DEVELOPMENT AND TESTING OF A NOVEL COAL PREHEATING TECHNOLOGY FOR NO_x REDUCTION FROM PULVERIZED COAL-FIRED BOILERS

摘要

The Gas Technology Institute's (GTI's) METHANE de-NOX? for PC Boilers is a NO_x reduction process being developed under a Cooperative Agreement with the U.S. DOE to provide a cost effective, combustion-based alternative to SCR. The technology combines GTI's proven METHANE de-NOX reburn technology with a pulverized coal-preheating approach developed for utility PC boilers by the All-Russian Thermal Engineering Institute (VTI). Development targets include NO_x reduction to below 0.15 lb/million Btu, reduced CO_2 emissions, and 55% electricity cost reduction compared to SCR. GTI and VTI are joined in the project by Babcock Borsig Power (BBP), providing commercial PC burner design expertise and testing facilities for 3- and 100-million Btu/h preheat burner prototypes in their Coal Burner Test Facility (CBTF). The paper presents results of VTI's laboratory and scale up (60 MWth ) PC Preheat burner field tests with Russian coals, results of GTI's firing tests and CFD modeling of a natural gas-fired PC preheat combustor along with the status of design and installation of a 3-million Btu/h pilot unit at the CBTF for firing tests with U.S. utility coals.