In the light of troublesome problems occurred on boiler No.2 in Zhujiang Power Plant

such as larger deviation of flue gas temperature at A

B side after final stage reheater

and temperature of partial flue gas being higher than the designed value

analog computation of combustion performance in the furnace has been carried out by using the CFX-TASCFLOW heat transfer calculating software for three dimensional flowing combustion

and finally a scheme of reverse tangential retrofitting of the burners is determined

and optimizing adjustment of combustion in the boiler is performed after implementation of the retrofitting scheme. The results of test show

after retrofitting the burners

the flue gas temperature deviation at A

B side having been lowered to be 36℃

the max

flue gas temperature evenly lowered to be 30℃

the max

tube wall temperature lowered to be 4～10℃

the risk of boiler tube burst due to over temperature being reduced

effectively ensuring safe and economic operation of the boiler.