
664 Oxygen-Enhanced Combustion
pass from the combustor through a transition section
into a cyclone and down through the return leg to reen-
ter the combustor directly above the bottom bed section.
Four stock ceramic-insulated band heaters surround the
bottom section of the combustor to help achieve appro-
priate combustion temperatures quickly. These heaters
are computer-controlled and, if necessary, can be run
during operation to help maintain isothermal condi-
tions in the dense bed zone. Solid feed rates of up to
15 kg/h can be maintained. Bed temperature is in the
range of 750°C–950°C. Supercial gas velocity is up to
8 m/s. The mini-CFBC has ...