Dynamic combustion of suspended coal-water fuel from enrichment wastes in a turbulent furnace

Abstract

Coal is an important and inexpensive fuel used in industrial heat generators of various types and in heat� ing residential and public buildings. Customer requirements on coal quality are met by enrichment, which gives rise to finely disperse tailings. The best means of disposing of enrichment wastes is their combustion in water–coal suspensions [1]. In that case, all the coal is used directly in combustion, and the ash formed may be used in construction. A promising approach is the combustion of coal–water fuel in turbulent furnaces. In constructing a dynamic model of the furnace processes during the combustion of coal–water fuel, we make the following approximations regarding the furnace chamber and combustion process. Two sepa� rate fluxes enter the furnace: suspended coal fuel (con� sisting of the organic component, ash, moisture, and volatile components); and air. Consequently, the het� erogeneous mixture within the furnace consists of two phases: a condensed phase and a gas phase.