| 摘要 |
The invention relates to an annular module for filtration by reverse osmosis of a liquid under pressure. This module comprises a support formed by a tubular spool (1) having a central open volume along the entire spool height and provided with a slit (4) issuing into its peripheral face and extending along a generatrix. This slit communicates with a duct (5) formed in the thickness of the spool and issuing outside thereof at the end of a stud (3). The reverse osmosis filtration membranes (6, 7) are helically wound around the spool; the inner turn of the membranes are impermeably fastened on the peripheral surface of the spool in such a manner that the slit (4) enters between the two membranes of said inner turn.
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