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Combustion characteristics of droplets of coal/oil and coal/oil/water mixtures

Author

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  • Law, C.K.
  • Law, H.K.
  • Lee, C.H.

Abstract

The utilization of coal/oil mixtures in furnaces and boilers appears to be a viable short-to-medium range solution to partially alleviate the demand on petroleum supply with minimum combustor modifications. The present investigation first demonstrates that the combustion characteristics of the coal/oil mixture droplets depend intimately on the intensity of internal circulation. Rapid internal motion favors batch-distillation-type vaporization which causes the coal particles to agglomerate. On the other hand, slow internal motion traps the volatile components in the inner core of the rapidly-heated droplet and may eventually lead to internal boiling and subsequently fragmentation of the droplet. Experimental results reveal a mixed behavior, although the degree of agglomeration is significant even at moderate levels of coal loading. It is subsequently shown that the addition of small quantities of water significantly enhances the potential and intensity of droplet explosion. Practical implications of the present results are also discussed.

Suggested Citation

  • Law, C.K. & Law, H.K. & Lee, C.H., 1979. "Combustion characteristics of droplets of coal/oil and coal/oil/water mixtures," Energy, Elsevier, vol. 4(2), pages 329-339.
    • Handle: RePEc:eee:energy:v:4:y:1979:i:2:p:329-339
    DOI: 10.1016/0360-5442(79)90132-4
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