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Show ABSTRACT Occidental Petroleum rprpn£A»4r>n is developing coal-water mixture (CWM) as a means for conversion of oil-burning equipment to coal. Although the handling and storage characteristics of CWM are similar to residual fuel oil, preliminary research has shown its combustion characteristics are quite different. Thus a CWM formula must be optimal in terms of both rheological and combustion qualities to be a viable fuel. Subscale combustion tests were performed by KVB to determine the effect of CWM compositional variables and firing parameters on atomization quality and combustion performance. CWM compositional variables examined included coal type, coal loading, particle size distribution and stabilizing additives. Operational parameters included furnace heat release rate, furnace excess oxygen, and atomization quality. Flame stability, combustion efficiency, particulates, SO-, and NO were evaluated. These data were used to establish a CWM specification and guidelines for commercial use. SECTION 1.0 INTRODUCTION 1 .1 BACKGROUND The use of coal in the form of a slurry fuel is among the coal utilization scenarios that have received increased interest in recent years. Slurry fuels are viewed as an attractive fuel oil substitute since slurries are fluid and can be used in oil-fired facilities with minimum modification to existing equipment. Slurries can be pumped in the same manner as fuel oil, and, as such, coal transportation to individual industrial sites can be achieved without on-site coal handling and preparation facilities. This factor is an important advantage, since many sites do not have provisions for 1 KVB72-P327 D194 |