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Show BABCOCK & WILCOX'S A P P R O A C H TO AN INTEGRATED L O W EMISSION P O W E R PLANT D. A. Madden and G. A. Farthing Babcock & Wilcox - Research and Development Division Alliance, Ohio 44601 W. F. Gohara Babcock & Wilcox - Environmental Equipment Division Barberton, Ohio 44203 C. R. Kalamets Babcock & Wilcox - Fossil Power Division Barberton, Ohio 44203 ABSTRACT The cost-effective integration of the various systems in a power plant is a major consideration in the selection of control technologies for compliance with the Clean Air Act Amendments of 1990. Babcock & Wilcox (B&W) is currently investigating the interactions and impacts of incorporating the most effective pollution control technologies as integral parts of a coal-fired power plant in a project entitled. "Engineering Development of Advanced Coal-Fired Low Emission Boiler Systems (LEBS)." The program is sponsored by the U.S. Department of Energy's Pittsburgh Energy Technology Center. The overall goal of the DOE's program is to dramatically improve environmental performance and thermal efficiency of convenUonal, Rankine cycle, coal-fired power plants. Specific objectives of B & W s LEBS project include the development of S O x and N O x removal systems capable of reducing emissions to one-third of that allowed under the current N e w Source Performance Standards (NSPS), a particulates removal system capable of one-half the regulated NSPS amount, as well as addressing the concerns of solid waste generation and air toxics regulation. While meeting each objective separately, the technologies of choice must be designed to complement one another. Some examples of the interactions that are being addressed in B & W s LEBS project are: • How furnace sorbent injection processes impact boiler design and performance. • How low-NOx operaUon impacts boiler design, performance, and reliability. • How the SOx. NOx. and particulate removal systems affect auxiliary power consumption. solid waste generation, and the formation, partitioning and emissions of air toxic species. Environmental controls will be integrated with combustion, heat transfer, and all other aspects of power plant design to create a power plant design for the 21st century. The cost-effective integration of advanced emissions control, boiler, and balance-of-plant subsystems is discussed. 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 (SOJ. nitrogen oxides (NOx), and air toxics. Controlling the amount and type of solid waste created by a power plant will also be an issue. If coal is to remain the fuel of choice for power generaUon. the plants of the 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-PETC) has inlUated a program called Combustion 2000 to address the clean and efficient use of coal for power generation for the first decade of the 21st century.*1) The Com- 1 Paper No. 11-13 |