| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an air supply amount control method for oxidation of a wet-type flue gas desulfurization apparatus which is suitable for properly controlling air supply amount for oxidation in a short time without needing considerable remodeling of an air supply amount control system for oxidation when the gas property and/or the absorption liquid property at an absorption tower inlet is significantly changed. <P>SOLUTION: When the gas property and/or the absorption liquid property at an absorption tower inlet of a wet-type flue gas desulfurization apparatus 30 in which ORP of an absorption liquid is measured and air amount for oxidation to be supplied to an absorption tower is controlled is significantly changed, in place of a control method for the air amount for oxidation to be supplied to an absorption tower 38 as a control method by ORP of the absorption liquid, a relation of the sulfur oxide concentration at the absorption tower inlet and a flue gas amount with the needed air amount for oxidation or of the sulfur oxide concentration at the absorption tower inlet and a boiler load with the needed air amount for oxidation is determined; the needed air amount for oxidation is calculated from the sulfur oxide concentration at the absorption tower inlet and a flue gas amount or from the sulfur oxide concentration at the absorption tower inlet and a boiler load; and the calculated needed air amount for oxidation is controlled as air amount for oxidation to be supplied to the absorption tower. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
