To provide a method of removing calcium in a desulfurization liquid capable of removing calcium contained in the desulfurization liquid discharged from a desulfurization tower for desulfurizing a sintering machine exhaust gas without requiring a large installation cost.
A desulfurization liquid discharged from a desulfurization tower 1 is introduced into an aeration tank 27, and then the desulfurization liquid introduced into the aeration tank 27 is aerated with carbon dioxide of 40°C or lower. After calcium in the desulfurization liquid is made calcium carbonate, the calcium carbonate is precipitated on a bottom of the aeration tank 27. The calcium carbonate precipitated on the bottom of the aeration tank 27 is discharged from a slurry-liquid discharge pipe 29 to the outside of the aeration tank 27 to remove the calcium from the desulfurization liquid.
Megumi Konishi
Hide Tanaka Tetsu
Ichi Hirose
Toru Miyasaka
Next Patent: GARBAGE TREATMENT APPARATUS AND METHOD