Integral Dynamic Model and Simulation of the 440 t/h Circulating Fluidized Bed Boiler

Integral Dynamic Modeling of the Circulating Fluidized Bed Boiler(CFBB) is important for the unit design,online optimizationand development of control system.In this paper,the models of the combustion system and the steam-water system are proposed through lumped method,which are based on the analysis of dynamic characteristics of the bed temperature and drum-steam pressure of CFBB.Through the furnace heat transfer,both of the models are combined to obtain the integral dynamic model,which considered the coal feed,primary air and secondary air as inputs.And the result of the real-time simulation agrees with the actual data well.