Heat Transfer Characteristics in a Pressurized Oxy-fuel Fluidized Bed Boiler

A model of pressurized oxy-fuel fluidized bed boiler was established,with which the in-furnace heat-transfer characteristics were studied by analyzing relevant influencing factors such as the particle size,the porosity,the bed temperature and the pressure,etc.Results show that the heat-transfer coefficient increases with reducing particle size,decreasing porosity,rising temperature and elevating pressure.However,when the pressure gets up to a certain value,the heat-transfer coefficient will tend to remain stable even if the pressure continues to be elevated.