Filter device for clarifying contaminated liquids

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 33/21 (2006.01) B01D 35/26 (2006.01)

Patent

CA 2421115

The filter device (1) is especially used for mechanical cleansing of waste water and for water treatment. It is rotationally arranged in a container (2) and surrounded by the liquid to be filtered. The filter device (1) comprises several filter elements (4) which are arranged at a distance from each other, form segment-shaped filter modules (3) and are assembled to form a rotary filter. The individual filter elements (4) consist of filter plates which are used to divert the filtrate and which are provided with filters on both sides. The aim of the invention is to prevent solids from adhering to the filters during the filtering process. This is achieved by providing the rotary filter with a hollow area (14) that is connected to the container (2) via a suction inlet and which is sealed by means of a carrier plate (6) for the filter segments, and also by making the hollow area (14) cooperate with a flow member. A pump blade wheel is used as a flow member. Preferably, the pump blade wheel (15) is driven via the rotary filter.

L'invention concerne un dispositif de filtration (1) qui est en particulier utilisé pour la purification et le traitement mécaniques des eaux usées. Ce dispositif de filtration est monté rotatif dans un réservoir (2) et entouré par le liquide à filtrer. Ce dispositif de filtration (1) est constitué de plusieurs éléments de filtration (4), placés à une certaine distance les uns des autres, qui constituent des modules de filtration (3) en forme de segments et sont assemblés pour former un filtre tournant. Les éléments de filtration (4) individuels sont constitués de disques filtrants par l'intermédiaire desquels le filtrat est dévié et qui sont équipés, de chaque côté, de filtres. L'objectif de l'invention est d'éviter que, pendant le processus de filtration, des matières solides adhèrent aux filtres. Cet objectif est atteint par le fait que le filtre tournant est pourvu d'une cavité (14) qui, d'une part, est reliée au réservoir (2) par l'intermédiaire d'une ouverture d'aspiration (12), et, d'autre part, est fermée par un disque de support (6) portant les segments de filtration, et que ladite cavité (14) est en liaison active avec un élément d'écoulement, à savoir une roue à aubes de pompe (15). De préférence, cette roue à aubes de pompe (15) est entraînée par l'intermédiaire du filtre tournant.

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