What are the acidic gases that are flashed out?
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In slag water treatment, the treatment of acidic gases is also very important; they are generally vented in the final stage of flashing. Could someone tell me what the composition of these acidic gases is after flashing?
Sulfur dioxide, carbon dioxide, hydrogen sulfide, hydrocyanic acid, etc
Agree with the view above; to add, there is also ammonia.
If sulfur dioxide and ammonia are present in an aqueous solution, it is impossible for both ammonia and sulfur dioxide to coexist in the gas phase obtained by flash evaporation (at a system temperature below 200 degrees). The pKa of sulfurous acid is 1.85, and the pKa of ammonia is 9.25. If the pH of the aqueous solution is 5.5, more than 99.95% of sulfur dioxide is dissociated, and 99.95% of ammonia is also dissociated. Is there a driving force for the desorption of ammonia gas and sulfur dioxide gas? When pH > 5.5, sulfur dioxide definitely does not desorb ； ph
Mainly CO2, as well as dissolved sulfur dioxide and NH3; very small amounts of H2S and COS, etc
Mainly CO2, H2S, etc., with very small amounts of SO2, HCN, dissolved gases, and COS.