Co-firing ammonia in pulverized coal boilers is a promising method to reduce carbon emissions from coal-fired power plants. In this paper

the numerical study on ammonia-blended combustion of a 350 MW pulverized coal boiler is carried out. The effects of ammonia blending ratio (20%~40%) and boiler load on the temperature field

fuel burnout characteristics and NOx formation are discussed. The results show that at high loads (100%BMCR

75%THA)

ammonia addition mainly affects the flue gas temperature in the upper region of the burner. With the increase of ammonia content

the flue gas temperature of the furnace decreases by 30~190 K

the burnout performance of pulverized coal decreases

and the carbon content of fly ash increases by 0.23%~1.93%. At medium and low loads (50%THA

30%THA)

the flue gas temperature of the furnace decreases by 60~240 K

the burnout performance of pulverized coal decreases

and the carbon content of fly ash increases by 0.30%~1.11%. Under various operating conditions

the generation of NO decreases after ammonia blending. NH3 can be fully burned in the primary combustion zone

and the risk of ammonia escape is low. The result shows that the co-combustion of ammonia and coal will not lead to excessive NOx emissions of the boiler. In general

NH3 is fed into the furnace with the primary air

which reduces the influence on the original flow field. This method can be used to realize the co-combustion of ammonia and coal in the pulverized coal boiler.