Machine for micro-filtering solid particles suspended in a...

B - Operations – Transporting – 01 – D

Patent

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B01D 33/073 (2006.01) B01D 33/15 (2006.01)

Patent

CA 2338483

A machine for micro-filtering solid particles suspended in a liquid stream comprising: rotating coaxial filtering discs horizontal and normal to flow direction and at least a partially cylindrical wall defining with rims of the discs, a hydraulic sealing coupling enclosing the liquid treating space. Each disc has one or more washing ramps outside said treating chambers with nozzles throwing water against the disc at a portion emerging from the treating chamber. The water is collected by a conveyance channel and feed back to an upstream purification plant. A collecting chamber between the discs has a bottom wall defining an upper limit of the treating chamber, the discs having filtering surfaces comprising textile fabric with micro-perforations. Sealing means are between the peripheral rims of the discs and the partially cylindrical wall. This arrangement prevents loss of hydraulic pressure within the treating chamber and allows the flow rate of the treated liquid to increase.

Machine de microfiltration de particules solides en suspension dans un filet de liquide comprenant les éléments suivants : disques de filtrage coaxiaux rotatifs horizontaux et normaux par rapport à direction d'écoulement, et au moins une paroi partiellement cylindrique formant, avec les jantes des disques, un accouplement d'étanchéité hydraulique enferme l'espace de traitement des liquides. Chaque disque comporte une ou plusieurs rampes de lavage hors desdites chambres de traitement, avec des buses projetant de l'eau contre le disque au niveau de la partie émergeant de la chambre de traitement. L'eau est recueillie par un canal d'adduction et renvoyée à une station de traitement d'eau en amont. Une chambre collectrice entre les disques comporte une paroi inférieure formant une limite supérieure de la chambre de traitement, les disques étant munis de surfaces de filtrage comprenant une toile de textile avec des microperforations. Des dispositifs de scellage se trouvent entre les jantes périphériques des disques et la paroi partiellement cylindrique. Cette disposition empêche toute perte de pression hydraulique à l'intérieur de la chambre de traitement et permet une augmentation du débit du liquide traité.

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