In order to map all parameters
mentioned above in the mass balance model, the circulating fluidized bed furnace
chamber is considered for two flow regimes separately. This is due to
different particle behavior in the circulating fluidized bed system since there are differences
in the gas-solids flow structure between a dense zone at the bottom bed
and a dilute zone above the fuel feeding systemand secondary air inlets
and a dilute zone above the fuel feeding systemand secondary air inlets.
The particles transport between furnace chamber and return leg is
also taken into account in the mass balance model [16–20]. Basically,
the separation efficiency of solids separators is important for proper operation
of CFB boilers and plays a significant role in the prediction of the
particle size distribution. It is especially important when the loss of circulating
material is too high and fuel with low content of ash is fired.
Therefore, there is a necessity to recirculate ashes (i.e. fly ash or bottom
ash) to the furnace chamber as a newbed material. As a result, it allows
to keep mass of solids in the bed inventory. A comprehensive study of
the operating parameters with respect to the separation behavior of
the cyclone is precisely described by