Evaluation of lignite coal in waste character as coal-water slurry fuel


Boylu F. , Atesok G., Özer M. , Dincer H.

22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005, Pittsburgh, PA, United States Of America, 12 - 15 September 2005, vol.2, pp.1723-1732 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 2
  • City: Pittsburgh, PA
  • Country: United States Of America
  • Page Numbers: pp.1723-1732

Abstract

This study covers the studies of CWS preparation and combustion properties on the Turkish lignite with low coal calorific (3675 Kcal/kg) value and high ash forming minerals (41 %) that may be regarded as coal wastes. The particle size, coal concentration, air/fuel ratio and atomizing air pressure effects on both slurry preparation and combustion processes were investigated. On preparation of CWS studies the low coal concentration in slurries was reached for a required viscosity and stability values. The slurries with solids concentration of 50 % (by weight) and maximum stability of 7 days were obtained with this kind of coal. But the high combustion efficiencies were reached although the coal property affects the CWS preparation process. Combustion efficiencies ranged from 96,5 % to 99 % were obtained with heat loss of 22 % of total heat produced, although it consists of 60 % water (by weight). With this study it was emphasized that the CWS prepared by low rank coals could be used as fuel without any upgrading processes. © (2005) by the International Pittsburgh Coal Conference.