Patent ID: 7887702
Filing Date: 2011-02-15
Classification: B01D

Abstract:
1. A closed-type filtering apparatus employing a multistage rotor generating variable vortex flow in which introduced raw water for filtering is separated into purified/treated water and concentrated water to he discharged. the filtering apparatus comprising: a closed-type barrel having a left lid unit and a right lid unit therein and forming a body of the filter apparatus; a plurality of plate-type porous membranes installed spaced apart in an inner wall of the barrel and configured to filter the raw water; a rotary shaft installed in a central portion of the barrel and connected to a driving shaft of a motor; a plurality of rotary rotors of varying diameter installed spaced apart on the rotary shaft and alternatively arranged with the membrane, and configured to generate vortex; a raw water inlet installed in the left lid unit; a purified water outlet installed in the right lid unit; a concentrated water outlet installed in the right lid unit; a supporting bracket installed at a predetermined distance and configured to prevent the rotary shaft from bending or drooping; and a subsidiary bracket configured to support the barrel, wherein the smallest diameter of rotary rotor is installed in the raw water inlet through Which the raw water inflows and the diameter of rotary rotor is gradually increased towards the concentrated water outlet.