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WO/1990/014872A1 |
A system (11) for clarifying liquids, having particular utility in dry cleaning operations. The system includes a filter apparatus (25) connected to a washer (12), said apparatus includes housing (10), and a plurality of axially spaced f...
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WO/1990/015025A1 |
Disclosed is a method for purifying contaminated water containing heavy metal impurities, comprising the steps of directing a flow of the contaminated water through a first electrolytic oxidation chamber (26), comprising a plurality of e...
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WO/1990/014144A1 |
A laboratory filtration apparatus is described in which flow through the filter is measured as the filter is being used and then visually displaying an indication of the measured flow which is used to indicate the effectiveness of the fi...
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WO/1990/014311A1 |
A method of treating water with a precoated filter, wherein powdered cation- and anion-exchange resins and an ion-exchange fiber composed of an ion-exchange polymer and a reinforcing fiber are used as the precoating material, thereby dra...
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WO/1990/012919A1 |
A dewatering device for pulp suspensions, comprising a rotatable screening cylinder (1). In the screening cylinder a rotatable shaft (3) is located which is provided with a screw thread (7) for conveying the pulp through the screening cy...
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WO/1990/012635A1 |
The invention relates to a separator for regenerating used emulsions, especially of cooling lubricants but also cleaning solutions, with a discharge pipe (1) for the regenerated emulsion. The aim of the invention is to provide a separato...
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WO/1990/010490A1 |
A filter for continuous filtering of a suspension under pressure and/or vacuum includes a vessel (1) having a center axle (2) on which filter discs (3) are arranged at a distance from each other along the center axle. The filter discs co...
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WO/1990/010489A1 |
A filter for continuous filtering of a suspension under pressure and/or vacuum comprises a vessel (1) having a center axle (2) on which filter discs (3) are arranged at a distance from each other along the central axle. The filter discs ...
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WO/1990/009835A1 |
This invention relates to a flocculating apparatus which performs control so that the amount of addition of a flocculant can be optimized, and can minimize the water content of a dehydrated cake. The apparatus includes chemical charging ...
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WO/1990/008646A1 |
A pressure filter for liquid-solid mixtures comprises a filter element which is covered by a flexible membrane impermeable to liquid. The liquid-solid mixture is introduced into the space between the filter element and the membrane. A re...
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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/1989/009255A1 |
In a process for recovering oil from natural products, the raw material is size-reduced in a processing installation (1) and treated by cellular disintegration. The oil released thereby is emulsified by the addition of water. The oil/wat...
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WO/1989/009091A1 |
Process and arrangement for treating recirculated drilling mud during oil or gas drilling, in particular offshore and primarily when using oil-based drilling fluids, possibly water-based drilling fluids. The invention aims at the attainm...
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WO/1989/008618A1 |
A system for extracting moisture form sludge of the type handled by municipalities and industries is disclosed. The system involves the use of a feed line (14) where the sludge is mixed with a chemical treating agent adapted to achieve f...
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WO/1989/007972A1 |
Disclosed herein are a method and apparatus for removing liquid from a permeable material, such as slurries, sludges, porous solids and permeable foams. The method and apparatus illustrated generally at figures 1-4 involve constraining t...
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WO/1989/006154A1 |
This invention relates to an agglutination reaction vessel constituted of a cylindrical tank (1) having rotating agitation means (2) equipped with stirring blades (6a and 6b) at its center and a filtration tank (7) for filtering and rece...
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WO/1989/005185A1 |
A method of producing a filter cake from e.g. sewage sludge, comprises the steps of mixing the sludge with a flocculating or bonding agent and then passing the mixture at pressure into a filter chamber press, while measuring the flow rat...
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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/1989/003240A1 |
In a process for clarifying raw juice, the residue from a first cross-flow filtration device (2) is introduced into the residue side of a second cross-flow filtration device (6), the membrane surface (7) of the latter (6) having a greate...
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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/1989/000846A1 |
Tangential flow filtration is used in the size separation of particles, such as liposomes and lipid particles. These particles may be passed through a tangential flow filtration device of any pore size desired. Tangential flow filter sys...
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WO/1989/000073A1 |
In a coated filter for liquids, the filter cake formed on the filter candle (5) is dried by blowing compressed air into the dirt chamber (4) of the filter housing (1), thrown off by a mechanical movement of the filter candle (5), and rem...
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WO/1989/000074A1 |
An apparatus and process for removing liquid from a liquid-solid mixture by forcing the liquid-solid mixture under low pressure through filter means (74) attached to filter support doors (56, 58, 60, 62) to form a filter cake, supplying ...
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WO/1988/010239A1 |
A pump (6) sucks the water to be treated through an inlet strainer (27) and delivers it to a unit (1) containing stages for increasingly fine filtration. A reservoir mounted in a chamber (33) adjacent to the inlet strainer (27) contains ...
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WO/1988/007061A1 |
The invention relates to highly filterable polyvinyl polypyrrolidone particles and to the process for improving filterability of standard polyvinyl polypyrrolidone granules, wet cakes and slurries, which comprises heating granular polyvi...
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WO/1988/005334A1 |
Methods and apparatus for liquid filtration and in particular to the recycling of ''grey water''. It also includes related methods and flocculation agents. The apparatus (14) consists in a ''grey water'' inlet (18), an oil trap (19), flo...
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WO/1988/003049A1 |
A system for filtering particles from a gas flow medium comprises a substrate (22) on which a filter layer is provided. The latter is a filter liquid (36) which wets the substrate (22). At least one filter system (20) of this type is arr...
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WO/1988/003048A1 |
For dewatering waste water sludge, the sludge pre-treated with a flocculator is subjected to a pre-dewatering stage through superimposed travelling screens before being pressed. The pre-dewatered sludge up to about 20 % of dry matter is ...
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WO/1988/002655A1 |
A process for separating hydrocarbons from waste water, in particular aromatic hydrocarbons, by means of an absorbing filtering layer. The hydrocarbons dissolved and non-dissolved in the waste water are separated in a single stage. The w...
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WO/1988/000345A1 |
A method for qualitative and/or quantitative analysis of an analyte consisting of antigens, antibodies, microorganisms or other cels, in a liquid specimen. When analysing antigens or antibodies or small microorganisms, such as viruses, t...
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WO/1987/006841A1 |
A fluid purification system (20) includes an elongated ultraviolet radiation emitting tube (26) and independent fluid flow-controlling conduits (33, 34). Each conduit (33, 34) is transparent to allow ultraviolet light emitted by the tube...
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WO/1987/005005A1 |
The separation of solid particles from liquids, in particular the dewatering and thickening of sludge, a drainage unit (9) being employed. The drainage unit includes a container (10) which is permeable to the liquid, for example is scree...
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WO/1987/002267A1 |
Single or multiple blood plasma component concentrations are measured by a disposable stick (63) having one or more plasma component reactive areas (31, 91) covered by a semipermeable membrane (13) which is permeable to blood plasma or s...
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WO/1986/005413A1 |
Cross-flow filter (8) comprising a highly flexible filter support (21) (thickness not greater than 1 mm) having a spiral of, or spaced, parallel lengths, of, double-ply material whose plies are seamed together along spaced, longitudinal ...
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WO/1986/001427A1 |
Apparatus for removing suspended particles from water comprises outer and inner concentrically arranged tanks (1, 2) and a carriage (6) arranged on top of the outer tank (1) for movement around the same. Unclarified water is introduced i...
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WO/1986/000240A1 |
A device for automatic control of filter presses operation comprises a control unit which is connected through the filtrate conduit (2) to at least one filter press and which consists of a tube (4) connected to the conduit (2) and provid...
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WO/1985/004857A1 |
An organic fibrous material, prepared by pressure molding or moistening with water to increase the bulk density, and a high molecular flocculant are added to a sludge, and the resulting flocs are adjusted to 1 mm or less in diameter and ...
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WO/1985/004595A1 |
Known filters which operate according to the deep bed filtration principle present the disadvantage of having a filter resistance which increases together with the utilization duration. By using a filter operating according to the superf...
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WO/1985/003456A1 |
Process of recovering a constituent of a process effluent, such as an effluent of a process for making a preform from which an optical fiber is drawn. The effluent is directed into a scrubber (40) of a loop (20) where it is treated with ...
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WO/1985/003065A1 |
Nonionic surfactants based upon low molecular weight block copolymers of ethylene oxide and butylene oxide are particularly useful as low foaming dewatering aids in the processing (e.g., filtering, drying, etc.) of various mineral concen...
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WO/1985/002836A1 |
In the continuous process for dehydrating muds, the mud is previously treated by a flocculation agent as a function of the mud amount per time unit and is pumped to a chamber filter press (11) by means of a pump (12). In order to provide...
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WO/1985/000354A1 |
A process and apparatus for separating drilling mud and waste materials into pure water and a concentrated solid waste phase which is easily handled and disposed of. The process and apparatus provide for adjusting the pH of the drilling ...
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WO/1984/001313A1 |
A process for the recovery of solid materials from dilute dispersion of finely divided solid material, such as animal wastes, sewage, asbestos and coal, comprising adding to the dispersion an agglomeration agent capable of inducing flocc...
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WO/1983/003060A1 |
Method to spread a pulp of which the solid fraction has a d80 lower than 100 micrometers, for its natural drying. The method is characterized in that it comprises the following consecutive steps: a) adjustment of the proportion of solid ...
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WO/1983/002470A1 |
Method and apparatus in screening a fibre suspension in a pressure screen (10) with an inlet (1) for the fibre suspension and outlets (2, 3) for accept and reject, respectively, a conduit (12, 13) being respectively connected to said out...
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WO/1983/001969A1 |
In screening a fibre suspension, an accept and a reject are tapped off, tapping the reject being controlled by a valve (6). According to the invention, the pressure drop across the screening means is measured, and when this drop exceeds ...
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WO/1983/001014A1 |
A filtering process for obtaining a clear effluent filtrate from a turbid oil or gas well treatment fluid contaminated with solid particulates comprised of drilling and formation debris having particle sizes in the range of from about 0....
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WO/1983/001013A1 |
A unitary method and system for the continuous purification of a liquid medium containing solid particulate matter comprises: a conduit (13) for delivering a continuous stream of the liquid medium to a first separator (14) wherein partic...
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WO/1982/004198A1 |
Method at the preparation and application of precoat, comprising a precoat and water, at rotating vacuum filters comprising a rotating drum. According to the invention, water (B) is introduced into the drum interior, whereafter the preco...
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WO/1981/003484A1 |
Aqueous slurries of fine coal are dewatered by a process which comprises mixing an organopolysiloxane with the slurry, separating the slurry to recover the fine coal and further drying the fine coal, if desired. The use of water-soluble ...
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