engleski

Modelling of the Spray Absorption for Wet Flue Gas Desulfurisation

Stricter regulations for the allowed sulfur dioxide emissions and the increased public concern about the environment drive the research of the new technologies that will reduce the negative impact of industry, transport and power sector. Using seawater as the scrubbing agent is attractive for marine and coastal applications because of vast supply and the increased absorption potential due to alkalinity. Absorption is a complex phenomenon that includes physical mass transfer from flue gases into the spray droplets and liquid wall film in a turbulent fluid flow, with the chemical reactions of sulfur dioxide and alkalinity in the aqueous phase. A numerical model for simulating the absorption process in seawater spray scrubbers has been developed and implemented in the computational fluid dynamics framework and applied for modelling on a real industrial scrubber. It replicated high removal efficiencies over 90% by simulating the large- scale scrubber with real industrial parameters. Model results and validation indicate that it can be used as a tool for designing more sustainable equipment for flue gas removal.

flue gas desulfurization ; sulfur dioxide – water chemistry ; mass transfer coefficient ; penetration theory ; film theory

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