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

An ion exchange resin and electric regeneration technology, applied in the direction of ion exchange regeneration, ion exchange, electric regeneration, etc., can solve the problems of unutilized electrode reaction, power consumption, negative scaling, etc., and achieve the effect of simplifying the recovery and regeneration operation process

Inactive Publication Date: 2008-09-10
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 curre

Method used

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

Examples

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Example Embodiment

[0043] Example 1: Introduce 600 ml of 001×7 styrene-based strongly acidic cation exchange resin 201×7 styrene-based strongly basic anion exchange resin that has been deactivated by NaCl. The regeneration conditions are: voltage 40V, current 3~5A, regeneration time 3h. After regeneration, the resin is led out and separated, and the cation exchange capacity is measured by GB8144-87 "Method for Measuring Cation Exchange Resin Exchange Capacity", and the anion resin exchange capacity is measured by GB5760-88 "Method for Measuring Anion Exchange Resin Exchange Capacity". The results are as follows: the exchange capacity of the cation resin is 3.4 (dry) mmol / g; the exchange capacity of the anion resin is 2.1 mmol / g (dry); both achieve the regeneration effect of chemical agents. The pH value of the anode outlet solution is less than 3, which can kill pathogenic microorganisms such as bacteria and viruses. During the regeneration process, the pH change of the electrode outlet water is as ...

Example Embodiment

[0044] Example 2: The sample is chelating resin D751, and the regeneration process is as follows: firstly, only the cathode water is exported, and after a certain period of time, the anode water is exported by inverting the electrode, and continues to the predetermined requirement.

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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 ...

Claims

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Application Information

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IPC IPC(8): B01J49/00B01J49/30
Inventor 李彦生崔经国柳志刚常卉
Owner DALIAN JIAOTONG UNIVERSITY
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