Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Entrained-Flow Coal Water Slurry Gasification

분류층 습식 석탄가스화 기술

  • Ra, HoWon (Clean Fossil Fuel Research Center, Korea Institute of Energy Research) ;
  • Lee, SeeHoon (Clean Fossil Fuel Research Center, Korea Institute of Energy Research) ;
  • Yoon, SangJun (Clean Fossil Fuel Research Center, Korea Institute of Energy Research) ;
  • Choi, YoungChan (Clean Fossil Fuel Research Center, Korea Institute of Energy Research) ;
  • Kim, JaeHo (Clean Fossil Fuel Research Center, Korea Institute of Energy Research) ;
  • Lee, JaeGoo (Clean Fossil Fuel Research Center, Korea Institute of Energy Research)
  • 라호원 (한국에너지기술연구원 청정화석연료연구센터) ;
  • 이시훈 (한국에너지기술연구원 청정화석연료연구센터) ;
  • 윤상준 (한국에너지기술연구원 청정화석연료연구센터) ;
  • 최영찬 (한국에너지기술연구원 청정화석연료연구센터) ;
  • 김재호 (한국에너지기술연구원 청정화석연료연구센터) ;
  • 이재구 (한국에너지기술연구원 청정화석연료연구센터)
  • Received : 2009.11.13
  • Accepted : 2009.12.15
  • Published : 2010.04.30
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Abstract

Coal gasification process, which had developed originally to convert coal from hydrogen and carbon monoxide, has used and developed in many countries because of environmental advantages such as carbon dioxide storage, decrease of pollutants and so on. Generally entrained-flow gasification process using pulverized coal under $75{\mu}m$ is used in Integrated Gas Combined Cycle(IGCC) because of easy scale up and high efficiency of energy conversion. Especially entrained-flow gasifers with coal water slurry have been used in many applications due to its fully developed technologies. In this paper, several technologies for coal-water slurry gasification that involves slurry preparation, burner, gasifier, slag melting and numerical simulation for plant design and operation were investigated. Entrained-flow gasification with coal water slurry can be used for synfuel production, SNG, chemicals as well as IGCC. To develop hybrid gasification process and use different types of coal, it is necessary to develop new technologies that will increase efficiency of the process.

석탄으로부터 수소, 일산화탄소 등의 가스 연료를 생산하기 위하여 개발된 석탄 가스화 공정은 이산화탄소 저장, 환경 유해 물질 저감 등의 우수성으로 인하여 최근 세계 각국에서 앞다투어 개발에 나서고 있다. $75{\mu}m$ 이하의 미분탄을 이용하는 분류층 가스화 공정은 용량의 대형화가 쉽고, 에너지 전환 효율이 우수하여 석탄가스화복합발전(IGCC) 등에 널리 이용되고 있다. 특히 석탄슬러리를 원료로 사용하는 습식 분류층 가스화 공정은 기술적으로 성숙되어 가장 많이 보급되고 있다. 본 논문에서는 습식 분류층 가스화 공정을 이루는 석탄전처리, 버너, 가스화기, 슬래그용융, 가스화 운전 특성과 설계 및 해석을 위한 수치모사 등의 요소기술 개발 현황을 고찰하였다. 습식 석탄가스화는 IGCC 플랜트에서 뿐만 아니라 합성석유, SNG, 화학원료 제조용으로 활용될 수 있으며 융합 공정, 연료 다변화 등에 대응하기 위하여 요소기술별 추가적인 기술개발이 이루어져야 할 것으로 판단된다.

Keywords

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