MEMBRANE APPARATUS Russian patent published in 1997 - IPC

FIELD: chemical engineering. SUBSTANCE: apparatus is designed for micro- and ultrafiltration, and concentration of liquid media and can be used in biomedical, chemical-pharmaceutical, and food industries. Apparatus contains combined in packet semipermeable membranes and drainage plates with through cuts. These cuts are connected with through openings wherein sealing rings are installed having openings on the side surface for overflow of liquid. Drainage plates are made of material with yield strength less that of membrane material. Rings for overflow of liquid are made of material with yield strength higher than that of drainage plate material, whereas ring sides are covered with layer of material used for manufacturing drainage plates. EFFECT: provided tightness of thin film membranes, for instance track membranes.