Modeling the processes of combustion products formation in the coal-dust flame

Abstract

In this paper deals with development and application the numerical model for solution of processes at combustion chamber of the industrial boiler. The combustion chamber of the BKZ-75 boiler installed at Shakhtinskaya Thermal Power Plant (Karaganda, Kazakhstan) was chosen as the object of the research. As a result of computational experiments obtained distribution of concentrations of harmful substances: CO2, CO, NO throughout the volume of the combustion chamber and on an output from it. In addition, the authors received a distribution of oxygen depending on the height of the combustion chamber. The minimum and maximum values of the investigated characteristics are established. The dynamics of the change in the characteristics of the heat and mass exchange process in the volume of the researched combustion chamber is shown. Obtained results give quantitative information on the amount of combustion products including harmful substances. The numerical model becomes a tool for investigation and design of combustion chambers with high-efficiency and reliable operation of boiler at thermal power plants. The results of this research has high practical importance, they allow studying heat exchange processes occurring in combustion in real geometry areas (combustion chambers of power plants).