METHOD AND APPARATUS FOR OIL-WATER SEPARATION

摘要

PURPOSE:To improve the sepn. efficiency of oil and water by removing coarse oil drops from raw water contg. an oil-component in a gravity sepn. chamber, roughly separating the oil-component therefrom in a fibrous layer for forming the coarse grains of the oil-component and passing the water further through an oil-repellent porous film. CONSTITUTION:The raw water supplied from a raw water supplying pipe 5 enters the gravity sepn. chamber 3 where the sludge in the raw water is settled and separated. The sludge is discharged from a sludge discharge pipe 30. The coarse oil drops in the raw water are removed by flotation. The water flows through a through-hole 6 into a cylindrical partition body 4 where the oil drops are further removed by the flotation. The water is then passed through the fibrous layer 9 for forming the coarse grains of the oil-component. The small oil drops flocculate and grow to the coarse oil drops which are removed by the flotation. The water flows from an inflow hole 17 of a header 18 into the inside of the porous film 13. The microoil drops on the surface of the porous film are flocculated by the oil repellent effect of said film to form the coarse oil drops which are removed by the flotation. The treated water after the fine sepn. of the oil-component is discharged from an outlet pipe 12.