WATER PURIFICATION AND FRESHENING STATION Russian patent published in 1994 - IPC

FIELD: water purification and freshening. SUBSTANCE: station has four-way cock 12, circulatory pump 11, flowmeter 13 with valve 14 connected to prefilters battery 5-7 together with electromagnetic valves 8-10. Station also has salinity control means having tank 26, delivery valve 28 and two three-way cocks 29 and 30. Besides, the station has turbidimeter pickup 3, crude water and effluent water pickups 4 and 31, preservative proportioner provided with pump 32, container 33. Crude water is pumped by pump 2 to battery 5-7 of ultrafilters having hollow filaments and is further transmitted to a first stage inversely-osmotic apparatus (1 A) via electromagnetic valves 8-9 and sterilizing means 15. From the first stage inversely-osmotic apparatus the water is transmitted either to sorption filter 16 or to the second-stage reversely-osmotic apparatus (11 A) via the salinity control means. Depending on the crude water salinity either filtrate 1 A or concentrate 11 A or purified water is added into the filtrate 11 A while maintaining a preset salinity in the sanitary water. EFFECT: increased filter run, improved quality of water. 3 dwg