STATE OF THE ART OXY-COAL COMBUSTION TECHNOLOGY FOR CO2 CAPTURE FROM COAL-FIRED BOILERS “ARE WE READY FOR COMMERCIAL INSTALLATION?”

摘要

The research and development of oxy-coal combustion for CO2 capture from coal-fired boilers has been the subject of numerous studies. Recently, The Babcock & Wilcox Company (B&W) and Air Liquide (AL), with sponsorship of the U.S. Department of Energy (DOE), have finished a pilot-scale evaluation of the technology at 1.5 MWth (5 MBtu/hr) using scale model commercial boiler equipment. The oxy-coal combustion flame stability, boiler and convective pass heat transfer, boiler thermodynamic performance and NO_x emission levels compared favorably to the air/coal firing conditions. A steam generating plant engineering and economic evaluation also showed that oxy-coal combustion is a technically feasible and economically viable technology. B&W and AL are currently, with sponsorship from the U.S. DOE, undertaking a project to significantly broaden the applicability of oxy-coal combustion technology to the existing fleet of coal-fired boilers. Upon successful completion of this development effort, pilot-scale oxy-coal combustion test data will be available for application and scale-up to both wall-fired and Cyclone~(TM) boilers that burn bituminous, sub-bituminous or lignite coal. This paper will describe the research performed to date and the plans for the current 30 MWth pilot-scale tests being planned this year.