Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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Characteristics of Unburned Material Derived from Coal-fired Power Plant Burning Low Grade Coal

저급탄 연소 석탄회의 미연물질 특성 분석

  • Park, Ho-Young (Green Energy Lab. Korea Electric Power Research Institute, KEPCO) ;
  • Kim, Young-Ju (Green Energy Lab. Korea Electric Power Research Institute, KEPCO) ;
  • Kim, Tae-Hyung (Green Energy Lab. Korea Electric Power Research Institute, KEPCO) ;
  • Baek, Se-Hyun (Green Energy Lab. Korea Electric Power Research Institute, KEPCO) ;
  • Kim, Kyung-Soo (Green Energy Lab. Korea Electric Power Research Institute, KEPCO) ;
  • Jeoung, Kwon-Dal (Combustion Technology Center, Hadong Thermal Power Division, Korea Southern Power)
  • 박호영 (한전전력연구원 그린에너지연구소) ;
  • 김영주 (한전전력연구원 그린에너지연구소) ;
  • 김태형 (한전전력연구원 그린에너지연구소) ;
  • 백세현 (한전전력연구원 그린에너지연구소) ;
  • 김경수 (한전전력연구원 그린에너지연구소) ;
  • 권달정 (남부발전 하동화력 연소기술센터)
  • Received : 2012.01.10
  • Accepted : 2012.03.15
  • Published : 2012.03.31
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Abstract

Sub-bituminous coals have been used increasingly in coal-fired power plants with a proportion of over 50% in the blend with bituminous coals. As a result, the unburned material in fly ash has increased and is causing problems in utilizing the fly ash as an additive for concrete production. In this study, analysis of fly ash obtained from a 500 MWe power plant was carried out and unburned material in the fly ash found to be soot. The coals used in the plant were analyzed with CPD model to investigate the sooting potential depending on the coal type and blending ratio.

국내 석탄화력발전소의 아역청탄과 역청탄의 혼소는 일반화되어 있으며 아역청탄의 비율이 무게 기준으로 50%가 넘는 경우도 있다. 저급탄인 아역청탄의 혼소 비율이 높아짐에 따라 연소 부산물인 비회에서 미연물질이 다량 발생하고 있으며 이는 콘크리트 혼화제로서의 비회 재활용을 가로막는 중요한 인자로 작용하고 있다. 본 연구에서는 아역청탄 혼소율이 높은 국내 500MW 표준 석탄화력발전소에서 미연물질이 포함된 비회를 입수하여 이에 대한 분석을 수행하였다. 이러한 미연물질은 석탄의 열분해 생성물인 검댕(soot)인 것으로 나타났으며 실제 석탄화력발전소에서 사용하고 있는 석탄과 혼탄의 성상 데이터와 CPD모델을 사용하여 혼탄별 검댕(soot)의 발생가능성을 분석하였다.

Keywords

References

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