Comminution phenomena during the fluidized bed combustion of a commercial refuse-derived fuel

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:287954

Arena, U ^[1]; Cammarota, A; Chirone, R; D`Anna, G ^[2]

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1. Univ. of Perugia (Italy). Ist. di Energetica
2. National Research Council, Naples (Italy). Ist. di Ricerche sulla Combustione

A commercial densified refuse-derived fuel (RDF), obtained as pellets from municipal solid wastes, was burned in two laboratory scale bubbling fluidized bed combustors, having an internal diameter of 41 mm. The apparatus were both batchwise operated at 850 C by injecting batches of RDF particles into a bed of silica sand (300--400 {micro}m as size range) fluidized at a superficial gas velocity of 0.8 m/s. RDF particles with equivalent mean diameter ranging from 4 to 9 mm were used. Different experimental procedures were set up to separately investigate comminution phenomena of fuel particles. Results were compared with those obtained burning a South African bituminous coal. Results pointed out that RDF particles undergo a strong primary fragmentation phenomenon, with a probability of particle breakage equal to 1 for fuel particles larger than 6 mm. Attrition and char fragmentation phenomena are particularly relevant under both inert and oxidizing conditions, generating a large amount of unburned fines which may affect overall combustion efficiency.

• OSTI ID: 287954
• Report Number(s): CONF-950522--; ISBN 0-7918-1305-3
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
BITUMINOUS COAL
CHARS
COMMINUTION
COMPARATIVE EVALUATIONS
DESIGN
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
MUNICIPAL WASTES
PARTICLE SIZE
REFUSE DERIVED FUELS
THERMAL EFFICIENCY