FIELD: chemistry.
SUBSTANCE: system for natural waters desalting contains the pretreatment device and reverse osmosis device based on a membrane elements containing at least one desalting stage. Every stage includes paralleled at least one working and one reserve module. At the outlet stage of reversed osmosis device the collectors of permeate and/or concentrate in the division of working modules connection are connected through additional cutoff devices on-line with inlet of at least one reserve module of the same stage.
EFFECT: maximal usage of all installed membrane modules.
10 cl, 4 dwg, 4 tbl, 3 ex
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