Electric regeneration method of non-film ion-exchange resin based on equate filter element electrode

Abstract

The invention discloses a method for electro-regeneration of a membraneless ion exchange resin based on an equivalent filter element electrode, which aims at reviving and regenerating inactive cation and anion exchange resin and chelating resin, etc. by using an electrode reaction and OH<-> and H<+> produced in hydrolytic dissociation. A microporous filter element electrode is adopted and the power is supplied by a direct current power source or a chemical power source. When in regeneration, the external pressure of an regeneration chamber of the filter element electrode is higher than the internal pressure of the filter element electrode; displaced counter ions enter into the exterior of an electrode filter element under the coupling effect of an electric field force and a water flow drag force, and an electrochemical reaction system is lead out to realize the regeneration of the resin. The anode derived water is disinfectant fluid with acid oxidation potential and used for regenerating an acidulous cation resin; the cathode derived water serves as raw water for regeneration after going through acidulous resin treatment. The method dispenses with expensive ion exchange membranes, avoids defects of blocking and electrode scaling, etc., owing to the features of membranes and has wide market prospect in a swage treatment industry.

Description

technical field [0001] The invention relates to a method and a device for electrically regenerating failed mixed ion exchange resins and chelating resins. Background technique [0002] The mixed bed has the function of fast and deep desalination, but after the ion exchange resin fails, it needs to be treated by the method of acid-base regeneration. The reaction equation can be characterized as: [0003] R { Na + 1 / 2 Mg 2 + 1 / 2 Ca 2 + } + H + ⇔ RH + Na ...

AI Technical Summary

Problems solved by technology

[0010] 1. Membrane clogging and membrane fouling

After electrification, due to the dissociation of water near the positive membrane, H + across the cation membrane, while OH - Aggregation on the membrane surface produces membrane polarization, OH - and Ca in the resin 2+ , Mg 2+ combined into Ca(OH) 2 , Mg(OH) 2 Precipitation, resulting in membrane fouling, affecting current efficiency and membrane life

[0011] 2. The electrode reaction is not used

Since the redox reaction occurs in the electrode chamber, the remaining ions of the same charge type after the electrode reaction cannot pass through the membrane, but are carried away with the water and discharged, which consumes electric energy for no reason, and the cathode is prone to scaling problems

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