MEMBRANOUS APPARATUS WITH A PULSE MODE OF FILTRATION Russian patent published in 2004 - IPC

FIELD: separation, concentration and desalination of different solutions by hyperfiltration and ultrafiltration.

SUBSTANCE: the invention presents a membranous apparatus with a pulse mode of filtration and is dealt with areas of separation, concentration and desalination of different solutions by methods of hyperfiltration and ultrafiltration. The membranous apparatus contains: a tubular membranous unit made in the form of two coaxially located cylinders, one of which is made as a porous body with a semipermeable diaphragm applied on its inner surface; connecting pipes for delivery of an initial solution, removal of a filtrate and a concentrate; a impermeable hose placed coaxially to the membranous surface. On the inner surface of the porous body there are rings installed equidistantly from each other and in the impermeable hose there is a rotating shaft with fixed profile elements. At that the symmetry axes of the rings and the profile elements coincide. On the butt surface of each profile element there are rollers supporting segments, on the lateral surfaces of which there are grooves, through which the rods are passing in parallel with the shaft and preventing the segments turning. The rollers are installed in the segments with possibility of rotation with the help of the hollow tubes, on the butts of which there are metal balls fixed in the grooves of the feeder dials. At that the diameter of the balls exceeds the inner diameter of the hollow tubes and the width of the grooves of the feeder dials. The feeder dials are fixed on the shaft with the help of the retaining rings placed on their outer surface so, that at rotation of the profile elements the segments could loosely move in transversal directions. The rods passing through the grooves of the feeder dials prevent their turning. At that the grooves of the segments and the feeder dials coincide and the width of the grooves is less than diameter of the rods. On the rods between the outer sides of the feeder dials there are sleeves put on the rods and fixed to flanges. The technical result is an increase of productivity of the membranous apparatus at the expense of improved hydrodynamic action on a divided stream due to the decrease of the high concentration layer formed on the diaphragm and its entrainment.

EFFECT: the invention allows to increase productivity of the membranous apparatus.

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