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WO/1992/016294A1 |
A device (10) for separating liquid samples has a sample container (12), bottom wall (20) of which has an outlet opening (22) provided therein. The outlet opening (22) is joined by an outlet spout (24) extending in the axial direction of...
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WO/1992/015387A1 |
An elongated screen assembly, which in various forms, is useful as a scallop in a reactor, or as an underdrain for a gravity filter system, has a cross-section in a direction normal to its axis which is at least twice as wide as it is hi...
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WO/1992/014535A1 |
A method and apparatus is provided for filtering a fluid through a particulate filter medium (120) and for periodically scrubbing the filter medium (120) of accumulated contaminating material. During the filtration cycle, the filter medi...
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WO/1992/011917A1 |
A continuous process for the separation of small particles from larger particles in a biological preparation passes a liquid stream of the preparation through a first filter (102), which retains larger particles, passing smaller particle...
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WO/1992/007646A1 |
A method and a device for a liquid filtration, polluted liquid being fed into a filtration device (1) above a filter (28) and a portion of the filtrate, obtained in this way, being reversed for a counter flushing and thereby a cleaning o...
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WO/1992/006759A1 |
The invention relates to a method for washing a filter intended for cleansing a contaminated liquid and comprising a granular bed, a drainage system located beneath the bed, means for introducing first and second liquid flows into the be...
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WO/1992/006766A1 |
Rotary filter (10) including a perforated, rotatable drum (12) and at least one blowback valve (18) located in close proximity to the interior surface of the drum. In a preferred embodiment, the blowback valve includes an opening (40) ad...
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WO/1992/005855A1 |
A horizontal counter-top water filter adapted to reside behind a sink faucet fixture. The water filter has a horizontal housing (12) defining a fluid inlet chamber and a fluid filtration chamber, an inlet end cap (16) which is configured...
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WO/1992/004095A1 |
A filter apparatus (10) for filtering machine tool coolant is disclosed as including a filter assembly (12) including a foraminous non-reticulated metal screen (30) having minute openings and a smooth planar surface for providing improve...
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WO/1992/004099A1 |
A method of washing an upflow filter (12) between service runs employs a filter bed (26) having a non-buoyant particulate filter layer (56) through which influent to be filtered is directed in an upward direction, and through which liqui...
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WO/1992/002286A1 |
A method of treating liquids comprises passing the liquid upwardly through a vessel (7) having a permeable wall (9, 10) at each end and containing a buoyant granular filtration medium (8). During filtration, the filtration medium (8) is ...
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WO/1991/019555A1 |
A water purification system including both a filter and a body of biocidally active material for microbiologically purifying biologically contaminated water. The system provides for the production of microbiologically purified water duri...
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WO/1991/018658A1 |
Filtration apparatus comprises a column (1) having a lower liquid inlet (7), an upper liquid outlet (2), and an intermediate internal screen (4) adapted to confine a bed (5) of buoyant particles therebelow; means (8) adapted to cause liq...
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WO/1991/018836A1 |
Water clarifying apparatus (10) has a cylindrical tank (14) where particulate contaminants suspended in raw water are separated using floatation techniques. A set of concentric, mutually spaced, conical plates (24) positioned in the floa...
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WO/1991/013670A1 |
A liquid distributor for introducing flushing or rinsing liquid and liquid to be filtered into a granular filter bed and for removing filtrate from the bed. The distributor is intended for use in a filter for cleansing liquids and one or...
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WO/1991/012869A1 |
A two-chamber vessel (10) provides for separate treatment of a fluid stream with particulate solids. Separate means (18, 19, 20, 23) are provided to introduce and remove particulate solids into each chamber. Separate means (34, 36, 40, 4...
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WO/1991/012061A1 |
A liquid filter (11) has a housing (13) with a bottom and a top (17). A vertical partition (27) divides the housing into an inlet chamber (29) on one side and outlet chamber (43) on the other side. One type of filtration material is loca...
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WO/1991/011244A1 |
A precast concrete, plastic-jacketed filter underdrain block (20) for downflow filter units is disclosed. The jacket (26) functions as a mold for the concrete (36) and becomes an integral part of the underdrain block (20). Thus, lightwei...
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WO/1991/010624A1 |
This invention lies in the field of on-site sewage and wastewater treatment. Standard on-site septic systems require special soil and groundwater conditions with large lot sizes. This invention comprises a method and device for complete ...
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WO/1991/010493A1 |
A composite cartridge type filter (10) of the kind utilizing a hollow cylindrical body of bonded activated carbon (12) and an interior filled with a particulate filter media bed is disposed within a housing (11) such that raw unfiltered ...
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WO/1991/009661A1 |
Method and apparatus for the discharge of the filter cake out of a filter apparatus, whereby the filter cake is conveyed towards a discharge shaft to fall down into it, and whereby, when the cake reaches a certain height within the shaft...
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WO/1991/008817A1 |
A liquid treatment tank (1) with a liquid inlet (2) contains a layer of components (4) having buoyancy in the liquid. During treatment the liquid is directed so that it premeates through the layer. During treatment the layer is stabilise...
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WO/1991/008818A1 |
The present invention discloses an apparatus for filtration of liquid, wherein a granular filter medium forming a filter bed (FB) in a filter tank (1) moves downwards, while the liquid to be filtered is introduced into the lower part of ...
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WO/1990/014313A1 |
A method and apparatus for purifying contaminated water using a filtering medium, which is directed to preventing effectively clogging of the filtering medium. This object can be accomplished by forming water streams inside circulation p...
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WO/1990/006161A1 |
A filtering device for the filtration of a fluid, consists of a container (1) having a fluid inlet (11) and a fluid outlet (13) and accommodating therebetween a particulate filtering material (2). A first fluid-permeable unit (16) is loo...
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WO/1990/003230A1 |
A solid waste retrieval device (11) utilizes a rotating drum (26) carrying a plurality of teeth (37) to lift dried sludge from an underlying sand bed such that substantially no sand is removed with the sludge. The device moves over the s...
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WO/1989/011323A1 |
The invention relates to a process for efficiently recovering crystals from slurry for a long time by feeding a slurry to a rotary vacuum filter, filtering with suction while rotating a cylindrical filtering member, washing and again fil...
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WO/1989/011322A1 |
A filter element with a closed central pipe (2) comprises a plurality of hollow cylindrical filter means (1) connected via pipes (8) to a cylinder (4) surrounding the central pipe (2). The filtrate is discharged through the central pipe ...
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WO/1989/007003A1 |
A thickener for fiber suspensions and the like includes a plurality of rotatable filter disks (3) mutually spaced in axial direction and being adapted to be partially submerged in a liquid or suspension (5) to be filtered. Each filter di...
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WO/1989/003239A1 |
The invention concerns a method of and a plant for purifying water in an open, solid filter bed (17) in which, after the addition of chemicals, the water to be purified is passed through a filter bed, said filter bed being regenerated by...
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WO/1989/002776A1 |
A stream of contaminated liquid flows into a vessel, through a filter media comprised of at least 50 % pecan hulls, while clean liquid exits the vessel, leaving the contaminants deposited on the filter media. The deposited contaminants a...
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WO/1989/001816A1 |
Apparatus for use in a water clarification system (10) which removes particles from the clarified water. The apparatus includes a screen (38) which is positioned in a clarified water storage area (34) between the inlet (34A) and the clar...
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WO/1989/001814A1 |
The object of the invention is a filtration plant for processing of water, to which filtration plant belong a filter basin (1) and a filtering material layer (2), favourably a sand layer, through which the water to be purified is arrange...
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WO/1989/000977A1 |
A filter cartridge assembly incorporating a filter medium arranged between upper (4) and lower (5) pads of light, fluffy, loosely, packed fibrous matter comprising commingled, non-woven fibers of significant length relative to their diam...
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WO/1989/000976A1 |
Water purification is performed in a simplified manner within a vessel (10) having at least the lower portion thereof filled with a filtration media such as activated carbon (12). A spout (13) is provided near the upper end. A filter med...
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WO/1988/008324A1 |
A filtering device (10) includes a head (12) intended to be permanently installed in a fluid dispensing machine and a disposable canister (14) therefor. A central chamber (34) is formed in the head which chamber is in communication with ...
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WO/1988/008475A1 |
A universal swimming pool water filter apparatus for a bottom opening tank (10) comprising multiply useful dual reverse flow port means (26, 28) and cooperating filter medium support (32) having various filtered water passing openings (4...
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WO/1988/007887A1 |
Method in a suction dryer (10), which comprises a basin (12) for the suspension to be suction-dried, in connection with which said basin one or several filter-plate discs (14a) revolve, onto whose faces a filtrate cake is gathered and de...
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WO/1988/006479A1 |
The present invention relates to an arrangement for an inlet pipe (2) in a rotating drum sieve for the supply of sludge (3) or a liquid mixed with particles to the inside of the rotating drum sieve, which drum sieve exhibits flow opening...
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WO/1988/004951A1 |
A filter device for removing contaminants from liquid flowing therethrough comprising a vessel having an inlet for providing a contaminated liquid flow into the interior thereof and an outlet through which filtered liquid can exit the ve...
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WO/1988/004194A1 |
A fluid filter is formed by manufacturing an air laid batt containing randomly disposed structural fibers and a thermoplastic binder fiber. The interstices between the fibers are fixed by applying a latex resin to the batt, thereby fixin...
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WO/1988/003433A1 |
An arrangement for an inlet and an outlet in a rotating drum sieve (2) for the separation of solid particles from a liquid (6) mixed with particles, which drum sieve comprises a drum casing provided with a sieve opening and a feed screw ...
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WO/1988/002045A1 |
A system is disclosed for processing materials, in particular a material or fabric web, passing between at least two permeable endless belts e.g. screening belts or similar conveyor means, in particular for displacement washing of filter...
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WO/1988/001896A1 |
A method for purification of liquids, particularly water, by filtering the liquid through a filter consisting of a bed of particulate filtering mass (54) in a filter vessel (50), which filter is purged of collected impurities by supplyin...
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WO/1988/002044A1 |
A system is disclosed for processing materials, in particular a material or fabric web passing between at least two permeable endless belts e.g. screening belts or similar conveyors in particular for displacement washing of filter cakes ...
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WO/1988/002046A1 |
A system is disclosed for processing materials, in particular a material or fabric web, passing between at least two permeable endless belts, e.g. screening belts or similar conveyor means, in particular for displacement washing of filte...
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WO/1987/006962A1 |
The arrangement comprises an endless liquid pervious belt (1) for receiving a pulp layer (7). Above the belt, means (11) for the supply of treatment liquid are located. Each supply device (11) comprises a feed pipe (16) and a distributio...
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WO/1987/005823A1 |
A dewatering method and apparatus which uses a ramp at one end of a perforate conveyor in which the incline of the ramp may be adjusted while the dewatering operation is taking place. The ramp is also capable of being completely lifted o...
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WO/1987/005824A1 |
A rotating filter apparatus having a stack of sintered filter discs mounted on a vertical, rotatable hollow shaft and located within a chamber, the shaft having a plurality of radial openings therein to the hollow bore of the shaft. Unfi...
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WO/1987/003821A1 |
The device comprises a hermetic annular casing (1) in the cavity of which is mounted a flexible filtering element (2) of toroidal form. The casing (1) is provided with shutters (5) dividing the cavity of the casing (1) into two areas (6,...
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