to create a liquid-media slurry, and outflow of the liquid and entrained contaminants is induced through a separator having an inner diameter screen with openings sufficiently small to prevent the escape of media granules. A rotor is rotated within the separator to create turbulent flow at the screen to dislodge the granules drawn onto the screen openings.

Abstract: A screen for cleaning a pulp suspension including an additional screen basket in the infeed area for pre-screening.

Abstract: The present invention is a pulp screening device which is capable of screening a large quantity of pulp with low power, by preventing clogging of a screen cylinder. The device is provided with one or a plurality of vanes which revolve within an agitation chamber formed between a pair of inner and outer screen cylinders, holding a predetermined small space from each of the inner and outer screen cylinders. The agitation chamber is practically partitioned in the circumferential direction by the vanes.

Abstract: A waste disposal system separates human wastes into solid and liquid parts for subsequent treatment such as microbial decomposition treatment and/or activated sludge treatment. The system includes an outer box. A cylindrical member made of a water-permeable material is received in the outer box. A top plate closes the top openings of the outer box and the cylindrical member. The latter has an open bottom. A helical rotary brush is mounted on a vertical rotary shaft extending through the top plate into the cylindrical member so as to be coaxially received in the cylindrical member. The top plate is formed with a port through which waste is adapted to be introduced into the cylindrical member. A closure member closes the bottom opening of the space defined between the outer box and the cylindrical member and is formed with a discharge port.

Abstract: A pulper for pulping a fiber suspension includes a vessel, an extraction plate assembly and a rotor. The extraction plate assembly is disposed within the vessel and includes a metal plate with a plurality of holes extending therethrough. A plurality of metal inserts are respectively disposed within the holes and project from the plate. Each insert is removably attached to the plate. A rotor is disposed within the vessel adjacent to the extraction plate assembly. The inserts are removably attached to the plate by brazing the inserts within the holes, or slightly shrinking the inserts using liquid nitrogen and placing the inserts in the holes.

Abstract: Apparatus is disclosed for screening fiber suspensions including a housing, an annular screen disposed within the housing, a rotor disposed within the annular screen for rotating relative to the annular screen, pulsation wings disposed between the outer surface of the rotor and the annular screen for relative rotation with the rotor, an inlet for the fiber suspension to feed the fiber suspension to one end of the screening zone, an accept outlet for a portion of the fiber suspension which passes through the annular screen, a reject outlet for a portion of the fiber suspension which does not pass through the annular screen, and a dilution liquid nozzle for supplying a dilution liquid to the screening zone between the rotor and the annular screen, the dilution liquid nozzle disposed proximate to the reject outlet and directing the dilution liquid into the screening zone along the outer surface of the rotor.

Abstract: A filtering device includes a cylindrical screen 2 having a rotatable backwash tube 3 provided coaxially therein. The backwash tube includes a first end portion including an inlet 3c for introducing filtered liquid and a second end portion including an opening 3d for discharging filtered liquid and introducing backwash water. A plurality of backwash water injection holes 13d are formed along the backwash tube in an axial direction thereof at a predetermined interval. A check valve 14 is disposed within the backwash tube adjacent the inlet 3c such that in a filtration operation filtered liquid is allowed to flow from the inlet 3c into the backwash tube 3 and then into the liquid transfer tube 9. In a backwash operation, the check valve prohibits backwash water from flowing to the inlet from the backwash tube.

Abstract: A filter unit for filtering pressurized liquid carrying solid contaminants, comprising a housing having a cavity, an unfiltered liquid inlet port, and a filtered liquid outlet port. The filter unit also has a filter element having a generally cylindrical shape positioned within the housing, an interior, and a porous filter sleeve having an exterior face, the interior of said filter element in fluid communication with the filtered liquid outlet port and the exterior face of the sleeve of said filter element in fluid communication with the unfiltered liquid, so that, in operation, unfiltered liquid carrying solid contaminants flows into the cavity of the housing through the unfiltered liquid inlet port, the filter element filters the solid contaminants from the liquid, and the filtered liquid passes through the sleeve of the filter element to the interior thereof before exiting the filter unit via the filtered liquid outlet port.

Abstract: Cylindrical screen, particularly for paper pulp, of the type comprising at least one filtering element (10) positioned between two flanges (1, 2) by means of a number of bars (3). The filtering element is composed by wires (10) placed side by side and held by rings (11). This filtering element is rigid in the axial direction and is placed upstream from the above mentioned bars (3), in relation to the direction of flow of the pulp. The filtering element is held against the bars (3) through the rings (11) that are in contact with the bars without being attached to them, so as to maintain its shape by withstanding the pressure exerted by the pulp.