도시철도 터널 미세먼지 제거용 하이브리드형 집진장치의 성능평가

초록

Urban railway tunnels are polluted by resuspension of deposited bottom dust or newly generated wear dust.A hybrid type dust collector consisting of a baffle and an electrostatic precipitator was developed to remove these typesof airborne dust when trains are running in the tunnel. Since dust collection efficiency of the hybrid dust collector isinversely proportional to the airflow rate, the relationship between airflow rate and dust collection efficiency was exper-imentally investigated for two baffle models. Collection efficiencies for dust larger than 0.5 µm for the hybrid dust col-lector model A1, operated at 3.4 m/s, were greater than 30%; those for the hybrid dust collector model A2, operated at4.7 m/s, were higher than 20%. When the applied voltage was 13 kV, the amounts of PM10 collected with model A1 andmodel A2 dust collectors were estimated at 253 µg and 242 µg per hour, respectively.

키워드