Conversion of industrial boilers to burn coal water fuel. Phase 1, Pilot-scale development and testing: Final report.

摘要

The objective of this project was to develop and prove the feasibility of an industrial coal-fired cyclone retrofit system which will maintain acceptable NO(sub x), SO(sub x), and particulate emissions without operational problems. The system consists of a pilot-scale cyclone combustor (6-million Btu/hr), a fuel pumping and handling subsystem, and a fuel injector/lighter subsystem. Coal-water fuel (CWF) is used instead of dry coal to maintain the same level of handling, storage, pumping, and combustion as is normally experienced with oil usage. This is an important aspect of the system since most industrial/commercial/institutional users could not accept dry coal handling and preparation requirements. A specific task was created to specify the coal, perform laboratory tests, and supervise commercial production of CWF for the pilot-scale tests. Emissions goals of the project were to meet new source performance standards (NSPSs) for NO(sub x) and SO(sub x) and to reduce ash input to the main furnace by 80%. Finally, an economic review and sensitivity analysis of a full-scale system (100-million Btu/hr) was made for advanced combustion systems and technology development. Estimates of boiler conversion, auxiliary equipment, operating, and other costs associated with a retrofit were made. An investment analysis was then performed including sensitivity to capital cost, O&M costs, and premium fuel and CWF prices. 29 refs., 52 figs., 15 tabs.