Study On Swirl Bed Ion Exchange And In-site Regeneration Technology

In this paper,from the two aspects of scale inhibition and descaling,based on the titanium filter electrode with internal cavity,the annular region between the anode and cathode is filled with ion exchange resin and spiral.The resin particles are suspended and rotated under the action of the water flow field and the electric field,and the rising swirl field drives the particles to frictionally clean the inner wall of the cathode tube shell to control the growth of the scale.The spiral piece can increase the cathode area,thereby reducing the scale on the cathode wall,thereby slowing down the attenuation of the current and improving the stability of the electrolysis process.At the same time,under the action of the electric field,the hardness ions on the failed resin migrate toward the cathode and form scale.By changing the split ratio?effluent flow,and adding a mixed resin to the device for research.The study concluded that:1.At 12V,a certain volume of nearly dead cation resin is added to the electrochemical device to process 18L of well water.The optimum hardness of the resin regeneration effect can be reduced from 213mg/L to 60mg/L at a split ratio of 0:1.2.Investigate the influence of flow rate on the treatment effect of the device.Under the condition of small flow rate,the tap water hardness removal rate can reach 15%.At higher flow rates,the hardness removal rate can only reach 4%.3.1n-situ regeneration of the device by well water,the final hardness removal rate can reach 21%when the split ratio is 0:1 4.By comparing the experimental results of adding a single resin and a mixed resin,the in-situ regeneration of the mixed resin is better than that of the single resin,the cathode hardness removal rate can reach 6.25%,and the anode hardness removal rate is 22.5%.5.The backwashing experiment of the electrochemical device is better than the large flow backwashing.