Device for removing material screened or filtered out of...

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 35/28 (2006.01) B01D 29/03 (2006.01) B01D 29/64 (2006.01) E03F 5/14 (2006.01)

Patent

CA 2198006

A device is disclosed for removing solids from liquid flowing along a channel (3), in particular in sewage treatment facilities. It is provided with a separator surface (8), in particular a vertical surface which is partially submerged in the liquid and takes the form of a cylindrical jacket, is composed of stationary at least approximately semicircular bars (10) with a clearing arm (12) which is driven to rotate about the axis (2) of the separator surface (8) and has clearing elements (15) which poke through between the bars (10) from the inside outwards, and with a conveyer device (17) adjoining the separator surface (8) and leading to a discharge point outside the liquid for the solids. The conveyer device has a tubular housing (22) with a recipient aperture (23) for the solids and a driven conveyer screw. The convex side of the stationary and at least approximately semicircular bars (10) which form the separator surface (8) face the flow direction (5) of the liquid entering the gutter (3), ensuring that the solids are deposited on the outer stationary separator surface (8). The clearing elements (15) on the driven clearing arm (12) protrude between the bars (10) against the direction (29) of passage of the liquid. The section of the cylindrical jacket (9) not taken in by the approximately semicircular bars (10) is open. The conveyer device (17) is set into the channel (3) obliquely.

Ce dispositif sert à enlever des matières à éliminer d'un liquide qui s'écoule dans une rigole (3), notamment dans des installations d'épuration. Le dispositif comprend une surface d'élimination (8) notamment verticale, de forme cylindrique, partiellement immergée dans le liquide et constituée de barreaux fixes et mutuellement espacés au moins approximativement semi-circulaires (10). Au moins un bras de raclage (12) entraîné en rotation autour de l'axe (2) de la surface d'élimination (8) comprend des éléments racleurs (15) qui passent de l'intérieur vers l'extérieur entre les barreaux (10). Un convoyeur (17) de matières à éliminer, pourvu d'un boîtier tubulaire (22) avec une ouverture (23) pour les matières à éliminer et d'une vis sans fin entraînée, est adjacent à la surface d'élimination (8) et mène à une zone de distribution située à l'extérieur du liquide. La face convexe des barreaux fixes (10) au moins approximativement semi-circulaires de la surface d'élimination (8) est orientée dans la direction du liquide arrivant dans la rigole (3) dans le sens d'écoulement, de sorte que les matières à éliminer s'accumulent du côté extérieur de la surface fixe d'élimination (8). Les éléments racleurs (15) sur le bras entraîné de raclage (12) s'étendent entre les barreaux (10) de la grille en sens opposé au sens de passage (29) du liquide. La partie de l'enveloppe cylindrique (9) qui n'est pas occupée par les barreaux approximativement semi-circulaires (10) de la grille est ouverte. L'axe du convoyeur (17) est incliné lorsqu'il est placé dans la rigole (3).

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