METHOD OF FILTRATION OF LIQUIDS AND FILTER FOR CLEANING LIQUIDS Russian patent published in 1997 - IPC

FIELD: cleaning liquids from suspensions. SUBSTANCE: liquid is passed through layer of granular charge located in housing on screened partition; charge is regularly regenerated by recirculation mixing of hydrodynamic flow of liquid with charge inside housing made in form of torus. Filter has housing with screened partition in form of hemisphere or pyramid with filtering charge located on it. Filtering charge is mixture of crushed nut-shell and pecan nut shell; filter has device for creating toroidal flow at regeneration; this device is made in form of pump provided with suction branch pipe connected to upper portion of housing and delivery branch pipe located in housing along its axis. EFFECT: enhanced efficiency. 5 cl, 12 dwg