ES387380A2 - Method and filtration apparatus. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in the object of the patent 365,071, by filtration method and apparatus, and more particularly in the filtering apparatuses, which have a deposit equipped with means for the entrance of impure liquid and for the exit of clean liquid, and a bed of granules of filtering media in said deposit interposed between said input means and said exit means, characterized by the provision of an additional outlet opening for said deposit, a circulation receptacle having an entrance communicating with said opening for receiving said depositing a suspension of liquid containing granules of filtering medium and simultaneously particles of impurities previously retained in said bed, and a first outlet, an element pierced in said receptacle or interposed between said first and second exits, said perforated element having perforations of a size that prevents the passage of said granules through the same but that which allows the passage of liquids and particles of impurities mixed with it through them, drain means connected to said second outlet to allow the extraction, with respect to said suspension, of a part only of said liquid and impurities mixed with it and through said perforated element, and means of passage connecting the first exit with the deposit to return to said deposit that part of said suspension not extracted in that way and including said means. (Machine-translation by Google Translate, not legally binding)