DEVICE FOR AERATION OF LIQUID Russian patent published in 1996 - IPC

FIELD: aerating devices for treatment of natural or domestic and sewage waters in various industries. SUBSTANCE: device for aeration of liquid has body in form of perforated polymer tube with dispersing layer of polymer fibrous material applied by pneumoextrusion. Tube perforation is made in form of transverse segment slots. Flexible membranes made in form of flat rings are installed so as to overlap its row of holes. Dispersing layer applied to tube has porosity variable in thickness: 300-500 μm on the inner layer and 50-100 μm on the outer layer. In its turn, perforated tube has base for dispersing layer in form of polymer net with cells having diameter which is laid twice on the perforation spacing. Net is fitted on the framework in the manner of stocking. Perforation on the tube is made over the multiple thread screw. The number of segment holes in the plane of the body cross-section over perforation is equal to the number of helical line starts. EFFECT: higher efficiency. 2 cl, 2 dwg