The Development Of The Corona Discharge Plasma Catalysis Of Indoor Air Purifier

In recent years, people’s living standards continue to improve, the living environment are increasingly high requirements. However the haze problem is getting more and more serious, people concerns about air quality to enhance unceasingly, indoor air quality and people life has become a concerned issue.In order to solve the problem of indoor air pollution, to give people a healthy and comfortable indoor environment, people invented all kinds of indoor air purifier, purification of indoor pollutants----inhalable particles, dust and volatile organic compounds.The purpose of this paper is to develop a indoor air purifier using the corona discharge dust (electrostatic precipitator) and plasma discharge catalytic technology. Purifier with ion wind has performance advantages of mute and low consumption. Effectively improve the volatile organic compounds by using the technology of plasma discharge catalytic purification efficiency, excellent competitiveness in the market, also make it applied widely.Through theoretical analysis and experimental research that each performance index of purifier----the dust removal efficiency, volatile organic matter degradation efficiency, ozone concentration achieve the best. The work of this paper has three main aspects:first, through the study of ion wind generation on corona discharge,electric field calculation and experiment, we design the corona plate. Through the experimental study on dust removal efficiency of corona and influence the collection efficiency research, complete the design parameters of dust removal part of the purifier. second, the use of FLOW-3D fluid dynamics software, in the air, particles and electric charges under the influence, carries on the simulation of the corona dust removal process, analysis of dust removal efficiency increases with the voltage change. Finally, for formaldehyde degradation experiment, analysis of the factors affecting the plasma discharge catalysis.The main conclusion we get:By changing the electrode structure and parameters of power supply, can improve the dust collection efficiency, reduce the production of ozone purifier, reduce the probability of spark discharge, design of bipolar plate can effectively increase the efficiency of dust removal. In the process of regulating voltage, dust removal efficiency will increase with the voltage decreased. Ion wind speed increases lead to low dust collecting efficiency. Voltage regulation can find the maximum removal efficiency.Through FLOW-3D simulation, the tracking process of dust movement, distribution and the ion wind, explained very well with voltage rise after the removal efficiency increased first and then decreased.The degradation of plasma discharge catalytic experiment confined indoors, factors affecting the degradation efficiencies were obtained mainly has the polarity of the voltage, voltage and air relative humidity. Analysis found that, the positive polarity discharge degradation efficiency is higher than that of negative corona discharge; increase the catalytic device working voltage, can further improve the efficiency of the degradation of volatile organic compounds, but the work voltage is too high will increase the probability of spark discharge; air humidity size has a certain effect on the plasma discharge catalytic process, the efficiency of air humidity is too high will inhibit catalytic degradation of organic matter.