| 摘要 |
<p>PROBLEM TO BE SOLVED: To secure water supply and downsize the reheater by arranging the undercooler which generates condensate by cooling an exhaust gas, a storage part which recovers the condensate and a circulating device which makes the reflux of the condensate as the water supply to a wet flue gas desulfurizing device, on the outlet side thereof. SOLUTION: Exhaust gas discharged from a coal-burning boiler has its heat recovered by the heat recovering device 3 of a gas gas heater 2 and also has a sulfur oxide removed by bringing the gas in contact with an absorbing liquid 8 by a wet flue gas desulfurizing device 1. Further, mist is recovered from the exhaust gas by means of a mist eliminator and is cooled by an undercooler 16. In this case, generated condensate 17 is recovered into a storage part 18 and is partially made to flow back as water supply to the adsorbing tower 11 of the wet flue gas desulfurizing device 1 through a line 22 with the help of a circulating device 19. Next the exhaust gas cooled by the undercooler 16 is reheated using the reheater 4 of the gas gas heater 2 and discharged from a smokestack 15. That is, the condensate is recovered from the exhaust gas to secure the water supply and the miniaturization of the reheater 4 is achieved.</p> |
