Membrane module for immersed operation

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 63/02 (2006.01) B01D 65/08 (2006.01)

Patent

CA 2570453

The invention relates to a membrane module for immersed operation, comprising a bunch of fibers (1) that is composed of a plurality of hollow fiber membranes (2), one open end of which is cast into a head piece (3) and which are surrounded by a liquid that is to be filtered in immersed operation, a permeate collecting chamber (4) which is adjacent to the head piece and is provided with at least one permeate outlet (5) for the permeate discharged from the interior of the hollow fiber membranes, and a gas inlet (6) which encompasses a tube (7) that is guided through the head piece. Said tube (7) ends inside the bunch of fibers (1) while being provided with a gas outlet (8) for a gaseous medium which rises in the form of bubbles essentially between the hollow fiber membranes (3) of the bunch downstream of the transition from the tube (7) into the liquid that is to be filtered. According to the invention, the bunch of fibers (1) is subdivided into sections (11), each of which comprises a group of hollow fiber membranes (2). Free spaces (12) which are provided between said sections (11) extend from the tube (7) to the outer circumference of the head piece (3) while promoting the flow of the liquid that is to be filtered into a bottom area of the bunch of fibers (1), said bottom area adjoining the head piece (3).

L'invention concerne un module à membrane pour travail en plongée, comprenant un faisceau de fibres (1) composé d'une pluralité de membranes de fibres creuses (2) qui sont moulées, par une extrémité ouverte, dans une pièce de tête (3) et qui sont entourées d'un liquide à filtrer, un compartiment collecteur perméat (4) relié à la pièce de tête, ayant au moins une sortie perméat (5) pour le perméat s'écoulant de l'intérieur des membranes de fibres creuses et une amenée de gaz (6) présentant un tube (7) traversant la pièce de tête. Le tube (7) débouche à l'intérieur du faisceau de fibres (1) et présente une sortie de gaz (8) pour un fluide gazeux qui s'élève, sous forme de bulles, après sortie du tube (7), dans le liquide à filtrer, sensiblement entre les membranes de fibres creuses (2). L'invention est caractérisée en ce que le faisceau de fibres (1) est divisé en sections (11) comprenant chacune un groupe de membranes de fibres creuses (2), et en ce qu'entre les sections (11) demeurent des espaces libres (12) qui s'étendent du tube (7) jusqu'au pourtour extérieur de la pièce de tête (3) et qui favorisent une amenée du liquide à filtrer dans une zone de fond dudit faisceau de fibres (1), adjacente à la pièce de tête (3).

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