Patent ID: 7008540
Filing Date: 2006-03-07
Classification: B01D

Abstract:
1. A membrane filtration system for filtering a liquid to be filtered comprising: a casing having flanges which support and sealingly close ends of the casing; an inlet conduit for introducing the liquid to be filtered into the casing; an outlet conduit for removing liquid concentrate from the casing; an evacuation conduit for the egress of filtered fluid from the casing; a membrane cell having a filtration membrane which filters the liquid to be filtered and permeates the filtered fluid to the evacuation conduit; said inlet and outlet conduits communicate with a first surface of said filtration membrane and said evacuation conduit communicates with a second surface of said filtration membrane, and an ultrasonic transducer in direct contact with the liquid to be filtered and adapted to direct ultrasonic energy at said filtration membrane, wherein said ultrasonic transducer has a ring shape and said filtration membrane has a cylindrical shape, and said ultrasonic transducer surrounds said filtration membrane, or is surrounded by said filtration membrane, and further comprising means for guiding movement of the transducer longitudinally along a length of the filtration membrane.