Circulating fluidized bed (CFB) combustion technology is rapidly developed due to its fuel flexibility and low pollutant emission especially in China. The world's first 600 MWe supercritical CFB boiler has been passed its 168 hours operation smoothly with full load on April 14, 2014 in Baima Power Generation Plant at Sichuan Province in China, and put into commercial operation successfully. It is a remarkable milestone in the development of the circulating fluidized bed technology in the world.Some key issues were studied during its development including the solids particle mixing in dense bed, bed material balance and its overturn condition between a breeches-leg, gas-solids flow distribution among different cyclones, heat transfer and heat flux distributions on waterwall and suspended heat transfer walls in the furnace. These aspects are important in developing a large size supercritical CFB boiler. This article reports the main research status on those aspects and the operation of the 600 MWe supercritical CFB boiler. The successful and smooth operation of the boiler verified these important considerations in the design and research results.
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