WATER TREATMENT SYSTEM USING DEVICE FOR ELECTROLYSIS OF AQUEOUS SOLUTION OF ALKALI AND ALKALINE FUEL CELL Russian patent published in 2020 - IPC C25B1/04 C25B11/12 C25B15/02 G21F9/06 H01M8/606 H01M8/10 

FIELD: chemistry.

SUBSTANCE: disclosed is a water treatment system using a device for electrolysis of an aqueous solution of alkali and an alkaline fuel cell, where (1) an electrolysis device for an aqueous solution of alkali and an alkaline fuel cell are connected to each other, (2) electrolyte solution obtained by mixing raw water and aqueous alkali solution with bringing the mixture to concentration of 5 to 60 wt. %, and the amount of water corresponding to water loss as a result of electrolytic treatment, is fed into device for electrolysis of aqueous solution of alkali and continuous electrolytic treatment is carried out, concentration of alkali is maintained at level of initial concentration of 5 to 60 wt. %, and electrolyte solution is recirculated to reduce volume of raw water, formation of gaseous oxygen in anode compartment of device for electrolysis of aqueous solution of alkali and formation of gaseous hydrogen in cathode compartment of device for electrolysis of aqueous solution of alkali, (3) electrolyte solution prepared from aqueous solution of alkali, reduced to concentration of 5 to 60 wt. %, and gaseous oxygen and gaseous hydrogen, formed by means of device for electrolysis of aqueous solution of alkali, is fed into an alkaline fuel cell, at least a portion of gaseous oxygen and gaseous hydrogen is used to generate electrical power using an alkaline fuel cell, electric power and water are accumulated, and (4) accumulated electric energy is supplied to device for electrolysis of aqueous solution of alkali for use as its electric power source, and part of accumulated water or all accumulated water is supplied to circulation line of electrolyte solution in device for electrolysis of aqueous solution of alkali to continue electrolytic treatment, as a result of which part of each of: electric energy required for device intended for electrolysis of aqueous solution of alkali, and alkaline fuel element, gaseous hydrogen and gaseous oxygen serving as raw materials for electric energy, and amount of water corresponding to water losses as a result of electrolytic treatment, are effectively used, being at that circulating in water treatment system.

EFFECT: technical result is the implementation of a water treatment system using a device for electrolysis of aqueous solution of alkali and alkaline fuel cell, in which device for electrolysis of aqueous solution of alkali and alkaline fuel cell (AFC) are combined with each other, due to which part of each of: electric power required for device for electrolysis of aqueous solution of alkali and alkaline fuel element, gaseous hydrogen and gaseous oxygen serving as raw materials for electric power, solution of electrolyte, prepared from aqueous solution of alkali, amount of water corresponding to water losses as a result of electrolytic treatment, recycled and used in water treatment system, wherein raw components and intermediate products are used completely and efficiently, as a result of which device for electrolysis of aqueous solution of alkali and alkaline fuel cell can operate efficiently.

10 cl, 3 ex, 4 dwg