| 摘要 |
<p>PURPOSE:To prevent a device structure material from corroding by adding a given inhibitor to absorbing solution or cooling dusting solution in a low drain type or sea water type wet exhaust gas desulfurizer. CONSTITUTION:One kind or more of cyclohexylamine, pyridine or benzothiazole are stored in an inhibitor feeding tank 17. When SOx in exhaust gas guided from a boiler 15 to an absorption column 1 in the wet desulfurizing treatment reacts with limestone slurry and recovered as gypsum, the concentration of Cl<-> and F<-> in the absorbing solution get higher gradually. Corrosion speed, however, can be controlled under the tolerance limit by controlling the inhibitor volume contain in the absorbing solution to 0.1% or more by means of an inhibitor introduced into an absorption column inlet 18 and an absorption column tank 6, and sea water as replenishing water and SUS316L steel or the like as a structural material can be used respectively.</p> |
