Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Desulfurization Characteristics of Domestic Limestones through Simultaneous Calcination and Desulfurization Reaction

국내 석회석들의 소성 탈황 동시반응 특성

  • Shin, Ji Hoon (Department of Resources and Energy Engineering, Chonbuk National University) ;
  • Kim, Yea Ra (Department of Resources and Energy Engineering, Chonbuk National University) ;
  • Kook, Jin Woo (Department of Resources and Energy Engineering, Chonbuk National University) ;
  • Kwak, In Seop (Department of Resources and Energy Engineering, Chonbuk National University) ;
  • Park, Kyoung-Il (Green Energy Laboratory, Korea Electric Power Corporation (KEPCO) Research Institute) ;
  • Lee, Jong-Min (Green Energy Laboratory, Korea Electric Power Corporation (KEPCO) Research Institute) ;
  • Lee, See Hoon (Department of Resources and Energy Engineering, Chonbuk National University)
  • 신지훈 (전북대학교 자원에너지공학과) ;
  • 김예라 (전북대학교 자원에너지공학과) ;
  • 국진우 (전북대학교 자원에너지공학과) ;
  • 곽인섭 (전북대학교 자원에너지공학과) ;
  • 박경일 (전력연구원 그린에너지연구소) ;
  • 이종민 (전력연구원 그린에너지연구소) ;
  • 이시훈 (전북대학교 자원에너지공학과)
  • Received : 2015.06.23
  • Accepted : 2015.07.17
  • Published : 2015.10.10
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Abstract

In order to analyze and compare the desulfurization characteristics of five different kinds of domestic limestons, a thermogravimetric analyzer (TGA) was used in this study. Calcium carbonate contents of the domestic limestone varied from 91 to 96 wt%. Experimental temperature and sulfur dioxide concentration of $850^{\circ}C$ and 2,750 ppm, respectively were selected to simulate commercial operation conditions. In this study, the calcination and desulfurization reaction of limestones were simultaneously occurred and investigated to simulate in-situ desulfurization reaction in commercial circulating fluidized bed combustors. In addition, desulfurization reactivities of limes having the average particle sizes of 37.5, 90.5, 159, 356 and $750{\mu}m$ were investigated. Desulfurization reactivities via simultaneous calcination and desulfurization reactions were 5-20% lower than those of using general desulfurization reactions.

순환유동층 보일러에서 보일러 내의 탈황을 위해 사용되는 국내 석회석 5종의 탈황반응성을 비교 및 분석하기 위해서 TGA (Thermogravimetric analyzer)를 이용하여 실험하였다. 실험에 사용한 석회석 시료들의 $CaCO_3$ 함량은 91-96 wt%이었으며 실험 조건은 상용 순환유동층 보일러의 운전 조건과 유사한 $850^{\circ}C$의 온도와 2,750 ppm의 $SO_2$로 하였다. 실제 순환유동층 반응기 내에서 진행되는 보일러 내의 탈황을 모사하기 위하여 탈황제인 석회석의 소성과 탈황 반응을 순차적으로 진행하는 일반적인 탈황 반응과 달리 소성과 탈황 반응을 동시에 진행하였다. 또한 37.5, 90.5, 159, 356, $750{\mu}m$의 평균 입도를 가지도록 석회석을 분류하여 석회석의 입도에 따른 탈황 반응성의 변화를 고찰하였다. 석회석의 소성 탈황 동시 반응에서 측정된 탈황 결과는 기존의 석회석 탈황 결과보다 5-20% 정도 낮아 석회석의 로내 탈황에 더 많은 석회석이 필요함을 보여주었다.

Keywords

References

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