Optimization by air staging of the fluidized bed combustion of tyre derived fuel (Contributo in atti di convegno)

Type
Label
  • Optimization by air staging of the fluidized bed combustion of tyre derived fuel (Contributo in atti di convegno) (literal)
Anno
  • 1997-01-01T00:00:00+01:00 (literal)
Alternative label
  • P. Salatino, F. Scala, R. Chirone, P. Pollesel (1997)
    Optimization by air staging of the fluidized bed combustion of tyre derived fuel
    in Proc. of 4th Int. Conf. on Technologies and Combustion for a Clean Environment, Lisbon, Portugal
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • P. Salatino, F. Scala, R. Chirone, P. Pollesel (literal)
Pagina inizio
  • 23 (literal)
Pagina fine
  • 27 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Ingegneria Chimica - Università Federico II di Napoli Istituto di Ricerche sulla Combustione - CNR Eniricerche S.p.A. (literal)
Titolo
  • Optimization by air staging of the fluidized bed combustion of tyre derived fuel (literal)
Abstract
  • The combustion of tyre derived fuel (TDF) in a bubbling fluidized bed reactor is analyzed in the framework of the combustion-comminution-elutriation network recently proposed to follow the fate of fixed carbon in the fluidized bed combustion of fossil and non-fossil solid fuels (Arena et al., 1996b). The network emphasizes the relevance of the generation of carbon fines by primary fragmentation of TDF particles to the fate of fixed carbon fed to the reactor. The rates of carbon fines elutriation during the fluidized bed combustion of TDF have been measured by means of batch experiments in a bench scale reactor. The influence of gas superficial velocity and of oxygen partial pressure on carbon elutriation rates have been characterized. Results demonstrate that both variables exert influence upon the overall fixed carbon combustion efficiency. Results of batch experiments are further analyzed by comparing the relative rates of the series-parallel pathways to char conversion: fines generation by comminution of the parent fuel; char elutriation; carbon fines postcombustion over their residence time in the reactor. This analysis is the starting point for outlining an optimal strategy, based on the staging of combustion air into a primary and a secondary stream, for the maximization of combustion efficiency and the limitation of pollutants emission. The effectiveness of the proposed strategy is confirmed by separate fluidized bed combustion experiments. These consist in the steady combustion of TDF feeds in a combustor operated continuously using different secondary to primary air ratios. Results of experiments and criteria for optimal operation of fluidized combustors with this fuel are presented and discussed. (literal)
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