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Electro-Fenton composite oxidation device and method for degrading organic pollutants in high-chlorine-content sewage

A technology of organic pollutants and composite oxidation, which is applied in the direction of water pollutants, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of complex preparation, easy loss of iron salt, and poor electrode recyclability, so as to increase biochemical Sexuality, COD reduction effect

Active Publication Date: 2022-02-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method faces the problems of easy loss of iron salt, poor electrode recyclability and complicated preparation.

Method used

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  • Electro-Fenton composite oxidation device and method for degrading organic pollutants in high-chlorine-content sewage
  • Electro-Fenton composite oxidation device and method for degrading organic pollutants in high-chlorine-content sewage

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Embodiment 1

[0041] Such as figure 2 As shown, this embodiment provides an electric Fenton compound oxidation device for degradation of organic pollutants in high chlorine-containing sewage, the device is a plate-and-frame electrolyzer without a diaphragm, and the plate-and-frame electrolyzer without a diaphragm includes a shell Body 5, anode 2, cathode 1, water inlet 3, water outlet 4 and aeration tube 6, the anode 2 is a ruthenium iridium titanium electrode, the cathode 1 is a gas diffusion electrode, and the gas diffusion electrode includes: a catalytic layer , current collector and diffusion layer; the material used in the catalytic layer is carbon nanotube; the current collector is titanium mesh; the material used in the diffusion layer is polytetrafluoroethylene. Both the anodes 2 and the cathodes 1 are four, and are alternately arranged in a plate-and-frame electrolytic cell without a diaphragm. The aeration pipe 6 is arranged at the bottom of the plate-and-frame electrolytic cell...

Embodiment 2

[0043] This embodiment provides a method for electro-Fenton composite oxidation for the degradation of organic pollutants in high-chlorine sewage. The device of complex oxidation, the high chlorine-containing sewage used in the present embodiment is dye waste water, and the present embodiment comprises the following steps:

[0044] Pass the dye wastewater into the plate-and-frame electrolytic cell without a diaphragm, the flow rate of the dye wastewater is 10L / h, start the constant-current stabilized power supply, and set the current density to 10mA / cm 2 , using the aeration pipe 6 to feed air into the device to degrade the dye wastewater. The air-to-water ratio of the amount of air that the aeration pipe 6 feeds into the plate-and-frame electrolytic cell without a diaphragm to the amount of dye wastewater in the plate-and-frame electrolytic cell without a diaphragm is 1:10. The reaction conditions of the degradation treatment are alkaline conditions with a pH of 9. The chlo...

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Abstract

The invention discloses an electro-Fenton composite oxidation device and an electro-Fenton composite oxidation method for degrading organic pollutants in high-chlorine-content sewage. The device is a diaphragm-free plate frame type electrolytic cell, wherein the diaphragm-free plate frame type electrolytic cell comprises a shell, an anode, a cathode, a water inlet, a water outlet and an aeration pipe, the anode is a high-chlorine-evolution-activity electrode, and the cathode is a gas diffusion electrode. The method comprises the following steps: introducing the high-chlorine-content sewage into the diaphragm-free plate frame type electrolytic cell, starting a constant-current voltage-stabilized power supply, and introducing oxygen and / or air into the device by using an aerator pipe to degrade the high-chlorine-content sewage. According to the method, an iron salt catalyst does not need to add, iron-containing sludge is not generated, and the sewage does not need to be adjusted to acidic. Under the same treatment water quality and the same operation conditions, a dosage of an agent can be reduced by 70-100%, and a residual sludge amount can be reduced by 50% or more.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and more specifically relates to an electro-Fenton compound oxidation device and method for degrading organic pollutants in high chlorine-containing sewage. Background technique [0002] Electro-Fenton technology, due to the in-situ reduction of oxygen at the cathode to generate H 2 o 2 (Equation-1), thus avoiding H 2 o 2 Long-distance transportation and storage problems. In addition, the in situ generated H 2 o 2 Under the action of adding iron salt, Fenton reaction occurs, which produces highly reactive oxygen free radicals and has strong oxidizing properties. The current of the electric Fenton is controllable, which can solve the H problem faced by the conventional Fenton reaction. 2 o 2 The disadvantages of excessive dosage and difficult control of the reaction process. Therefore, as an emerging electrochemical technology, electro-Fenton technology has attracted extensive attention fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/36
CPCC02F1/46104C02F1/4672C02F2101/36C02F2001/46166C02F2001/46142C02F2201/4616C02F2201/4619C02F2305/023C02F2209/08C02F2303/06
Inventor 司艳晓徐孝轩党伟胡长朝谭文捷
Owner CHINA PETROLEUM & CHEM CORP