| 摘要 |
<p>PURPOSE:To determine the supply of an absorbent in consideration of the variations of pH and to secure stabilized desulfurization performance by setting a fuzzy computing element for correcting the supply demand of the absorbent using fuzzy inference. CONSTITUTION:The fuzzy computing element 20 is actuated to determine the pH correcting supply demand using the deviation signal between the value measured by a pH meter 3 and the command and the fuzzy inference by the rate of change of the deviation signal. Consequently, when the quasi-whole amt. is oxidized, the pH is decreased below the command even by increasing the pH correcting supply demand. However, the pH correcting supply demand of the absorbent is further increased in this case by the output signal of the computing element 20, the process is repeated until the pH reaches the target value, and hence the pH is kept close to the target value and not greatly deviated from the target value.</p> |
