| 摘要 |
PURPOSE:To efficiently neutralize a high-concn. alkali soln. by subjecting the high-concn. alkali soln. to primary pH regulation by strong acid and then subjecting this alkali soln. to secondary pH regulation by gaseous CO2. CONSTITUTION:A high-concn. alkali soln. of about 12.5pH is sent through a fluid supply pipe 2 at the prescribed pressure by a pump 3 and sulfuric acid or hydrochloric acid is fed from a tank 5 and these are uniformly stirred and mixed in a reaction mixer 4a incorporated in the line of the fluid supply pipe 2. Then while feeding gaseous carbon dioxide to this primary treatment water, the mixture is sent to the second reaction mixer 4b incorporated in the line of the fluid supply pipe 2b of the downstream side, restirred and mixed and subjected to secondary treatment at about 7pH. Thereby the control of pH is facilitated and clogging or the like can be solved.
|
