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Simultaneous removal of aerosol particles, NOx and SO2, from incense smokes by a DC electrostatic precipitator with dielectric barrier discharge prechargers

In this paper, electrostatic precipitators (ESPs) under positive corona discharge operation with and without wire-rod and wire-quadrupole type barrier discharge prechargers were tested for simultaneous removal of submicron particles, NOx and SO2. High dielectric constant ferro-electric materials and hard glass were used as the barrier for barrier discharge type precharger. The results show that aerosol particles, NOx and SO2, were simultaneously removed by DC positively biased wire-plate ESPs, and that the particle collection efficiency was improved by an addition of wire-quadrupole type barrier discharge precharger in front of the wire-plate ESP. The addition of the prechargers, however, had little effect on the overall removal efficiencies of NOx and SO2.