ASPIRATION APPARATUS Russian patent published in 1996 - IPC

FIELD: cleaning of bulk mixtures. SUBSTANCE: aspiration apparatus has aspiration chamber with air-permeable bottom, light fraction accumulating chamber communicated with aspiration chamber, raw material charging hopper and ready product discharge channel. Inlet and outlet portions of hopper and discharge channel are embedded into chamber lower part at diametrically opposite sides. Apparatus is further provided with device for supplying air through chamber bottom divided by folding line into two parts inclined relative to chamber wall. A portion adjacent to ready product discharge channel is made air-impermeable and partially defines channel inner surface. Length of this portion is less than total length of air-permeable portions of chamber bottom. Aspiration chamber bottom may be made rotary. Ready product discharge channel may be provided with air flow regulating mechanism . Air supply slit-type opening may be made in the vicinity of chamber bottom and chamber wall joint portion. EFFECT: increased efficiency in separating product from contaminants and enhanced reliability in operation. 4 cl, 4 dwg