Lime Filtration

The use of lime for treating flue gases is a proven technology. Flue gas is generated from the thermal treatment process in Energy from Waste plants (EfW) and contains acidic gases such as hydrogen chloride, sulphur dioxide and hydrogen fluoride. The use of lime in the three main flue gas treatment processes of; dry, semi-dry and wet processes shows its flexibility and adaptability in its worldwide application.

Calcium carbonate (chalk), calcium oxide (quicklime) or calcium hydroxide (hydrated lime) can be used to neutralise acidic gases and remove sulphur dioxide from both EfW plants and power stations. This ensures that plants comply with both local and European environmental legislation for air emissions. Together with the new flue gas treatment equipment technologies, lime is the most cost effective alkali that can be used for this kind of treatment, with less dosage and less waste production compared with other reagents.

"Lime products can therefore provide a cost effective, efficient solution to the treatment of flue gases generated from the energy recovery process, which reduces the waste volumes sent to landfill

The number of Energy from Waste plants in the UK is due to rise significantly in the near future, as the cost of landfilling waste is set to increase dramatically.


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