METHOD OF PREPARING WATER OF SPECIFIED QUALITY Russian patent published in 2015 - IPC C02F9/10 C02F103/06 

FIELD: chemistry.

SUBSTANCE: artesian water is fed into a condenser, heated to temperature of 21°C to 31°C and then fed into a system for preliminary purification from undissolved impurities. Further, the water is fed into a reverse osmosis apparatus, from which permeate water and a concentrate are output. The permeate water is fed into a mixer and the concentrate is fed through a heat exchanger at temperature of 42°C to 68°C into a vacuum evaporation crystallisation apparatus, wherein a vacuum of 0.8 to 0.4 atm is generated by a vacuum pump. Further, the suspension with crystals is fed for dehydration. The distillate from the vacuum evaporation crystallisation apparatus is fed into the heat exchanger where it is condensed, and then into the condenser where it is completely condensed, thereby imparting excess heat to the artesian water from the water-bearing layer, and then from the condenser into the mixer for mixing with the permeate water. In the mixer, the permeate water is diluted with the distillate in a ratio ranging from 8:2 to 10:8. The volume of the distillate fed into the mixer is controlled by varying the number of cycles of returning the concentrate to the reverse osmosis apparatus and controlling the value of the vacuum, temperature and time of evaporating the concentrate. Water in the mixer is ozonised. Mineral and organic trace elements are added. The obtained water is collected in a storage tank, bottled and then shipped to the consumer.

EFFECT: invention enables to obtain water with a given composition of mineral and organic substances.

1 dwg