Several problems occurs during operation of boilers equipped with HT-NR3 swirl burners

such as the mass concentration of CO at furnace outlet of is too high

the high temperature corrosion occurs on water wall and the burners nozzles are burnout.Thus

the effects of central air ratio on burner with different diversion flaring angles were investigated

under conditions burning different kinds of coals.The results show that

when the high-volatile coal was burned

with diversion flaring angle of 35°

the center air rate was controlled at about 4.3%

the CO formation was effectively reduced on the premise of inhibiting NOx generation.When the low-volatile coal was burned

with diversion flaring angle of 40°

the central air ratio can be kept below 3.0%

the combustion reaction can be improved while inhibiting the NOxand CO emissions.