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Combustion Characteristics of Imported Bituminous & Subbituminous Coal in a Pilot Scale Test Facility

발전용 역청탄 및 아역청탄의 파일롯 연소특성 평가

  • Kim, Hyunhee (Fuel & Combustion Group, Korea Electric Power Research Institute, KEPCO) ;
  • Park, Hoyoung (Fuel & Combustion Group, Korea Electric Power Research Institute, KEPCO) ;
  • Lim, Hyunsoo (Fuel & Combustion Group, Korea Electric Power Research Institute, KEPCO) ;
  • Baek, Sehyun (Fuel & Combustion Group, Korea Electric Power Research Institute, KEPCO) ;
  • Kim, Taehyung (Fuel & Combustion Group, Korea Electric Power Research Institute, KEPCO) ;
  • Kim, Youngju (Fuel & Combustion Group, Korea Electric Power Research Institute, KEPCO) ;
  • Gong, Jiseon (Fuel & Combustion Group, Korea Electric Power Research Institute, KEPCO) ;
  • Lee, Jeongeun (Fuel & Combustion Group, Korea Electric Power Research Institute, KEPCO)
  • 김현희 (한전 전력연구원 연료연소그룹) ;
  • 박호영 (한전 전력연구원 연료연소그룹) ;
  • 임현수 (한전 전력연구원 연료연소그룹) ;
  • 백세현 (한전 전력연구원 연료연소그룹) ;
  • 김태형 (한전 전력연구원 연료연소그룹) ;
  • 김영주 (한전 전력연구원 연료연소그룹) ;
  • 공지선 (한전 전력연구원 연료연소그룹) ;
  • 이정은 (한전 전력연구원 연료연소그룹)
  • Received : 2014.07.15
  • Accepted : 2014.12.12
  • Published : 2014.12.31

Abstract

With the depletion of high grade coal, it is indispensable to be used co-combustion of low rank coal with bituminous coal in pulverized coal-fired power plants. This study describes the detailed measurements of combustion characteristics of bituminous and subbituminous coal in a 0.7MWth pilot-scale test facility. This experimental works include the measurement of gas temperature, gas concentrations along with the reactor axial and radial distance at the condition of excess air ratio of 1.2. The solid sampling was carried out and analyzed with the combustion of bituminous coal. The main reaction zone of coal flame in a reactor was formed about 1 m from the swirl burner, and at downstream, the fully developed temperature and species distribution was observed. The sampled particles of bituminous coal in a reactor revealed the complete carbon burn-out was achieved just after an main combustion zone.

고급탄의 고갈에 따라 석탄화력발전소에서의 저급탄 혼소가 필수불가결하게 되었다. 본 연구에서는 국내에서 수입되는 석탄 중에서 대표적으로 사용되는 역청탄과 아역청탄에 대한 연소특성을 0.7MWth 파일롯 연소실험장치를 사용하여 측정, 분석하였다. 과잉공기비가 1.2인 상태에서 축방향 및 반경방향의 노내 가스온도 및 주요 가스농도를 측정하였으며, 역청탄 연소시 반응로 내의 입자 샘플링을 수행하였다. 두 탄종의 주반응영역은 노 상부의 스월버너로부터 약 1m 근방에서 형성되었으며, 노 하류에서는 완전 확립된 온도와 농도분포를 나타내었다. 포집된 역청탄의 고체입자 분석으로부터 주반응영역 이후에 완전한 탄소전환이 이루어진 것을 확인하였다.

Keywords

References

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