On a one-dimensional flame furnace and ignition furnace

blend burning tests for Shenhun coal and high sulfur content coal from Chongqing energy(Nengtou coal) were carried out. The influence of mixing proportion

coal fineness and operation oxygen content on ignition temperature

burn-out rate

slagging and pollutant mission of the blended coals were studied. The results show that

with an increase in mixing proportion of the Nengtou coal

the ignition temperature of the mixed fuel increased

the burn-out rate and slagging tendency decreased

and the emission concentration of NO_x and SO_2 rose substantially. The field blended coal combustion experiment in the power plant boiler indicated that

the boiler efficiency and slagging characteristics had no obvious change

while the NO_x emission concentration increased a little

the SO_2 concentration increased significantly

leading to an increase in the operation cost.