TREATMENT OF WATER IN OIL EMULSION AND DEVICE FOR TREATING WATER IN OIL EMULSION

摘要

PROBLEM TO BE SOLVED: To restore filtration performance by selectively permeating the water in oil emulsion through a hollow-fiber membrane toward the inner wall surface and permeating the permeating water through the membrane from the inner wall toward the outer wall when the filtration capacity is lowered. ;SOLUTION: A water in oil emulsion to be regenerated or discarded accumulated in an oil thickener 7 is supplied by a circulating pump 9 to the emulsion inlet 4 provided on the outer wall side of the porous hollow-fiber membrane 1 of a hollow-fiber membrane module 8 with the membrane set in a housing 2. The water in the emulsion contg. a surfactant, etc., is selectively permeated through the membrane 1 toward the inner wall of the membrane from the outer wall. The permeated water is passed backward through the membrane into a backwashing water tank 10, a part of the water is stored in the tank 10, and the overflow is supplied to a permeated water discharge port 12.;COPYRIGHT: (C)1999,JPO