FILTER APPARATUS, METHOD AND ELEMENT FOR CLEANING FOOD LIQUIDS Russian patent published in 1996 - IPC

FIELD: filtering processes. SUBSTANCE: filtering material in the two-section filter apparatus consists of aluminium, titanium or zirconium oxides, or alloys thereof. The upper section contains the charge varying from 80 to 100 mm in height with a fraction of 1.5-2.5 mm while in the lower one the charge height is 1.5-2.5 times larger than that of the upper section and a fraction of 0.6-1.0 mm. The section height in each apparatus is at least twice larger than the height of its charge. The liquid being filtered is delivered into the upper section and the filtrate is discharged from the lower one. The filtering rate is not over 75 l/sq. m.s. The filters are periodically reclaimed by pumping a detergent solution therethrough in a counterflow at the rate of not under 50 l/sq.m.s. EFFECT: improved functional and operating characteristics. 5 cl, 1 dwg