The Research On Membrane Technology Of Ion Exchange Resin Electrolytic Regeneration

Ion exchange resin is one of the most familiar materials used in the processing of industrial water-supply. At present, the method of using acid and alkali chemical is often applied to make the exhausted ion exchange resin regenerate. But this method has many disadvantages, such as environmental pollution, waste of sources, etc. On the bases of systematically expounding the structure and the balanced reaction of ion exchange resin, the author made careful research on the regeneration reaction of the ion exchange resin.According to the analysis for the regeneration process of the ion exchange resin during the course of making pure water by packed electrodialysis bed, the author puts forward a theory of electrolytic regeneration, which has advantages such as no use of acid and alkali chemical ,no environmental pollution during the regeneration process of the ion exchange resin once the theory is applied into practice. The theory means that in a DC electric field, using water as a regenerant, the water dissociates into H+ and OH- ions, which regenerates the exhausted ion exchange resin. In accordance with the theory, the author designed the experiment device, that is, refitting the packed electrodialysis bed into the electrolytic regenetation device for the ion exchange resin, putting the exhausted and mixed ion exchange resin into the fresh-water container and with the help of electric field, the exhausted ion exchange resin obtaining regeneration.It is researched that the regenerating voltage, time and other parameters' influence on the generation result. And the results prove that this device is feasible in technology. Meantime, through economic analysis, it indicates that this device will create much value once applied.