OCR Text |
Show INTRODUCTION The cyclonic combustion concept, which provides high combustion-intensity and high combustion-efficiency with low excess air, offers many advantages for waste incineration over commercially-available incinerators. The cyclonic incinerator allows better mixing and temperature uniformity, higher destruction efficiency, wider range of operating parameters, higher flexibility to variation in waste properties, dry ash and/or molten slag operation, and more efficient heat recovery at reduced capital and operating costs. The development of the cyclonic incineration demonstration system by the Institute of Gas Technology (IGT) and York-Shipley, Inc. (Y-S) was based on successful results from a research and development program at IGT's Energy Development Center (EDC), using a pilot-scale cyclonic incinerator designed by IGT and manufactured by Y-S. The unit was installed and tested at IGT's Combustion Research Facility in Chicago. The program sought to identify a preferred cyclonic chamber configuration, combustion temperature, and ashing and slagging characteristics while minimizing auxiliary natural gas consumption. Together with an industrial client, who providen the wastewater for the program, testing and optimization of the cyclonic incinerator were successfully completed. Sufficient data were acquired to design and build a larger size demonstration system (from 2 X 106 to 3 X 106 Btu/h total firing rate) at the industrial site. Detailed results from the testing (wastewater characteristics, flue gas analyses, incineration rates, combustion temperatures, modes of operation, bottom and fly ash characteristics, etc.), as well as design features of the pilot-scale incineration system have been reported earlier in a paper entitled, "Development and Commercialization of an Efficient Cyclonic Incinerator for Wastes," presented by IGT and Y-S at the Symposium on Energy from Biomass and Wastes VIII, Lake Buena Vista, Florida, January 30-February 3, 1984. Based on these data, the cyclonic incineration demonstration system, incinerating the same wastewater, has been jointly designed, constructed, tested, and operated by IGT, Y-S, and the industrial client at his plant. The demonstration system description, equipment design characteristics, test results, system and equipment operating parameters, as well as some operational challenges experienced, are the subject of this paper. 2 |