Exhaust gases from power generation boilers, diesel engines, and other sources contain SOx (sulfur oxides), and the system removes these components by bringing them into contact with an alkaline agent. First, the system cools the high-temperature, harmful gases in a pre-cooling chamber, and then it sends them into the desulfurization unit. Inside the desulfurization tower, the gases meet the circulating fluid supplied from above onto trays (perforated plates), so the gas and liquid contact each other intensively and the system absorbs and removes SOx efficiently.

To control the concentration of reactive salts, the operator continuously extracts part of the circulating fluid from the desulfurization unit. This circulating fluid contains many solids, such as magnesium sulfite and unburned carbon, which act as COD components. Therefore, the system first sends the fluid to the oxidation tank and reduces COD efficiently there, and then it passes the fluid through an SS filter to separate the solids before the operator finally discharges the treated liquid.