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석탄회의 용융특성을 고려한 신개념 슬래깅 지수 평가

Advanced slagging propensity of coal and its assessment with the conventional indices

  • 투고 : 2012.09.20
  • 심사 : 2012.10.22
  • 발행 : 2012.12.31

초록

국내 500MW 석탄화력발전소에서 사용중인 역청탄 (앵글로탄)과 아역청탄 (타니토탄)을 입수하여 석탄회의 기본적인 연료 및 연소특성을 살펴보았다. 또한, 열기계분석기를 이용하여 석탄 회에 대한 고온 용융특성을 평가하고 최근 새롭게 제시된 BHEL 슬래깅 지수를 구하였다. 아역청탄인 타니토탄 회는 $1,200{\sim}1,250^{\circ}C$에서 대부분의 용융이 발생하고 있으나 역청탄인 앵글로탄 회는 상대적으로 높은 온도인 $1,550^{\circ}C$ 부근에서 급격한 용융이 발생하였다. 석탄 회의 용융특성과 석탄중의 회 함량을 고려한 BHEL 지수는 두 탄종 모두 슬래깅성이 높은 것으로 나타났다. 반면, 기존의 슬래깅 지수들은 서로 다른 슬래깅성을 보여주었다.

The fuel characteristics and combustion behaviors of bituminous (Anglo) and sub-bituminous (Tanito) coals used in 500MW coal fired power plant have been investigated. With ashes of those coals, the ash fusibility is characterized with thermo mechanical analyzer, and the advanced ash slagging propensity, BHEL index, has been obtained. The melting-down of tanito coal ash happened in the temperature range of 1,200 to $1,250^{\circ}C$, and for anglo coal ash it occurred near $1,550^{\circ}C$. BHEL indices for two coals gives the high slagging propensity, and these are compared with the existing traditional indices which give different tendencies.

키워드

참고문헌

  1. 한국전력공사, "연소관리실무", 1998, 67-70.
  2. Couch, G., Understanding slagging and fouling in Pf co mbustion, IEA coal research, London, UK,1994, IEAC R/72.
  3. Scott, DH., Ash behaviour during combustion and gasification, IEA coal research, London, UK,1994, CCC/24
  4. Gibb, W.H., The UK collaborative research programme on slagging pulverized coal-fired boilers: summary of findings in: L. Baxter, R. DeSollar (Eds.), Applications of advanced technology to ash-related problems in boiler. Proceedings of the engineering foundation conference. Waterville Valley, New Hampshire., July, 16-21, 1995, 41-65.
  5. Barroso, J., Ballester, J., Pina, A., Study of coal ash depo sition in an entrained flow reactor: Asse3ssment of tradi tional and alternative slagging indices, Fuel processing technology, 2007, 88, 865-876. https://doi.org/10.1016/j.fuproc.2007.04.008
  6. Lawrence, A., Kumar, R., Nandakumar, K., Narayanan, K., A novel tool for assessing slagging propensity of coals in PF boilers, Fuel, 2008, 87, 946-950. https://doi.org/10.1016/j.fuel.2007.07.028
  7. Tortosa Masia, A.A., Buhre, B.J.P., Gupta, R.P., Wall, T.F., Use of TMA to predict deposition behaviour of biomass fuels, Fuel, 2007, 86, 2446-2456. https://doi.org/10.1016/j.fuel.2007.01.024
  8. Rushdi, A., Sharma, A., Gupta, R., An experimental stud y of the effect of coal blending on ash deposition, Fuel, 2004, 83, 495-506. https://doi.org/10.1016/j.fuel.2003.08.013
  9. Rushdi, A., Gupta, R., Investigation of coals and blends deposit structure: measuring the deposit bulk porosity using thermomechanical analysis technique, Fuel, 2005, 595-610.
  10. Smoot, L.D. Fundamentals of coal combustion for clean and efficient use, Elsevier Science, 1993. 10-15.
  11. Benson, S.A.; Steadman, E.N.; Zygaricke, C.J.; Erickson, T.A. Ash formation, deposition, corrosion and erosion in conventional boilers, Plenum Press, New York, 1996.

피인용 문헌

  1. A Study on Ash Fusibility Temperature of Domestic Thermal Coal Implementing Thermo-Mechanical Analysis vol.52, pp.2, 2014, https://doi.org/10.9713/kcer.2014.52.2.233