| 摘要 |
The invention relates to a membrane module for a device used to separate substance mixtures in a cross current method. Said membrane module comprises, a number of tubular membranes (22, 24, 26) which encircle, at least in sections, a common axis in an essentially helicoidal manner and which are provided for forming an essentially discoidal module (20). The aim of the invention is to improve a module of this type. To this end, at least two of the tubular membranes (22, 24, 26) encircle a common spiral axis in a helical manner, said membranes being preferably twisted like a cable, at least along the progression of a part of their essentially helicoidal encircling in order to form a tubular membrane strand.
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