METHOD FOR REDUCING CONTENT OF NOX IN FLUE GAS AT TIME OF HEATING OF COKE OVEN AND COKE OVEN

摘要

In this process, combustion stages at high and low levels and a flue gas recycle at the level of the bottom of the heating flue are used. It is provided that the circulating flow rate is set to between 20 % and 50 % and the stage ratio for a number I of stages greater than/equal to 2 is set to between 80/I % and 140/I %, the upper combustion stages being arranged between 45 % - 10 % x (I-1) and 45 % - 10 % x (I-1). …IMAGE…