Electrodialysis membrane stack electrode detection method and device and water purification equipment

Abstract

The invention discloses an electrodialysis membrane stack electrode detection method, an electrodialysis membrane stack electrode detection device and water purification equipment. The detection method comprises the following steps: acquiring water temperatures before and after electrification of an electrodialysis membrane stack; comparing water temperatures before and after the electrodialysis membrane stack is electrified to obtain a water temperature difference; and judging whether the electrode of the electrodialysis membrane stack is abnormal according to the water temperature difference. The problems that in the frequent water purification process of an electrodialysis membrane stack, along with current changes in the water purification process, activated carbon coatings on the surfaces of electrode plates at the two ends of the electrodialysis membrane stack gradually fall off, after the coatings fall off, the salt removal rate of the electrodialysis membrane stack is abnormal, the salt removal rate of electrodialysis cannot meet the requirement, and the salt removal rate of the electrodialysis membrane stack is influenced are solved. According to the detection method, whether the electrode of the electrodialysis membrane stack is abnormal or not is judged by obtaining the water temperatures before and after the electrodialysis membrane stack is electrified and comparing the water temperature change amplitudes before and after the electrodialysis membrane stack is electrified, the method is simple and easy to implement, and the electrodialysis membrane stack is conveniently replaced in time subsequently, so that the electrodialysis desalination rate is guaranteed.

Description

technical field [0001] The invention relates to the technical field of water purification, in particular to an electrodialysis membrane stack electrode detection method, device and water purification equipment. Background technique [0002] EDR (Electroosmosis, electrodialysis) applied to water purification equipment such as household water purifiers has the following advantages: fresh water quality can be adjusted; recovery rate is high, and the ratio of purified water output can reach 90%. Based on the above advantages, electrodialysis has great application potential in the field of water purification. [0003] However, for the EDR membrane stack, in the frequent water purification process, the electrode sheets at both ends of the EDR membrane stack will have a certain impact with the change of the current during the water purification process. With the long-term water purification process, the activated carbon coating on the electrode sheets at both ends of the EDR membr...

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Problems solved by technology

[0003] However, for the EDR membrane stack, in the frequent water purification process, the electrode sheets at both ends of the EDR membrane stack will have a certain influence with the change of the current during the water purification process.

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