Ammonia nitrogen in wastewater from catalytic flue gas desulfurization
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What are the control criteria for ammonia nitrogen in the wastewater generated from catalytic flue gas desulfurization? And where does this wastewater go?
8mg/L, directly discharged spores
Wastewater is directly evaporated using a spray dryer
According to GB31570, the control limit for ammonia nitrogen is 8.0 mg/L. Under normal circumstances, ammonia nitrogen levels do not exceed the allowed limits, unless, first, an incomplete regeneration process is used, resulting in a high ammonia concentration in the flue gases; and second, the carbon monoxide burner (or carbon monoxide boiler) does not have the necessary conditions to burn off all the ammonia present in those flue gases ； Secondly, if the SCR process is used for denitration, ammonia leakage may also lead to excessive ammonia nitrogen levels in the wastewater discharged.
At what temperature can an incompletely regenerated CO burner burn all the ammonia completely?