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A theoretical study on the performance of steady state bubbling
fluidized bed burners is presented using a simple mathematical model. The
proposed model has pedagogical and practical advantages due to its simplicity.
The calculations, whose results are plotted in several graphics, were based on
data obtained in laboratory scale experiments. The experiments were carried out
with wood chars and the model allows a proper evaluation of physical and
chemical phenomena taking place inside the reactor, as well as a fast approach
to the pre-design phase, before going towards more complex and time consuming
numerical modeling. In the first part of the paper the steady state modeling is
compared with the combustion of successive batches of char particles.
Afterwards, the performance of a 1 m
diameter bed operating from 700℃ to 800℃ is shown.