Estimation of Washing Duration of Desulfurized Absorber in a Heavy Oil Power Plant

중유화력발전소 탈황 흡수탑 세정시기예측

  • Published : 2016.03.30

Abstract

In desulfurization facilities of oil-fired power plant, gypsum scale is attached in the absorber inner surface as the operating time increases. For this reason, the maximum possible load of the power generation is set down, resulting in further generation stop. Cleaning of absorber for scale removal can be determined at the time of setting down of the maximum possible load. In this study, 6 weeks before the maximum possible load of the power generation was down set, at the same time and desulfurization facilities outlet $SO_2$ concentration value was more than 130ppm, absorber differential pressure exceeded $380mmH_2O$, it was confirmed to be the time that has elapsed 44 weeks after the previous absorber cleaning. Cleaning time of the absorber was predicted to be a time which has elapsed 50 weeks from the previous cleaning time.

중유를 연소하는 D 발전소 탈황설비는 운전시간의 경과에 따라 흡수탑 내부에 석고 스케일이 부착되어 발전가능 최대출력의 하향조정이 발생되고 나아가 발전정지를 초래한다. 스케일 제거를 위한 탈황설비 세정은 발전가능 최대출력의 하향조정이 발생하는 시점으로 결정할 수 있다. 본 연구에서는 탈황설비의 운전 자료를 분석하여 발전가능 최대출력의 하향조정이 발생되기 6주전은 탈황설비 출구 $SO_2$ 농도값이 130ppm을 초과하고 동시에 흡수탑 차압은 $380mmH_2O$을 초과하며, 직전 흡수탑 세정 이후 44주가 경과된 시점이 됨을 확인하였다. 최종적으로 흡수탑의 세정시기는 직전 세정시점으로부터 50주가 경과된 시점임을 예측하였다.

Keywords

References

  1. Korea Power Learning Institute, 2014, Practice of Desulfurization Facilities, Cheongoh Print, Chungcheongnam-do, pp. 46-48.
  2. Daewoo Corporation, 2000, Operation and Maintenance Guidance for Flue Gas Desulfurization Plant for Ulsan Thermal Power Plant Units 4 through 6, Volume 1, Daewoo Corporation, Seoul, pp. 3-23.
  3. Daewoo Corporation, 2000, Data Book for Flue Gas Desulfurization Plant for Ulsan Thermal Power Plant Units 4 through 6, Daewoo Corporation, Seoul, pp. 10-13.
  4. Korea Electric Power Research Institute, 2005, How to install the Absorber Slurry Injection Pump, Korea Electric Power Research Institute, Daejeon Metropolitan City pp. 8-9.