To develop a semi-quantitative method for the relationship between steam coal quality characteristics and heat transfer characteristics in furnace

much theoretical and mathematical analysis was performed on quality analysis data of 170 pieces of coal that used in large domestic power plants. This study discussed the influences of coal quality characteristics on flue gas parameters and flue gas parameters in the furnace on the radiation released heat. Based on the principle of heat balance

through a large number of data calculations and theoretical analysis

a simple semi-quantitative relationship was proposed among net calorific value of coal

flue gas temperature of the furnace outlet

and released heat of flue gas in the furnace. A 3 D functional relationship with high accuracy and reliability and wide application was fitted. These research results can provide a simple and reliable function assessment method for the design and operation of large-scale boilers and the optimization of control systems.