Production management and experience on several oven types proves that the damper in ascension pipe and heat gas cock in the cellar can be individually regulated according to coking time so that reduction is realized in terms of the set pressure of gas collecting main,standard temperature of heating wall and the temperature of free space on oven top so as to improve coke quality and by-produces recovery ratio and minimize the NOx formation in the emission. 

"> Individual regulation for coking chamber pressure, Individual regulation for heating gas cock, Standard temperature, Pressure in gas collecting main, Recovery ratio of by-products, NOx ,