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Flue Gas Desulphurisation

Lodge Cottrell are able to supply a wide variety of Flue Gas Desulphurisation (FGD) technologies and select the one that best meets our customers requirements. These FGD systems include wet applications using:

  • hydrated lime, which is the most commonly used technique that often produces commercial-grade gypsum as a by-product. The SOx removal efficiency using this reagent is the greatest of all techniques with typical removal rates of 95%.
  • magnesium hydroxide, is also commonly used where this reagent is more readily available and lower removal efficiencies, around 75%, are acceptable.
  • alkali wastewater, continuing magnesium and/or sodium ions, if available can be used as a cost-effective FGD reagent.  
  • Seawater is the least costly FGD process to operate, due to the freely available reagent, but environmental, geographical and climatic conditions mean that few of these FGD systems have been built throughout the world.