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Dielectric barrier discharge reactor structural optimization

Author: WangLei
Tutor: SunBaoMin
School: North China Electric Power University (Beijing)
Course: Thermal Power Engineering
Keywords: DBD Fluid model Reactor MATLAB
CLC: X70
Type: Master's thesis
Year: 2011
Downloads: 103
Quote: 1
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Abstract


Dielectric barrier discharge reactor method is the use of dielectric barrier discharge pollutants removal core experimental apparatus . Through the dielectric barrier discharge reactor structural optimization can improve reactor pollutant removal efficiency , while reducing power consumption . Firstly, the establishment of a judge the merits of the reactor evaluation methods : the average kinetic energy of the electron and the electron density is to judge the merits of the main parameters of the reactor . Then one-dimensional flow model of the structure of the coaxial electrode reaction to simplify analysis, using MATLAB programming, by solving the fluid continuity equation and current balance equation, the field strength inside the reactor and the temporal and spatial distribution of electron density . By comparing the electric field intensity and the electron number density , it can determine the merits of the reactor . By changing the structure of the reactor by one parameter ( amplitude of the applied voltage , the power frequency , dielectric material , dielectric layer thickness , the radius of the center electrode , a discharge gap ) to study the parameters of the reactor efficiency of contaminant removal . The results showed that: the amplitude of the applied voltage , the more beneficial pollutant removal ; power frequency rate of removal is nonlinear ; larger the dielectric constant dielectric material , the effect of the removal of the more pollutants good ; dielectric layer thickness may be altered ; center electrode radius , the more beneficial removal of contaminants ; gas removal efficiency in ensuring the premise, can be appropriately increased discharge gap length. Finally simulation results were validated against experimental . In our group to build the experimental stage for removal of NO in rats. Gas flow were investigated (6.3L/min and 10.5L/min), discharge frequency (10kHz and 20kHz), the discharge gap (7.5mm and 5mm) and other parameters on NO removal rate. The experiments by the accuracy of the simulation . This research reactor for improving the removal rate of pollutants and industrial application of the reactor has a certain reference value.

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