PLANT FOR PRELIMINARY PURIFICATION OF SEWAGE BY FILTRATION Russian patent published in 1995 - IPC

FIELD: purification of industrial sewage. SUBSTANCE: sewage is advanced through pipe-line onto internal surface of filtering drum which is driven into rotation by drive. Drum is submerged into filtrate with its lower part. Solid inclusions are caught from internal surface of the drum by shelves. The shelves are fixed inside hinges and compressed by twisting springs ahead along the pass of the drum. Position of the shelf during process of drum revolution provides optimal capture of inclusions at filtering zone, as well as straining inclusions off during motion of the shelf up, effective unloading of wastes into the bin and regeneration by means of brush shaft. When the shelf moves above the bin, the inclusions slide down the bin and are removed from the plant by conveyer. Crane is provided for emptying of the plant. EFFECT: higher efficiency. 2 cl, 4 dwg