METHOD OF SOFTENING NATURAL WATER Russian patent published in 2009 - IPC C02F5/00 C02F1/46 C02F1/48 

FIELD: chemistry.

SUBSTANCE: method is meant for non-reagent softening natural water and can be used in public facilities in centralised and decentralised water supply systems, and industrial water supply systems. Natural water is softened through effect of magnetic and electric field, where water is successively filtered in ferromagnetic material, magnetised with an external magnetic field, and then filtered in granular material which is in an electric field created by an electrochemical current source. Strength of the external magnetic field ranges from 500 to 1000 A/m. Water is filtered in a granular ferrite with particle size ranging from 5 to 10 mm at a rate of 20 to 40 m/h. The electric field is created through spatial separation of electronegative and electropositive electrodes, between which granular filtering material is placed. Filtering is done in an electric field at a rate of 0.6 to 1.0 m/h.

EFFECT: method allows for softening very hard water through effect of magnetic and electric field and extraction of formed hardness salts by filtering in a granular filter bed.

3 cl, 1 dwg, 2 tbl, 2 ex