The Optimization Design For The Structure Of Dielectric Barrier Discharge Reactor

Dielectric barrier discharge (DBD)reactor is the main equipment for pollutants removal by using dielectric barrier discharge method.The efficiency of pollutants removal will be improved by use of optimizing the structure of DBD reactor,simultaneously,the loss of power will be decreased.A evaluation method is established to estimate the performance of the reactor at the beginning of this paper:the mean electron energy and electron density are the main parameters to judge the performance of reactor.Then a simplified analysis for the structure of the axially symmetrical reactor is made to use the one-dimensional fluid model.compile program by means of MATLAB.it is easy to obtain the temporal and spatial distribution by solving the fluid continuity equation and the current conservation equation.So we can estimate the performance of reactor.Making a research on the impact of the reactor structure to pollutants removal by changing the value of structure parameter(applied voltage amplitude, power frequency, dielectirc material, the thickness of dielectric,inner electrode radius and discharge gap) one by one.The simulation results show that:the removal rate of pollutants increased with the increase of applied Voltage amplitude;the impact of power frequency to removal rate of pollutants is nonlinear;if the dielectric constant of the dielectric material is big,it is helpful to pollutants removal;the thickness of dielectric material should be keep constant;the length of the discharge gap should be increased on the premise of high removal rate of pollutants.At last,three verification experiments are conducted.These experiments about NO removal are finished on the lab table builded by our studying team.The three parameters are gas flow(6.3L/min and 10.5L/min),power frequency(10kHz and 20kHz),discharge gap(7.5mm and 5mm)respectively.The accuracy of the simulation is verified by the experiments.The research results in this paper are reference for reactor to improve the pollutants removal rate and industrial application.