METHOD AND APPARATUS FOR CLARIFICATION OF LIQUIDS, IN PARTICULAR WATER, SATURATED WITH MATERIAL IN THE FORM OF SUSPENSION Russian patent published in 2006 - IPC C02F1/24 C02F1/52 B03D1/14 C02F103/04 

FIELD: method and equipment for physicochemical clarification by flotation of water saturated with material in the form of suspension.

SUBSTANCE: method involves stage of static flocculation with descending flow, said stage comprising the step of primary separation of heavier particles, with zone where primary separation of heavier particles is performed being positioned under zone, wherein static flocculation step is performed, and including removal of heavier particles, with settling velocities of heavier particles held at this stage of static flocculation/primary separation being lower or equal to settling velocities of floated particles, and flotation step, during which step light particles are removed, with settling velocity of light particles being lower than cutoff threshold of settler. It is preferable that before flocculation step, high-energy mixing step be provided, said step being combined with introduction of one or number of reactants, such as coagulant or flocculant. Apparatus for effectuating said method according to any version comprises static flocculator equipped with deflectors and cutoff devices, lamellar settler positioned directly under static flocculator, and flotation unit with high pressure-expansion system designed for generation of bubbles for flotation of lighter particles, said parts of apparatus being arranged in one and the same volume. Apparatus is further provided with one or number of mechanical flocculation cells, which are supported during mixing process and into which flocculant is injected. Cell is positioned between coagulator and static flocculator-lamellar settler.

EFFECT: provision for optimal quality of clarification with the use of flotation treatment of water containing floatable and non-floatable particles, compact construction and provision for preventing formation of bottom sediment in flotation unit.

6 cl, 5 dwg