| 摘要 |
<p>PURPOSE:To maintain a stable combustion state and besides to suppress the production of a noxious gas as low as possible, by correcting the flow rate of a fuel supplied to a fluidized bed or the time changing rate thereof depending upon the temperature of fluidized bed. CONSTITUTION:The temperature of a fluidized bed 2 is detected by a detector 17 to input it to a correction computing circuit 11. The correction computing circuit 11 corrects a signal, representing the flow rate of a fuel to be supplied so that a steam pressure detected by a detector 7 is maintained at a value set by a set circuit 8, so as to suppress an SOX concentration depending upon the temperature of the fluidized bed 2. The fuel condition and the SOX concentration in a fluidized bed boiler 1 fluctuate also according to the time changing rate of the flow rate of a fuel supplied by a combustion feed means 4, and thereby the time changing rate of the flow rate of the fuel shown by a command signal outputted to a line 10 from a boiler master control circuit 9 is restricted depending on the temperature of the fluidized bed 2.</p> |
