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Show 2 • Results of a LIDS solid by-product engineering study on disposal characteristics and possible utilization specifications. B& W is aggressively pursuing ways to reduce or utilize the solid waste produced by its various FGD processes - including the LIDS process - through a variety of development programs. COMBUSTION 2000 PROGRAM BACKGROUND Early in the 21st century, power plant construction is expected to increase significantly in order to meet electricity demands and to replace plants that are at the end of their useful service lives. Also, continuing concerns over acid rain, global climate changes, ozone depletion, and solid waste will place power producers under increased pressure to lower emissions of sulfur dioxide (S02)' nitrogen oxides (NOx), air toxies, and solid waste. If coal is to remain the fuel of choice for power generation, the plants ofthe future will need to be extremely clean, highly efficient, and economical. In order to improve environmental performance and thermal efficiency of future coal-fired power plants, the U.S. Department of Energy's Pittsburgh Energy Technology Center (DOE - PETe) has initiated a program called Combustion 2000 to address the clean and efficient use of coal for power generation for the first decade of the 21 st centuryJ1] The Combustion 2000 program has two parallel engineering development activities that are expected to improve environmental performance and thermal efficiency of future coal-fired power plants: the Low-Emission Boiler System (LEBS) and the High-Performance Power System (HIPPS). The work presented in this paper was conducted under the LEBS portion of the Combustion 2000 program. LEBS workscope calls for the development of a new boiler design equipped with improved combustion and heat transfer subsystems and advanced environmental control technologies capable of achieving emissions of SOx, NOx, and particulates far below current New Source Performance Standards (NSPS). The LESS will use relatively near-term developing technology to lower S02, NOx, air toxics, and particulate emissions, while keeping the cost of electricity comparable to that of conventional technology. Specifically, major goals of the LEBS program are: • NOx - Less than 0.20 Ib/106 Btu of fuel input firing on bituminous coal • SOx - Less than 0.20 Ib S02"1 06 Btu firing coal with at least 3 Ib sulfur/106 Btu • Particulate - Less than 0.015 Ib/106 Btu of fuel input • Waste and Air Toxics - Reduced • Plant Efficiency - Greater than 38% • Commercial Readiness - 2000 or sooner |
