Patent ID: 7892430
Filing Date: 2011-02-22
Classification: B01D

Abstract:
1. An apparatus for filtering substances out of liquids by micro-, ultra- and nanofiltration, said apparatus comprising a number of filter nodules comprising filter elements, which are formed as flat membrane cushions and are surrounded by a liquid that is to be filtered, the filter elements being arranged parallel to and at a distance from one another and being connected to one another by outflow bores and connecting elements, and having one permeate outlet per filter module and a permeate collection manifold, to which the permeate outlets of the filter modules are connected, wherein in each filter element a single-layer or multilayer drainage element is enclosed between two outer membranes and is joined to the membranes on both sides by surface-to-surface adhesion, and wherein the filter element is provided with one or more outflow bores surrounded by equally sized surface regions of the filter element, each outflow bore being arranged in the center of the surface region surrounding it, and each outflow bore equipped with a supporting element, and the drainage element comprises one or more woven fabrics made up of yarns, filaments, threads or wires of polymers or metals, one or more nonwoven fabrics of polymers, or a combination of these woven and nonwoven fabrics, adjacent filter elements are connected to one another in a pressure-tight manner by means of tubular connecting elements, each connecting element being connected to two outflow bores located opposite one another in the adjacent filter elements and the tubular connecting element has a cylindrical extension on both end sides.