METHOD OF WATER OR SALT SOLUTION DESALTING BY FREEZING AND THAWING Russian patent published in 2002 - IPC

FIELD: technology of water treatment. SUBSTANCE: invention relates to methods of water desalting in industry and in homes. Method of desalting water or salt solutions by freezing and thawing involves water freezing water or salts solution in a vessel in the ratio of vessel height to transverse section ≥ 2 being a vessel is fitted with a heater by is axis. After complete liquid freezing in a vessel a hole is made in vessel bottom center and ≥ 15% of ice is melted by means of axis heater obtaining a saline mother liquid and remained ice is melted in an arbitrary regime and purified water is prepared. For a single cycle 80 vol. % of liquid is obtained that is desalted by 30-40% and 20% of concentrate. Invention can be used for water treatment and desalting in homes, treatment of drinking water, industrial flows and concentration of waters and solutions. EFFECT: improved method of desalting. 2 cl, 7 dwg