KEPCO Journal on Electric Power and Energy

  • 제5권2호
  • /
  • Pages.83-92
  • /
  • 2019
  • /
  • 2465-8111(pISSN)
  • /
  • 2466-0124(eISSN)
한국전력공사 (Korea Electric Power Corporation)
권호 표지
DOI QR코드

DOI QR Code

Characteristics of Spontaneous Combustion of Various Fuels for Coal-Fired Power Plant by Carbonization Rank

  • Kim, Jae-kwan (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Park, Seok-un (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Shin, Dong-ik (KEPCO Research Institute, Korea Electric Power Corporation)
  • 투고 : 2019.01.18
  • 심사 : 2019.07.15
  • 발행 : 2019.06.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Spontaneous combustion propensity of various coals of carbonization grade as a pulverized fuel of coal-fired power plant has been tested from an initial temperature of $25^{\circ}C$ to $600^{\circ}C$ by heating in an oven with air to analyze the self-oxidation starting temperature. These tests produce CPT (Cross Point Temperature), IT (Ignition temperature), and CPS (Cross Point Slope) calculated as the slope of time taken for a rapid exothermic oxidation reaction at CPT base. CPS shows a carbonization rank dependence whereby wood pellet has the highest propensity to spontaneous combustion of $20.995^{\circ}C/min$. A sub-bituminous KIDECO coal shows a CPS value of $15.370^{\circ}C/min$, whereas pet coke has the highest carbonization rank at $2.950^{\circ}C/min$. The nature of this trend is most likely attributable to a concentration of volatile matter and oxygen functional groups of coal surface that governs the available component for oxidation, as well as surface area of fuel char, and constant pressure molar heat.

키워드

참고문헌

  1. Kim, J. K., Park, S. U., Lee, H. D., Lee, H. B., Seo, H. S., and Hong, J. S, "Situation of spontaneous ignition of coalyard at domestic coal fired power plant and its characteristics," KEPCO'RI., TM.9337.M2015.0344, 2014, pp.35-42.
  2. Bandyopadhyay, S., Bhadari, D., "Prediction of ignition temperature of a single coal particle, Combustion and flame," Vol.18, No.3, 1972, pp.411-415. https://doi.org/10.1016/S0010-2180(72)80192-5
  3. Ha, D.M., "Relationship between the minimum ignition energy(MIE) and the temperature," Journal of Korean Institute of Fire Science & Engineering, Vol. 11, No. 2, 1997, pp. 3-10.
  4. NF (European Committe for Standard) T20-036"Chemical product for industrial use. determination of relative temperature of spontaneous flammable of solids."
  5. Myles, A. Smith., David, G., "Spontaneous combustion of carbonaceous stockpiles. Part II. Factors affecting the rate of the low-temperature oxidation reaction," Fuel, Vol. 84, 2005, pp. 1161-1170. https://doi.org/10.1016/j.fuel.2004.12.005
  6. KS E3705, Methods for Proximate Analysis of Coal and Coke, 2003.
  7. KS E 3712, Methods for Ultimate Analysis of Coal and Coke, 2004.
  8. KS E 3707, Determination of Calorific Value of Coal and Coke, 2016.
  9. Ryu, C. K., "Database of Self-heating Temperature and Agglomeration of Various Coals," KEPCO Research Institute, CX73-12-0002, 2013, pp. 15-20.
  10. Mok, Y.S.., Choi, J. W., You, D.H., Kim, S.Y., "A study on the autoignition of granulated activated carbon with change of oxygen concentration," Journal of KIIS, Vol. 10, No. 2, 1995, pp.84-91.