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Novel three-dimensional electrode water treatment system and graphene conductive particle preparation method

A water treatment system, three-dimensional electrode technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. The efficiency and treatment effect are reduced, and the problems such as "dead corners" are not considered, so as to achieve the effect of perfect sewage treatment system, improved degradation effect and strong corrosion resistance

Pending Publication Date: 2019-05-31
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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Problems solved by technology

The existing three-dimensional electrode reactor structure is mainly in the shape of a cube. For example, the utility model patent with the authorized announcement number CN205616601 U discloses a three-dimensional electrode synergistic ultraviolet photocatalytic reactor, which uses a square structure electrolytic cell to electrochemically treat wastewater. The size of the tank is 14cm×12cm×20cm; the invention patent with the authorized notification number CN103449563B discloses the method of visible light photoelectric catalysis and three-dimensional electrode / electro-Fenton to remove organic matter, and the three-dimensional electrode structure of the cuboid electrolytic cell is also used. It is convenient in structure and processing, but the disadvantage is that it does not take into account the "dead angle" in the process of water flow, which leads to the reduction of current efficiency and treatment effect
The selection of particle electrodes is a hotspot in the research of three-dimensional electrode technology. For example, the patent application number 201710035738.5 discloses a preparation method of a kaolin-based three-dimensional electrode using a kaolin-based particle electrode. The activated carbon particle electrode is used in the CN103449563B patent, which is different from the traditional particle electrode. Compared with other materials, graphene material, as a new type of nanomaterial, has the characteristics of large specific surface area, high electrical conductivity, thermal conductivity, and rich pore structure, and has a large contact area with pollutants, and its excellent electrical conductivity can reduce energy consumption. , can be used as a new type of three-dimensional particle electrode, but no application has been seen
In addition, the authorized notification number CN202508948U discloses a continuous flow-through three-dimensional electrode and photocatalytic combined reaction device for water sterilization, which combines the three-dimensional electrode and photocatalytic for sterilization, but this patent does not take into account the influence of influent turbidity on the treatment effect effects, and loss of filled particle electrodes under aeration and water flow conditions

Method used

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  • Novel three-dimensional electrode water treatment system and graphene conductive particle preparation method

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preparation example Construction

[0040] 3) Preparation of graphene hydrogel: add a certain amount of nano-ferric oxide or nano-cobalt tetroxide or nano-nickel oxide or nano-manganese dioxide to the second-level mixed solution in step 2 to obtain the third-level mixed solution, and for the third-level The mixed solution is dispersed by mechanical stirring and ultrasonic vibration to obtain the quaternary mixed solution. The quaternary mixed solution is placed in the reactor, and the reactor is kept at 200-300°C for 36-48 h. Graphene hydrogel can be obtained after cooling;

[0041] 4) Preparation of metal-loaded graphene: freeze-dry the graphene hydrogel prepared in step 3 to obtain metal-loaded graphene.

specific Embodiment 1

[0042] Specific embodiment one: Degradation treatment of 4-chlorophenol wastewater: 4-chlorophenol wastewater enters the sand filter filter 1 from the first water inlet 1-1, and the manganese sand filter material traps suspended particles and part of organic matter in the wastewater in the sand filter In the filter 1, the water filtered by the sand filter 1 flows into the three-dimensional electrode reactor 2 through the first water pump 7. The three-dimensional electrode reactor 2 adopts a cylindrical structure with a bottom diameter of 0.8m and a height of 1.1m. It is made of stainless steel Processing is made, and the middle part of three-dimensional electrode reactor 2 is erected with the cylindrical rod-shaped anode 3 of Ti / IrO2-Ta2O5 material, and the diameter of bottom surface is 10cm, and the sidewall thickness of three-dimensional electrode reactor 2 is 10cm, as cathode 4, anode 3 and The cathode 4 is respectively connected to the positive and negative poles of the DC ...

specific Embodiment 2

[0044] Specific embodiment two: treatment of 2,4,6-trichlorophenol waste water: on the basis of the structure of specific embodiment one, the particle electrode 6 selects the quartz sand insulating particle that fills by the ratio of 1:1 and the graphene that loads nickel conducts electricity Particles, the anode uses Ti / IrO 2 -SnO 2 -PdO cylindrical rod-shaped electrode, the diameter of the bottom surface is 12cm, the side wall of the three-dimensional electrode reactor 2 is made of stainless steel, and the thickness is 5cm, as the cathode 4, the initial concentration is 50mg / L 2,4,6-Trichlorophenol wastewater in turn The sand filter 1 is used to filter suspended particles and some organic matter in wastewater, the electrolytic treatment system is used to perform electrolytic treatment of organic pollutants and the adsorption and precipitation treatment of heavy metals, and the organic pollutant treatment system is used to carry out ultraviolet photocatalytic degradation of o...

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Abstract

The invention discloses a novel three-dimensional electrode water treatment system and graphene conductive particle preparation method. The novel three-dimensional electrode water treatment system comprises a pretreatment system, an electrolytic treatment system and an organic contamination treatment system which are sequentially communicated, the pretreatment system performs sand filtering treatment on sewage through a sand filter, the water inlet turbidity is lowered, the electrolytic treatment system electrolyzes organic contaminations and adsorbs sediment heavy metal through the three-dimensional electrode reactor, the organic contamination treatment system further degrades organic contaminations through ultraviolet catalysis, the sewage treatment system is perfect, and the purifying effect is remarkable. The cylindrical three-dimensional electrode reactor is adopted, a coating titanium electrode is selected as an anode, the treatment efficiency and the current utilization efficiency can be improved, and electric energy consumption is low, insulation particles and conductive particles filled proportionally are selected as particle electrodes, the insulation particles can solvethe problem of short-circuit current of the three-dimensional electrode reactor, and the metal-loaded graphene conductive particles can remarkably improve the wastewater degrading effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a novel three-dimensional electrode water treatment system and a method for preparing graphene conductive particles. Background technique [0002] Chlorinated organics are commonly used in the production and use of herbicides, fungicides, and dyes. Conventional methods for dealing with chlorinated organics include biodegradation, adsorption, and advanced oxidation. It is widely used in the treatment and degradation of chlorinated organic compounds, especially the three-dimensional electrode technology has the advantages of high mass transfer efficiency, high treatment efficiency and low energy consumption, and has become an important electrochemical oxidation technology. [0003] The three-dimensional electrode is filled with particle-like or debris-like working electrode materials between the cathode and anode of the two-dimensional electrode, and the surface of the par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F101/36C02F101/34
Inventor 徐斌张毅敏朱月明张书陵皋海岭张志伟吴文倩
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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