One-dimensional Mathematical Model and Relevant Simulation for Pulverized Coal Combustion in a Boiler Furnace

The combustion mechanism of pulverized coal particles was studied with pulverized coal burning process in the most complex combustion zone of a furnace serving an object of research. On this basis a one dimensional macroscopic model featuring pulverized coal combustion along the furnace height was set up to accurately calculate the burn off rate of the pulverized coal in the furnace. Through a rational simplification of the combustion process of volatile matter and coke in the pulverized coal the model has taken into account the variation of oxygen content during the pulverized coal combustion. With the iso density model of a single pulverized coal particle combustion serving as a basis an integral process of pulverized coal combustion is reflected through the combustion process of pulverized coal of various particle diameters. Thus, a formula for calculating the burn off rate of pulverized coal in a furnace has been developed, meeting the requirements of real time simulation computations. The results of simulation calculations are analyzed and found to be in good agreement with measured data and those given in current literature.