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Show System (LEBS) program, and for the future, the High Performance power System (HIPPS) program. Babcock & Wilcox has been developing an advanced generating plant design i~ DOE's Combustion 2000 program entitled, "Engineering Development of Advanced Coal-Ftred Low Emission Boiler System." The objective of the LEBS program is to develop an advanced pulverized coal (PC) fired power generation system for commercial application by the ye~ 2000. Since concerns over acid rain, air toxics, global climate changes, ozone depletion and sobd waste disposal are expected to further tighten regulations for new coal-fired plants, the system must achieve very low emissions and high cycle efficiency at a life cycle cost equivalent to a conventional PC plant meeting New Source Performance Standards (NSPS). B&W has coupled advanced environmental control technologies capable of achieving emissions of NOx, SOx, and particulate far below current NSPS with an advanced boiler equipped with improved combustion and heat transfer subsystems to meet this objective. The B&W LEBS plant uses conventional state-of-the-art equipment along with developing new technologies to meet the program goals. This combination of new and proven technologies allows B& W to meet the current and future demands in the marketplace. The goals of the LEBS program have been continually refined since initial work began in 1992 in order to maintain relevance due to technological advances. Design performance goals began as no more than 0.21b NO/MBtu, 0.21b SO/MBtu, and 0.015 lb particulatefMBtu with at least 38% net plant efficiency (HHV) while reducing solid wastes and complying with anticipated air toxics regulations without increasing cost relative to a conventional NSPS plant. These goals have evolved over time to the present environmental performance targets of no more than 0.1 lb NO/MBtu, 0.1 lb SO/MBtu, and 0.01 lb particulatelMBtu with a net plant efficiency of 42% (HHV) . . B&W organized five teams to focus on design of the major subsystems: NOx Reduction, SO/Air ToxicslParticulate Collection, Controls and Sensors, Boiler, and Balance-of-Plant (BOP). As a result of the Phase I effort, completed in 1994, B&W's preliminary design consists of a boiler employing ultra-supercritical steam conditions which integrates advanced 10w-NOx combustion and limestone injection dry scrubbing (LIDS) technologies[2]. NOx REGULATIONS As global consumption of coal increases, the potential for an escalation in global air emissions and waste generation intensifies. However, countries are imposing tighter emission control standards, increasing the demand for clean coal technologies. Programs such as Combustion 2000 allow for advancements in technologies to meet these demands of the marketplace. The goal of the NOx subsystem in the B&W LEBS project is to reduce NOx emissions by 80-95% over uncontrolled levels. This i~ to be ac~eved utilizing advanced flue gas ~leanup technologies only to the extent that combustion techniques alone cannot reach the reqUired emissions levels, due to cost considerations. Although the LEBS program focuses on a complete low-emission boiler system for new installations, this program also allows for individual technological advancement in areas suitable Page - 3 |