Study On Characteristics And Application On Degradation Of PM2.5 Of An Array Dielectric Barrier Discharge Device

With the development of industry in recent years, emissions of factory increases in air, which causes concentration of PM2.5 increase in air, causes decline of air quality and has a huge impact on life of human. Researches on degradation of PM2.5 in air is also in full swing. Studying on degradation of PM2.5 in air shows that Dielectric Barrier Discharge(DBD) have unique advantages on it. large area low temperature plasma can be produced in atmospheric air by Dielectric Barrier Discharge. Also, the discharge can produce lots of active ions, electrons, free radicals, which needs lower power than other kinds of plasma generating equipments. DBD makes less electromagnetic radiation and pollution to environment than other kinds of plasma generating equipments. So DBD has huge potential and value on air clean.In this paper, work of large area low temperature produced and studied in laboratory is done with a new DBD device. It involves the studying on physical principal of producing low temperature plasma, compute of relevant parameters, experimental exploration of discharge, simulation of circuit and experiment of PM2.5 degradation. The main work is as follows:1. A new kind of array DBD device is developed, which is different from other kinds of DBD devices, and principals of producing low temperature plasma is explained in detailed;2. Large area low temperature plasma is produced by device in atmospheric air. Relationship between amplitude, starting voltage of current pulses and discharge conditions such as amplitude and frequency of voltage waveform is studied. Also, relevant parameters such as equivalent dielectric capacitor, equivalent gas capacitor, power at different amplitude of voltage and frequency are studied.3. Simulated mode is build by SIMULINK unit in MATLAB platform combining with principles of DBD. Results of calculation of Lissajous figure and waveforms of voltage and current are correspond with experiments when relevant parameters is substituted in mode. It is shown that the mode is consistent with discharge in experiments and parameters calculated are correct.4. The PM2.5 degradation experiments are done with discharge, which proves that DBD is useful to PM2.5 degradation in air. Exploration of effect on rate of PM2.5 degradation with different electrical parameters is held, which shows that amplitude of voltage waveform, frequency of discharge have obvious effect on rate of PM2.5 degradation.