Abstract:
Bei einem Verfahren zur Filtration von Flüssigkeiten, insbesondere von biologischen Flüssigkeiten, wird ein Filter (1) in einer Phase der Voranschwemmung mit Filterhilfsmittel angeschwemmt. In einer anschliessenden Filtrationsphase wird Unfiltrat unter Zugabe von Filterhilfsmittel filtriert. Das Filterhilfsmittel bildet in der Phase der Voranschwemmung und in der Filtrationsphase einen Filterkuchen. In der Phase der Voranschwemmung wird Filterhilfsmittel angeschwemmt, bei dem der Anteil an regeneriertem Filterhilfsmittel 30 %, insbesondere 0 %, ist. In der Filtrationsphase wird Filterhilfsmittel zugegeben, das überwiegend, insbesondere nahezu vollständig, aus regeneriertem Filterhilfsmittel besteht. Das regenerierte Filterhilfsmittel ist dabei mit einem Medium im Bereich des gesamten pH-Wert-Spektrums behandelt.
Abstract:
A liquid filtering device of the type comprising a pack of cylindrical filter member discs (70) with an arrangement for reversed, filter flushing flow cycles. An integrally formed filter core member (24) is provided comprising tubular nozzled conduits (30a, 30b, 30c) so that water under pressure within the conduits becomes discharged in jet forms to enable free rotation of the filter discs. One-way valve (90) in the form of funnel-shaped rubber sleeve allows the flow of filtered water to the outlet port (20) but impedes the flow of flushing water from the outlet port through the filter member (70) in the direction of the inlet port (16).
Abstract:
A filter system for filtering solids includes a filtration tank for receiving a slurry containing the solids to be filtered. A filter assembly including a plurality of filter cells each having a filter medium at an exterior and a cavity at an interior is lowered into the filtration tank using a transport device carrying the filter assembly. A vacuum transfer system is connected to the filter assembly so as to transfer a vacuum to an interior of the filter cells. The vacuum transfer system is operable to perform the filtering and to retain the filtered solids while the transport device moves the filter assembly relative to the filtration tank.
Abstract:
Filtration net washing method characterizes in that the medium passes through a filtration net (7), according to the filtration direction, and after cleaning it is directed to a clean medium outlet (9) and partially compressed, preferably with a pump (2), which is preferably integrated with a filter, and then after the compression it is reversed to the inside of the filter preferably with a lengthened rotary mechanism (5), driven rotary with an electric motor (2a) and/or an integrated pump (2), not touching the filtration net (7), the said mechanism being hollow inside, which through at least one washing ending (12) jets the medium on that net from inside to outside, the touch area of the medium stream with the filtration net (7) is small and is from 0,1 mm 2 to 1 cm 2 , the net (7) washing medium pressure is higher than the filtration pressure in the filter, being up to several hundreds bars, preferably 3-20 bars, the rotary speed at washing medium application being from several rotations/min. up to 10000 rotations/min., preferably 3500 rotations/min., and the process of filtration net (7) washing is conducted without switching off the filter. Filter for using the filtration net washing method, comprising elements with a dirty medium inlet, a clean medium outlet, a sewage outlet and a washing medium inlet, characterizes in that the filter has a lengthened rotary mechanism (5) not touching a filtration net (7) and hollow inside, driven by a power source (2 and/or 2a), passing through a pressure chamber (1), a collecting chamber (3) and a filtration chamber (6), arranged in different order, which mechanism through at least one washing ending (12) jets the medium on that net from inside to outside, and the filtration net (7) length is smaller than the filtration chamber (6) length, the lengthened rotary mechanism (5) is a rotary shaft of a medium compressing pump (2) or of an electric motor (2a), the washing ending (12) is a small aperture, a jet nozzle or a nozzle with an aperture, through which aperture the medium passes at an angle to the shaft (5) rotation axis, and the size of the washing ending (12) is preferably 0,5mm to 1 cm, and the rotary shaft (5) on its length between the pressure chamber (I) and the filtration chamber (6) has a non-through axial hole (5a) and at least one washing ending (12).
Abstract:
Die Erfindung betrifft einen Filter für die Reinigung von Wasser, wobei das zu reinigende Wasser einer als Schmutzseite bezeichneten Seite eines Filterelementes (30) zugeführt und als gefiltertes Wasser aus einem als saubere Seite bezeichneten Ausgangsraum (38) des Filterelementes weggeführt wird. Für die Reinigung des Filters wird dem Ausgangsraum Druckluft 7ugeführt. Das Volumen des Ausgangsraums wird mittels eines Verdrängungskörpers (36) klein gehalten.
Abstract:
Die hier vorgestellte Erfindung betrifft ein Verfahren und eine Vorrichtung zur Fest/Flüssigtrennung von feststoffhaltigen, flüssigen Medien.
Abstract:
Improved self-cleaning filter comprised of a body (1) with an inlet (2) for the water towards an enveloping chamber (5), a filtering element based on a plurality of grooved discs (10), an axial passage (14) inside said discs and an axial outlet (9) for cleaned water. The filtering element (10) is terminated at its lower end by a valve plate (11) which closes the axial passage (14) in the return of water during the washing, thereby forcing the water to pass through side collectors (15) which not affected by the valve plate (11) and wherein are provided water outlet gates (16) which are oriented obliquely in the lateral direction in order to rotate the discs (10) during the cleaning operation, said gates being also oblique in the vertical direction in order to favour the spacing between discs (10), said gates being arranged helically (15); the tower (6) supporting the discs is terminated by a retractable piston (21).