Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effect of Operating Pressure on the Heat Transfer and Particle Flow Characteristics in the Syngas Quench System of an IGCC Process

IGCC 합성가스 급속 냉각시스템의 운전 압력에 따른 열유동 및 입자 거동 특성 연구

  • Park, Sangbin (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Yang, Joohyang (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Oh, Junho (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Ye, In-Soo (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Ryu, Changkook (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Park, Sung Ku (Coal Conversion System Development Team, Corporate R&D Institute, Doosan Heavy Industries & Construction)
  • 박상빈 (성균관대학교 기계공학부) ;
  • 양주향 (성균관대학교 기계공학부) ;
  • 오준호 (성균관대학교 기계공학부) ;
  • 예인수 (성균관대학교 기계공학부) ;
  • 류창국 (성균관대학교 기계공학부) ;
  • 박성구 (두산중공업 석탄 전환 시스템 개발팀)
  • Received : 2013.12.02
  • Accepted : 2014.02.28
  • Published : 2014.02.28
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Abstract

In a coal gasifier for IGCC, hot syngas leaving the gasifier at about 1550oC is rapidly quenched by cold syngas recycled from the gas cleaning process. This study investigated the flow and heat transfer characteristics in the gas quench system of a commercial IGCC process plant under different operating pressures. As the operating pressure increased from 30 bar to 50 bar, the reduced gas velocity shortened the hot syngas core. The hot fly slag particles were retained within the core more effectively, and the heat transfer became more intensive around the hot gas core under higher pressures. Despite the high particle concentrations, the wall erosion by particle impaction was estimated not significant. However, large particles became more stagnant in the transfer duct due to the reduced gas velocity and drag force under higher pressures.

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References

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