SEA WATER FRESHENING METHOD AND APPARATUS Russian patent published in 2000 - IPC

FIELD: back osmosis sea water freshening equipment. SUBSTANCE: apparatus has salt water inlet or outlet 1, at least one first well 4 provided with device for creating water column inside well 4, back osmosis freshening device disposed in the vicinity of first well lower end, and device for collecting sweet water discharged from back osmosis freshening device. Depth of well 4 is such that weight of water column within well is sufficient for forcing salt water through back osmosis freshening device. Apparatus may comprise several water columns. Sweet water is discharged from filters, collected and forced outside. Effluent filtration wastes are collected and directed outside onto surface. Method is cited in Specification. EFFECT: increased efficiency by providing production of sweet or pure water at reduced costs without employment of complicated techniques. 31 cl, 5 dwg