Characteristics of an electrostatic precipitator for submicron particles using non-metallic electrodes and collection plates

Filtration of Submicron Aerosol Particles Using a Carbon Fiber Ionizer-assisted Electret Filter

“…However, the ozone concentration downstream of the electret filter was reduced to as low a value as the background concentration (< 0.8 ppb) for all face velocities of 0.5 to 2.0 m/s, since the ozone generated at the tip of the ionizer was diluted with ambient air having an ozone concentration below 0.8 ppb. Our results are in good agreement with the previous results (Han et al, 2008;Park et al, 2009;Kim et al, 2010;Park et al, 2010;Park et al, 2011).…”

“…They showed that a carbon fiber ionizer installed in front of an electret cabin air filter increased the PM 2.5 reduction by 20-21%. Kim et al (2010) developed a novel Electrostatic Precipitator (ESP) that uses an anticorrosive carbon brush ionizer as a precharger, and plastic collection plates. Their experimental results showed that high collection efficiency and a low pressure drop in the ESP can be obtained by generating a large quantity of unipolar ions and producing negligible concentrations of ozone.…”

Integration of a nonmetallic electrostatic precipitator and a wet scrubber for improved removal of particles and corrosive gas cleaning in semiconductor manufacturing industries

“…The voltage applied to the collection plates and the air velocity were maintained at 12 kVand 1 m/sec, respectively. Increasing the specific corona power applied to the charger from 4 Â 10 À5 to 5 Â 10 À3 W/m 3 /hr resulted in an increase in collection efficiency for the submicron particles from 70% to 95% because of the increased charging rates of the particles, which were caused by an increase in both the number of negative ions in the charger and the electrical field strength (Han et al, 2010;Kim et al, 2010b). Increasing the length of the channels did not significantly change the collection efficiency of particles in the ESP for a given specific corona power applied to the charger.…”

“…(a) Nonmetallic ESP and (b) wet scrubber with packing balls. geometry of the ESP was the same as the geometry of the one developed in our previous study (Kim et al, 2010b (Allan et al, 2011). At the center of the 16 channels, nonmetallic carbon brush chargers composed of a bundle of approximately 300 carbon fibers with a diameter on the order of a few micrometers were inserted.…”

“…In this study, the ground plates for particle charging were made of CFRPs, which are a blend of carbon fibers and thermosetting resins known to be nonmetallic conductive hybrid composite materials (Allan et al, 2011). The particle collection stage for this study comprised collection plates made by anticorrosive polyvinyl chloride (PVC) sheets containing metallic films as inserts, developed by us (Kim et al, 2010b).…”