Abstract
Most proven SO2 scrubbing processes are applied under quasi-steady-state conditions. Due to the low solubility of SO2 in water, an alkali is added in the suspended or dissolved state and fed proportionally to the quantity of SO2 entering the scrubber. Highly variable gas composition and flow requires careful monitoring and unusual flexibility of the scrubber system. In addition to SO2, concentration of other gases such as oxygen and carbon dioxide can significantly affect the choice of a process. Selection of scrubbing processes and systems is described for two cases: TBRC™ Copper Smelting and Secondary Lead Smelting effluents.
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