STEAM CONDENSATE DESALTING DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent water from becoming qualitatively deteriorated and thereby enhance the efficiency of using an anionic exchange resin by packing a particulate cationic exchange resin and a particulate anionic exchange resin, both of which has an almost equal specific gravity and a particulate cationic exchange resin with a smaller specific gravity than that of the former in a steam condensate desalting tower. SOLUTION: This steam condensate desalting tower 120 is filled with an upper layer ion exchange resin 121 and a lower layer ion exchange resin 122. The upper layer ion exchange resin 121 is formed of a cationic exchange resin. The lower layer ion exchange resin 122 is formed of a uniform mixture of cationic exchange resin and anionic exchange resin which have a larger specific gravity than the upper layer ion exchange resin 121 and an equal specific gravity. The upper layer ion exchange resin 121 takes up main cationic impurities, and the lower layer ion exchange resin removes some leaking from the cationic impurities and a trace of anionic impurities. In addition, it is possible to use the resins for a long time by utilizing an inert gas such as nitrogen originating from an air pipe 38 at the time of back wash.