| 摘要 |
FIELD: waste water treatment. ^ SUBSTANCE: invention relates to chemical mechanical engineering field and is intended to local treatment of strongly polluted waste waters containing petroleum derivatives, fats, suspended substances, metal hydroxides, synthetic surfactants, organic, and other types of contaminants. Flotation treatment installation comprises, within a closed hydraulic system, (i) hydraulic recirculating unit composed of pump assembly with suction and pressure lines, water-an-air ejector, and upright saturator, and (ii) flotation treatment unit. Saturator is provided with water-air mixture supply pipeline coming out of top part of saturator and connected through nozzle to two-zone device attached from outside to body of flotation treatment unit. From bottom part of saturator, pressure stream distributor with two diverting pipes is led out, said diverting pipes being connected to liquid ejector of second chamber of flotation unit and to ejector of hydraulic recirculating unit. Two-zone device is waste water receiver in the form of wire basket communicating with first chamber of flotation through holes. Flotation treatment unit is structurally made in the form of cylindrical body transforming into truncated cone in its lower portion. Inside the body, flat-bottom cylindrical container with segment-shaped slot in its bottom is axially disposed to form second flotation chamber. First flotation chamber is represented by space between inside surface of body of the flotation treatment unit and outside surface of the second flotation chamber. In bottom portion of the second flotation chamber, there is a tubular distributive collector disposed and overflow pipe with head wall and scraper sludge remover are disposed axially in the same chamber. Between overflow pipe and inside cylindrical surface of the second flotation chamber, there is cylindrical barrier disposed to separate second flotation chamber space into two zones. Spaces of the first and second flotation chambers are traversed by sludge chute. ^ EFFECT: increased degree of flotation purification of waste water. ^ 2 cl, 4 dwg, 1 tbl
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