Application method of high-property activated carbon fibers in treatment of industrial waster water by electrocoagulation

Abstract

The invention discloses an application method of high-property activated carbon fibers in the treatment of industrial waster water by electrocoagulation. In the application method, the industrial waster water is treated by the electrocoagulation, the high-property activated carbon fibers are used as an electrode for electrolysis and has a composition of activated carbon. The high-property activated carbon fiber electrode has the advantages of high electrolysis efficiency, wide application range, low use cost and no secondary pollution, and is beneficial to water reuse treatment by reverse osmosis, thus the high-property activated carbon fibers have an extremely giant application prospect in the process of treating industrial waster water by high-frequency high-voltage impulse electrocoagulation.

Description

technical field [0001] The invention relates to the treatment of industrial wastewater, in particular to an application method of high-performance activated carbon fiber in the treatment of industrial wastewater by electrocoagulation. Background technique [0002] Activated carbon is a kind of microcrystalline carbon material. Like diamond and graphite, it is an isotropic body of carbon element and a form of carbon element. Activated carbon has a microcrystalline structure similar to a honeycomb, and its microcrystals are arranged irregularly. There are a large number of pores invisible to the naked eye in the crystal gram, so it has a large inner surface, and its specific surface area is 500-1700㎡ / g. This structural characteristic determines that activated carbon has strong adsorption performance and conductive area, and can absorb liquid or solid on its surface. For liquid, the quality of the adsorbed substance is almost close to the quality of activated carbon itself. Ge...

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Problems solved by technology

Good electrical conductivity and other advantages, and in the electrolysis process can produce divalent iron or aluminum flocs to help better flocculation and precipitation, but there are also insurmountable shortcomings: 1. Iron or aluminum metal electrodes in Dissolution will occur during electrolysis, especially when high voltage is required to reduce certain ions, high frequency and high voltage will dissolve metal electrodes more violently and faster, and then produce iron or aluminum oxides in the electrolyte

In order to remove these metal oxides, it is necessary to add alkaline substances to produce alkaline metals, so that they can survive in the electrolytic solution and precipitate metal hydroxides, which results in a large amount of chemical deposits commonly known as sludge, which makes the wastewater treatment process The waste generated in the process increases, resulting in secondary pollution in the water treatment process

[0006] 2. During the electrocoagulation electrolysis process of high-frequency and high-voltage pulses, due to the generation of a large amount of oxygen on the surface of the anode during the electrolysis process, the metal electrodes of iron or aluminum are prone to surface passivation, resulting in a further reduction in electrolysis efficiency, which affects wastewater treatment. Effect

[0007] 3. After the harmful components in the industrial wastewater are treated, a certain amount of iron or aluminum ions will remain in the water, which brings great difficulties to the further use of reverse osmosis for the reuse of reclaimed water

[0008] 4. The dissolution of iron or aluminum metal electrodes in the process of electrocoagulation and electrolysis causes a large consumption of metal materials, resulting in a high loss rate of metal electrodes, which greatly increases the use cost of electrodes

[0009] 5. The electrode made of molded carbon, although insoluble and non-passivating, has poor conductivity and cannot be used as a conductive electrode. Graphite should be used as a conductive electrode, because the molded carbon is a mixture of carbon powder and clay. It is sintered, the production process is complicated, the cost is high, the proportion of carbon powder and clay is small, the strength is poor, the conductivity is low, and its conductivity is lower than that of carbon powder; soaking in water for a long time will loosen, and carbon powder and clay The composition ratio is large, the strength increases, but the resistivity also increases, the conductivity decreases, and the power consumption increases at the same time, so it cannot be used as a conductive electrode

[0010] 6. Graphite is used as a conductive electrode, which has good conductivity, but its service life is short. Graphite is made of carbon powder pressed at high pressure. When it is soaked in an industrial wastewater electrolyzer, because there will be chlorine in the wastewater, graphite will conduct electricity for a while. Time will make the graphite loose, so it needs to be replaced frequently, which will increase the cost

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