Abstract: A method and apparatus to clean a filter drum used for thickening lime mud. The drum is rotated about a horizontal axis in a first direction so that the circumferential surface of the drum moves into contact with lime mud in a vat and a precoat layer formed on the drum, as well as an external layer of lime mud which forms a thickened lime mud cake when a vacuum is applied to the drum withdrawing liquid from the lime mud. The thickened external layer of lime mud cake is scraped from the drum at a second side of the vat, and at a first opposite side of the vat a first jet of liquid is directed onto the drum surface (e.g. at a pressure of about 30-100 bar) to remove a strip of the precoat layer, a third jet of liquid cleans the drum after removal of the precoat layer, and a second jet of liquid is directed onto the drum with sufficient intensity (e.g. a pressure of about 2-20 bar) to remove, by spreading and partially detaching, a strip from the thickened lime mud cake.

Abstract: Centrifugal filtration capable of improving recovery of crystal in a baskey. The basket is so arranged that a central axis thereof is inclined with respect to a horizontal direction to obliqely downwardly orientate a bottom wall of the basket. A crystal recovery auction pipe is arranged which includes a pivotally movable section pivotally moved in the basket, of which a distal end is advanced into crystal in the basket. Crystal in the basket is recovered by suction through the distal end of the suction pipe, which is ultimately displaced to a corner of the basket between a lowermost portion of a peripheral wall of the basket and a bottom wall thereof. This permits crystal collected to a lowermost section of the basket to be substantially recovered by suction through the suction pipe, to thereby improve crystal recovery.

Abstract: A scraper blade assembly utilizes an over-center spring to bias the scraper blade assembly both into engagement and out of engagement with a conveyor, such as a moving belt, on a device for separating solids from liquids. The over-center spring extends between a fixed attachment point on the device and a pivoting attachment point on a handle secured to the scraper blade assembly. The invention is particularly applicable to belt filter presses and gravity belt sludge thickeners. An over-center spring may be secured to both ends of the scraper blade assembly to minimize torsional deformation of the scraper blade by the material being separated from the moving belt.

Abstract: The present invention provides a self cleaning doctor blade which is a floating blade containing beveled edges or "relief gaps" comprising beveled mitered leading edges on each blade. This arrangement allows for the blades as a whole to remain free from build-up of fine particulate matter. The invention further provides a doctor blade made of replaceable units allowing for fine adjustment of blade-to-drum surface distance as well as replacement of small damaged segments rather than the whole blade.

Abstract: A magnetic separator for purifying coolant including sludge mainly comprising needle-shaped chips for the purpose of recycling. A comb-type guide plate formed of a magnetic substance material is provided before a squeezing roller, in such a manner that convex and concave portions are in conformity with the magnetic lines of force produced by the arrangement of magnets of a fixed magnet-group cylinder stored in a rotary cylinder. Thus, magnetic flux curtains are formed between the convex portions and the rotary cylinder. Needle-shaped chips which have come as attracted sludge standing in the shape of a jet on the outer peripheral surface of the rotary cylinder are interrupted from going ahead by the magnetic flux curtains, and become accumulated sludge, and are led to lying attracted sludge on the left and right sides. Thus, the attracted sludge is prevented from stabbing a squeezing roller, and operations of extracting liquid from the sludge are continued without causing any trouble.

Abstract: In a rotatable filter, such as a disk filter, for separating solid particles from a liquid mixture, in which a filter material (3) is partially immersed, a cake-removal member (11) is designed to take off a layer of the formed cake of solid particles from the filter material, so that a liquid-permeable coating, which itself acts as a filter medium, is left on the filter material which is moved down into the liquid mixture which is to be separated. According to the invention, for renewing the coating a spraying apparatus (13-17) is designed to spray jets of liquid in at least one spray zone (18), through which only a part of the filter material passes upwards during the rotating movement of the filter material, so that the whole cake of coarse particles, including the coating, is removed from the part of the filter material by the jets of liquid.

Abstract: A process is provided for the treatment of suspensions comprised of oil, water and solids in which the suspension is subjected to centrifugation employing a centrifugal filter, coated with an organic powder having an index of compressibility comprised between 0 and 1.2, and wherein under the effect of the centrifugation, the suspension is subjected to an acceleration comprised between 10 and 2500 times the gravity force, that is, 100 to 25000 m/s.sup.2. The solids are retained by the coating and the centrifugate is collected. The invention is useful for the treatment of crude oil, of lubricants and oils which produce suspensions or emulsions rich in fats.

Abstract: A screen assembly is described which comprises a flow channel along which sewage is intended to flow, in use, a continuous flexible belt entrained around roller or wheel means and projecting into the channel, and means for driving the belt. The belt is perforated such that relatively large solids carried along the flow channel in the sewage are trapped by the belt adhering thereto due to a pressure differential across the belt. Movement of the belt lifts such solids from the flow channel. The belt is of thickness less than or equal to 1 mm.

Abstract: A multi-function fluid treatment system which can filter fluids or diffuse gases into liquids. To achieve filtration, the system includes a housing with multiple filter cartridges therein. The cartridges are connected to a drive system which rotates them in unison. Fluids to be filtered enter the housing and surround the cartridges. Cartridge rotation scrubs solids from the cartridges and promotes fluid flow therein. A separate cleaning system is also provided which involves a cartridge wiping assembly having multiple wiping members thereon. The wiping members directly contact the cartridges to remove collected debris and preferably involve multiple bristles secured to a vertical support member. The support member may consist of dual wires secured together with the bristles therebetween. The bristles can also be arranged in elongate rows (one row per cartridge) on the support member. In either embodiment, the wiping assembly improves filtration efficiency and reduces maintenance requirements.

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 device for removing floating and suspended debris from a liquid flow passed through a liquid flow flume (3) is disclosed, the device including a separator (9) positioned within the liquid flow flume at an angle with respect to the flume and extending across the path of the liquid stream for collecting floating and suspended debris thereon. An elongated conveyor assembly (10) having an elongated tubular housing (20) with a first conveyor portion (11) and a second conveyor portion (12) is also provided as a part of the device. The first conveyor portion of the conveyor assembly is positioned within the separator and extends therefrom, the first portion of the conveyor assembly, as well as the conveyor assembly, being independently supported with respect to, and without being formed as a part of, the separator.

Abstract: The invention relates to a backwashable filter, which comprises superimposed elements, particularly having an annular design, for producing filter candles. In the case of the filter candles the elements are subject to a radial through-flow from the inside to the outside in filter operation, whereas the flow direction is reversed for backwashing. On the inside of the filter layer is provided on each element a lip, elastically deflectable in the flow direction and facing the flow, which forms a gap opening with a fixed edge of the adjacent element. Under the action of the differential pressure of the flow acting on the wide front face of the lip, the lip performs a movement in which the gap opening is narrowed to a limited extent and as a result of the elastic deformation corresponding restoring forces are built up.

Abstract: An elongate scraper apparatus for scraping filter cake from a moving filter medium of a filter apparatus comprises an elongate bar or scraper having a length sufficient to substantially span the face of the filter medium upon which filter cake is deposited. The bar has a broad, continuous, smooth, front face that is parallel with the surface of the filter medium. The broad, front face of the bar or scraper allows substantial contact with the surface of the filter medium over the entire surface of the front face of the bar or scraper. The elongate bar or scraper further has a top face that forms a chisel edge at the top edge of the front face. The chisel edge points in a direction parallel with the surface of the filter medium. As the filter medium bulges outwardly, it applies uniform pressure on the broad face of the bar or scraper so that the bar or scraper flexes to conform to the contour of the bulging filter medium.

Abstract: A fluid filter assembly having a body with a chamber for receiving a filter element supported by the body. At least one cleaning device is positioned adjacent the inlet side of the filter element. The cleaning device includes a hollow duct for collecting dislodged particulate matter, an adjustable scraper or brush and a deflector substantially equal in length to the scraper or brush. Nozzles may be provided for directing pressurized cleaning fluid toward the cleaning device.

Abstract: The invention relates to an apparatus for removing solid components from a fluid in a trough (1) having a transport device (3) in the form of a transport trough (4) and a rotationally driven transport helix (6), the transport device (3) having at one end a solids outlet (9) and at the opposite end a sieving surface (15) at least in portions of the surface, in which the solid components are able to be sieved out of the fluid and are able to be transported to the solids outlet (9) via the transport helix (6) in the axial direction of the transport device (3).

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: An interior wedge wire drum screen is mounted wholly within an exterior drum screen of narrower wedge wire spacing, and both are mounted to a frame and caused to rotate about a common central axis. One end of the outer drum is open and the other is closed by a disc-shaped drum head. The inner drum has an open end which is spaced inward of the open end of the outer drum. The waste water is presented to the surface of the inner drum screen by a waste water infeed which employs a vertical column. The column extends upwardly of an inlet and has a gradually increasing cross-section for reducing the flow of velocity of the waste water. A horizontal trough extends along the axis defined by the drums and communicates between the top of the column and a tray. The edges of the tray terminate in weirs which are parallel to the sides of the inner drum. Water flows in a smooth sheet over a weir to impact the sides of the inner screen with low velocity.

Abstract: A food soil handing system for a dishwasher is provided. A main carrier arm has two driver arms rotatably mounted thereon. Each driver arm turns a driver gear engaged with a stationary ring gear. Rotation of the driver arms results in rotation of the main carrier arm, providing significant torque. The main carrier arm is disposed above a drain plate having perforations to drain wash water. A pair of resilient wipers are secured to the main carrier arm to wipe across the plate as the carrier arm rotates. The wipers mash soft food particles through the perforations. Hard items are either swept around or passed over by the wipers for later retrieval.

Abstract: The centrifugal filter comprises a rotatable travelling basket (5) disposed within a collector chamber (1). A machine body (2) which can be supported on a support (3) carries a bearing arrangement (8) for the hub (14) of the travelling basket (5). In the travelling basket (5) which partially comprises holes is present a filter element (20) in such a way that during the rotation of the travelling basket the liquid to be filtered can flow out through the filter element (20) and through these holes. For removing the filtrate, retained on the filter element and consisting of solid particles, a lifting device (22) is present which can be moved back and forth. The travelling basket (5) comprises a travelling basket neck (7) connected with the travelling basket hub (14), which neck is provided with passage openings which communicate at least partially with further passage openings disposed in the bottom portion of the machine body (2).

Abstract: A method and apparatus for improving the operation of a vacuum drum filter. A hollow and perforated shower roll is located at the top of a vacuum drum apparatus for drying and cleaning paper pulp. The interior of the shower roll is provided with a liquid distribution pipe having a plurality of spaced openings therealong, the pipe also having a substantially vertically extending dam which extends radially to adjacent the lower interior surface of the shower roll. In operation, rotation of the vacuum drum in a vat of paper pulp to be dewatered results in the continuous formation of layer of pulp on its exterior surface, the layer being compressed by the shower roll at the nip between the vacuum roll and the shower roll. Concurrently, the shower roll discharges or exudes water onto and into the pulp layer at the nip.

Abstract: A machine for conditioning a flocculated mixture formed by adding high molecular weight polymer to a slurry of ultrafine particles such as are found in mining silts, clays, sludges and the like. With this machine, such mixtures, which have already been partially dewatered, can then be substantially further dewatered. Reductions to between about 27% and 30% moisture content have been obtained. The machine includes a perforate endless conveyor belt onto which a continuous flow of the mixture is deposited and an array of stationary inverter plates and rollers in which pairs of rows of plates alternate with the rollers, both the plates and the rollers extending downwardly into the mixture as it is being moved on the belt. The rollers in the array squeeze water out of the mixture without disrupting bonds between the polymers and ultrafine particles and, in the process of applying pressure, contribute to the formation of new bonds.

Abstract: A backwashable fluid filter formed with a filter element which is disposed so that it can be rotated about its axis inside the filter housing by a drive mechanism and through which a radial flow passes. A backwashing device is provided which includes a dirt removal channel which extends parallel to the axis of the filter element. When the filter element is backwashed, clean fluid flows back through the filter element, removes dirt particles adhering to the filter element and carries them into the dirt removal channel. In order to pre-clean the filter element, a resiliently mounted stripping device is arranged in front of the backwashing device to remove coarse dirt from the surface of the filter element before it reaches the backwashing device. The filter element is provided with slit-like openings, each of which has a substantially U-shaped configuration and defines a resilient tongue.

Abstract: A filter unit of an automatic screw machine employs a filter element that rotates relative to, and in contact with, a brush element. Foreign matter is thereby automatically dislodged and ejected from the filter element.

Abstract: A separator device for separating solid material from liquid, particularly in sewage, has an outer casing with respective solid material and liquid outlets, a drum rotatable within the casing and formed of mesh panels for flow of liquid therethrough, spirals within the drum for moving the solid material within the drum, upon rotation, towards an outlet therefrom position above the solid material outlet of the casing, the spirals being each supported at their outer periphery by the periphery of the drum and at their inner periphery by an inlet feed tube and/or a central driven shaft of the drum, and in-line bearings around the shaft and a journal outside respective opposite ends of the casing.

Abstract: A separator with a continuously rotating magnetic drum which is partially disposed in a liquid flow path to attract and thereby separate magnetic particles from liquid delivered to the flow path. The separator includes an inclined scraper blade which removes the magnetic particles from the drum. The magnetic field of the drum penetrates the inclined scraper blade causing particles to build up on the blade, thereby allowing coolant which was carried with the particles on the drum to drain back to the flow path. A pushing force caused by particles subsequently delivered to the scraper blade by the rotating drum shoves the buildup of particles past the magnetic field acting on the scraper blade and down a discharge chute into a waste container.

Abstract: A rotating drum filter assembly for thickening lime sludge includes a liquid jet distributor for directing liquid jets against a strip of lime sludge filter cake on the ascending side of the drum. The distributor is positioned on the ascending side of the drum and within 45.degree. of a vertical plane tangential to the drum peripheral surface. The liquid jets are directed so as to disperse the strip in a manner such that substantially all of the lime sludge comprising the strip remains on the drum. Cake wash water formed by water distributed from shower heads immediately refills the cleaned strip thereby minimizing loss of vacuum within the hollow drum interior.

Abstract: An apparatus which performs solids particles separation from a liquids/solids slurry, and subsequent drying of such solids particles, within a single enclosure. Further processing functions, such as reslurry washing, plug washing, crystal growth and other reactions, can also be carried out within that single enclosure.

Abstract: An interior wedge wire drum screen is mounted wholly within an exterior drum screen of narrower wedge wire spacing, and both are mounted to a frame and caused to rotate about a common central axis. One end of the outer drum is open and the other is closed by a disc-shaped drum head. The inner drum has an open end which is spaced inward of the open end of the outer drum. The waste water is presented to the surface of the inner drum screen by a waste water infeed which employs a vertical column. The column extends upwardly of an inlet and has a gradually increasing cross-section for reducing the flow of velocity of the waste water. A horizontal trough extends along the axis defined by the drums and communicates between the top of the column and a tray. The edges of the tray terminate in weirs which are parallel to the sides of the inner drum. Water flows in a smooth sheet over a weir to impact the sides of the inner screen with low velocity.

Abstract: A device for removing oil and oily substances from a liquid, in particular water, has at least one open-ended tube that can be at least partially submerged into the oil-contaminated liquid to receive the liquid and that rotates around its longitudinal axis. The surface of the wall of the tube is treated so that it is particularly effective in retaining oil and oily substances. In addition, at least one scraping element that lies against the wall of the tube scrapes oil and oily substances away from the wall of the tube and transmits them to a collecting reservoir.

Abstract: A method and apparatus for removing solids from the porous surface of a rotating vacuum drum. Such drums are used to separate the solid and liquid phases of a slurry, such as a calcium carbonate containing mud slurry. Doctor blades are often used to scrape the drum exterior surface of excess mud to minimize the build up of solids thereon. Nonetheless a cake eventually forms on the drum and clogs the porous surface and stops the vacuum action. The drum is stopped and the drum backwashed by water to dislodge the cake. According to this invention, a jet of water from a nozzle is substantially tangentially directed against the drum surface to thereby eliminate stopping the drum for cake dislodgement. The nozzle is located beneath and moves with a reciprocating secondary doctor blade, the secondary doctor blade being of a length less than the width of the drum. A stationary, main doctor blade spans the entire width of the drum.

Abstract: A filter apparatus for filtering machine tool coolant is disclosed as including a drum filter or a disc filter assembly including a hollow rotatable mandrel mounting a drum filter assembly or plurality of removable hollow disc filter elements each element having a foraminous non-reticulated metal screen having minute openings and a smooth planar surface for providing improved scrape cleanability and preventing movement of machining chips, particulate and also elongate contaminants from one side of the filter to the other side thereof.

Abstract: An apparatus for separating solids from liquids including an endless rotatably mounted band of collecting arms for collecting screened solid material, each of the collecting arms having a leading collecting face and two opposite sides adjacent the leading collecting face, and being mounted on support rods which are arranged in spaced relationship around the band, link pieces rigidly attached to the collecting arms for linking one support rod to the next, such that the link pieces form continuous chains around the band, and separate the collecting arms one from the other to form slots between the link pieces, said link pieces being rotatable on the support rods to which they are attached, and a rotatable set of discharging teeth arranged to cooperate with said movable band by entering the slots as the band rotates to move along the leading collecting faces of the collecting arms, thereby to remove collected material gathered at the slots and from said leading collecting faces of the collecting arms.

Abstract: A backwashable self-cleaning strainer has a vertical housing containing a rotatable strainer basket. The housing has an inlet adjacent the top thereof and an outlet adjacent the bottom wall, with a flush discharge opening in the bottom wall. Components for rotating the strainer basket are located outside the flow of water containing particulates that enters the housing. A hollow backwash conduit with a passage through the sidewall is positioned adjacent the inner surface of the strainer basket and communicates with a sealable aperture in the wall of the housing. Upon opening of the aperture, cleaned water flows through the side wall of the strainer basket, removing particulates therefrom, and out the hollow backwash conduit. An intermittently rotatable brush is also provided to brush the inner surface of the strainer basket.

Abstract: A self-cleaning filter includes two cleaning blades spaced from about 75.degree. to about 115.degree. about the circumference of a rotatable tubular filter screen. The tubular filter screen is rotated relative to the two cleaning blades whereby particles in the slurry being filtered having a size less than a predetermined size are forced through the tubular filter screen and particles having a size not less than the predetermined size are removed from the exterior surface of the filter screen and then removed from the filter. The self-cleaning filter is particularly suited for filtering slurries in which solid particles tend to agglomerate.

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 filter drum with a tubular filter belt is journaled for rotation on a pipe which serves to supply filtered coolant to spray nozzles located within the drum and operable to backwash the filter belt.

Abstract: A screen basket with greater structural integrity and fatigue resistance is mounted within a screening apparatus with substantially no axial compressive loading. The screen basket has end portions attached to a pair of support members with screen basket position engagement elements or fasteners to place the screen basket in a condition with no substantial axial compressive load. The screen basket, supported in this way, remains stationary when exposed to high hydrodynamic torsional forces and reduces the magnitude of deflections and bending stresses placed on the screen basket. The screen basket is preferably mounted in axial tension or with an axial neutral load.

Abstract: A method and apparatus for separating solids from liquid containing same comprises a cylindrical casing within which a rotor assembly or block having a conicalmesh rotates about a vertical axis with the mesh walls upwardly diverging. A liquid-solid slurry is introduced tangentially to the inside of the mesh at a top inlet. Stationary wiper arms inside the mesh remove the solids from the mesh as it rotates. Fluid pressure inside the mesh, pumping effect of the rotating blades, gravity force on the slurry and particularly tangential pump suction at the bottom of the casing, drive the liquid out through the mesh, while the solid material is expelled vertically downwards through a central outlet opening in the bottom of the mesh.

Abstract: A mobile multi reservoir unit aspirates liquid with solids from septic tanks, treats immediately the liquor by a flocculent polymer and dehydrates the product by a low speed vertical centrifugal machine; the liquid is returned to the septic tank and the solid is maintained in a mud stade, easy to rake off by a rotating folding knife, followed by transfer to a storage reservoir; a pump unit enacts the material transfer from and to each reservoir in succession by aspiration and by pressure build up.

Abstract: A multi-deck filter comprising a plurality of filter plates arranged horizontally one above another which are held in parallel planes by respective frames surrounding them. A filtrate chamber and a sludge chamber are formed in each case alternately between adjacent filter plates and frames. A filter belt, which is moveable stepwise by a transport device, is positioned between two pairs of filter plates. The filter belt is unwound from a supply roll positioned outside of the multi-deck filter and, after removal of the dirt filter cake, collected by the multi-deck filter wound onto a collecting roll. A scraper, which contacts the surface of the filter belt, is positioned transversely and obliquely to the filter belt between multi-deck filter and collecting roll, for scraping off the dirt filter cake from the filter belt. An abutment positioned below the filter belt is associated with the scraper.

Abstract: Apparatus for separating solids and liquids has an initial separator for removing coarse solid material from a mixture of solids and liquids, a first screen for separating further solid material from the liquid and a first auger extending axially through the first cylindrical screen for removing the separated further solid material from the first cylindrical screen. A second screen receives the liquid from the first screen and separates fine particles from the liquid, and a compactor between the first and second screens compacts the solid material removed from the first screen by the first auger. A second auger is provided in the second screen for mixing and removing the compacted solid material and the separated fine particles.

Abstract: The invention relates to a process and a centrifuge for removing solids located on a cylindrical casing wall (3) of a rotating centrifuge, in particular solids precipitated in the centrifuge from a liquid-solid mixture, to a solids exit opening (6) by sweeping the entire casing inner wall (9) in the direction of the solids exit opening (6). In order to reduce clogging, it is proposed according to the invention that in each case the casing inner wall (9) is swept in strips up to the solids exit opening (6), during one sweep up to the solids exit opening (6) only a part of the casing inner wall (9) is swept, and after a certain time the entire casing inner wall (9) is swept by strips (11) swept sequentially in time.

Abstract: A manure separating apparatus includes a trough with angularly bottom surfaces that converge downwardly to a discharge opening. A drain screen is located above the bottom trough surfaces and includes somewhat similarly angled downward converging infeed and discharge surfaces. The infeed section of the drain screen is approximately twice as long and at a smaller angle to the horizontal than the discharge screen section. A manure/liquid slurry may be introduced at a top infeed end of the screen and moved downwardly along the infeed section of the screen by a paddle conveyor. Separation of solids occurs primarily along the infeed screen section. The slurry is then moved angularly upwardly along the discharge section of the screen for final dewatering. The discharge section is spaced above the trough bottom to avoid liquids on the trough bottom below to facilitate dewatering of the solids before discharge.

Abstract: A method and apparatus for fibrous suspensions in the wood processing industry and more specifically to a so-called drum cylinder, the basic construction of which comprises a vessel, into which suspension being thickened is supplied and a wire-surface cylinder rotating in the vessel. The drum filter is characterized in that the closure member of the drum filter has a channel for leading gas from the filtrate tubes through the compartments of the distribution chamber to the outside of the closing member. The method is characterized in that the operation phase of the filter cylinder is divided into five separate stages. In the first stage, when the cylinder descends on to the vessel, air and the initial filtrate are discharged from the filtrate components and the formation of the pulp web on the wire surface begins. In the second stage, filtrate is discharged with vacuum and the formation of the pulp web continues.

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

Abstract: An apparatus for recovering oil from used lubricant includes a centrifugal separation unit having a centrifugal tank for receiving and separating used lubricant and a scraping unit having blades provided in the tank for scraping contaminant from the inner side of the wall of the tank. A synchronizing mechanism is provided for simultaneously rotating the tank and the blades at different rates to cause the blades to scrape the contaminant.

Abstract: A drum vacuum filter is shown which draws-in and radially outwardly projects the liquid content of a slurry or the like while the latter is advanced vertically along a passageway defined between a cylindrical rotating filter and a rotating drum wall, the latter of which collects and advances the solid material content of the slurry downwardly along the passageway for delivery and, as facilitated by a scroll scraper extending therealong. The liquid content is drawn under vacuum pressure induced force by a series of spaced-apart flutes or plates disposed along the exterior of the rotating filter, and radially or transversely outwardly with respect to the filter for segregated delivery with respect to the solid material content of the slurry or changed-in liquid.

Abstract: A device for extracting liquid from sludge which uses a perforate conveyor belt to carry the sludge through the device. A portion of the belt carrying the sludge is supported by a grid support system which includes a series of wear support members. These wear support members each have a rigid body member having an insert wear strip slidably mounted on the rigid body member which can easily be removed from the device without disconnecting the body member from the device.

Abstract: An apparatus for separating filter cake from an endless filter web, and method for using the same, for use in conjunction with a stacked plate filter system and filter web extractor. The filter cake and filter web separator apparatus includes a downwardly sloping support tray and a wedge-shaped plow blade having a resilient scrapper and suspended above, and generally parallel with, the support tray. As contaminated filter web exits a plate filter and is pulled through the separator apparatus by the filter web extractor, the resilient scrapper dislodges the filter cake from the filter web as the contaminated portion of filter web passes between the plow blade and the support plate and displaces the cake off the filter web where it falls into a suitable collection container. The filter web exits the apparatus from between the plow blade and support tray having substantially all of the filter cake removed from the filter web.

Abstract: An improved fluid-strainer is provided which makes provision for improved methods of converting the same between motorized and manual modes. Included in the fluid strainer is a gear motor housing for facilitating the conversion as well as inspection and removal means. Also provision is made for flushing of the fluid strainer so as to avoid cycle restart.