How is NOx generated in sulfur chimneys?
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There is NOx in the exhaust chimney of the sulfur plant. I would like to ask everyone: how does NOx come about? What causes its formation? Is it produced by the combustion of acidic gases? Is it still produced by the exhaust gas incinerator? Please ask an expert to explain, thank you, bonus points
Based on actual work experience, I only know that injecting too much ammonia with quench water leads to high NOx levels in the flue gas; I have not encountered other situations.
The actual situation here is that when the wind speed is low, (this might be due to an excessive amount of air supply in our area; in such cases, the wind not only aids combustion but also has a cooling effect when it is present in excess!) ) And when the burner temperature is high, nitrogen oxides increase! This is also a pattern that was discovered during a tuning operation; after doing some research, it turned out that high temperatures increase the formation of nitrogen oxides!
When the organic content in sulfur is high, nitrogen oxides are produced during combustion.
If the NH3 in the amino-acid-containing gas from the acidic water stripping unit is not completely burned in the sulfur production furnace, nitrogen oxides such as NO and NO2 are generated.