METHOD FOR CLARIFICATION OF INDUSTRIAL WATER AND DEVICE FOR ITS EMBODIMENT Russian patent published in 1996 - IPC

FIELD: clarification of industrial water. SUBSTANCE: method for clarification of industrial water includes introduction into industrial water of flocculant solution, saturation it with air bubbles, flotation separation of aerofloccules, oil products, surfactants and oily substances, and separation of solid particles and sludge floccules by their precipitation in water medium. Separation of solid particles and sludge floccules by precipitation is carried out after flotation separation of aerofloccules. Precipitation and flotation separation are carried out in adjacent zones of one chamber conjugated as communicating vessels. Saturation of industrial water with finely divided air bubbles is effected by pneumohydraulic aeration. Separated from frothed product obtained by flotation is water phase containing surfactants. Water phase is used in aeration. During separation of water phase, frothed product is treated with live steam or hot air. EFFECT: higher efficiency. 7 cl, 4 dwg