Plant for treating water by flotation has capture modules set at a distance from perforated recuperator intake

摘要

The plant has a flotation cell (10) fed with flocculated untreated water mixed with micro-bubbles produced by a pressurization expansion system (11) and equipped with a perforated recuperator intake (13), designed so that the surface of the flotation cell is traversed by an identical and uniform flow of water to be treated. The plant incorporates capture modules (14) that are positioned in the flotation cell so their lower edges lie at a distance (h) from the recuperator to avoid peturbation of uniform distribution created by the perforated intake. The distance (h) is preferably between 0.15 and 0.6 m, while the height or thickness (E) of the capture modules is preferably between 0.2 and 0.7 m. The modules are of lamellar type with a tubular or hexagonal profile, with a direct or crossing flow or, in a variant, having a bi-directional water flow for the water being treated.