1984•Am. Soc. Mech. Eng., (Pap.); (United States)Requires access
The effects of firing coal-water mixture in oil-designed steam generators
M.J. Hargrove, T.C. Debridge, Gregory N. Liljedahl, R.K. Manfred
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Abstract
Coal-water mixture fuels have been evaluated as substitutes for oil under an EPRI contract. Loadlimiting factors were determined and operating costs were estimated for four utility units. Four typical steam generators designed for oil firing, ranging from 400 to 850 MW, built by three manufacturers, were analyzed. Two different CWM's were assumed to be fired. The analyses showed load deratings ranged from 15 to 62 percent. Retrofit modifications for the study boilers included new furnace bottoms, furnace wall deslaggers, burner components, and fly ash hoppers. Balance of plant modifications included fuel handling and ash removal systems. An evaluation of the retrofit costs versus the fuel cost savings showed that CWS is an economical fuel for converting utility steam generators.