| 摘要 |
PURPOSE:To contrive not to repeat feeding and extracting fluidized medium more than necessary, by changing a target value of SOx in accordance with the change in temperature in a combustion part by the titled controlling device. CONSTITUTION:Calculation is performed in a medium feeding rate calculating circuit 9 on the basis of a SOx setting value and a found value measured by a SOx meter 6 for exhaust gas, and an output is given both to a fluidized medium feeding rate controller 7 and a fluidized medium extractor 4, respectively. Bebause the eliminating rate of SOx is high when the temperature in a fluidized bed is below T1, the generating rate of SOx in exhaust gas is kept in a low value in comparison with the value of SOx regulated by law, so that the target value to control SOx can be reduced to low value. On the other hand, when the temperature in the fluidized bed is above T1 and below T2, the eliminating rate of SOx tends to be lowered, so that the target value (b) to control SOx is corrected in a setting value correcting circuit 8 within the range below the value of SOx regulated under law, based on the temperature measured by a thermometer 5 provided to the fluidized bed part. |
