On the flat diffusion flame pulverized coal combustion test bench

the radiation spectrums of pulverized coal combustion were measured by the fiber optic spectrometer. Based on the Planck's law and two-color method

the change laws of the coal particle temperature and emissivity of pulverized coal combustion were studied at different hot coflow temperatures(1 400~1 800 K) and oxygen volume fractions(5%~20%). The experimental results show that

the flat diffusion flame burner can provide a stable and uniform hot coflow for the combustion of pulverized coal particles. As oxygen volume fraction in the hot coflow increases from 5% to 20%

the temperature of pulverized coal particle increases

and the average particle temperature increases by about 270 K. At the same oxygen volume fraction

when the hot coflow temperature increases from 1 400 K to 1 800 K

the average particle temperature of pulverized coal combustion increases by about 460 K

the ignition distance is shortened

and the flame brightness increases.