WATER DEGASSING METHOD Russian patent published in 2019 - IPC C02F1/20 C02F9/02 C02F1/42 C02F1/44 B01D19/00 C02F103/04 

FIELD: chemistry.

SUBSTANCE: invention can be used to produce deaerated and decarbonised water and its use in heat engineering. Method of water degassing includes preliminary clarification of initial water, supply to Na-cation filters, wherein hardness of softened water is maintained in range of 0.02–0.1 mg-eq/l. Solution of caustic soda is dosed into the softened water; the amount of sodium hydroxide is not more than 10–15 % of the amount of carbon dioxide in the water. Solution of sodium sulphite is then dosed into the water, wherein the amount of sodium sulphite is selected based on the concentration of dissolved oxygen in the treated water. Then, water is directed to reverse-osmosis water desalination unit, at that ratio of permeate to initial flow is set within 75–90 %. Obtained partially desalted and degassed permeate is supplied to consumer, concentrate is drained into sewerage.

EFFECT: method provides higher efficiency of chemical bonding of oxygen dissolved in water, excludes increase of salt content of treated water, and also considerably reduces total salt content of treated water.

3 cl, 1 dwg, 4 tbl, 1 ex