To provide a method for treating a hydrochloric acid waste liquid which efficiently neutralizes the hydrochloric acid waste liquid formed from hydrogen chloride gas generated when synthetic glass such as high-purity quartz glass or the like is produced to allow discharge outside, and its apparatus.
The apparatus for treating the hydrochloric acid waste liquid 8 which forms the hydrochloric acid waste liquid from the hydrogen chloride gas generated when a porous glass base material is produced to discharge by neutralizing the hydrochloric acid waste liquid 8 includes a neutralization tank 5 which feeds the hydrochloric acid waste liquid 8 to the bottom part side and neutralizes this with granular lime stone 9 deposited on the bottom part to form a neutralized waste liquid 8A; an agitation means which comprises a first air pipe V1 to a fourth air pipe V4, a first circulation pipe 51 and a fifth air pipe V5, and a second circulation pipe 52 and a sixth air pipe V6 that agitate the lime stone 9 in the neutralization tank 5; and a discharge port 71 to be a discharge means for discharging the neutralized waste liquid 8A from the upper side of the neutralization tank 5.
SAKUMA TAKUYA
KATO MASAYUKI
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu