FIELD: chemistry.
SUBSTANCE: invention relates to demineralization and desalination of natural and waste water by reverse osmosis. Membrane roll element, including sheets of double-folded membrane, turbulence promoter-separator and drainage fabric, spirally wound on a perforated water discharge tube, differing by that, the turbulence promoter-separator is made in the form of a double-folded mesh from polymer material with mesh size of at least 5–7 mm.
EFFECT: longer service life of membrane roll element.
1 cl, 2 dwg
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