Method for reducing NO lower x content in flue gas when heating 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…