KEPCO Journal on Electric Power and Energy

Korea Electric Power Corporation (한국전력공사)
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Derivation of TMA Slagging Indices for Blended Coals

  • Park, Ho Young (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Baek, Se Hyun (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Kim, Hyun Hee (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Park, Sang Bin (KEPCO Research Institute, Korea Electric Power Corporation)
  • Received : 2017.08.08
  • Accepted : 2017.10.10
  • Published : 2017.12.30
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Abstract

The present paper describes the slagging field data obtained with the one-dimensional process model for the 500 MW tangentially coal fired boiler in Korea. To obtain slagging field data in terms of thermal resistances [$m^2{\cdot}^{\circ}C/kW$], a number of plant data were collected and analyzed with the one-dimensional modelling software at 500 MW full load. The slagging field data for the primary superheater were obtained for six coal blends, and compared with two TMA (Thermo-Mechanical analyzer) slagging indices and the numerical slagging index, along with the conventional slagging indices which were modified with the ash loading. The advanced two TMA indices for six blended coals give a good slagging tendency when comparing them with the slagging field data, while the modified conventional slagging indices give a relatively poor agreement.

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References

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