To provide a method for regenerating an absorbing solution which is through with the absorption of an exhaust gas to be generated by an absorption device in an exhaust gas desulfurization process, in an environmentally beneficial and low cost way, by adding no chemical.
The exhaust gas desulfurization process desulfurizes the exhaust gas containing a sulfur oxide such as sulfur dioxide by absorption of the exhaust gas into the absorbing solution composed of sodium hydroxide as an absorbent. In this process, the absorbing solution including the absorbed exhaust gas, is directly fed into an intermediate chamber of an electrolytic device with three chambers such as a cathodic chamber formed of a cationic exchange membrane arranged opposite to a cathode, an anodic chamber formed of an anionic exchange membrane arranged opposite to an anode, between the cathode and the anode, and the intermediate chamber formed of the cationic exchange membrane and the anionic exchange membrane. Further, a solution containing sulfuric acid is recovered from the anodic chamber by electrolytic treatment, and the solution containing the sodium hydroxide generated in the cathodic chamber and an outlet solution of the intermediate chamber are mixed into a regenerated absorbing solution.
SHOJI NOBUYOSHI
MATSUMURA YUKIO
OGUMA OSAMU
| JPS50126579A | 1975-10-04 |
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu