| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas treatment device which can achieve the same rate of elimination of sulfur dioxide as when air is combusted, without changing the size of a desulfurization device, even when the moisture content of an exhaust gas like an oxygen combustion exhaust gas, is high. <P>SOLUTION: The exhaust gas treatment device of a coal-fired boiler 1 of an oxygen combustion type is of the following functional construction: An absorbing solution cooler 23 is arranged in an absorbing solution inside the desulfurization device 5 which can eliminate a sulfur oxide content of the exhaust gas by atomizing the absorbing solution into the exhaust gas. Further, the desulfurization absorbing solution is set to not higher than 50°C, and then, a part of the exhaust gas present on the forward flow side or the rear flow side of the desulfurization device 5 is circulated to the combustion part of the boiler 1 through a circulation line 8, and used for fuel combustion. <P>COPYRIGHT: (C)2010,JPO&INPIT |
