In order to eliminate residual swirling at outlet of the furnace in tangential firing boiler

so as to weaken the velocity deviation and the thermal deviation of gas flow in the flue duct

a method of controlling heat deviation of superheater inside the horizontal flue duct by using jet-flow readjustment has been put forward.Through measurement of velocity at inlet of the horizontal flue duct and test of heat deviation distrivution in the superheater

an identical trend of heat deviation distribution in the superheater and gas flow velocity deviation at inlet of the horizontal flue duct has been obtained.Results of test show that the heat deviation coefficient in superheater after installing the jet-flow system has been remarkably reduced from that before installing the jet-flow system

realizing the purpose of controlling the heat deviation in horizontal flue duct

decreasing greatly the failures of tube-burst.