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Composite graphite electrode electrolytic redox device and method with self-cleaning function

An electrolytic oxidation, graphite electrode technology, applied in the field of graphite, can solve problems such as current or voltage rise, affecting electrolysis efficiency, energy consumption, etc., to achieve the effect of increasing current intensity, improving flow, and promoting flow

Pending Publication Date: 2018-08-10
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the electric redox conversion usually adopts a lower current density, such as less than 100A / m2, there are often polymers attached to the surface of the electrode, 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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  • Composite graphite electrode electrolytic redox device and method with self-cleaning function
  • Composite graphite electrode electrolytic redox device and method with self-cleaning function

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 The self-cleaning composite graphite electrode electrolytic redox device shown includes a DC power supply system 1, the output end of the DC power supply system 1 is provided with a sliding rheostat 2, and the output end of the sliding rheostat 2 is provided with a cycle steering controller 3. A top plate 4 is provided at the bottom of the periodic steering transmission, an electrolytic electrode 5 is provided at the bottom of the top plate 4, a graphene cell 6 is embedded inside the electrolytic electrode 5, and an electrolytic cell 7 is provided at the bottom of the electrolytic electrode 5 , the electrolytic cell 7 is provided with an electrolyte 8, the two sides of the electrolytic cell 7 are provided with support rods 9, the bottom of the support rod 9 is provided with a bottom plate 10, and the DC power supply system 1 and the sliding rheostat 2 are made of copper The core wires are connected, the DC power supply system 1, the sliding rheostat 2 a...

Embodiment 2

[0027] The difference with embodiment 1 is:

[0028] After electrolytic treatment of fuel industry wastewater, the graphite electrode is taken out and placed in the electrolytic cell 7. At this time, the density of the electrolyte 8 is 1.24g / cm³, the conductivity is greater than 0.2S / m, the pH value is adjusted to 5, and the electrolysis electrode 5 The material is stainless steel, and then 10% sodium hydroxide solution is used to adjust the pH value of the electrolyte 8, and the control cycle is turned to the controller 3, and the cyclic operation of power-on-off-steering is carried out. The time ratio is 1:4, and the current density is 10A / ㎡ when electrified for electrolytic redox reaction;

[0029] After three hours of electrolysis, the graphite electrode was taken out, rinsed with deionized water, and the polymers on the front and back sides of the electrode were observed with a microscope. Turning on the electric operation promotes and improves the flow of charged partic...

Embodiment 3

[0031] The difference with embodiment 2 is:

[0032]After electrolytic treatment of fuel industry wastewater, the graphite electrode is taken out and placed in the electrolytic cell 7. At this time, the density of the electrolyte 8 is 1.3g / cm³, the conductivity is greater than 0.2S / m, the pH value is adjusted to 11, and the electrolysis electrode 5 The material is titanium steel, and then 20% sodium hydroxide solution is used to adjust the pH value of the electrolyte 8, the control cycle is turned to the controller 3, and the cycle operation of power-on-off-turn on-off is performed, and the turn cycle is 200 seconds, the off-time ratio is 1:5, and the current density is 200A / ㎡ when electrified for electrolytic redox reaction.

[0033] After four hours of electrolysis, the graphite electrode was taken out, rinsed with deionized water, and the polymers on the front and back sides of the electrode were observed with a microscope. Turning on the electric operation promotes and im...

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Abstract

The invention discloses a composite graphite electrode electrolytic redox device with a self-cleaning function, comprising a direct-current power system; the output end of the direct-current power system is provided with a slide rheostat; the output end of the slide rheostat is provided with a periodic reverse controller; the bottom of the periodic steering controller is provided with a top plate;the bottom of the top plate is provided with an electrolytic electrode; a graphene cell is embedded in the electrolytic electrode; an electrolytic bath is arranged in the bottom of the electrolytic electrode; electrolyte is arranged in the electrolytic bath; support rods are arranged on two sides of the electrolytic bath; a bottom plate is arranged at the bottom ends of the support rods. The periodic steering controller is used herein to carry out power-on, power-off, reverse to power-on and power-off cyclic operation on a working circuit; pH and electrical conductivity of electrolyte are adjusted; the electrode is enabled to start hydrogen evolution; passivation of a composite electrode plate can be effectively removed, and the polymer attached to the composite graphite electrode is removed.

Description

technical field [0001] The invention relates to the technical field of graphite, in particular to a self-cleaning composite graphite electrode electrolytic redox device and method. Background technique [0002] The basic principle of electrochemical electrolysis water treatment technology is that through the action of an external electric field, in a specific electrochemical reactor, through chemical reactions, electrochemical processes or physical processes, hydroxyl radicals ( OH) and ozone (03) are usually generated. , Hydrogen peroxide (H2O2), hypochlorite (ClO-), chlorine (Cl2) or atomic oxygen and other strong oxidants, and then degrade pollutants in 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 ele...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72
CPCC02F1/4672
Inventor 戴雪飞
Owner DATONG XINCHENG NEW MATERIAL CO LTD