Numerical simulation of low NO_X pulverized-coal burners in same velocity of two channels in utility boilers

The velocity difference of air in two channels of the conventional dense-dilute pulverized-coal concentration burner is 6-8 m/s,which impacts combustion stabilization,burning efficiency,and NOX emission.The process of combustion in a 350 MW boiler was simulated and the results showed that the dense-dilute pulverized-coal concentration combustion technology did not change furnace radiation heat transfer,and NOX emission of low NOX pulverized-coal burner in same velocity of two channels was 12% lower than that of the conventional dense-dilute pulverized-coal concentration burner.