A Bubbling Fluidized Bed Combustion System for Forest Residues

Anthony Goncalves
t3e Industrial research chair, École de technologie supårieure, Montråal, Canada \ GRIPS, Universitå du Quåbec à Chicoutimi, Chicoutimi, Canada

Laszlo Kiss
GRIPS, Universitå du Quåbec à Chicoutimi, Chicoutimi, Canada

Marie-Isabelle Farinas
GRIPS, Universitå du Quåbec à Chicoutimi, Chicoutimi, Canada

Daniel Rousse
t3e Industrial research chair, École de technologie supårieure, Montråal, Canada

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp11057117

Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:16, s. 117-124

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Publicerad: 2011-11-03

ISBN: 978-91-7393-070-3

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


The main objective of the project was to develop or adapt a combustion technology that would permit a stable operation of a boiler fed with a combustible with a high level (50%) of humidity. The size of the unit was determined by the heating demand of a lacto-serum plant. Computer simulations and small scale laboratory experiments were used to design a fluidized bed; then fluid flow and heat transfer calculations were carried out to verifiy the heat balance (or energy balance) of an existing fixed boiler to be converted into à fluidized bed one. A grid involving 130 nozzles with 6 equally distributed holes (10 mm) was designed. The intake has a 23.37 mm I.D. It has been in operation for more than a year now and operation results are presented. It was found that the key aspect of the combustion process in such boilers is the homogeneity of the fluidized bed and the temperature control. We are now working on a way to broaden the range of type of wood and humidity levels.


Renewable energy source; Boiler; Bubbling fluidized bed


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