REVERSE OSMOSIS PLANT Russian patent published in 2008 - IPC B01D61/08 

FIELD: crude-water reverse-osmosis plants used for producing permeate deficient in salts.

SUBSTANCE: plant includes at least one reverse-osmosis module 22, 23 with inlet 21 for crude water, outlet 24 for concentrate, outlet 25 for permeate. Plant also includes recirculation pipeline 26 for secondary passing of permeate from outlet 25; pressure pickup 33 arranged at outlet 25 for permeate or in discharging port 29 for permeate downstream relative to outlet 25 and used for registering Pp of permeate. Pressure control apparatus for controlling pressure Pcr of crude water depending upon preset pressure value Pp of permeate at outlet 25 is arranged in pump 18 for feeding crude water or between said pump and inlet 21. Pressure control apparatus includes frequency converter 19 for controlling pump operation in such a way that to provide pump operation in pressure range 2 - 140 bars or in mode of continuous regulation of pump.

EFFECT: possibility for producing water with lowered content of salts, prevention of salting reverse-osmosis modules and development of microorganisms, reduced power consumption.

23 cl, 3 dwg