Membrane capacitive deionization array with movable type electrodes and deionization method thereof

Abstract

The invention discloses a membrane capacitive deionization array with movable type electrodes and a deionization method thereof. The array comprises the following components: adsorption modules and desorption modules are mutually spaced and alternatively arranged into an array, and the movable type electrodes are periodically positioned in the adsorption modules and the desorption modules. The traditional membrane capacitive deionization technology is used as a prototype, adsorption modules are arranged, arrangement sequence of an ion-exchange membrane is changed, the desorption modules are arranged, originally fixed electrodes are innovatively changed into movable type electrodes, the electrodes are periodically arranged in the adsorption modules and the desorption modules, so that the purpose that the deionization process is stably efficient for a long time is realized; the adsorption modules and the desorption modules work simultaneously in different regions, in order to form a stable working cycle, and circuit with reversal connection is not needed for backwashing; the deionization method can be operated continuously with high efficiency and stabilization, and the deionization efficiency is high.

Description

technical field [0001] The invention relates to capacitive deionization technology, in particular to a membrane capacitive deionization array with movable electrodes and a deionization method thereof. Background technique [0002] my country is a country with a large amount of water resources, but the per capita water resources are only a quarter of the world average. In recent years, the shortage of water resources has not only become an important factor restricting economic development, but also may cause social and environmental problems such as environmental degradation and ecological degradation. The national conditions of shortage of water resources have put forward higher requirements for my country's sewage reuse technology and seawater desalination technology. Coagulation sedimentation, filtration, biological oxidation, activated carbon adsorption, disinfection and other traditional conventional processes have good effects in removing organic matter, suspended soli...

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Problems solved by technology

[0004] However, with the operation of the membrane capacitive deionization device, the electrode tends to be saturated, and the deionization efficiency gradually decreases. The deionization process must be stopped, and the circuit is reversed for desorption. This phenomenon reduces the overall deionization efficiency and also reduces the overall deionization efficiency. Reduce the amount of water that can be treated per unit time

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