NDLI: Post-combustion of carbon residues from biomass / RDF co-firing during dry ash removal

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Post-combustion of carbon residues from biomass / RDF co-firing during dry ash removal

Content Provider	Semantic Scholar
Author	Bassetti, Fulvio Coppola, Daniele Ricci, Daniele Senneca, Osvalda Carrea, Alberto
Copyright Year	2013
Abstract	In some countries, as in the EU, current regulations provide incentives to promote cofiring of biomass / RDF with coal. Both the co-firing of biomass and RDF (Refuse Derived Fuel) as well as the conversion to 100% biomass combustion are under technical and economical evaluation. Operators are looking for ways to improve plant performance and lower both the environmental and economic impact. The grinding and firing systems of the existing coal-fired plants are not designed for those co-fuels. Any deterioration of the combustion performance would reduce the power output and increase ash disposal costs by increased content of combustion residues. Moreover, operating problems may occur at existing wet ash removal systems because of changes in ash properties (e.g. floating on water surface). The application of air cooled ash removal, with simultaneous and controlled postcombustion of unburned residues on the conveyor belt, enlarges the furnace and maintains combustion efficiency even with different fuel qualities. In addition the plant efficiency can be increased through heat recovery. This new ash removal technology supports operators and plant manufacturers in their efforts to make conventional coal plants more flexible and more efficient. For example when co-firing biomass, grinding power can be reduced and combustion completed during ash removal on the conveyor. Combined ash removal and post-combustion systems are successfully operating at ENEL Fusina Power Plant #3 & 4 (2 x 320 MW) and RWE Gersteinwerk Power Plant #K (770 MW), each with RDF co-firing, and at Plzenska Teplarenska Power Plant #3 & 4 (2 x 60 MW) co-firing biomass and RDF. 2013 World of Coal Ash (WOCA) Conference April 22-25, 2013 in Lexington, KY http://www.flyash.info/
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.flyash.info/2013/049-Bassetti-2013.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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