A particulate model of solid waste incineration in a fluidized bed combining combustion and heavy metal vaporization

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2009.04.003· OSTI ID:21235976

Mazza, G ^[1]; Falcoz, Q; Gauthier, D; Flamant, G ^[2]

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1. Facultad de Ingenieria, Departamento de Quimica, Universidad Nacional del Comahue, UE Neuquen (CONICET - UNCo), Buenos Aires 1400, 8300 Neuquen (Argentina)
2. Laboratoire Procedes Materiaux et Energie Solaire (CNRS-PROMES), 7 Rue du Four Solaire, Odeillo, 66120 Font-Romeu (France)

This study aims to develop a particulate model combining solid waste particle combustion and heavy metal vaporization from burning particles during MSW incineration in a fluidized bed. The original approach for this model combines an asymptotic combustion model for the carbonaceous solid combustion and a shrinking core model to describe the heavy metal vaporization. A parametric study is presented. The global metal vaporization process is strongly influenced by temperature. Internal mass transfer controls the metal vaporization rate at low temperatures. At high temperatures, the chemical reactions associated with particle combustion control the metal vaporization rate. A comparison between the simulation results and experimental data obtained with a laboratory-scale fluid bed incinerator and Cd-spiked particles shows that the heavy metal vaporization is correctly predicted by the model. The predictions are better at higher temperatures because of the temperature gradient inside the particle. Future development of the model will take this into account. (author)

• OSTI ID: 21235976
• Journal Information: Combustion and Flame, Vol. 156, Issue 11; Other Information: Elsevier Ltd. All rights reserved; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
HEAVY METALS
COMBUSTION
EVAPORATION
SOLID WASTES
FLUIDIZED BEDS
COMBUSTION CONTROL
TEMPERATURE DEPENDENCE
PARTICULATES
TEMPERATURE RANGE 1000-4000 K
TEMPERATURE RANGE 0400-1000 K
MASS TRANSFER
PARAMETRIC ANALYSIS
MATHEMATICAL MODELS
TEMPERATURE GRADIENTS
INCINERATORS
COMPUTERIZED SIMULATION
MUNICIPAL WASTES