Dynamic Model of a Steam Boiler Furnace

Abstract

Variation in fuel flow rate and load demand of a steam boiler leads to variation of gas-dynamic characteristics of furnace. Based on the furnace dynamic model, the furnace temperature and pressure and flue gas mass flow rate are predicted when variation in fuel flow rate occurs. The simulated variation of furnace pressure and temperature is higher for natural gas fired boiler than coal fired boiler due to higher combustion reaction rate of natural gas.