Electro-Fenton reactor and reaction method for treating organic wastewater

A technology of organic wastewater and reactors, applied in chemical instruments and methods, water/sewage treatment, special compound water treatment, etc., can solve the problems of low generation rate, short electrode life, difficult to scale up, etc., and achieve high production efficiency, High processing efficiency and easy to scale up effects

Inactive Publication Date: 2016-12-14
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of electro-Fenton reactor and reaction method for processing organic waste water, aim to solve conventional negative electrode such as graphite, activated carbon fiber and gas diffusion electrode (GDE) and exist H 2 o 2 The generation rate is small, it cannot meet the needs of wastewater treatment, it is difficult to scale up, and the electrode life is short

Method used

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  • Electro-Fenton reactor and reaction method for treating organic wastewater
  • Electro-Fenton reactor and reaction method for treating organic wastewater
  • Electro-Fenton reactor and reaction method for treating organic wastewater

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preparation example Construction

[0044] The preparation technology of carbon black-polytetrafluoroethylene coated graphite particle comprises the steps:

[0045] (1) Mix carbon black, polytetrafluoroethylene emulsion, and water, and stir electrically at a speed of 500 rpm for 0.5 h to obtain a mixed solution A1;

[0046] (2) adding flake graphite into the mixed solution A1, and electric stirring at a speed of 800 rpm for 2 hours to obtain the mixed solution B1;

[0047] (3) Transfer the mixed solution B1 to a vacuum rotary evaporator, evaporate at 60°C until there is no obvious water, then raise the temperature to 90°C, and rotary evaporate for 1 hour to obtain substance A1;

[0048] (4) put substance A1 into a muffle furnace for calcination at 360° C. for 2 hours, and obtain substance B1 after cooling;

[0049] (5) Mix carbon black, polytetrafluoroethylene emulsion, water, and surfactant Triton X-100, and stir electrically at a speed of 500 rpm for 0.5 h to obtain a mixed solution A2;

[0050] (6) Add the ...

Embodiment 1

[0058] use as figure 1 The shown electro-Fenton reactor prepares acidic hydrogen peroxide solution. The specific test conditions are as follows: the anode is a titanium-coated lead dioxide electrode (80×70mm), and the apparent area of ​​the electrode is 30cm 2 , nylon diaphragm, nickel cathode collector plate, three-dimensional cathode is made of carbon black-polytetrafluoroethylene coated graphite particles filled in cathode frame 2 (filling density 0.6g / cm 3 ), the size of the cathode frame 2 is 70×80×14mm, and the effective volume is 50×60×14mm. Carbon black-polytetrafluoroethylene coated graphite particles select carbon black as Vulcan X-72R, polytetrafluoroethylene emulsion concentration is 60wt%, flake graphite particle size is 40 mesh, carbon black, polytetrafluoroethylene emulsion, water, TritonX The dosage ratio of -100 and flake graphite is 14g: 25ml: 1.1L: 0.5ml: 330g. Cycle electrolysis 800ml 0.05M Na with pH 3 2 SO 4 solution, Na 2 SO 4 The mixture of solut...

Embodiment 2

[0060] use as figure 1 The electro-Fenton reactor shown treats simulated wastewater with Reactive Brilliant Red X-3B. The specific test conditions are as follows: the anode is a titanium-coated lead dioxide electrode (80×70mm), and the apparent area of ​​the electrode is 30cm 2 , nylon diaphragm, nickel cathode collector plate, three-dimensional cathode is made of carbon black-polytetrafluoroethylene coated graphite particles filled in cathode frame 2 (filling density 0.6g / cm 3 ), the size of the cathode frame 2 is 70×80×14mm, and the effective volume is 50×60×14mm. Carbon black-polytetrafluoroethylene coated graphite particles select carbon black as Vulcan X-72R, polytetrafluoroethylene emulsion concentration is 60wt%, flake graphite particle size is 40 mesh, carbon black, polytetrafluoroethylene emulsion, water, TritonX The dosage ratio of -100 and flake graphite is 14g: 25ml: 1.1L: 0.5ml: 330g. Circulating electrolysis of 800ml 123mg / L reactive brilliant red X-3B simulat...

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Abstract

The invention discloses an electro-Fenton reactor and reaction method for treating organic wastewater. The electro-Fenton reactor comprises an anode, a diaphragm, a three-dimensional cathode and a cathode collector plate, which are assembled by bolts to form the plate-and-frame electro-Fenton reactor. When the electro-Fenton reaction method is used for treating organic wastewater, the organic wastewater and oxygen-containing gas are introduced into a three-dimensional-cathode-filled cathode frame; and after a direct current is introduced between the electrodes, oxygen at the cathode is reduced to generate hydrogen peroxide, and the hydrogen peroxide and external ferrous ions or ferrous ions generated by the anode are subjected to Fenton reaction under acidic conditions to generate strong-oxidizing-property hydroxy free radicals which are used for oxidative degradation of organic pollutants. The electro-Fenton reactor and reaction method have the advantages of high hydrogen peroxide generation efficiency and high organic wastewater treatment efficiency, and can easily implement scale-up production.

Description

technical field [0001] The invention belongs to the technical field of organic wastewater treatment, and in particular relates to an electric Fenton reactor and a reaction method for treating organic wastewater. Background technique [0002] When electro-Fenton method degrades organic pollutants, H 2 o 2 The cathode material is generated on site, so the cathode material is a key factor affecting the treatment effect of the electro-Fenton method. The commonly used cathodes are graphite, activated carbon fiber and gas diffusion electrode (GDE). There are two main problems with these cathodes: first, the H 2 o 2 The generation rate is small and cannot meet the needs of wastewater treatment, such as graphite and activated carbon fiber electrodes. Second, it is difficult to scale up, such as GDE, when the height of GDE is greater than 0.25m, the gas-liquid two-phase pressure imbalance will cause the liquid phase to infiltrate the gas chamber at the lower part of the electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46C02F1/72C02F1/74
CPCC02F1/4672C02F2305/026
Inventor 雷阳明刘鸿黄秋云宋诚王厦
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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