Method and device for regenerating activated carbon by virtue of pulse discharge plasma

Abstract

The invention provides a method and device for regenerating activated carbon by virtue of pulse discharge plasma. The device comprises a pulse power supply, a reactor and a carrier gas system, wherein the reactor comprises an upper cover, an outer cylinder and a pedestal, and the outer cylinder is located between the upper cover and the pedestal and are connected each other; the output terminal of the pulse power supply is connected with the high-voltage terminal wiring port of the upper cover and the output terminal of the carrier gas system is connected with the gas inlet of the upper cover; the outer cylinder is internally and sequentially provided with high-voltage electrodes, an activated carbon placement layer and a ground electrode; activated carbon is paved on the nylon net of the reactor, water is injected into the reactor and the reactor is sealed; a gas pump of the carrier gas system is started, a flow meter is adjusted and the circuit of the system is closed; the pulse power supply is started and parameters are adjusted so that streamer discharge is formed between the high-voltage pin electrode and the ground electrode; the circuit of the system is disconnected, the gas pump is turn off, the outer cylinder is opened to take the activated carbon out, the activated carbon is washed with deionized water and dried to obtain the regenerated activated carbon. According to the device and the method, by the pulse discharge technology, organic pollutants adsorbed on activated carbon are degraded so as to achieve the regeneration of activated carbon.

Description

technical field [0001] The invention relates to the technical field of chemical adsorption separation and pollutant control, in particular to a method and device for regenerating activated carbon with pulse discharge plasma. Background technique [0002] Resources are the lifeblood of human survival and development. As a traditional and modern man-made resource, activated carbon (AC) has been widely used in various aspects of industrial and agricultural production since it came out more than 100 years ago. At present, in the field of environmental protection and industry, AC is widely used as an adsorbent for the adsorption of organic pollutants. However, the saturated AC is usually discarded, buried or burned, resulting in waste of resources and secondary pollution. The adsorption of AC is mainly physical adsorption, that is, through interphase transfer, the pollutants are transferred from the solution phase to the solid phase (on AC), and there is no degradation and remov...

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Problems solved by technology

For example, the electric furnace thermal regeneration process of AC has the advantages of high regeneration efficiency and no selectivity to adsorbate, but the carbon loss in this regeneration process is large, the mechanical strength decreases after AC regeneration, the specific surface area decreases, and the required equipment is more complicated. The cost is high; the equipment and process of AC biological regeneration are simple, but the regeneration speed is slow, the regeneration time is long, the recovery of AC adsorption capacity is limited, and it cannot be used to regenerate AC that has adsorbed difficult-to-biodegradable organic pollutants; solvent method regenerates AC The loss is small, but the regeneration is not thorough, and it is easy to cause micropore blockage, and the AC adsorption performance after multiple regenerations is significantly reduced, and this method is highly targeted, and is not suitable for the desorption of AC that adsorbs a wide variety of pollutants, etc.

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