Apparatus for electrically regenerating OH type anion bed failure anion exchange resin through bipolar membrane method

Abstract

The invention relates to an apparatus for electrically regenerating an OH type anion bed failure anion 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 acid tank and a dilute alkali regenerating liquid tank, and the ion exchange tank is an OH type anion bed ion exchange tank. According to the present invention, the traditional process for regenerating the OH type anion bed by purchasing the alkali liquid is replaced with the process for preparing the alkali 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 OH type anion bed anion resin is improved, the storage and transportation link of the regenerated alkali liquid is eliminated, the regeneration operation of the anion 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 ...

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

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