A mathematical model of single char particle combustion in circulating fluidized bed combustor (CFBC)is developed in this paper. Its numerical solution in operating conditions of CFBC verifies the nature of a phenomen...A mathematical model of single char particle combustion in circulating fluidized bed combustor (CFBC)is developed in this paper. Its numerical solution in operating conditions of CFBC verifies the nature of a phenomenon that the distribution of carbon content of char particles has a peak value versus their diameters. The results show that the temperature of smaller char particle is close to the bed temperature, and there also exits a peak value for the burn-out time of char particles versus their diameters.The countermeasures are presented to improve combustion of fine particles, such as use of the fly-ash recirculation, the hot cyclone, and so on.展开更多
文摘A mathematical model of single char particle combustion in circulating fluidized bed combustor (CFBC)is developed in this paper. Its numerical solution in operating conditions of CFBC verifies the nature of a phenomenon that the distribution of carbon content of char particles has a peak value versus their diameters. The results show that the temperature of smaller char particle is close to the bed temperature, and there also exits a peak value for the burn-out time of char particles versus their diameters.The countermeasures are presented to improve combustion of fine particles, such as use of the fly-ash recirculation, the hot cyclone, and so on.
