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

The Korean Society of Mechanical Engineers (대한기계학회)
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A Numerical Study on the Effects of SOFA on NOx Emission Reduction in 500MW Class Sub-bituminous Coal-Fired Boiler

500MW급 아역청탄 전소 보일러의 NOx 배출저감에 미치는 SOFA 영향에 관한 연구

  • 강기태 (부산대학교 기계공학부 대학원) ;
  • 송주헌 (부산대학교 기계공학부) ;
  • 윤민지 (부산대학교 기계공학부 대학원) ;
  • 이병화 (부산대학교 기계공학부 대학원) ;
  • 김승모 (부산대학교 기계공학부) ;
  • 장영준 (부산대학교 기계공학부) ;
  • 전충환 (부산대학교 기계공학부)
  • Published : 2009.11.01
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Abstract

A numerical investigation has been carried out about the performance of a 500MW class tangentially coal-fired boiler, focusing on the optimization of separated overfire air (SOFA) position to reduce NOx emission. For this purpose, a comprehensive combination of NOx chemistry models has been employed in the numerical simulation of a particle-laden flow along with solid fuel combustion and heat and mass transfer. A reasonable agreement has been shown in baseline cases for predicted operational parameters compared with experimental data measured in the boiler. A further SOFA calculation has been made to obtain optimum elevation and position of SOFA port. Additionally, clarifying on the effect of SOFA on NOx emission has been carried out in the coal-fired boiler. As a result, this paper is valuable to provide an information about the optimum position of SOFA and the mechanism by which the SOFA would affect NOx emission.

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References

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