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Reduction of Emissions of Sulphur and Chlorine from Combustion of High Volatile Waste Fuels (Sludge) in Fluidised Bed

Lars-Erik Åmand (Institutionen för energiteknik) ; Bo Leckner (Institutionen för energiteknik)
Proceedings of the 3rd International Conference on Combustion, Incineration/Pyrolysis and Emission Control (3rd i-CIPEC), October 21-23, 2004, Hangzhou, China p. 476-481. (2004)
[Konferensbidrag, refereegranskat]

Abstract: Co-combustion of sewage sludge with coal or wood as base fuels may cause high emissions of sulphur dioxide and hydrogen chlorine to the atmosphere. The conventional technique for sulphur capture in fluidised bed combustion using coal, lime addition, works well under co-combustion conditions with coal as base fuel but not with wood. The concentration of SO2 certainly plays a role, but phosphorous, originating from the sewage sludge, forms calcium phosphate that may interfere with the sulphur capture reactions normally taking place when lime is added to the bed. Lime addition to the fluidized bed during combustion of pulp&paper sludge, not containing phosphorous and with similar sulphur levels as for the sewage sludge, gives a normal sulphur capture. Adding hydrated lime to a bag filter is an alternative to lime addition to the bed that can be used when fuels with high content of phosphorous are co-combusted with wood. Hydrated lime also captures chlorine in the bag filter.

Nyckelord: Co-combustion, sewage sludge, sulphur capture, chlorine capture, phosphorous interference

The 3rd International Conference on Combustion, Incineration/Pyrolysis and Emission Control held in Hangzhou, China on October 21-23, 2004 was organized by the Zhejiang University in Hangzhou. The proceedings was edited by Kefa CEN, Jianhua Yan and Yong CHI.

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Denna post skapades 2006-08-28. Senast ändrad 2016-08-15.
CPL Pubid: 4655


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Institutionen för energiteknik (1970-2004)


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