Method and device for preparing faintly acid disinfectant fluid by diaphragm-free electrolysis

Abstract

The invention belongs to the technical field of electrochemistry and provides a method and device for producing weakly acidic disinfectant water by electrolysis without a diaphragm. The device includes an electrolytic cell, a power supply and a first dilution tank, and the electrolytic cell is placed above the first dilution tank And the two can be connected, the power supply is connected to the two electrode plates placed in the electrolytic tank, the electrolytic tank is a chamber structure and there is no diaphragm between the two electrode plates. The electrolytic cell adopts a one-chamber structure without diaphragm, the electrolyte concentration is 3% hydrochloric acid solution, the electrolysis adopts low voltage (2~3V), and further utilizes the chlorine-containing gas generated by electrolysis, which is non-polluting to the environment and has a simple structure. , easy maintenance and operation, and low cost. Compared with the electrolyzer device with diaphragm, it saves about 60% of cost and 50% of water, and has high practical value.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a method and a device for preparing weakly acidic disinfectant water by electrolysis without a diaphragm. Background technique [0002] At present, the domestic research and production of disinfection water equipment basically adopts a diaphragm electrolyzer, that is, the space inside the electrolyzer is divided into two halves by a permeable membrane that can permeate ions, and the positive and negative electrodes are placed in the separated electrolyzer. The solution is salt solution. Inject a certain concentration of salt solution into the electrolytic cell, and the electrolytic reaction occurs through the current of the positive and negative electrodes, and strong acidic water is generated on the positive side, and strong alkaline water is generated on the negative side. Although the diaphragm electrolysis method can produce Strongly acidic disinfectant ...

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Problems solved by technology

Inject a certain concentration of salt solution into the electrolytic cell, and the electrolytic reaction occurs through the current of the positive and negative electrodes, and strong acidic water is generated on the positive side, and strong alkaline water is generated on the negative side. Although the diaphragm electrolysis method can produce Strongly acidic disinfectant water with low pH value (pH<3, high potential ORP≥1100mV) and high available chlorine content (ACC=40~100ppm), but it has the following defects: First, strong alkaline water is produced on the negative electrode side. Alkaline water does not have bactericidal properties, and is generally discarded, resulting in a loss of 50% of the utilization rate of tap water; the second is the electrolytic cell with a diaphragm, which has a complex structure, is prone to failure, and has high manufacturing and maintenance costs; the third is the electrolysis process. Various chlorine-containing gases are easy to diffuse out, produce pungent odor, and cause pollution to the environment; fourth, the chlorine-containing gases generated during the electrolysis process are not reused; fifth, the electrolysis voltage generally adopts 8-20V, which consumes a lot of power and wastes energy

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