Kucherik G. Development of new processes of softening and demineralization of water for water circulated ecological safe systems

Dissertation is devoted to the study of electrochemical processes, ion exchange softening and demineralization of water for water circulated heat exchange systems, processing and disposal of the resulting eluates. First determined dependency of the parameters of water treated by the anion on its salt content, hardness, shape used anion exchanger, the process conditions. Shown that the efficiency of the water softening, its purification from chlorides and sulphates increases when there is an equivalent ratio between the ions in solution and stiffness anions of strong acids at high carbonate alkalinity. Determined the effective ratio of the purified by the anion solution to the initial one for reduction of the salinity and hardness of mine water to acceptable values. Firstly set the conditions of effective water cleaning by electrodialysis in the presence of hardness ions in high concentrations. Defined the effect of the current density and duration of electrolysis on the efficiency electrochemical processing of solutions containing chloride and sodium sulfate in a two-and three-chamber electrolysis. Found that the electrolysis of an alkali solution of Na2SO4 in a three-chamber electrolytic cell can be obtained in high acid yield and alkali at high purity from the sulfates. Shown that in the electrolysis of NaCl solution, containing excess of alkali or soda in four-chamber electrolysis can be obtained by the alkaline solution and hydrochloric acid. Solved the problem of the separation of chlorides and sulfates in the vat residues neutralized copolymer of styrene and divinylbenzene. Shown that sulfates from resid can be isolated by sequential treatment with calcium chloride, lime and sodium aluminate. Developed basic flow diagram of purification of water with high salinity from the chlorides and sulphates with simultaneous softening of water.