Determination of optimum blending ratio during coal blends combustion

This paper reports the experimental research on combustion and pollution pr operties of several typical Chinese individual coals and coal blends and th e methods determined optimum blending ratios. Thermogravimetry analysis tec hnique and a drop-tube furnace were used to investigate the ignition and bu rnout behavior and NOx emission characteristics. Ash chemical composition a nd fusion temperature was also measured. The effects of the blending ratios on ignition, burnout, slagging and NOx emissions have been analyzed. The f uzzy logic approach has been used to determine the optimum blending ratios based on experimental data which provide a scientific basis for design and operation of power station blending coal. Calculation results were comparab le with that of results obtained from combustion test carried out in a boil er simulator furnace.