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Performance Evaluation of a Hybrid Dust Collector for Removal of Airborne Dust in Urban Railway Tunnels

도시철도 터널 미세먼지 제거용 하이브리드형 집진장치의 성능평가

  • Received : 2017.02.14
  • Accepted : 2017.07.05
  • Published : 2017.08.31

Abstract

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 types of airborne dust when trains are running in the tunnel. Since dust collection efficiency of the hybrid dust collector is inversely proportional to the airflow rate, the relationship between airflow rate and dust collection efficiency was experimentally investigated for two baffle models. Collection efficiencies for dust larger than $0.5{\mu}m$ for the hybrid dust collector model A1, operated at 3.4 m/s, were greater than 30%; those for the hybrid dust collector model A2, operated at 4.7 m/s, were higher than 20%. When the applied voltage was 13 kV, the amounts of $PM_{10}$ collected with model A1 and model A2 dust collectors were estimated at $253{\mu}g$ and $242{\mu}g$ per hour, respectively.

Acknowledgement

Supported by : 국토교통부

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