Ammonia dosing in flue gas

Ammonia dosing is a water treatment process that is commonly used in flue gas desulfurization (FGD) systems in power plants. The process involves adding ammonia to the FGD wastewater, which reacts with the sulfur dioxide (SO2) in the flue gas to form ammonium sulfate. The ammonium sulfate is then removed from the wastewater, leaving behind clean water that can be discharged safely.

Ammonia dosing has several benefits, including:

Ammonia dosing is typically done through a dosing system that adds the ammonia to the FGD wastewater at a controlled rate. The dosing rate is determined by the flow rate of the wastewater and the concentration of SO2 in the flue gas.

It is important to note that excessive ammonia dosing can lead to the formation of ammonium bisulfate, which is a corrosive compound that can cause damage to the FGD system. Therefore, the ammonia dosing rate should be carefully controlled and monitored to maintain the proper balance between pollutant removal and system integrity.

In summary, ammonia dosing is an important water treatment process used in flue gas desulfurization systems in power plants. The dosing rate should be carefully controlled and monitored to maintain the proper balance between pollutant removal and system integrity.