Patent ID: 7638048
Filing Date: 2009-12-29
Classification: B01D

Abstract:
1. A membrane module suitable for immersed operation comprising: a headpiece adapted to be lowered into a basin with liquid to be filtered; a fibre bundle consisting of a large number of hollow fibre membranes which are cast into the headpiece with an open end and in immersed operation are surrounded by the liquid to be filtered, a permeate collection chamber connecting to the headpiece with at least one permeate outlet for the permeate draining from the interior of the hollow fibre membranes and a gas supply having a pipe guided through the headpiece, wherein the pipe terminates in the interior of the fibre bundle and has a gas outlet for a gaseous medium which after the transition from the pipe to the liquid to be filtered largely rises between the hollow fibre membranes of the fibre bundle as bubbles, wherein the fibre bundle is divided into sections each comprising a group of hollow fibre membranes, wherein free spaces remain between the sections extending from the pipe to the outer circumference of the headpiece and promoting an inflow of the liquid to be filtered into a foot area of the fibre bundle adjoining the headpiece, wherein a cap closed at the top is arranged on the pipe, and wherein the pipe and the cap form a flow space for the gaseous medium which is open at the lower end of the cap.