What is the principle of wet ammonia desulfurization?
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There is plenty of information available on wet ammonia-based desulfurization, and the reaction equation is given as (1) (NH4)OH + SO2 = (NH4)HSO3； (2) (NH4)HSO3 + NH4OH = (NH4)2SO3 + H2O ； (3) (NH4)2SO3 + SO2 + H2O = NH4HSO3; some say it is essentially an acid-base neutralization reaction, while others say it is essentially the third equation. I’m a bit confused about how to truly understand the essence of this process
First, sulfur dioxide in the flue gas reacts with water to form sulfurous acid; then it absorbs ammonia to produce ammonium sulfite. Subsequently, ammonium bisulfite is formed through cyclic spraying, and it is then oxidized by an oxidation blower to yield stable ammonium salts