METHOD OF REUSING NA-CATIONITE FILTER REGENERATES Russian patent published in 2005 - IPC

FIELD: water-supply engineering.

SUBSTANCE: invention concerns water-supply means for feeding power plants and boiler installations provided with ion-exchange water-desalting filters. Preparation of purified sodium chloride solution followed by reuse thereof as regeneration solution for Na-cationite filters is accomplished by passing regenerate through electrolyzer, then settling catholyte to precipitate hardness salts, neutralizing solution with hydrogen chloride formed in electrolysis process, and passing neutralized solution through supplementary Na-cationite filter. pH value of as-electrolyzed solution is maintained not below 11.0.

EFFECT: prevented discharge of chlorides into water objects and reduced expenses on water treatment due to reduced consumption of reagents.

2 cl, 1 tbl, 2 ex