FLOTATION PLANT FOR WATER TREATMENT, MAINLY OF PROCESS AND WASTE WATER

摘要

The invention relates to treatment of industrial, process and waste waters from oil products, dispersed oils and mechanical impurities, in particular, to flotation plants for use in chemical and oil-refining industries. The technical result is aimed at enhancement efficiency of processing process and waste water with any content of oil-products, dispersed oils and mechanical impurities therein by providing uniform distribution of air stream over the entire cylinder cross-section and simultaneous creation of variously-sized air bubbles. ESSENCE: a flotation plant comprises a flotation column consisting of a vertical cylinder and air-preparation unit connected therebetween by a cellular block, according to the invention the plant further comprises a mixing capacity with input branch pipes for water to be processed and a floating reagent with an output branch pipe to discharge the mixture to the floatation column, wherein as said cellular block the flotation column comprises a separating element made from porous material and the air-preparation unit comprises an air duct embodied as a perforated pipe laid horizontally. In preferred embodiments the separating element can be manufactured as a packet having at least two layers of porous material with pores being 50-100 microns, the perforated pipe is laid horizontally as a spiral or as random turns and all holes in the perforation pipe of the air-preparation unit are oriented in one direction, mainly downward, the air-preparation unit is embodied as an almost hemisphere and the reagent comprising aminomethylenphosphonic acid as sodium salts is used as the flotation reagent.