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

  • 제38권10호
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  • Pages.807-815
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  • 2014
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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고로 내 미분탄 연소조건에서 탄종에 따른 입자온도와 CO/CO2 배출 특성에 관한 연구

Experimental Study on Particle Temperature and CO/CO2 Emission Characteristics of Pulverized Coal Combustion Condition According to Coal Types in Blast Furnace

  • 조영재 (부산대학교 기계공학부) ;
  • 김진호 (부산대학교 기계공학부) ;
  • 김량균 (부산대학교 기계공학부) ;
  • 김규보 (부산대학교 화력발전에너지분석기술센터) ;
  • 전충환 (부산대학교 기계공학부)
  • 투고 : 2014.02.26
  • 심사 : 2014.06.30
  • 발행 : 2014.10.01
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초록

본 연구는 최근 대형고로에 도입된 PCI 시스템에서 석탄의 탄종에 따른 연소 특성을 파악하기 위해, 고로내 석탄의 연소환경을 잘 모사할 수 있는 층류반응기(LFR)을 이용하여 화염형상을 분석하고, 체류시간별 입자의 온도와 배기가스인 CO와 $CO_2$를 측정하였다. 화염형상의 가시적인 분석뿐만 아니라, 입자온도와 배기가스의 배출특성을 근거로 하여 휘발분 연소와 촤 연소 구간을 구분하였다. 특히 CO는 고로내 발생하는 산화철의 환원반응에 영향을 주는 인자로써, 본 연구에서는 탄종별 CO의 배출시점과 특성에 대한 분석이 이루어졌다. 휘발분 함량이 많은 탄종의 연소 초기 입자온도는 높게 측정되었지만, 휘발분 연소구간이 길어지면서 이후에 연속적으로 시작되는 촤 연소가 지연되었다. 촤 연소구간에서는 연료비가 높을수록 CO발생량이 상대적으로 많고, 적정온도가 유지되었다.

This study was performed using a laminar flow reactor that could replicate the combustion environment of pulverized coal in a blast furnace. Since a pulverized coal injection system was developed for iron making, the combustion characteristics of pulverized coal have been important in the iron and steel industry. The flame structure, particle temperature, and exhaust gas were investigated for different types of coal. The results of this study demonstrated that the combustion characteristics of coal are influenced by several properties of individual coals. In particular, the CO emission and volatile matter content of individual coals were found to have a strong influence on their combustion characteristics. Thus, this study found the properties of the coals to be significant and focused on the particle temperature and CO and $CO_2$ emissions.

키워드

참고문헌

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피인용 문헌

  1. Effect of coal blending ratio on CO2 coke gasification vol.34, pp.11, 2017, https://doi.org/10.1007/s11814-017-0196-9