Modeling and Simulation of Startup Process of Circulating Fluidized Bed Boiler
Via analyzing the startup process of intake hot gas ignition of the circulating fluidized bed boiler, the startup process is divided into two phases: the heating by the gas for inert bed material before adding coal and the reaction after coal is fed. The model for the former is obtained based on the energy balance of the whole bed, while for the latter the model consists of dynamic equations of oxygen concentration, total bed material, unburned carbon mass and total energy. Then a simple startup process model of intake hot gas ignition of circulating fluidized bed boiler was established, the results of simulations indicated the model is right. Finally, the validated model system was used to simulate the curves for temperature increase of CFBB in different operating conditions.