| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas desulfurization apparatus capable of improving efficiently and stably reactivity of lime stone, decreasing operational cost of a plant, and improving purification performance of the exhaust gas. <P>SOLUTION: The exhaust gas desulfurization apparatus 10 is characterized in that the apparatus includes: a desulfurization absorption tower 11 for removing SOx and dust in the exhaust gas 17; a spray pipe 12 equipped in the desulfurization absorption tower 11; an absorption liquid feeding means 13 for feeding an absorption liquid 21 including an absorption agent slurry comprising the lime stone as an absorbing agent into the desulfurization absorption tower 11; a nozzle 14 provided in the spray pipe 12 and spraying the absorption liquid 21 into the desulfurization absorption tower 11; an alkali agent feeding means 15 for feeding an alkali agent-containing solution 44 into the desulfurization absorption tower 11; and a discharge water discharging pipe 16 which after the absorption liquid 21 discharged from the desulfurization absorption tower 11 is separated by solid-liquid separation, the obtained filtrate 55 is discharged as a discharge water 58, and the amount of feeding of the alkali agent-containing solution 44 into the desulfurization absorption tower 11 is adjusted based on the amount of discharging of the discharge water 58. <P>COPYRIGHT: (C)2013,JPO&INPIT |
