
659Oxy-Fuel Fluidized Bed Combustion
windows indicates a change of measurement point of
gas analyzer to the inlet gas stream from the ue-gas
stream (Channel I). After a change of channel, the ana-
lyzer used to enter in calibration stage because the break-
through of both points composition is too high, and it
checks if a problem occurs. A peak of CO is observed
when the change to RFG mode occurs. This is due to the
slow change of working regime of the fans, compared to
the combustion process itself. Figure 28.9 also shows the
ratio of feeding CO
2
from bottles that is registered by
the gas-lung. In this case, CO
2
from bottles was reduced
by m ...