Electrolysis method and device for self-cleaning carbon electrode

An electrolysis method and carbon electrode technology, applied in the field of electrochemical electrolysis, can solve problems such as current or voltage rise, affect electrolysis efficiency, and consume energy, and achieve the effects of eliminating concentration polarization, avoiding power consumption, and improving utilization efficiency

Inactive Publication Date: 2012-12-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electro-redox conversion usually uses a lower current density, such as less than 100A / m 2 , there are often polymers attached to the electrode surface, which affects the electrolysis efficiency
In addition, as the electrolysis proceeds, the materials near the electrolysis will continue to be consumed, and the current or voltage will continue to rise, resulting in concentration polarization and increased power consumption.
In the industry, forced turbulence or enhanced stirring are often used to eliminate, but it also consumes energy

Method used

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  • Electrolysis method and device for self-cleaning carbon electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] As shown in the attached figure, the electrolysis of the self-cleaning carbon electrode adopts a periodic steering electrolysis device, including: an electrolytic cell 4, a periodic steering controller 3, and a DC power supply system 1. The positive and negative electrodes of the electrolytic cell are carbon electrodes, and the periodic steering The controller realizes the cyclic operation of energization-disconnection-turning energization-disconnection. The carbonaceous electrode is graphite, with a thickness of 5mm and a distance of 1mm. Equipped with a bubbling device, the material is stirred by air bubbling. The DC power supply system is a DC power supply that converts AC to DC. The cycle steering controller is produced by Beijing Fengyuan Tenglong Technology Development Co., Ltd.

[0033] Electrolysis method: 1) Introduce the material dye industrial wastewater into the electrolytic cell 4, the COD is 1.5g / L, the conductivity of the electrolyzed material is 0.1S / m, a...

Embodiment 2

[0036] The difference from Example 1 is that the distance between the carbonaceous electrodes is 5 mm, and 5 sets of pole plates are placed on the electrodes.

[0037] In the electrolysis method, the conductivity of the electrolytic material is adjusted to 0.4S / m with sodium sulfate, and the pH value is adjusted to 1.5 with sodium hydroxide; the cycle is adjusted to the controller, the cycle is 60 seconds, and the ratio of disconnection time to energization time is 1 : 3; electrolytic current density is 15A / m 2 .

[0038] After 4 hours of electrolysis, take out the middle electrode plate, you can see that one side of the electrode is the same as the new electrode, and there is polymer adsorption on the other side.

Embodiment 3

[0040] The difference from Example 1 is that the distance between the carbonaceous electrodes is 10 mm, and 10 sets of pole plates are placed on the electrodes.

[0041] In the electrolysis method, the conductivity of the electrolytic material is adjusted to 0.9S / m with sodium sulfate, and the pH value is adjusted to 4.5 with sodium hydroxide; the cycle is adjusted to the controller, the cycle is 120 seconds, and the ratio of disconnection time to energization time is 1 : 6; electrolytic current density is 35A / m 2 .

[0042] After 6 hours of electrolysis, take out the middle electrode plate, you can see that one side of the electrode is the same as the new electrode, and there is polymer adsorption on the other side.

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Abstract

The invention relates to an electrolysis method and device for a self-cleaning carbon electrode, and belongs to the technical field of electrochemistry electrolysis. A periodic swerving electrolysis device is adopted and comprises an electrolytic cell, a periodic swerving controller and a direct-current power supply system, wherein the positive electrode and the negative electrode of the electrolytic cell are carbon electrodes, and the periodic swerving controller can be used for realizing the circular operations of electrifying, switching off, carrying out swerving electrification and switching off. The electrolysis method comprises the following steps of: 1) introducing materials into the electrolytic cell, wherein the electric conductivity of electrolysis material is more than 0.1S/m; 2) regulating the periodic swerving controller; and 3) electrifying to carry out electrolytic oxidation and reduction reaction. According to the method and the device disclosed by the invention, the carbon electrode can be cleaned by self in the electrolytic oxidation and reduction process, concentration polarization is lowered, the electrolysis efficiency is improved, the electrolysis energy consumption is lowered, and industrial implementation is easily carried out.

Description

technical field [0001] The invention relates to the technical field of electrochemical electrolysis, in particular to an electrolysis method and device for self-cleaning carbon electrodes. technical background [0002] The basic principle of electrochemical electrolysis water treatment technology is to generate hydroxyl radicals (OH), ozone (O 3 ), hydrogen peroxide (H 2 o 2 ), hypochlorite (ClO - ), Chlorine (Cl 2 ) or atomic oxygen and other strong oxidants, and then degrade the pollutants in the wastewater. Electrochemical electrolysis technology is an advanced oxidation technology. As an "environmentally friendly technology", electrochemical electrolysis treatment has been widely studied and applied in the treatment of some refractory biodegradable pollutants. As a cleaning treatment process, electrochemical electrolysis is highly flexible and can be applied alone or in combination with other treatment methods. [0003] Electrochemical electrolysis is an oxidation-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
CPCY02W10/37
Inventor 吴玉凯艾庆祝唐崇新王立忠张衍文倪秀军李明穆道斌刘厚丽丁春淡
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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