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Insulation particles of three-dimensional electrode reactor and preparation and application method thereof

A technology of insulating particles and three-dimensional electrodes, which is applied in chemical instruments and methods, insulators, electrochemical water/sewage treatment, etc. Limitations and other issues to achieve the effect of shortening the migration distance, increasing the effective electrode area, and low thermal expansion coefficient

Inactive Publication Date: 2014-05-07
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, cellulose acetate is soluble in many common solvents, not only in aniline, phenol, methylene chloride, tetrachloroethane and other solvents, but also in some mixed solvents (such as acetone and ethanol, methylene chloride and ethanol) , the chemical thermal stability and compactness of cellulose acetate are poor, and it is easy to degrade, and it will be hydrolyzed under the conditions of acid or alkali catalysis (Zhou Gongdu, Chemical Dictionary, 2004, 722.)
In addition, the combination of cellulose acetate film and activated carbon and other carriers is not firm, and it is easy to fall off, thus losing the effect (Research on the degradation of phenol wastewater by bipolar loaded three-dimensional particle electrodes, Master's Thesis of Tongji University, 2006, 12-13), it can be seen that, Insulating particles made of cellulose acetate coated activated carbon not only have a short service life, but also greatly limit their application range

Method used

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  • Insulation particles of three-dimensional electrode reactor and preparation and application method thereof
  • Insulation particles of three-dimensional electrode reactor and preparation and application method thereof

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preparation example Construction

[0026] A method for preparing insulating particles of a three-dimensional electrode reactor, the steps comprising:

[0027] (1) Pretreatment of the particle electrode: Soak the particle electrode after removing surface dirt in distilled water for 8-12 hours, rinse it several times, put it in a beaker, boil it for 10-15 minutes, let it cool down, filter out the water, put it in Dry in an oven for later use;

[0028] (2) Immersion coating, dehydration and cyclization: immerse the particle electrode treated in step (1) in the polyamic acid solution for 0.5-1 hour, after slight stirring, take out the particle electrode and spread it on the screen or glass or Form a polyamic acid film on the surface of the particle electrode on a ceramic plate, then place the particle electrode in a vacuum oven, raise the temperature in the oven to 110°C-150°C and keep it warm for 30-50min to remove the solvent from the particle electrode, continue Raise the temperature in the oven to 220°C-3...

Embodiment 1

[0031] Remove the dirt on the surface of the activated carbon particle electrode with a diameter of 3 mm and a length of 5 mm, soak it in distilled water for 8 hours, rinse it twice, put it in a beaker and boil it for 10 minutes, let it cool down, filter out the water, and dry it in an oven. Add the dried activated carbon particle electrode to the polyimide solution, dip for 0.6h, stir slightly for 2min, continue dipping for 0.2h, take it out and spread it on a stainless steel screen, put it in a vacuum oven, heat up to 110 °C Keep warm for 30 minutes, continue to heat up to 280 °C and keep warm for 60 minutes, take it out and let it cool down to room temperature, then add it to the polyimide solution, repeat the above dipping coating and vacuum drying process once to get polyimide coating activated carbon insulating particles .

Embodiment 2

[0033] Soak the 4mm×4mm×7mm graphite particle electrode in distilled water for 10h to remove the surface dirt, rinse it once, put it in a beaker and boil it for 12min, let it cool down, filter out the water and put it in an oven for drying. Add the dried graphite particle electrode into the polyimide solution, dip for 0.5h, stir gently for 2min, continue dipping for 0.5h, take it out and spread it on a porcelain plate, put it in a vacuum oven, heat up to 120 °C Keep warm for 30 minutes, continue to heat up to 320 °C and keep warm for 90 minutes, take it out and let it cool down to room temperature, then add it to the polyimide solution, repeat the above dipping coating and vacuum drying process once to get polyimide coating graphite insulating particles .

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Abstract

The invention discloses insulation particles of a three-dimensional electrode reactor and preparation and application method thereof. The insulation particles are prepared by polyimide membrane coated particle electrodes with the same materials and the same shapes; and the insulation particles and the particle electrodes are uniformly mixed by mass or volume ratio of 25-35% to 65-75% as bed fillers of the three-dimensional electrode reactor for degrading organic waste water. The insulation particles prepared by the invention are resistant to acid and alkali, wear-resistant, good in insulation effect, long in service life, strong in adaptability and wide in range of application, and can solve the problem of delamination and insulation failure of the particle electrodes and quartz sands, glass balls, plastics and the like, overcome the defects that the acetyl cellulose membrane is low in strength, non-resistant to wear and corrode and easy to dissolve and drop, increase repolarization rate of the particle electrodes in the bed fillers, reduce short circuit current, improve current efficiency, lower electric consumption, and enhance degrading efficiency and treatment effect of the three-dimensional electrode reactor on the organic waste water.

Description

technical field [0001] The invention relates to an insulating particle of a three-dimensional electrode reactor and its preparation and application method, in particular to an insulating particle in a three-dimensional electrode reactor bed filler for degrading organic waste water and its preparation and application method, belonging to water treatment and water treatment. the field of pollution prevention and control. Background technique [0002] With the rapid development of my country's industry, not only the total annual discharge of various types of organic wastewater is increasing rapidly, but also the industrial wastewater containing refractory organic pollutants is increasing. There are more and more refractory toxic organic components contained in industrial wastewater, some of which are even carcinogenic, mutagenic, and distorting organic compounds, which pose an increasing threat and harm to the environment, especially the water environment. In recent years, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B17/56C02F1/46C02F1/461
Inventor 景晓辉寇晓利丁欣宇沈拥军
Owner NANTONG UNIVERSITY
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