Fives Solios proposes
a seawater treatment system downstream GTCs for SO2 removal to fulfill stringent environmental regulation on high capacity smelters.
SO2 emissions at an aluminium smelter origin mainly from the coke material used to make the carbon anodes. The sulfur content varies typically from 1 to 3,5%. Since the aluminium production capacity increases, the availability and cost of low-sulphur coke could be affected. To meet new environmental regulations, smelters can opt for SO2 scrubbing technologies.
Solios Environnement offers seawater treatment systems: blow down water from the absorber is mixed with either fresh seawater or with plant cooling water to raise the pH of the solution back to approximately 6.5. If needed, the sulfite ions can be oxidized into less harmful sulfates by aeration of the water using air blowers and aerators.
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Main features
Concrete or synthetic material construction
Simple: one through process, no waste
Use natural alkalinity of sea water
High efficiency 90 - 95% |
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In case no sea water is available, Fives Solios proposes also Alkali scrubbers using soda ashes or sodium hydroxide.