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Apparatus for electrically regenerating H type cation bed failure cation exchange resin through bipolar membrane method

A cation exchange and ion exchange technology is applied in the field of devices for regenerating failed ion exchange resins, which can solve the problems of waste acid and alkali discharge polluting the environment, low acid and alkali utilization, complicated regeneration operations, etc. The effect of convenient operation and simplified operation

Inactive Publication Date: 2019-06-21
SUZHOU HUAQING WATER TREATMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many defects in the acid-base chemical regeneration method of invalid ion exchange resins, such as low utilization rate of acid-base for regeneration, waste acid-base liquid discharge pollutes the environment, complex regeneration operation, acid-base is regarded as a dangerous chemical, and attention should be paid to safe storage and transportation. The working conditions are also bad, therefore, there is an urgent need to develop a new method for the regeneration of ion exchange resins

Method used

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  • Apparatus for electrically regenerating H type cation bed failure cation exchange resin through bipolar membrane method
  • Apparatus for electrically regenerating H type cation bed failure cation exchange resin through bipolar membrane method
  • Apparatus for electrically regenerating H type cation bed failure cation exchange resin through bipolar membrane method

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Embodiment 1

[0039] figure 1 It is a schematic diagram of the appearance of the H-type cation bed failure cation exchange resin device for electric regeneration by bipolar membrane method during downstream regeneration.

[0040] A device for electrically regenerating H-type cation bed exhausted cation exchange resin by bipolar membrane method, which includes the following parts:

[0041]①Bipolar membrane electrodialyzer 3: It is a plate-and-frame type, which is composed of multiple sets of membrane pairs, and each set of membrane pairs is composed of a negative membrane 8, a positive membrane 9 and a bipolar membrane 10, each There are separators between the membranes, electrodes and end plates at both ends, fixed with multiple bolts, and compressed into a whole. The specific assembly method is to match a negative membrane, a positive membrane and a bipolar membrane as a group. Starting from the anode 7 from left to right, arrange in order, the first group of negative film 8, positive fil...

Embodiment 2

[0050] image 3 It is a schematic diagram of the appearance of the H-type anode bed failure cation exchange resin device for electrical regeneration by bipolar membrane method during countercurrent regeneration.

[0051] The method of bipolar membrane electrical regeneration of spent cation exchange resin in the H-type cation bed during countercurrent regeneration is roughly the same as that during downstream regeneration.

[0052] Countercurrent regeneration means that the flow direction of the regeneration liquid in the H-type cation-bed ion exchange tank is from bottom to top and the flow direction of the liquid to be treated is opposite from top to bottom during operation, that is, the two fluid directions are countercurrent.

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Abstract

The invention relates to an apparatus for electrically regenerating an H type cation bed failure cation exchange resin through a bipolar membrane method. The apparatus comprises three parts of a bipolar membrane electrodialyzer, a liquid storage tank and an ion exchange tank, wherein the bipolar membrane electrodialyzer is plate-and-frame type, and comprises multiple sets of membrane pairs, each set of the membrane pair comprises a cation membrane, an anion membrane and a bipolar membrane, separation plates are arranged between each membrane, both ends are electrode plates and end plates, fixing is performed by a plurality of bolts, clamping is performed to form an integration, the liquid storage tank comprises a dilute salt water tank, a polar water tank, a dilute alkali tank and a diluteacid regenerating liquid tank, and the ion exchange tank is an H type cation bed ion exchange tank. According to the present invention, the traditional process for regenerating the H type anion bed by purchasing the acid liquid is replaced with the new process for preparing the acid liquid through water dissociation by the bipolar membrane electrodialyzer under the action of the direct current electric field, such that the regeneration level of the cation resin is improved, the storage and transportation link of the acid regeneration liquid is eliminated, the regeneration operation of the cation resin is convenient, the safety level is improved, and the environment is friendly.

Description

technical field [0001] The invention relates to a device for regenerating spent ion exchange resin in ion exchange process. Background technique [0002] Ion exchange technology has been widely used in petrochemical, light industry, food, medicine, metallurgy, atomic energy, electric power and environmental protection, involving all aspects of national economy and people's life. Taking a thermal power plant as an example, the preparation of boiler feed water and condensate polishing requires the use of various advanced physical and chemical treatments and various membrane technologies, as well as the use of ion exchange water treatment technology, which requires the use of various ion exchange equipment. , such as yang bed, yin bed, mixed bed, etc. These ion exchange devices are all filled with ion exchange resins, and the ion exchange resins must be regenerated after the equipment runs to treat water and becomes invalid, so that the invalid ion exchange resins can recover ...

Claims

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Application Information

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IPC IPC(8): B01J49/00B01J49/30B01J49/53B01D61/44
Inventor 王明亚王方王明太
Owner SUZHOU HUAQING WATER TREATMENT TECH
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