DEVICE FOR PURIFICATION OF OIL-CONTAINING WASTE WATER Russian patent published in 1994 - IPC

FIELD: purification of oil-containing waste water. SUBSTANCE: device has initial water feeding pipe-line, hydrocyclone unit with upper and lower drainage collectors, settling chamber with units of withdrawal of separation products, and flotation chamber. Lower part of flotation chamber communicates with settling chamber, its upper part communicates with the chamber of incompletely purified water. Hydrocyclone unit is in the form of multicyclone. Lower drainage collector is in the form of chamber connected to settling tank by pipe-line. Lower drainage collector is positioned above chamber of incompletely purified water and communicates with it through branch pipes mounted coaxially under lower drainage units of hydrocyclones. Initial liquid feeding pipe-line has vertical section and is provided with gas collector. Upper drainage collector is in the form of pipe connected to flotation chamber and mounted coaxially with water feeding pipe-line. EFFECT: enhanced purification capability. 1 dwg