Patent RU-94036186-A (RU)
Inventor: LAKINA T A
IPC: B01D17/04
Filed: 1994-09-27
Abstract: FIELD: oil preparation and refinery, other branches of industry. SUBSTANCE: physical chemical model of separation of any emulsions, for example, water-oil emulsions, is based on coalescence of finely emulsified particles of oil on oleophilic threads with following their separation from water on hydrophobic semipermeable fibrous membrane. Final purification of water is exercised by its passing through hydrophilic fibrous semipermeable membrane. Method is realized by apparatus, that is cylindrical body made in the form of communicating vessels with central tube filled with coalescent member made as bundle of fibers. Mounted in the body partition serves as semipermeable fibrous membrane impregnated by dispersion medium (for example - water). In the case particles of dispersed phase (for example, petroleum or oil) are left on boundary of separation without penetration inside fibrous membrane and are washed out by counter flow of pure water. Apparatus for realization of the method is cylindrical body made in the form of communicating vessels ( for example, of V-shaped form) (1) with located inside it central tube (2) - tube inside tube. One end of central tube is inlet branch pipe (3) for emulsion, another one located inside right bend of V-shaped body is ended with flat lattice (4). Inside central tube there is coalescent member (5) made in the form of long bundle of fine olephilic fibers (of fishing thread type). One end of the bundle is protruding out of inlet branch pipe (3) and another one is rising over lattice (4) and going into nonwoven fibrous material of olefin threads (6), that is laid on lattice (4) and filling free volume of body over it. Left bend of V-shaped body (1) is also filled with fibrous hydrophobic material (7) laid on lattice (8). Left bend of body (1) has outlet branch pipe (9) for separated from petroleum or oil water and right bend has outlet branch pipe (10) for separated from water petroleum and oil. Apparatus is operating in following way (Fig. 1). Emulsion through branch pipe (3) is coming in central tube (2) filled with coalescent material (5). Passing vertical parts of central tube, emulsified big particles of hydrophobic phase (for example, petroleum or oil) are adsorbing on oleophilic fibers and, coalescing on their surface, are running down along them as on guides. In bend of central tube particles of hydrophobic phase , that have smaller density in respect to dispersion medium and caused by it smaller speed, will be grouped in upper part of tube section, so improving conditions for their adsorption and coalescence on olephilic fibers. Hydrophobic phase after passing the bend is under action of liquid column hydrostatic pressure rising up along olephilic fibers till lattice (4), on which fibrous nonwoven material of semipermeable membrane is located, and after filling of body volume over lattice (4) is running out of outlet branch pipe (10). Water through holes in lattice (4) pours down and having filled body volume before and over lattice (8), on which hydrophobic fibrous material (7) is located, is pouring out of outlet branch pipe (9). Particle of hydrophilic phase, that got in left bend of V-shaped body, are collected at lattice (8) without penetration inside volume of hydrophobic fibrous material (7). In the case concentration of hydrophobic phase at branch pipe 9(0 outlet is no more than 0.2 mg/l. EFFECT: increased productivity and improved quality of separation.