| 摘要 |
<p>PURPOSE:To reduce the amt. of an absorbent to be supplied by controlling a pH set value signal and an absorbent excess rate set value signal on the basis of a dry SOx gas amt. measuring signal calculated from a moisture planning signal, an exhaust gas flow rate detection signal, and an inlet SOx concn. detection signal. CONSTITUTION:The exhaust gas flow rate detection signal 17 is multiplied by the inlet SOx concn. detection signal by a multiplier 25 to calculate a wet SOx gas amt. detection signal 26, and the signal is multiplied by the moisture planning signal 48 corresponding to a load demand detection signal 46 by a multiplier 49 to calculate the dry SOx gas amt. measuring signal 50. Then an inlet and outlet concn. difference measuring signal 54 and a desulfurization efficiency measuring signal 54 are calculated by an inlet SOx concn. detection signal 24 and an outlet SOx concn. detection signal 52, a dry SOx amt. measuring signal 58 is calculated, a pH set value signal 28 is calculated therefor and compared with a pH detection signal 29 to calculate a pH deviation measuring signal 31 and an absorbent excess rate demand signal 37, finally a slurry flow rate deviation measuring signal 42 is obtained, and the signal is inputted to a controller 43 to control the amt. of the slurry to be supplied.</p> |
