| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a wet flue gas desulfurization method for a lime-gypsum process which can reduce equipments and power expenses without lowering desulfurization efficiency and makes an absorption column small in size and high in performance. SOLUTION: In a desulfurization method, an absorption column main body 1 is composed of a gas-liquid contact area A equipped with a liquid spray means 4 for spraying an liquid absorbent 6, a liquid retention area B which is equipped with a gas dispersing means 7 for spouting air 16 into the absorbent 6 and recovers the sprayed absorbent 6, and a liquid circulating line 10 which supplies the absorbent 6 in the area B continuously to the spray means 4, and exhaust gas 15 containing sulfur oxide is introduced into the column main body 1 and gas-liquid-contacted with the absorbent 6 containing calcium type absorbent so that the sulfur oxide in the exhaust gas 15 is absorbed by the absorbent 6. In addition, air 16 and calcium carbonate 17 are supplied into the absorbent 6 to produce gypsum 18. The absorbent 6 of the area A is sprayed upward, and the exhaust gas introduced into the column main body 1 is made to flow from the bottom to the top.</p> |
