오일 미스트 포집을 위한 저전력 소비형 2단 전기집진기의 집진효율에 대한 연구
A study on particle collection efficiency of a low power consumption two-stage electrostatic precipitator for oil mists collection
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참고문헌
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초록
본 연구에서는 마이크로 탄소 브러쉬 하전부와 평판형 금속 집진부로 구성된 저전력 소비형 2단형 전기집진기를 개발하였고, 특히 인체 위해성이 높은 0.3㎛급의 미세한 오일 미스트에 대한 인가전압및 소비전력별 집진효율 특성을 실험연구를 통해 고찰하였다. 하전부의 인가전압에 따른 단위 입자당하전율과 입경별 집진효율을 측정함과 동시에 이론에 근거한 계산값과 비교해 보았으며, 9 주 동안의 장시간 운전을 통해 지속적으로 포집된 오일 미스트에 의한 전기집진기의 성능을 열유체역학적인 관점에서 변화를 조사하였다.
Abstract
A two-stage electrostatic precipitator (ESP) using a carbon brush charger and a plate-plate parallelaluminum collector was developed and its application for removal of oil mist aerosols was investigated. Charge number per particle and particle collection efficiency at different applied voltage to the carbon brushcharger were measured and compared to those obtained by theoretical calculations. A long-term operation ofthe ESP during 9 weeks was also performed to evaluate its performance durability for oil mists. Averagecharge number per mist particle increased with the applied voltage to the charger, and thus the collection efficiencyof the mist particles also increased overall at the particle size range of 0.26 - 3 mm. The tendencies ofthe average charge number per particle and particle collection efficiency obtained from theoretical calculationswere considerably consistent with those of the experimental results. Particle collection efficiency of ~99 % at0.3 mm could be achieved by power consumption of only 0.0033 W/(m3/h) at the face velocity of 1 m/s andits collection performance maintained stably during every 8 hr operation per day for 9 weeks with little increaseof pressure drop.
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