Compound bed regenerated wastewater resource recycling system

Abstract

The invention relates to a resource recycling process and a resource recycling system for compound bed regenerated wastewater. The resource recycling system for the compound bed regenerated wastewateris used for treating regenerated wastewater generated by ion exchange regeneration. According to the invention, a membrane separation and concentration system and a bipolar membrane system are sequentially arranged; the membrane separation and concentration system is used for carrying out quality-divided recycling on the composite bed ion exchange resin regeneration wastewater, and the bipolar membrane system is used for treating a concentrated solution of the membrane separation and concentration system to obtain acid and alkali which are recycled for the system. The system has the advantages that sulfate radicals are efficiently concentrated with low energy consumption, the salt concentration of acid and alkali prepared by a bipolar membrane is guaranteed, the rest monovalent brine suchas sodium chloride, sodium nitrate and the like is concentrated by a reverse osmosis system and sent to the bipolar membrane to prepare acid and alkali, and mixed acid can be prepared or sulfuric acid and hydrochloric acid can be respectively prepared according to the difference of inlet water quality; reasonable arrangement is realized according to the treatment characteristics of respective membranes; and the energy consumption of the whole system is greatly reduced while efficient concentration is realized.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a resource recovery process and system for multiple-bed regeneration wastewater. Background technique [0002] Ion exchange resins are widely used in power plants, water treatment, high-purity water production and other fields. Ion exchange resin has many advantages such as good adsorption selectivity, high mechanical strength, strong anti-pollution ability, good physical and chemical stability, and recyclable use. It is easy to operate and low in investment. However, when the ion exchange resin fails, it needs to be regenerated, and a large amount of wastewater containing ion exchange regenerants will be generated. The high total salt content of ion exchange regeneration wastewater and the unstable discharge pH value not only cause waste of water resources, but also have a bad impact on the environment. [0003] In recent years, with the promulgation and implemen...

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Problems solved by technology

[0005] In order to overcome the current situation that the existing anion resin regeneration wastewater is difficult to treat and discharge, the present invention provides a resource recycling process system for anion resin regeneration wastewater. Reuse of pure water, separate and treat the high-salt regeneration wastewater discharged originally, reduce the discharge of regeneration wastewater, and realize efficient recycling of water resources at low cost

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