PRESSURE FLOTATION PLANT Russian patent published in 1995 - IPC

FIELD: treatment of liquids. SUBSTANCE: pressure flotation plant comprises flotation, settling and filter chambers in the form of a container with internal circular and cylindrical partitions. It also comprises a device for the delivery of water-air mixture provided with an ejector. The base of cylindrical partition is connected to the wall of the flotation plant chamber while its upper end face has an inclined chamfer forming a crescent slot between partition and flotation chamber and disposed on the opposite side from the cleaned liquid discharge pipe. Installed inside the cylindrical partition under the chamfer is an internal funnel with a diffuser in the bottom, positioned above the inlet pipe. A twisting blade-type device is installed in the middle of the funnel. An inclined plate secured on the wall of the flotation plant above the chamfer prevents swirling of liquid in the settling chamber. A distributor in the form of a collector from open-pore tubes is installed above the cylindrical partition. Said tubes are connected to a line of compressed air which ensures more effective saturation of liquid with air. The foam formed on the surface of floated liquid holds the suspended articles and entrains them into the flotation chamber where it is divided into long-life foam which is discharged through a pipe from the flotation plant in the form of flotation concentrate, and short-life foam. The latter passes through a perforated partition into the lower part of the filtering chamber and returns into the suction pipe of the ejecting device. EFFECT: improved design. 3 cl, 2 dwg