Automatic cleaning device based on bipolar membrane of electrodialyzer

Abstract

The invention provides an automatic cleaning device based on a bipolar membrane of an electrodialyzer, which comprises a main body, wherein a movable shaft is installed in the inner wall of the main body, a cationic membrane and an anionic membrane are installed on the two sides of the movable shaft and located in the inner wall of the main body, two power wheels are movably installed on the movable shaft, the outer sides of the two power wheels are each provided with a plurality of stress blades, the stress blades are evenly distributed on the outer sides of the power wheels, three cleaning devices are installed between the two power wheels, and the cleaning devices are located on the movable shaft. According to the automatic cleaning device based on the bipolar membrane of the electrodialyzer, on the one hand, suspended solids and impurities adsorbed on the cationic membrane and the anionic membrane can be effectively removed, meanwhile, the penetrability of a water solution is improved, and on the other hand, performance reduction caused by scale deposition on the cationic membrane and the anionic membrane can be improved.

Description

technical field [0001] The invention belongs to the technical field of electrodialyzers, in particular to an automatic cleaning device based on a bipolar membrane of an electrodialyzer. Background technique [0002] The electrodialyzer is based on the principle that the ion exchange membrane has selective permeability to the anion and cation of the electrolyte in the solution under the action of a direct current electric field, that is, the cation can pass through the positive membrane, and the anion can pass through the anion membrane. The membrane and the separator form a compartment, which is divided into a dilute chamber and a concentrated chamber. The anions in the dilute chamber migrate to the anode direction and pass through the anion membrane and are blocked by the positive membrane in the concentrated chamber in the concentrated chamber, so that the solution in the dilute chamber It can be desalinated, and the solution in the concentrated chamber will increase its c...

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Problems solved by technology

[0003] The bipolar membrane is a layered membrane with a cation exchange layer and an anion exchange layer. The junction of the cation exchange layer and the anion exchange layer is a water layer, and under the action of an external DC electric field, the water in the water layer is split into H and OH-, and pass through the cation exchange layer and the anion exchange layer respectively, and with the long-term use of the bipolar membrane, the bipolar membrane will be polluted by suspended solids or impurities that may exist in the water. Once these pollutants are adsorbed on the bipolar It is easy to affect its use effect on the membrane, so that its separation effect is affected, and the existing electrodialyzer generally lacks a cleaning device for the bipolar membrane, so there are deficiencies and cannot meet the needs of users. Therefore, it is necessary to further improve

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