| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for treating a flue gas coming from a combustion apparatus of an oxygen combustion type wherein nitrogen discharged from an oxygen production device constituting an oxygen combustion system is actively used to enhance the capability of removing SO<SB POS="POST">2</SB>present in the flue gas, and a wet-type method and apparatus for desulfurizing a flue gas for use therein. <P>SOLUTION: The wet type apparatus 3 and method for desulfurizing a flue gas include a desulfurization/absorption section 26 wherein combustion exhaust discharged from a boiler 13 of an oxygen combustion type that uses a gas of a high oxygen concentration obtained by separating nitrogen from oxygen as a gas for use in combustion, and introduced thereinto is brought into gas-liquid contact with slurry comprising a desulfurizing agent; an absorption liquid storage section 11 disposed in the lower part of the desulfurization/absorption section 26, wherein the desulfurizing absorption liquid having been brought into gas-liquid contact with the combustion exhaust is briefly stored to oxidize sulfites present in the desulfurizing absorption liquid by feeding oxidation air thereinto; and a cooling means 31 of cooling the desulfurizing absorption liquid, wherein the nitrogen separated from air is used as a coolant. The apparatus and the method for treating a flue gas coming from a boiler of an oxygen combustion type, employ the above apparatus and method respectively. <P>COPYRIGHT: (C)2012,JPO&INPIT |
