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Wet-limestone scrubbing fundamentals
The important concepts of wet-limestone scrubbing such as scale control, good reagent utilization and corrosion prevention are presented. Stricter environmental regulations are forcing many utilities to install flue gas desulfurization (FGD) systems to control sulfur dioxide emissions with the application of wet-limestone scrubbing. Calcium sulfite-sulfate hemihydrate is formed during the reaction which is a soft and difficult to dewater material. Scrubbers are equipped with forced-air oxidation systems to introduce additional oxygen to the scrubber slurry. A properly designed oxidation system will convert all of the liquid sulfite and bisulfite ions to sulfate ions. Limestone with 94 percent or greater calcium carbonate content provide suitable alkalinity for reaction and impurities may cause severe operational difficulties. Magnesium a common substitute for calcium can be either helpful or harmful depending upon its chemical makeup within the stone.
Wet-limestone scrubbing fundamentals
The important concepts of wet-limestone scrubbing such as scale control, good reagent utilization and corrosion prevention are presented. Stricter environmental regulations are forcing many utilities to install flue gas desulfurization (FGD) systems to control sulfur dioxide emissions with the application of wet-limestone scrubbing. Calcium sulfite-sulfate hemihydrate is formed during the reaction which is a soft and difficult to dewater material. Scrubbers are equipped with forced-air oxidation systems to introduce additional oxygen to the scrubber slurry. A properly designed oxidation system will convert all of the liquid sulfite and bisulfite ions to sulfate ions. Limestone with 94 percent or greater calcium carbonate content provide suitable alkalinity for reaction and impurities may cause severe operational difficulties. Magnesium a common substitute for calcium can be either helpful or harmful depending upon its chemical makeup within the stone.
Wet-limestone scrubbing fundamentals
2006
6 Seiten, 3 Quellen
Article (Journal)
English
| European Patent Office | 2021