Triphase AC sliding arc non-balancing plasma sewage treating apparatus

Abstract

The triphase AC sliding arc non-balancing plasma sewage treating apparatus includes one triphase AC high voltage power source, one water cooled glass reaction kettle, three knife metal electrodes connected separately to three phase line of the triphase AC plasma power source, one insulating cover, one atomizing nozzle and other parts. The sewage from the sewage source and the carrier gas from the carrier gas source are sprayed in the atomizing nozzle to form gas-liquid mixture entering to the water cooled glass reaction kettle, and the gas-liquid mixture drives the high voltage puncture arc to slide fast downstream and to form sliding pulse arc discharge in the surface of the electrodes, so as to generate non-balancing plasma including O, OH, H2O2, HO2., H, other active particles, ultraviolet ray, etc to degrade organic pollutants in sewage.

Description

technical field [0001] The invention relates to a three-phase AC sliding arc unbalanced plasma sewage treatment device, which belongs to the field of environmental technology and water treatment. Background technique [0002] Compared with the application of plasma technology in the field of waste gas treatment, non-equilibrium plasma (or non-thermal plasma) started late in water treatment. Due to its unique advantages and good pollutant removal efficiency, it has shown a good The application prospect has gradually become a research hotspot. Non-equilibrium plasma can be generated by glow discharge, corona discharge, pulse discharge, dielectric barrier discharge and non-thermal arc discharge. In 1902, AyrtonH. published the voltage-current characteristics of the free non-thermal arc of carbon electrodes in the atmosphere, and listed the reference range of this free non-thermal arc; The sliding arc discharge device for cooling the arc produces atmospheric pressure non-therm...

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Problems solved by technology

In China, the research on sliding arc discharge is in its infancy, and there is some research on the physical characteristics of sliding arc discharge. For example, Lin Lie et al. have developed magnetically driven sliding arc discharge atmospheric pressure non-equilibrium plasma (Chinese patent 97111936.8), and the research mainly focuses on In terms of the physical characteristics of the sliding arc discharge driven by DC pure airflow; Xia Weidong et al. carried out a study on the discharge characteristics of the DC two-electrode magnetically driven sliding arc (Li Lei, Xia Weidong, et al. Nuclear Technology. 2004, 27(5): 350-353. ); but there is little research on the control of pollutants, mainly Du Changming and others carried out the research of single-phase AC sliding arc discharge, and applied it to the removal of polycyclic aromatic hydrocarbons and carbon black particles in exhaust gas (Du Changming, et al. China Chinese Journal of Electrical Engineering. 2006, 26(1): 77-81.), the research shows that single-phase AC sliding arc discharge has the disadvantages of small discharge area and small processing capacity.

So far, reviewing domestic and foreign literature and materials, there is no research or report on three-phase AC sliding arc non-equilibrium plasma treatment of sewage

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