METHOD OF OPERATING COKE OVEN

摘要

PROBLEM TO BE SOLVED: To provide a method of operating a coke oven by which the amount of nitrogen oxides generated is reduced by improving the state of combustion in the height direction of the combustion chamber on the combustion side to prevent the occurrence of localized high temperature zones. SOLUTION: Coke oven gas is burnt by feeding the coke oven gas and combustion-assisting air to the combustion side 12 of the combustion chamber 10. The combustion waste gas is discharged from the discharge side 13 of the combustion chamber 10. Part of the combustion waste gas in the combustion side 12 is circulated by feeding it to the combustion side 12 from the bottom to reduce the amount of NOxgenerated by the combustion. The combustion-assisting air is fed at multiple stages over the height direction of the combustion side 12. The amount of the circulating combustion waste gas is≥7 volume% and≤18 volume% of the total amount of the combustion waste gas generated in the combustion side 12. COPYRIGHT: (C)2008,JPO&INPIT