MEMBRANE DEVICE FOR VISCOUS LIQUID FILTRATION Russian patent published in 2005 - IPC

FIELD: liquid solution separation, concentration and desalination by reverse osmosis and ultrafiltration methods for food, pharmaceutical, microbiological industries and factory-farm enterprises.

SUBSTANCE: membrane device comprises tubular membrane module consisting of two coaxial cylinders. One of cylinders is formed of porous material and has semipermeable membrane on inner surface thereof. Device also has turbulizing means, inlet and outlet connection pipes for introducing initial solution and discharging filtrate and concentrated product from device. Pressure chamber with inlet connection pipe located tangentially to pressure chamber is arranged at center of tubular membrane module. Pressure chamber is connected with flange connectors in air-tight manner. Arranged in pressure chamber is wheel formed of two enclosures defined by vertical discs, which are divided by perforated cylindrical surface. Arranged in enclosure above perforated cylindrical surface are blades welded to side surfaces of vertical discs. Blades are directed towards initial solution flow so that upon wheel rotation maximum torque is created. Enclosure located under perforated cylindrical surface has orifices for initial solution movement into membrane channel. Diameter of circle enclosing orifices is equal to inner diameter of flange connector to be secured to pressure chamber body. Resilient rope with fixed tubulizing discs is located inside tubular membrane module coaxially with semi-permeable membrane. Discs are spaced equal distances one from another and made as a set of resilient plates so that annular part is created in tubulizing disc center. Annular part is impermeable for initial solution. Rope is fixedly secured to a bush welded to vertical wheel discs. Rope ends are secured to friction rolls to prevent rope sagging along semipermeable membrane surface.

EFFECT: increased capability due to improved hydrodynamic effect on flow to be separated by minimizing layer with high concentration along the full length of semipermeable membrane.

4 dwg