| 摘要 |
PURPOSE:To restrict carbon dioxide gas concentration of decarbonated water to be low, and elongate a regeneration cycle of ion exchange resin by holding recovered water in a water tank under a decarbonater to be constantly at a higher position than a water level of recovered water in a water tank under a water recovering tower. CONSTITUTION:A water level of recovered water 6B stored in a water tank 15B is held to be higher than a water level of recovered water 6 stored in a water tank 15A. Part of the decarbonated water 6B is supplied through a throttle 16 to the water tank 15A to be sent to a liquid-to-liquid cooler 21 with condensed water 6A to be recovered water to be cooled. Carbon dioxide gas in combustion waste gas 2G introduced from a combustion waste gas supply port 18 of a water recovering tower 11 is thus diluted by a mass quantity of the recovered water. Carbon dioxide gas concentration in the decarbonated water 6B to be supplied to an ion exchange type water processing device 8 is thus restricted to be low, thereby a regeneration cycle of ion exchange resin can be elongated. |
