Abstract: An assembly for separating solid phase material from a slurry that comprises a pressurized filtration unit including a vessel and filter media. A slurry is fed to the filtration unit where it is separated into a solid phase material and a liquid phase material. The filtration unit has a solid outlet for discharging the solid phase material to a material transport. The material transport moves the solid phase material to a depressurizing chamber that has a lower pressure than the filtration unit. As the solid phase material enters the depressurizing chamber it is exposed to the lower pressure of that chamber. The material transport maintains the pressure difference between the filtration unit and the chamber. Subsequently, the depressurized solid phase material can be conveyed to other equipment for drying or other processing.

Abstract: The arrangement is for washing and dewatering a fiber pulp suspension. The arrangement comprises two hollow, circular-cylindrical screen members that have evacuation chambers arranged inside the screen members for leading off liquid. The screen members rotate counter to each other to form a nip. At least one of the screen members is arranged in a trough that partially encloses the jacket of the screen member and, in the direction of rotation of the screen member, converges towards the jacket of the screen member. A sealing arrangement for a pulp head box distributes the pulp onto the jacket surface of the screen members. By forming a progressively decreasing gap B-A at the pulp head box counter to the rotation of the screen member, a simple self-sealing of the pulp suspension can be obtained which allows fiber residues to be returned to the dewatering zone.

Abstract: The invention relates to a device for filtering liquids, comprising two shafts (11) which are parallel to each other or at an acute angle to each other. Each shaft (1) carries a stack of discs (2) which extend perpendicularly to the shaft axis and which are connected to the shaft (2) in a rotationally fixed manner. The discs (2) of one disc stack are engaged in the intermediate spaces between the discs of an adjacent discs stack. At least one of the shafts (1) is drivable and at least one of the shafts is hollow and is provided with bores (1-2). Some of the discs have channels (2-4) inside them which are conductively connected to the inside of their hollow shaft (1). A ring-shaped distancing element (3) is located between each pair of adjacent discs (2) of a shaft.

Abstract: A device for separating one or more components from a fluid, such as gas, water, oil and so on, which device is provided with a closed drum-shaped first carrier which is rotatable driven on a shaft and has means for feeding respectively discharging the fluid, wherein a second carrier is arranged coaxially in the first carrier, on which second carrier are arranged a large number of flexible elements which extend radially from the second carrier as far as the first carrier, and the feed means are provided close to the one end of the second carrier and the discharge means close to the other end of the second carrier, so that when the fluid flows through the device a layered separation of the components results along a flexible element.

Abstract: A method for withdrawing and filtering a partial volume of a particle-containing process fluid enclosed in a container, a combination of a container enclosing a process fluid and an assembly for continuously withdrawing and filtering a partial volume of a process fluid and a cross-flow filtering device are disclosed. The method, the assembly and the filtering device can be used in connection with biological process systems, in which the removal of sand, sludge, fibers and alike from partial volumes of the process fluid is necessary before additional filtration and subsequent sample analysis.

Abstract: The invention refers to a filter 1 with several rotating filter discs 3 mounted on a shaft 2 and which are provided with a porous filter medium. It is characterised by elastomer elements (8, 8′) being mounted on the shaft (2) as spacers between the individual filter discs (3). In addition, the invention refers to a filter disc 3 for a filter 1 of this kind.

Abstract: The replaceable wearing surface is for a sealing arrangement on drum end walls on a press drum that de-waters fiber suspensions radially into the drum through the shell of the drum. The wearing surface of the sealing arrangement has a wear ring and holder members. The wear ring is, on a side that faces into the drum from the drum end-wall, provided with locking members. The locking members are arranged parallel to the drum axis and are preferably in the form of knob-shaped locking members. The arms of the holder members are designed to engage the locking members. The holder members are fastened to the drum end wall by suitable fixing members.

Abstract: A screening device includes a screening element connected to a reinforcing element by a frictionally engaging clamping connection. Spacers located between the screening element and the reinforcing element provide a radial clearance therebetween. The screening element can be replaced when worn out, while the reinforcing element and associated parts can be reused with a new screening device. For this purpose, the screening element can be detached from the reinforcing element, which provides the actual support function, as a single unit by way of the frictionally engaging clamping connection. The clamping connection can be implemented by way of wedges or a conical seat.

Abstract: An improved coolant cleaning method, system, and apparatus, are provided through the use of a filter disk assembly that defines and is rotatable about an axis of rotation of the disk, for removing particulate matter from a fluid flowing through the filter disk assembly in a direction substantially parallel to the axis of rotation of the filter disk assembly. A coolant cleaning system includes such a filter disk assembly, connected in fluid communication with an apparatus for circulating a flow of fluid through the filter disk assembly in a direction substantially parallel to the axis of rotation of the filter disk assembly.

Abstract: A solid-liquid separating apparatus including a strainer of a cylindrical shape. The strainer is comprised of circular ring members arranged side by side with gaps in between and disposed inside an accommodating section the device casing. The circular ring members comprise end-part circular ring members at both ends of the strainer and a plurality of intermediate circular ring members disposed between the end-part circular ring members and have inward projections projecting from their inner circumferential surfaces. A plurality of lateral bridge members are installed between the end-part circular ring members, and these bridge members have engaging parts that engage with the respective inward projections of the intermediate circular ring members so as to hold the intermediate circular ring members.

Abstract: Process and decker for bringing together a first aqueous pulp suspension layer with at least one additional suspension layer. The process includes moving the first pulp suspension layer and the at least one additional suspension layer on moving layer supports, and guiding sides of the first pulp suspension layer and the at least one additional suspension layer that are adapted to contact each other on guiding surfaces that are one of stationary and limitedly moving. The guide surfaces include contoured surfaces arranged to run substantially parallel to the layer supports. The process further includes applying the at least one additional suspension layer onto the first pulp suspension layer at a wedge-shaped gap, and draining the first pulp suspension layer and the at least one additional suspension layer. The decker includes at least one rotating cylinder, and an endless wire guided around at least a portion of an outer circumference of the at least one rotating cylinder.

Abstract: Apparatus for pressing liquid from a liquid containing material is disclosed including a pair of juxtaposed rotary rolls forming a nip, at least one of the rolls being liquid permeable, that roll including an abduction surface extending laterally across the roll so that a portion of the liquid stream pressed out form the liquid containing material passing through the nip runs along the abduction surface, a liquid collector for collecting that portion of pressed out liquid extending laterally across the roll and including a liquid inlet for the pressed out liquid stream, and a return flow protector for preventing the pressed out liquid stream from rewetting the reduced liquid material formed in the nip.

Abstract: A fluid filter which comprises a canister having an open end and a closed end, the canister sealing to an adapter body to prevent leakage between the canister and the adapter body, the adapter body having a plurality of fluid inlet ports extending through the adapter assembly body into the cavity formed by the canister and the adapter body assembly, a threaded fluid outlet port extending through the adapter body, a threaded ring adapter for adapting the outlet port to a variety of connection configurations, a multistage wire mesh filter element having a weave which is designed to prevent fluid contaminants from passing through the filter element while inhibiting the contaminant particles from becoming lodged in the filter mesh, the fluid inlet ports in the adapter body being formed at an angle to create a tornado type turbine fluid motion within the canister to suspend contaminants which are blocked from passage through the screen in the fluid and allow such contaminants to settle in the canister out of the f

Abstract: A screen, such as a drum screen or a flat screen, for screening or fractionizing pulp suspensions or the like suspensions of the pulp and paper industry. The screen comprises a reinforcement attached to the surface of the screen plate, such as a reinforcing ring (16, 18) attached to the surface of a drum screen (10). The reinforcement (17) is made of fiber-reinforced composite material. The invention also relates to a method of manufacturing the reinforcement of a screen plate of composite material. The composite material is preferably made of reinforcing fiber and plastic matrix material.

Abstract: The present invention provides a filtering apparatus generally comprising a reservoir containing a pool of dirty fluid, the reservoir defined at least in part by a pair of laterally spaced side walls. A drum is rotatably supported within the reservoir, the drum having a generally cylindrical body having a first end, a second end, and an opening therebetween to pass fluid. A filter element is connected to the drum body and covers the opening to filter fluid flowing into the drum. The drum body is journalled about its outer surface to the reservoir for rotation therein. As such, the drum does not require any end walls to support the drum, and the entire end of the drum is wide open to the flow of fluid, which increases the rate of flow through the filter, and permits the filter to be used with a wide range of fluid flows. Unique adjustment of the drum is also provided.

Abstract: A process for recovering crystals from a slurry which comprises supplying a slurry comprising crystals and a solvent to a rotary vacuum filter and successively conducting filtration under suction, washing, filtration under suction and cleavage of a cake continuously by rotation of a cylindrical filter medium, wherein a vapor having a same composition as that of the solvent is supplied as a blowing gas for cleaving the cake. The crystals can be continuously recovered for a long period of time without clogging of a filter medium when the crystals are recovered from a slurry by using a rotary vacuum filter.

Abstract: Method and arrangement for filtering particles out of a liquid, in which the liquid containing particles is supplied to a sedimentation tank (12), and the liquid is made, by means of hydrostatic liquid pressure prevailing in the tank, to flow through a filter member (18) on the shell surface of a drum (14) mounted in the tank (12). When the liquid in the tank has risen to a predetermined level above the drum (14) as a result of clogging of the filter member (18), cleaning of the filter member (18) in situ in the tank is initiated.

Abstract: A pulp screening assembly where each support ring is weldlessly bonded to a perforate screen section by a bonding material that preferably is a brazing material. There is a joint between each ring and a screen section in which brazing material is disposed. The joint includes at least one set of mating faying surfaces that are offset relative to a longitudinal axis of the screening assembly. In a preferred embodiment, there is a tolerance between mated faying surfaces of no greater than 0.008 inches to ensure a good weldless bond is achieved. In another preferred embodiment, the tolerance is no greater than 0.004 inches. A weldless screen basket is produced having end rings, a plurality of slotted screen sections, and an intermediate ring having slots with back grooves within four millimeters of a ring at each end increasing screening open area.

Abstract: A disc-type filtration apparatus including at least one filter element and a shower system configured to wash media portions on sides the at least one filter element as the filter element moves rotationally downward toward and into a slurry reservoir and subsequent to scraping of filter cake therefrom. The shower system may be fixed and extend across the sides of the filter element or, alternatively, the shower system may include a movable head which is caused to traverse radially across the sides of the filter element. The shower system may be operated on a discontinuous or periodic basis or, optionally, on a continuous basis. Methods of operation of a filtration apparatus are also disclosed.

Abstract: Water to be treated is passed through a membrane (net), magnetic floc positioned in a portion below a level of the water to be treated is deposited to a surface of the membrane, and the surface of the membrane with the magnetic floc deposited is moved to an atmospheric portion above the level of the water to be treated. In the atmospheric portion, excess water from the magnetic floc flows downward due to gravity to concentrate the magnetic floc. A permanent magnet is located near a position to which the membrane surface with the magnetic floc deposited thereon moves. There are further provided between the magnet and the membrane surface a moving body (shell) formed by a non-magnetic material, a spatula for scraping the magnetic floc from the moving body, and a sludge vessel in which a released magnetic floc is recovered.

Abstract: A pulp screen cylinder that includes screen media releasably engaged with a frame at spaced locations opposing movement of the media away from the frame during screening. A preferred frame includes a plurality of spaced engaging structures that releasably engage screen media. A preferred frame includes an arrangement of flow windows that are triangular or rhomboid. A preferred method includes producing a frame cylinder by centrifugal casting and machining flow windows using a jet cutting process. A preferred screen media has a plurality of spaced apart engaging structures that each releasably engages the frame at spaced apart locations. A preferred screen media is of wedgewire construction having engaging structure carried by a plurality of spaced wire retaining clips. A preferred clip has vee-shaped rounded slots and an arm thicker than an end wall. A preferred engaging structure includes a projection that has a lip or hook for releasable interlocking engagement.

Abstract: Apparatus is disclosed for dewatering aqueous suspensions including a pair of rotatable rolls forming a nip therebetween, so that the aqueous suspension can pass downwardly through the nip and be dewatered by removing a filtrate from the suspension, and the dewatered suspension can pass downwardly from the nip, at least one of the rolls being liquid permeable, and at least one screen adjacent to the roll and disposed below the nip, the screen is separated from the roll by a predetermined distance and extends along its length, the predetermined distance being a sufficient distance so that a film of filtrate on the roll passes between the roll and upper end of the screen on one side of the screen and the dewatered suspension passes on the other side of the screen so that the filtrate is prevented from contacting the dewatered suspension below the nip.

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: An improved hood enclosure for isolating wood pulp washing equipment from the ambient environment. The hood has a pair of end members, a pair of skirts along each side to connect to the end member together, and an upper spine also connected at each end to the end members. A pair of clamshell style doors are mounted to the spine along longitudinal hinge lines and are opened vertically. A plurality of access doors are positioned within the skirts, and a plurality of spray or shower pipes penetrate the hood through an end panel to deliver wash liquid to the internal wash drums positioned within the wash vat. Several sealing methods are incorporated to provide sealable access for the access doors, the clamshell doors, and access to the interior of the washing vat for the shower pipes. The clamshell doors abut a peripheral neoprene sealing gasket and are held against the gasket by their own weight.

Abstract: Apparatus and a method are presented for the mechanical removal of moisture from a filter cake. Differential pressure causes the flow of a treatment fluid through the filter cake. The treatment fluid displaces liquid originally present in the filter cake to prevent cracking of the filter cake.

Abstract: An apparatus for filtering plasticized thermoplastic synthetic plastic material is provided. The apparatus provides increased transport of thickened material toward the discharge channel. The apparatus includes at least one filter element having an inflow side that is brushed over by scrapers to guide waste residues along the surface of the filter element to the discharge channel. A non-perforated zone facing the scrapers includes grooves. The non-perforated zone is also brushed over by the scrapers.

Abstract: A vacuum filter includes a cylindrical filter drum 12 having both a perforate section 14 and an imperforate section 16. The drum is positioned in a tank 20 so that the imperforate section is oriented upwardly therein. A level controller is provided to maintain the level of contaminated fluid below the top of the imperforate section but above the perforate section. A filter belt 54 wrapped around the filter drum is repositioned by rotating the drum when the differential pressure between the interior and exterior of the drum reaches a predetermined value. The inlet ends 35 of the suction pipes 34 are continuously positioned at the lowest point of the drum so that the pump does not lose suction when the drum is rotated thereby facilitating continuous filtration of the contaminated fluid through the vacuum filter.

Abstract: A process for recovering crystals from a slurry which comprises supplying a slurry comprising crystals and a solvent to a rotary vacuum filter and successively conducting filtration under suction, washing, filtration under suction and cleavage of a cake continuously by rotation of a cylindrical filter medium, wherein a vapor having a same composition as that of the solvent is supplied as a blowing gas for cleaving the cake.

Abstract: A disposable rotary drum filter for processing batches of slurry. The device includes an outer housing in which is disposed a rotatable inner drum that is covered with a filter material. Preferably the device is fabricated from a plastic material that is sterilizable. The inner drum is preferably magnetically coupled to an external drive unit, eliminating seals required if it were necessary for a drive shaft to pass through the housing. The inner drum rotates through a slurry. The filtrate outlet is connected to a vacuum source that draws the slurry through the filter material. Solids in the slurry are thus deposited as a filter cake on the outer surface of the filter material, while liquid from the slurry passes through the filter material to be collected as a filtrate. Air drawn into the housing through an inlet passes through the filter material and partially dries the filter cake that has been rotated out of the slurry.

Abstract: An apparatus for collecting oil from a surface of a water body comprising a drum, the drum rotatably mounted on a vessel such that a lower portion of the drum is positioned below a waterline of the vessel, and a wiper member on the vessel, the wiper member positioned and configured to wipe oil from the drum below the surface of the water body. Wiped oil is collected below the surface of the water body through a series of collection tanks. A dryer wiper wipes water from an unsubmerged portion of the drum to improve oil uptake.

Abstract: The present invention relates to a rotating device for continuously filtering a liquid such as a solution containing a precipitate.

Abstract: The present invention is a screening/washing/dewatering system which utilizes a solids handling pump to vacuum solids captured from a contaminated fluid stream from the system's screening mechanism and to convey them, in a concentrated form and through a closed conduit, to the washing/dewatering mechanism. The use of a solids handling pump enables a screening, washing and dewatering system to contain the captured solids in a completely closed system from their point of capture, through a conveyance system of unlimited length and configuration, to the point that the washed, dewatered screenings are finally discharged. Secondarily, the present invention offers the advantages of being able to capture as small of a solids particle size as is desirable and of providing effective washing and dewatering of the captured particles while minimizing the number of moving parts and maximizing the overall system reliability.

Abstract: A chip treatment device 100 includes a box-shaped housing 110, and an upper surface panel 112 of the housing is connected to a sloped portion 114. The interiors of the housing 110 is divided into upper and lower areas by a partition panel 130, and to the areas are provided a first cutting fluid bath 150 and a second cutting fluid bath 160. Chains 240 stretched between driving sprockets 210 and chain guide units 230 are equipped with scraper units 250 moving in the direction of the arrow. The chips coming in from an entrance opening 180 is separated from cutting fluid while being conveyed on the separation panel 130. First and second filter units 170, 300 filter said cutting fluid.

Abstract: A screen plate (1) for screening of pulp suspensions, comprises a number of elongated at least partially curved screen slots (3). According to the invention every screen slot has a width which is maximally 0.8 mm, and the screen slots bend in such a way that a straight rod, which has a breadth which is less than the width of the screen slot and the length which is 5 mm, is prevented from passing through the screen slot, when the rod extends along the screen plate, independently of how this rod is oriented in relation to the screen slot. At that elongated stiff shives may be separated more efficiently by means of the screen plate. This screen plate may also be used for separating a pulp suspension into a first fraction comprising comparatively stiff fibers and a second fraction comprising comparatively flexible fibers.

Abstract: A screening device useful in water and waste water treatment plants separates fluid flow into two streams. The screening device is perforated so that solids having a predetermined cross-section will be maintained within a first fluid stream, and a portion of the fluid flow that has been screened of solids will flow into a second split-off fluid flow. The streams may go to different locations; only the first stream need be processed for the solids. The screening device is preferably cylindrical or another surface of rotation or a section of such a surface, and rotates. These features help maintain the screening device free of solids, and supplemental cleaning devices may also be used.

Abstract: A rotating brush, mounted on either the outside or the inside of a rotary intake drum, to brush debris from the surface of the drum. The debris is collected in a holding bin located under the brush. The system uses a collector to remove debris from the holding bin when it is filled. In this way, debris is removed completely from the intake, rather than merely brushing it from the drum into the water flow, where it is immediately sucked onto the drum again. The brush rotates the drum as it turns on the surface. This action flicks the debris from the drum into the holding bin. This action automatically removes debris as the drum is working. Other features of the device include a framework for placing and operating the drum and the collection system.

Abstract: The invention relates to a filter assembly for producing a paste-like filter cake and a substantially solids free filtrate or permeate. The filter assembly includes a substantially cylindrical member having an exterior foraminous surface, the cylindrical member being mounted on an elongate shaft for rotating the surface about an axis defined by the shaft. The exterior foraminous surface is covered by a microporous filter media. A stationary housing is positioned adjacent a portion of the exterior surface of the cylindrical member. The stationary housing includes a filter feed inlet and a sealing device and is spaced from the exterior surface a distance sufficient to enable cross flow relative to the filter media. Unique filter seal members promote retention of fluid to be filtered in a filtration area defined by the housing and cylindrical member. As the cylindrical member is rotated about the axis, a cake removal or membrane cleaning device removes filter cake from the filter media.

Abstract: Device for washing gluten, provided with at least one drum screen rotatably supported on a corrosion-resistant shaft, and equipped with means for supplying and discharging washing water and also with means for supplying the material to be treated at the one drum end and removing the treated gluten at the other drum end, at least two sets of spoke-type elements which are made of corrosion-resistant material and which support the circumferential wall of the drum screen being provided on the drum shaft at points disposed at a distance from one another in the longitudinal direction, which sets are each mounted, when viewed in the circumferential direction, on a bush which is made up of at least two parts made of corrosion-resistant material and attached to one another by flanges and which is to be firmly clamped to the shaft, the shaft being made of steel which is not corrosion-resistant and which has a high modulus of elasticity, and lining sleeves made of corrosion-resistant material being provided around the s

Abstract: A screw press type filter which comprises an alternately superposed arrangement of annular fixed plates (10) and annular movable plates (11), a filter cylinder (2) defining a fixed cylindrical space (12) by a row of openings of the fixed plates with both end portions of a screw (5) passed through this cylindrical space extending to inlet and outlet chambers (1, 3), and mechanisms (15, 16) for turning the movable plates in accordance with the rotation of the screw also provided, wherein the volumes of the spaces between adjacent ridges of the screws in the filter cylinder are reduced gradually from an inlet toward an outlet so that such a volume decrease corresponds to a gradual decrease in the water content of an object material being processed.

Abstract: In order to greatly shorten the filter exchange time required for detachably winding a filter (20) on the opening portions (2) formed in the outer circumferential surface of a filtration drum (1), projecting or recessed annular mounting portions (6) are respectively formed near edge portions of the outer circumferential surface of the filtration drum, to have portions (7) which prevent the wound filter from moving toward the center in the thrust direction of a main shaft (4) of the filtration drum and which maintain the filter liquid-tight, and the filter (20) is firmly fixed with fastening means (22).

Abstract: Apparatus and a method are presented for the mechanical removal of moisture from a filter cake. Differential pressure causes the flow of a treatment fluid through the filter cake. The treatment fluid displaces liquid originally present in the filter cake to preent cracking of the filter cake.

Abstract: A filter cloth comprising at least a base layer and a filtering layer, characterized in that the ratio T/L of the thickness (T) of the filtering layer to the length (L) of fibers of fiber bundles constituting the filtering layer is 0.02 to 0.7 and the sum of a projected area of the fibers onto the base layer surface is 8 to 350 times the area of the base layer surface and, a filter cloth characterized in being constituted with at least a base layer and a filtering layer mainly composed of fiber bundles of crimped fiber ratio over 5%.

Abstract: An auxiliary filter for removing residual particles from already filtered cutting fluids used in metal cutting machines, the auxiliary filter including a hollow wheel member rotated in a sealed tank into which the filtered liquid flows. Pressurized liquid passes through a fine screen on the perimeter of the rotating wheel to capture any residual particles. A high pressure backwash jets are directed at the screen as it rotates past an array of nozzles, and a collection trough draws any dislodged material away and out of the tank.

Abstract: A method and apparatus for efficiently separating solids from liquid/solid slurries are disclosed. The slurry to be separated is retainably placed within a container having one or more lift paddles secured within its inner cavity. The container is supported for rotation about an axis and has drive means for slowly rotating the container. As the container rotates, the lift paddles lift a portion of the retained slurry, allowing the liquid portion to fall back into the primary slurry pool to be separated, and lifting coarse solids toward the top of the rotation path of the paddles. The separated solids slide by gravity from the lift paddles as they approach the top of their rotation paths and into a collection tray. A filter that rotates with the container filters fine solids from the liquid portion of the slurry and also deposits the fine solids on the collection tray. The filtered liquids can be readily pumped from or recirculated to the separator.

Abstract: An apparatus for removing sludge is applied to a generally cylindrical filter for use in an electric discharge machine. The filter removes sludge in a process solution used in the electric discharge machine by flowing the process solution from an inner periphery surface to an outer periphery surface and/or the outer periphery surface to the inner periphery surface of the filter. A filter support device holds the filter rotatively with the central axis thereof as the central figure and inclining the central axis by a predetermined angle to the horizontal direction. The filter support device also includes cams for providing rotational driving force and successive impactive force to the filter. A motor provides rotational driving force to the cams. Sludge storage may receive the sludge falling from the filter. The filter support device may further alternate the inclined direction of the filter in a predetermined cycle by rotating with an axis perpendicular to the central axis as the central figure.

Abstract: The invention relates to a method and a device for clearing product, e.g., sugar, from the inside of a centrifuge basket of a discontinues centrifuge. A scraper blade, which is attached to a clearing rod, is pivoted toward the spun-off layer of product. The scraper blade scrapes off the product with a cutting edge, which is directed in a direction that is opposite to the direction of rotation of the basket. To optimize the product removal, it is preferable if the scraper blade, after it has been pivoted inward, contacts the product over virtually the entire height of the basket and at the same time scrapes off the product from the layer of product which is rotating at the clearing rotational speed in layers over the entire height of the basket. Once the product has been substantially completely removed from the basket, the scraper blade is pivoted back away from the basket wall.

Abstract: A self-cleaning fuel oil strainer, coupled to a continuous fuel flow, that includes a pair of canisters, each having a cylindrical wedge wire fuel oil filter screen. An elongated brush running the length of the screen is disposed between two confining walls also running the length of the screen to form a chamber. A elongated partition, including two sets of apertures, is used, along with the elongated brush, to divide the chamber into two particulate dislodge chambers and a drain subchamber. A drain is in fluid communication with the drain subchamber. During cleaning, the drain is opened and the screen is rotated against the brush for liberating the particulate contaminants and a limited amount of fuel oil into the two dislodge subchambers. The particulate contaminants and the limited amount of fuel oil then pass through the apertures at a high velocity and into the drain subchamber which exits through the drain.

Abstract: A method and device for drainage of a fibrous suspension where a converging drainage gap is formed between a first area and a second area. At least one of the first area or the second area is water permeable. A curved drainage zone is connected to the converging drainage gap. The first area moves relative to the second area. A fibrous suspension is introduced into the converging drainage gap. The fibrous suspension is transported by one of the first area and the second area as a layer. The first area and the second area are compressed closer together thereby causing drainage from the fibrous suspension through one of the first area or the second area.

Abstract: A system for filtering fluids uses the pressure differential across a filter element between an internal filter volume and an external filter volume to control the rate of fluid flow through the filter element. The internal filter volume communicates with a backwash volume contained in the external filter volume. The backwash volume may be movable relative to the filter element to clean accumulated filtrate from the filter element through backwashing. By increasing the pressure in the internal filter volume, the rate of backwashing can be increased while the rate of fluid flow into the internal filter volume is decreased. Particularly when the filter element becomes clogged, damage to a filter caused by an excessive pressure differential across the filter element may be decreased.

Abstract: The invention provides an apparatus for screening a fibrous slurry including a rotatable drum whose circumferential wall includes a screen. The screen has spaced openings with longitudinal axes or elongations which are large relative to the transverse axes or gaps defined by the openings. The openings are disposed with their longitudinal axes extending circumferentially of the rotatable drum. The drum has at least one open end. A slurry delivery conveyor terminates adjacent to the drum for delivery of slurry within the drum.