What are the main sources of nitrogen oxides in the flue gases from heating furnaces?
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What are the main sources of nitrogen oxides in the flue gases from heating furnaces? I know there are thermal type, rapid type, and fuel type – which type does it specifically belong to? Fuel gas is gas
The source is a chemical reaction that occurs between nitrogen and oxygen in the air under high temperatures: N2 + O2 = 2NO; 2NO + O2 = 2NO2; H2O + 3NO2 = 2HNO3 + NO. The amount of nitrogen oxides produced is primarily determined by the flame temperature and the excess amount of oxygen.
The furnace temperature can reach up to 800 degrees – will there be a reaction? Isn’t it said that it requires over 1,000 degrees?
The furnace temperature is 800 degrees, but the temperature of combustion is much higher than that