Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Prediction of Pressure Drop Using the Internal Flow Simulation of Pulse Air Jet Bag Filters

충격기류식 여과집진기의 내부 유동 시뮬레이션 해석을 통한 압력손실 예측

  • Jang, Kyeong-Min (Department of Bio Environmental Energy, Pusan National University) ;
  • Jung, Eun-Sang (Department of Bio Environmental Energy, Pusan National University) ;
  • Suh, Jeong-Min (Department of Bio Environmental Energy, Pusan National University)
  • 장경민 (부산대학교 바이오환경에너지학과) ;
  • 정은상 (부산대학교 바이오환경에너지학과) ;
  • 서정민 (부산대학교 바이오환경에너지학과)
  • Received : 2020.02.20
  • Accepted : 2020.04.16
  • Published : 2020.05.31
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Abstract

With continuous industrial development, the types, and amount of particulate matter (PM) have been increasing. Since 2018, environmental standards regarding PM have become more stringent. Pulse air jet bag filters are suitable for PM under the 20 ㎛ and, can function regardless of size, concentration and type. Filtration velocity and shape are important factors in the operation and design of the pulse air jet bag filters however, few established studies support this theory. In this research, numerical simulations were conducted based on experimental values and, several methods were employed for minimizing the pressure drop. In the pilot system, as the inlet duct velocity was faster than 19 m/sec, flow was not distributed equally and, re-entrainment occurred due to the hopper directional vortex. The multi-inlet system decelerated the hopper directional vortex by 25 ~ 30%, thereby decreasing total pressure drop by 6.6 ~ 14.7%. The guide vane system blocked the hopper directional vortex, which resulted optimal vane angle of 53°. The total pressure of the guide vane system increased by 0.5 ~ 3% at 1.5 m/min conditions. However, the filtration pressure drop decreased by 4.8 ~ 12.3% in all conditions, thereby reducing the operating cost of filter bags.

Keywords

References

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