Abstract: The present invention is a centrifuge device which separates chips or shreds of containers from whatever liquid residue remains within these containers. Though this technology is suitable for a number of applications, a primary objective is the separation of the recyclable plastic of a motor oil container from the remaining re-usable motor oil within the container after the container has ostensibly been emptied. It is an objective to accomplish this in an economically advantageous manner which uses neither a solvent nor a wash process, and which reclaims the oil in a suitable form for reprocessing. In its preferred embodiment, the present invention may be utilized as a compact, free-standing size reduction and reclaiming device at the location where the container is used, such as in automotive service stations, and the like. In a second embodiment, production units may be used in plastic reclaiming plants where large quantities of a given plastic container are being centrally processed.

Abstract: A strainer that is used in association with a motor-driven pump that sucks water out of outdoor pits, reservoirs, streams, ponds, and the like, usually for irrigation or watering purposes. The strainer has a cylindrical screen disposed on a spool-like body for rotation substantially about its own axis. Nozzles that are disposed interiorly of the screen spray water outwardly through the screen to both rotate the screen and to dislodge any debris that may have accumulated on it due to the pump suction force. The screen is a plastic that has a specific gravity of approximately one and it is guided for rotation by the margins of circular discs that form the axial ends of the spool-like body.

Abstract: A method for removing a liquid stripper composition from a slurry comprised of the liquid stripper composition and of photoresist film particles which were removed from a circuit board substrate by using the liquid stripper composition. The slurry flows over the inner surface of the porous wall of a drum under gravity to form a generally uniform layer on the inner surface of the drum. Liquid escapes from the slurry through the porous wall of the drum.

Abstract: A liquid filter comprises a cloth filter media in the form of a drum. Contaminated liquid flows into the interior of the drum thence radially outwardly through the cloth filter media as the filter rotates. Sludge is constantly backwashed from the filter media by pressurized liquid in the reverse direction of filtration. Flexibility of the cloth filter media materially enhances backwashing efficiency. Sludge is collected by a collector internally of the drum.

Abstract: Apparatus for separating liquids and solids, comprising, separator screen means for receiving and separating the solids and liquids, conveyor means for feeding the separated solids upwardly from the separator screen means, and compactor means for compacting the solids, the conveyor means comprising a first conveyor extending at a first upward inclination through the separator screen means and a second conveyor extending further upwardly and at a greater inclination than the first conveyor means.

Abstract: Method and equipment for filtration of a suspension so that the suspension to be filtered is fed from a feed part (4) onto the filter face of a filter member (5), which moves relative the feed part. The pulp layer is formed on the outer face of the filter member and the filtrate flows into the interior of the filter member, and the pulp layer is removed from the filter member at the removing point. After the pulp removing point (17), before the feed point (4), one or several cleaning points (12) are provided wherein liquid is made to flow through the filter member (5) from the inner face of the filter member to the outer face. The flow rate of the liquid that flows through the cleaning point or points is adjusted higher than the rate of any liquid flow that may flow through the rest of the filter member from the inside-face side to the outside-face side.

Abstract: The invention relates to a method for cleaning the filter plates of a suction drier, which suction drier (20) comprises a tank (13) for the slurry to be suction dried, in connection to which tank there rotates one or several filter disks formed of the said filter plates (14), on the surface or surfaces of which filter plates (14) there is collected and dried, owing to the suction flow passing through the filter plates (14), a filter cake, which is scraped or otherwise removed from the surface or surfaces of the filter plates. For the cleaning of the porous structure and surfaces of the said filter plates (14), there is arranged, in the tank (13) of the slurry to be filtered, under the liquid surface (11), mainly in the surface water area, an ultrasonic vibrator or vibrators (10), whereto ultrasonic electric power is fed from an ultrasonic generator (22). The cleaning with the ultrasonic vibrator or vibrators (10) is carried out esentially immediately after scraping.

Abstract: A method for keeping a screen surface or a filter surface clean, wherein a pressure fluid is introduced from a conduit to a secondary side of a screen/filter drum, which fluid flows, during an underpressurized stage caused by blades of a rotor rotating on a primary side of the screen/filter drum, through the screen/filter drum from the secondary side to the primary side thereby rinsing the openings of the drum and making them clear.

Abstract: An arrangement for an inlet and an outlet in a rotating drum sieve for the separation of solid particles from a liquid mixed with particles in which a drum sieve comprises a drum casing provided with a sieve opening and a feed screw situated internally within the drum and is arranged for the supply of a liquid mixed with particles to the internal space of the drum and for the removal of sieved material from the internal space of the drum. The invention permits, amongst other things, a simple design for the sieve drum and the even and effective supply of liquid mixed with particles to the drum sieve, as well as effective and simple discharge of the drained material from the internal space of the drum.

Abstract: Method in a suction dryer (10), which comprises a basin (12) for a suspension to be suction-dried, in connection with which basin one or several filter-plate discs (14a) revolve, onto whose faces a filtrate cake is gathered and dewatered by the effect of a suction flow passing through the filter plates (14a), the said filtrate cake/cakes being scraped or otherwise detached from the faces of the filter plates (14a). For the purpose of cleaning the porous structure and faces of the filter plates (14a), an ultrasonic detector or detectors (30) are provided in connection with the basin (12) for the suspension to be filtered, to which detectors an electric power of ultrasonic frequency is fed from an ultrasonic generator (32). For the time of the cleaning intensified by ultrasound, the suspension basin (12) is filled with a connecting and cleaning liquid, e.g. water.

Abstract: A filter for separating particles from a flow of liquid comprises a filter drum (1) rotatably mounted about a substantially horizontal shaft and partially immersed into the filter liquid. The filter drum comprises a filter cloth (2) forming the circumference of the drum and having a plurality of radially extending sections between two drum end plates (3,4), one (3) of which is provided with a central opening through which the unfiltered liquid enters the interior of the drum. A drive means (9) rotates slowly. A belt conveyor (18) extends over the surface (23) of the liquid flow for removing the particles carried along by the filter cloth out of the liquid and falling down from the filter cloth in an area around the highest point of the drum. The filter cloth side edges formed as beads are clamped in grooves on the inside of the end plates (3,4), and the end plates (3,4) are fixed to each other by means of spacer members (D) spaced from the filter cloth.

Abstract: A solid-liquid separation apparatus wherein a solid-liquid mixture is introduced into a rotary filtration drum having filter cloth mounted thereon and is allowed to pass through the filter cloth to thereby separate the solids contained therein. The filter cloth has one surface facing the interior of the drum and covered with a napped filter layer which is formed by a multiplicity of fibers having a diameter of 0.1 to 10 .mu.m. The filter cloth preferably has an elongation percentage of not smaller than 1.0%. A base material of the filter cloth includes a weft extending along the rotational axis of the drum and a warp extending in the circumferential direction of the drum. The fibers of the napped filter layer are formed by napping chiefly the weft in the direction of the warp.

Abstract: Screen cleaning showers for a sludge dewatering rotary screen thickener are kept open and effective by periodically rotating a steel wire brush positioned coaxially within the cleaning shower manifold. Shower nozzles are set into the manifold to assure full mechanical wiping of a nozzle interior surface by the axially rotating brush bristles. Brush rotation is motor driven. An automatic controller periodically and simultaneously rotates the nozzle cleaning brush and opens a normally closed solenoid valve in the shower manifold drain line.

Abstract: A filtration apparatus includes a tapered conveying cylinder, a rotating filtration cylinder disposed around the tapered conveying cylinder, a pair of spaced-apart driving members movably supported to the rotating filtration cylinder for freely changing a size of a treatment zone between the tapered conveying cylinder and rotating filtration cylinder and one or more steam injection pipes disposed above the rotating filtration cylinder. The solid waste product in the treatment zone is heated and cleaned away by spraying the surface of the cylinder with hot steam through nozzles of the injection pipes, and freely changing the size of the treatment zone on demand.

Abstract: A device for removing waste material screened or filtered out of liquid flowing through a channel (1) has a basket-type interceptor (6) that is slanted and cylindrical and that rotates subject to power, extends to some extent into the liquid, and has its upstream face (8) open and its downstream face (9) solid. A conveyor (13) is positioned coaxially in relation to the interceptor, leads to a waste-material deposit point outside the liquid, accommodates a powered conveyor screw (18), and has an intake scoop (15) in the vicinity of the interceptor for collecting the waste material. A mechanism positioned stationary above the intake scoop releases waste material from the interceptor. The interceptor consists of a number of continuous annular disks (8) distributed along the outer surface with gaps between them and the waste-material releasing mechanism is a raker-stripper (28) that at least to some extent extends through the gaps between the annular disks.

Abstract: In known worm centrifuges comprising a solid bowl and a sieve bowl, a cleaning and predewatering of the solids/liquid mixture occurs in the solid bowl when dewatering solids/liquid mixtures and an after-dewatering of the solids occurs in the following sieve bowl. In general, a relatively good cleaning and dewatering effect is achieved with such previously-known worm centrifuges comprising a solid bowl. According to the invention, the after-dewatering effect in the sieve bowl can be quite substantially increased in that the conveyor worm is provided with agitator elements in the region of the sieve bowl, the agitator elements immersing into the solids layer. As a result thereof, in particularly, a circulation of the solids layer is achieved in the sieve bowl in a very advantageous manner and, as a result thereof, the after-dewatering of the solids before discharge from the worm centrifuge is very substantially improved.

Abstract: A rotary self-cleaning strainer comprises a circular cylindrical walled PVC pipe on which a circular cylindrical filter screen assembly is journaled for rotation. The PVC pipe has an intake that is surrounded by the filter screen assembly and a discharge that is connected to a pump. When the strainer is placed in a body of water that is to be pumped, water is drawn through the screen that forms the sidewall of the filter screen assembly and enters the intake of the PVC pipe. The filtered water is conducted through the PVC pipe and to the pump. A nozzle structure disposed within the filter screen assembly is supplied with water from a separate supply line connected to the strainer. The water is forcefully emitted against the screen to both rotate the screen assembly and dislodge adhering debris from the exterior of the screen. The strainer also has a lip type seal and a series of wheels which seal and journal one axial end of the filter screen assembly to and on the PVC pipe.

Abstract: A shower pipe for a rotary drum filter includes first and second parallel rows of spray holes which extend along the length of the pipe. The holes in one row are staggered with respect to the holes in the other row, with both rows being positioned circumferentially in the same quadrant of the pipe. Each spray hole has its own separate fan-shaped diffusion flange extending in a generally parabolic curve from the adjacent hole. Each spray hole may be formed by a premolded plastic sleeve-like insert which is inserted through and seated within prebored holes in a section of the pipe. Each insert defines a spray hole or nozzle for discharging liquid under pressure from the pipe onto its associated diffusion flange. Each diffusion flange member may be premolded to include a female threaded upper portion which threads onto a male threaded projectng portion of the insert extending from the outer wall of the pipe.

Abstract: A filtering apparatus for filtering chips out of chip-containing waste liquid which includes a cutting oil collection tank and a filtering drum rotatably mounted in the tank. A waste liquid supply means, and a chip transport conveyor are provided for supplying chip-containing waste liquid into the filtering drum and removing chips therefrom, respectively. The filtering drum also includes annular guide groove members and buckets slidably supported by the guide groove members for removing larger chips while allowing smaller chips and oil to pass therethrough. The buckets prevent the larger chips from damaging a surface of the filtering drum on which the smaller chips are collected.

Abstract: A device for removing screened or sifted material from liquid flowing in a gutter (1) has a sloping cylindrical grizzly (11) that is mounted in the gutter, that is partly immersed in the liquid, and that has a face that is open upstream and closed downstream. The device also has a conveyor (5) that is positioned coaxial to the grizzly, that leads to an ejection point (18) outside of the liquid, and that has a powered shaft (7) and a housing (6). The conveyor has an intake funnel (9) for the screened or sifted material in the vicinity of the grizzly. The device also has a separator (15) for the screened or sifted material positioned above the intake funnel. The grizzly (11) is rotated. The separator (15) is positioned stationary on the outside of the grizzly (11) and releases screened or sifted material that adheres to the inside of the grizzly.

Abstract: A cylindrically-shaped horizontal rotating unit which separates liquids from liquid-bearing materials, such as sludge or sewage, is the subject of this invention. After the liquid-bearing material is fed from a pipe onto a tray or head box located at the bottom of the feed end near the circumference of the unit, the material flows from onto the interior of the cylinder which contains bar screens around its circumference. The cylinder is rotated at variable speeds while the material is fed into it. When the cylinder is rotated liquids are drained from the material through bar screens contained around the circumference of the cylinder and into a drain pan below the cylinder thereby leaving the remaining material more solid. Additional features of this invention include interrupted pitched flights or blades protruding from the inside of the cylinder, which not only push the materials toward the discharge end of the cylinder but also roll the material end over end to remove even more liquid from the material.

Abstract: A shower pipe for a rotary drum filter has a square cross-sectional shape defined by top, bottom and side walls. The sidewalls and a pair of lengthwise-extending continuous diffusion flanges depending from the bottom wall of the pipe stiffen the pipe against sag for placement at a 12 o'clock position spanning the filter drum. The pipe is formed of fiberglass reinforced plastic in two longitudinally-divided hollow sections in a pair of mirror image, trough-like molds. Each section has a pair of interconnection flanges for mating the sections together. The interconnection flanges extend normally to the sidewalls to stiffen the pipe when the bottom wall of the pipe is vertically-oriented for placing the pipe at at 9 o'clock position along one side of the filter drum. Glass rods are secured in the interior corners of the pipe to provide diagonal rigidity, for placing the pipe at, e.g., a 10-11 o'clock position between the top and side of the filter drum.

Abstract: A filtration apparatus comprised of a rotary drum having a plurality of internal vanes for conveying slag material is presented. The slag is conveyed upwardly by the vanes, after which is falls freely onto a conveyer belt passing longitudinally through the drum. Deflectors guide the slag during its fall onto the belt. The deflectors are divergent and inclined relative to the direction of movement of the conveyer belt. The rotatable drum is axially subdivided into a plurality of sections, the vanes of each section being angularly offset in relation to the vanes of adjacent sections. The filtering apparatus herein effects uniform charging of slag material onto the conveyer belt.

Abstract: The present invention relates to a device for the separation of a liquid from a sludge (12) or a liquid containing particles by means of a rotatable drum (1), inside which an inlet device for the supply of a sludge (12) or of a liquid containing particles debouches, the jacket (3) of said drum exhibiting ports (2) for making said separation of liquid possible, the drum (1) in its interior exhibiting a screw-type flange element (11) for the forward feed of the sludge, which flange (11) follows the rotating movement of the drum, said flange (11) extending from the inside of the jacket (3A) of the drum in direction towards the center (13) of the same.The invention makes possible an effective supply of sludge (12) etc. to the interior of the drum and an effective separation of liquid from said sludge (12).

Abstract: A conveyor belt assembly is presented for use in conjunction with a rotary drum filtration apparatus, the conveyor belt passing longitudinally through the drum. The conveyor belt assembly comprises two movable frame sections and an associated conveyor belt. A first movable frame section is slidably mounted, preferably by rollers on rails, on the supporting framework whereby the conveyor belt may be moved between an operative position inside the drum and a retracted position outside the drum. The second movable frame section is pivotably mounted and is capable of pivoting upwardly into a raised position thereby providing a space for the first frame section to be slidably positioned thereunder. Preferably, a ramp means attached to the slidable frame section urges the second pivotable frame section upwardly to the raised position.

Abstract: A filtration apparatus comprised of a rotary drum having a plurality of internal vanes for conveying slag material therein therein is presented. The slag is conveyed upwardly by the vanes, after which it falls freely onto a conveyer belt passing longitudinally through the drum. Each vane consists of a retaining blade and a liquid permeable filtering blade spaced from the retaining blade. A deflecting means is positioned beneath the filtering blade. The deflecting means includes a deflecting plate associated with a support member. The support member and the retaining blade provide a supporting frame work for the rotary drum.

Abstract: Apparatus for concentrating solids from a solids/liquid mixture, particularly sludge from a waste stream/flocculating polymer mixture, includes a frusto-conically shaped drum. A solids/liquid mixture is introduced through a conduit into a large end of the rotary driven conical drum. A maximum amount of the free liquid in the mixture is released from the drum through its screen side wall near the large entrance end of the drum. The solids in the drum, after initial release of the liquid therefrom, are moved during their travel to the smaller exit end of the drum where the surface movement of the drum is slower. The resulting thickened or dewatered solids are removed from the smaller end of the drum as a formed cake or in the form of thickened sludge.

Abstract: A cleaning filter has a cylindrical tank through which an axial pipe extends, the pipe having a screw blade attached thereon and being rotatable in the tank. A drum rotatably carried on the axial pipe is disposed within the tank and around the screw blade, the drum having a cylindrical body and an end cover mounted on the cylindrical body such that the cylindrical body is rotatable relative to the end cover. The end cover has a cleansing agent inlet and a cleansing agent outlet with the cleansing agent being removed from the drum by rotating the pipe means and the screw blade, the latter engaging the cleansing agent in the drum to thereby move the cleansing agent axially to the cleansing agent outlet.

Abstract: A sieve apparatus containing a circular sieve or screen, possessing at a portion of its circumference an impervious region. The impervious region of the circular screen forms a trough in which there can be formed a liquid sump for washing the material which is to be treated. In the case of a circular sieve or screen, formed of perforated sheet metal, the impervious region can be free of holes or openings. If the circular sieve or screen is formed of a sieve or filter material, then the circular sieve is covered at the impervious region. Spray tubes or the like serve for spraying the circular sieve, the material which is to be treated and for forming the liquid sump.

Abstract: Molten slag is granulated with water to produce a granulated-slag/water sry that is fed into the bottom of a horizontally extending foraminous drum. This drum has radially inwardly extending vanes and is rotated to lift up the granulated slag and separate it from the water, discharging the slag onto a conveyor belt for storage or further use. The water running out of the slag slurry is recirculated for use in the initial granulation step for the molten slag stream.

Abstract: Molten slag is granulated with water to produce a granulated-slag/water sry that is fed into the bottom of a horizontally extending foraminous drum. This drum has radially inwardly extending vanes and is rotated to lift up the granulated slag and separate it from the water, discharging the slag onto a conveyor belt for storage or further use. The water running out of the slag slurry is recirculated for use in the initial granulation step for the molten slag stream.

Abstract: A disc press for continuous pressing of aqueous or suspended pulp for fractionating the pulp in a liquid fraction and a dry substance fraction, comprises two plane parallel pressing discs mounted for rotation about a shaft and having strainer plates which haul the pulp therebetween by friction. The press also comprises inner and outer pressing means extending between the pressing discs and together with the latter define a curved pulp passage which in the transport direction has a varying cross section and constitutes a filling or dewatering zone, a pressing zone and a discharge zone. The passage zones of the pulp passage combined extend throughout an angle which is less than 360.degree., and the filling or dewatering zone has an approximately constant cross section. The subsequent pressing zone (B) has a uniformly decreasing cross section, the centerline of the pressing zone following an arc having an approximately constant radius about the axis of rotation.

Abstract: A rotary strainer comprising a revolving box-like structure having a horizontal axis of revolution and a filtering net stretched around the external periphery of said box-like structure, wherein a mixture of liquid and solids is introduced into said box-like structure so as to primarily separate said solids and liquid by said filtering net, with the thus separated solids being dropped with rotation of said box-like structure onto a screw conveyor extending through the inside of said structure so as to discharge the separated solids out of the structure by said conveyor, and the bottom face of a screw conveyor chute provided below the screw is slanted downwardly toward the box-like structure so that the liquid adhering to the primarily separated solids will flow back toward said box-like structure by dint of said slant for further separation.