SO

2

and NO

x

in flue gas produced by Coking furnace heating are the main pollutants in the atmosphere. The new environmental protection act sets limits on SO

2

and NO

x

emissions from flue gas

it is an important for coking workers to control the content of SO

2

and NO

x

in the exhaust gas from the chimney of coking furnace. Comparison of the real-time monitoring data of exhaust gas emissions from the chimney of coke oven with different heating gas the influence of different heating gas on the discharge standard of coke oven chimney is very great. Proper heating of gas is beneficial to the exhaust gas emission of coke oven chimney.