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Show size is reduced, combustion efficiency is increased, however, it was also shown that significant increases in viscosity were observed as particle size was reduced. As coal loadings increase, this increase in apparent viscosity may adversely affect both atomization and pumpability of the fuel mixture. 4. As was the case in coal-oil mixtures with No. 6 fuel oil, the sonic burner system is by far the most effective technique for this type of combustion process. The sonic burner technique is strongly recommended when firing any type of coal-oil mixture. ACKNOWLEDGEMENTS The work reported in this paper was made possible through grants from: the Board of Regents of the State of Louisiana, the Department of Natural Resources of the State of Louisiana, and the Center for Energy Studies of Louisiana State University. Additionally, sincere appreciation is expressed to Mr. Roy West of Gulf States Utilities Company for his assistance in obtaining the coals used in this study. Further acknowledgement is extended to the Howe-Baker Co. of Tyler, Texas for assistance with the sonic burner system. REFERENCES 1. Cundy, V., and Maples, D., Fuel, 1982, 61, 1277. 2. Bienstock, D., and Jamgochian, E. M., Fuel, 1981, 60, 851. 3. Bergman, P.D., et al., "Economic Considerations for Industrial Firing of Coal-Oil Mixtures," First International Symposium on Coal-Oil Mixture Combustion, May, 1978. 4. Cundy, V., and Maples, D., "Performance of a Sonic Burner System Firing Coal Oil Mixtures," Accepted for Publication, Fuel, Aug., 1983. 18 |