STATUS AND DEMONSTRATION OF THE BW DRB-4Z BURNER DEVELOPED FOR BW's ADVANCED COAL-FIRED LOW-EMISSION BOILER SYSTEM

摘要

Since 1992, Babcock & Wilcox has been under contract to the U.S. Department of Energy's (DOE) Federal Energy Technology Center (FETC) in Pittsburgh to develop a Low-Emission Boiler System (LEBS) under their Combustion 2000 program. The objective of the LEBS program is to develop an advanced generating plant design, ready for commercial deployment in the year 2000, which achieves extremely low emissions and high efficiency at a cost of electricity (COE) at or below the COE of a commercial PC plant meeting New Source Performance Standards (NSPS). B&W has coupled advanced environmental control technologies, capable of achieving emissions of SO{sub}x, NO{sub}x and particulate far below current NSPS, with an advanced boiler, equipped with improved combustion and heat transfer subsystems to meet these challenging goals. Phases I through III have now been completed and B&W is anticipating demonstration of these technologies in Phase IV. Phase I, completed in 1994, considered a variety of potential advanced technologies and techniques for the control of emissions, and boiler design options to select the combination that would meet the performance goals with the greatest potential for low cost. During Phase II detailed system designs were developed and validated through subsystem testing which resolved nearly all uncertainties and provided the basis for a Commercial Generating Unit (CGU) design. In Phase III the design and cost estimate for 1) a Proof-of-Concept test facility and 2) the Commercial Generating Unit were developed and evaluated against the program goals. While further development, particularly focused on integration of the subsystems, is needed during Phase IV, efforts are underway to begin commercial deployment of key components and subsystems as retrofit technologies. One of the components successfully developed during the Combustion 2000 program which has promising retrofit potential is B&W's new ultra low-N{sub}x DRB-4Z burner. This paper describes the unique development approach which led to the design of B&W's new ultra low-NO{sub}x DRB-4Z burner including its performance during subsystem testing at B&W's Clean Environment Development Facility (CEDF) located at the Alliance Research Center. A description of B&W's plans for demonstration of the DRB-4Z burner in Phase IV and at a utility site will also be described.