| 摘要 |
<p>PURPOSE:To provide a pH control device for a wet flue gas desulfurization plant. CONSTITUTION:In a desulfurization plant where gaseous SO2 containing gas to be treated is introduced into an absorber 1 and comes into contact with a liq. absorbent 5 containing an adsorbent and circulating through the absorber 1 to desulfurize it, a pH detector 17 for detecting pH of the fallen liquid in the absorber 1, a pH controller 14 for letting the outlet signal from the pH detector 17 be the controlled variable, and a control valve 10 installed in absorbent supplying piping 11 to the absorber 1 and operated by the output signal from the pH controller 14 are provided to constitute a pH control device for a wet gas desulfurization plant.</p> |
