APPARATUS FOR SEPARATING FLUIDS INTO TWO FRACTIONS BY MEANS OF SEMIPERMEABLE MEMBRANES

摘要

An apparatus for separating liquids into two fractions by reverse osmosis or ultrafiltration comprising a stack of alternating membranes and membrane supports, said stack having two spaced longitudinally extending holes with a bolt inserted in each hole so as to form annular flow passages extending along the surfaces of said bolts, closing discs being provided at suitable levels on each bolt so as to stop the flow of liquid in the longitudinal direction of the stack and to direct the flow parallel to the membrane surfaces towards the opposite flow passage thus obtaining a combined parallel and series flow pattern.