2단 정전식 세정집진기의 집진 및 가스제거 특성 = An Experiment on Particle Collection and Gas Removal in a 2-Stage Electrostatic Wet Scrubber

다국어 초록 (Multilingual Abstract)

DOS and NaCl aerosol particles were used to determine collection efficienciesof a 2-stage electrostatic wet scrubber with respect to particle size. The DOS and NaCl aero-sols have geometric mean diameters of 0.1∼3.0m, geometric standard deviations of 1.1∼1.8 and total number concentrations of 450∼2,400 particles/cm3. The tested operating variables for the electrostatic wet scrubber included air velocity and water injection rate. It was shown from the experimental results that particle collection efficiencies increased in the submicron particle size range when different polarities were applied on the water nozzle and corona wire, respectively. This increase in the collection efficiency is attributed to strong electrostatic attraction between the negative water droplets and positive submicron particles. The collection efficiencies also increased when water injection rate was increased or air velocity was decreased. Meanwhile, the pressure drop across the wet scrubber decreased by 90% compared with the existing mechanical wet scrubber. Finally, ammonia gas was used to determine gas removal efficiencies. It was observed that the gas removal efficiencies increased when the air velocity was decreased or the water injection rate was increased.

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