| 摘要 |
PROBLEM TO BE SOLVED: To provide a zinc injection method capable of reducing consumption of carbon dioxide gas when preparing injection water containing zinc ions.SOLUTION: A zinc injection apparatus 1 including a zinc dissolution tank 2 of which the inside is separated into a zinc dissolution area 4 and a dissolved zinc storage area 5 by a partition member 3, a carbon dioxide gas dissolution tank 7 connected to the zinc dissolution area 4, and a carbon dioxide gas bubbling device having a diffusing pipe 13 installed in the carbon dioxide gas dissolution tank 7 and a carbon dioxide gas supply pipe 11 connected to the diffusing pipe 13 is used for the zinc injection method. Carbon dioxide gas supplied from the carbon dioxide gas supply pipe 11 is dissolved into water in the carbon dioxide gas dissolution tank 7 to generate a carbon dioxide solution having a predetermined pH value. The carbon dioxide solution is supplied to the zinc dissolution area 4 and zinc oxide pellets 24 loaded in the zinc dissolution area 4 is dissolved to generate a carbon dioxide solution containing zinc ions. The carbon dioxide solution containing the zinc ions is injected into the supply pipe 36 through the dissolved zinc storage area 5. |
