MCL Intelligent High Efficiency Denitrification (iHe-SNCR) Principle

Based on the SNCR denitrification principle, ammonia or urea solution is used to reduce NOx in the flue gas without a catalyst to achieve the purpose of denitrification. The main reaction chemical equation is as follows:

However, it has been found through multiple project practices that when the temperature is too high or the NH3 is excessive or the O2 content is too high, the following side reactions will occur: 4NH3 + 5O2 → 4NO + 6H2O这When the content is too low, it is not conducive to the denitration reduction reaction. This is also the reason why the NOx concentration increases instead of decreases during SNCR denitration, even though the injection amount of reducing agent is increased.O2