Method of reducing NO.sub.x component of flue gas in heating coking ovens, and an arrangement of coking oven for carrying out the method
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United States of America Patent
Stats
-
Nov 3, 1987
Grant Date -
N/A
app pub date -
Nov 8, 1985
filing date -
Dec 1, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In regenerative coking ovens having vertical heating flues cooperating in pairs, high level and low level combustion stages and means arranged at the bottoms of respective heating flues to recirculate the flue gas, the following measures insure a substantially reduced generation of NO.sub.x contents in the flue gas: the recirculation current rate is between 20% and 50%, the combustion stage ratio is between 40% and 70% and the second combustion stage is arranged between 35% and 55% of the height of the heating flue.
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