Investigation On Degradation Of Particulate Matter (PM) By Array Dielectric Barrier Discharge

Atmospheric pressure dielectric barrier discharge(DBD)has a number of important industrial application,such as ozone production,plasma display,surface modification and so on.With the development of transport and industry,ambient air particulates increase with pollutant emission.there have a bad impact on life quality.Thus,the technique of DBD has attracted increasing attention on air purification in recent years.Atmospheric pressure DBD have many advantages such as discharge stability,larger discharge area,no electrodes pollution.Its reactors have a simple structure.Low plasma produced by DBD can quickly react with particulate matter(PM).Therefore,technique of DBD has commercial value and great potential in degradation of PM in the future.In this paper,All of designed plasma reactors are on the base of DBD electric characteristic.There have been studied the effects of Arrayed DBD reactor on PM in air.The main work and conclusion is organized as follows:(1)The environment pollution situation is discussed;the normal method of PM reduction is also presented.Finally,the mechanism of PM removal is given with the action of DBD.(2)In order to compute capacitance of arrayed DBD reactor,capacitance formula is deduced.Thus,gas capacitance and dielectric capacitance by themselves are calculated in detail.They provide circuit model with the input parameters.Experimental system is built.Based on this system,discharge phenomenon of designed DBD is given at different voltage and frequency.Of course,voltage,current and lissajous oscillogram are analyzed.(3)Based on PSIM software,circuit model is built out.The Q-V graphics agree qualitatively with the measured values in the different applied frequency.These results also verify the correctness of circuit model.(4)Fans and plexiglass air cleaning devices are chosen in the system designing.In this chapter,A series experiment have been conducted to remove smoke by the designed Arrayed DBD reactor.The chapter explores the impact of the voltage,frequency and output power on PM2.5 and PM10 degradation.Experiments show that degradation rate of PM2.5 and PM10 increases with discharge voltages.Results also indicate that PM2.5 and PM10 are degraded fastest when the power frequency is 10 kHz.Finally,output power is also important to PM2.5 and PM10 reduction.