Patent ID: 6500331
Filing Date: 2002-12-31
Classification: B01D

Abstract:
A machine for micro-filtering solid particles suspended in a liquid stream, said machine comprising:a feeding chamber communicating through a duct with one or more treating chambers, each of said treating chambers being defined by at least two coaxial filtering discs rotating around their own axis arranged horizontally and normal to the direction of the flow to be treated, and at least one partially cylindrical wall defining together with rims of said at least two discs a hydraulic sealing coupling to enclose the liquid treating space comprising at least the rotation axis; conveyance chambers for the treated liquid provided with bottom outlets communicating with at least one collection chamber for the liquid coming from said conveyance chambers, provided with liquid discharge pipes; and means for transmitting rotation motion to said filtering discs, wherein each disc of said at least two discs is provided with one or more washing ramps arranged outside said treating chambers and provided with nozzles discharging water against said discs at portions of said discs emerging from said treating chambers, said washing water being collected by at least one conveyance channel for the liquid and the particles collected by washing said at least two discs, arranged between said at least two discs above the treating chamber and ending with a duct feeding the liquid back to the purification plant arranged upstream said machine.