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Combustion characteristics of shredded waste tires in a fluidized bed combustor

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  • Kim, Jung Rae
  • Lee, Jung Soo
  • Kim, Sang Done

Abstract

The effects of bed temperature (700–900 °C), freeboard temperature (600–800 °C) and excess-air ratio (0–100%) on CO, NOx and SO2 emissions, axial temperature profiles, and combustion efficiency of shredded waste tires have been determined in a 76.2 mm i.d. × 1.2m high fluidized-bed combustor. CO-emission levels are maintained below 400 ppm at freeboard temperatures above 750 °C with a 25% excess-air ratio. The freeboard temperature increases sharply at lower excess-air ratios or at bed temperatures below 750 °C. The overall combustion efficiency for waste tires is higher than for bituminous coal and increases with increasing excess-air ratio and bed temperature. The NOx concentration in the flue gas based on 6% O2 has been correlated with the bed temperature, nitrogen fraction in the fuel and excess-air ratio.

Suggested Citation

  • Kim, Jung Rae & Lee, Jung Soo & Kim, Sang Done, 1994. "Combustion characteristics of shredded waste tires in a fluidized bed combustor," Energy, Elsevier, vol. 19(8), pages 845-854.
    • Handle: RePEc:eee:energy:v:19:y:1994:i:8:p:845-854
    DOI: 10.1016/0360-5442(94)90037-X
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