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Show previously unknown to the authors that the majority of excess air was supplied to the kiln rather than the SCC in the prior operation. Such practice was discontinued after the process modifications. Once corrected for these actual operating parameters, the model calculated results are quite consistent with actual operating data, as shown in Tables 3 & 4. The measurement of kiln ash dropout temperature was very difficult, because the ash started losing heat immediately upon discharge from the exit chute into a metal drum. The ash temperature was taken with a thermocouple inserted into the ash drum once it had been filled, and it was presumably lower than the true temperature. It was found that the measured ash temperatures increased as the kiln throughput increased, with the same kiln control temperature. Apparently, this was due to the shorter heat loss duration before ash temperature measurement at the higher throughput. The conclusion of the test was that heat transfer was not a limitation for the MIS up to a 5000 lb/hr throughput, as predicted by the model. ACKNOWLEDGMENTS The authors would like to thank the EPA Office of Research & Development for the selection of the Linde Oxygen Combustion System for use in the EPA Mobile Incinerator, and Enviresponse, Inc. for the successful execution of this demonstration program. In particular, we would like to thank Mr. F. J. Freestone of the EPA and Dr. G. D. Gupta and Mr. R. H. Sawyer of Enviresponse for their support and review of this paper. Within Union Carbide Corporation, the following persons deserve special acknowledgment for their contributions: A. R. Barlow, W. J. Snyder, R. R. Hoerter and R. L. Chambers. REFERENCES (1) Gupta, G.D., et al, "Operating Experiences with EPA's Mobile Incineration System," Int'l Symposium on Hazardous and Municipal Waste Incineration, AFRC, Nov. 2-4, Palm Springs, CA. (2) Mortensen, H., et al, "Destruction of Dioxin-Contaminated Solids and Liquids by Mobile Incineration," USEPA report, EPA Contract #68-03-3255, Hazardous Waste Engineering Reserach Laboratory, Cincinnati, Ohio, April, 1987. (3) Anderson, J.E., U. S. Patent Nos. 4,378,205 and 4,541,796, "Oxygen Aspirator Burner and Process for Firing a Furnace," March 29, 1983, September 17, 1985. (4) Anderson, J. E., "A Low NOx , Low Temperature Oxygen-Fuel Burner," Proceedings of the Americal Society of Metals, 1986 Symposium on Industrial Combustion Technologies, Chicago, Illinois, April 29, 1986. (5) Ho, Min-Da and Ding, M.G., "Proposed Innovative Oxygen Combustion System for the Incineration of Hazardous Waste," Hazardous Materials Management Conference & Exhibition/West, December 3-5, 1986, Long Beach, CA. (6) Linak, W.P., J.D. Kilgroe, J.A. McSorley, J.O.L. Wendt and J.E. Durn, "On the Occurrence of Transient Puffs in a Rotary Kiln Incinerator Simulator, Part I," JAPCA, VOL. 37, No.1, Jan. 1987. - 8 - |
