Effluent purifying plant with centralized structure

Details Effluent purifying plant with centralized structure Effluent purifying plant with centralized structure

B - Operations, Transporting

01

D

B01D 21/00 (2006.01) C02F 1/52 (2006.01)

Patent

CA 2600030

The invention concerns a plant comprising, on a vertical axis, a homogenizing vessel (1) followed by a settling vessel (2) and a flocculating vat (3). The homogenizing vessel (1) is fed by tangential intake (92) of the effluent and the input (611) and the output (612) of the upper tube (61) comprise a helical guide (613, 614) for driving the effluent in rotation. The lower tube (62) of larger diameter than that of the upper tube (61) is terminated by an outlet in the form of an upside-down cone (622) with reduced cross-section (621). The lower portion (31) of the flocculation vat (3) is truncated, with an apex angle, smaller than that of the upper portion (32), said lower portion (31) being parallel to the cone of the outlet of the lower tube (62), and anti-backflow cones (7, 8) surround the conduit (6) in the settling vessel (2).

Installation comprenant, sur un axe vertical, une cuve d'homogénéisation (1) suivie d'une cuve de clarification (2) et d'un bac de floculation (3). Un conduit (6) relie la cuve d'homogénéisation (1) à la partie basse du bac de floculation (3). L'alimentation de la cuve d'homogénéisation (1) se fait par une arrivée tangentielle (91) de l'efïluent et l'entrée (611) et la sortie (612) du tube supérieur (61) comportent un guide hélicoïdal (613, 614) de mise en rotation de l'efïluent. Le tube inférieur (62) de diamètre supérieur à celui du tube supérieur (61) se termine par une sortie en forme de cône renversé (622) de section réduite (621). La partie inférieure (31) du bac de floculation (3) est tronco-nique, d'angle au sommet, inférieur à celui de sa partie supérieure (32), cette partie inférieure (31) étant parallèle au cône de la sortie du tube inférieur (62), et des cônes anti-refoulement (7, 8) entourent le conduit (6) dans la cuve de clarification (2).

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