Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Numerical Study of Distribution Characteristics of Pulverized Coal According to Operation Condition in PM Burners

저공해 버너에서의 운전조건에 따른 미분탄 분배특성에 관한 수치 해석 연구

  • Yoon, Sung-Hwan (Dept. of Energy System Engineering, Pukyong Nat'l Univ.) ;
  • Park, Jeong (Dept. of Mechanical Engineering, Pukyong Nat'l Univ.) ;
  • Kwon, Oh-Boong (Dept. of Mechanical Engineering, Pukyong Nat'l Univ.) ;
  • Park, Ho-Young (Power Generation Laboratory, Korea Electric 'Power' Research Institute) ;
  • Seo, Sang-Il (Power Generation Laboratory, Korea Electric 'Power' Research Institute)
  • 윤성환 (부경대학교 에너지시스템공학과) ;
  • 박정 (부경대학교 기계공학과) ;
  • 권오붕 (부경대학교 기계공학과) ;
  • 박호영 (한전 전력연구원 수화력발전그룹) ;
  • 서상일 (한전 전력연구원 수화력발전그룹)
  • Received : 2011.01.04
  • Accepted : 2011.02.11
  • Published : 2011.05.01
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Abstract

We performed numerical simulation using a DPM (discrete phase model) to identify the optimal operation ranges in two representative PM burners widely used in domestic 500-MW pulverized coal-fired power plants. Recently there has been an increased utilization of low-cost coals such as sub-bituminous coal. We investigate the effects of coal blends on the distribution ratio of coal to air by varying the mass flow rates of pulverized coal and primary air and the particle size. We present and discuss optimal conditions for the distribution ratio of coal to air in PM burners.

국내에서 널리 사용되는 500 MW급 미분탄 화력발전에서 2개의 PM (pollution minimum) 버너의 최적 운전 범위를 확인하기 위하여 DPM (discrete phase model)을 활용하여 수치계산을 수행하였다. 본 연구는 저가의 아역청탄의 활용 증진을 위하여 다양한 조건에서 탄 종별로 연구를 수행하는데 그 목적이 있다. 탄 종별로 미분탄의 질량 유량, 1차 공기의 질량 유량, 그리고 미분탄의 입자 크기 분포를 달리하여 공기/석탄의 분배비의 영향을 조사하였다. 이러한 매개변수에 관하여 PM 버너에서의 공기/석탄의 분배비의 최적운전조건을 도출하고 이에 대해 논의하고자 한다.

Keywords

References

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