FIELD: chemistry.
SUBSTANCE: membrane device for direct osmosis is suitable for immersion in a pool for evaporation of salt water under the influence of solar radiation to pre-concentrate the brine. The membrane has a flat device configuration and includes a flat membrane base having the first and the second sides; the first flat membrane attached in parallel to the first side of the base; the second flat membrane attached in parallel to the second side of the base; the first channel for the flow between the first side of the base and the first membrane, where the first channel for flow has an input side and an output side; the second channel for the flow between the second side of the base and the second membrane, where the second channel for the flow has an input side and an output side; where the membranes around the perimeter are pressed, welded or glued to the base, the input for the inert in the conjunction with the input sides of the first and the second channels for the flow and the output for the inert in the conjunction with the output sides of the first and the second channels for the flow, while the channels for the flow are formed with a woven mesh that is inserted and fixed between the base and membranes.
EFFECT: concentration of brines with a high degree of salt concentration, reduced energy consumption, reduction of production areas.
5 cl, 9 dwg, 2 ex
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