| 摘要 |
PURPOSE:To automatically detect and judge the alteration of physical or chemical properties of an ion-exchange resin by installing a judging means to judge the abnormality of the ion-exchange resin when the difference between the reference height development flow speed at the time of back wash and the initial reference height development flow speed by comparison becomes larger than a previously set value. CONSTITUTION:In the case that ion-exchange resins 1A, 1B packed in an ion- exchange resin tower 1 are back washed by upward flow and developed, their reference height development flow speed becomes different from the initial reference height development flow speed if the physical or chemical properties of the ion-exchange resins 1A, 1B alter. Consequently, whether alteration of physical or chemical properties of the ion-exchange resins 1A, 1B occurs or not and the time to change or suppliment them can be known by measuring the reference height development flow speed of the ion-exchange resins 1A, 1B packed in the ion-exchange resin tower 1, obtaining the difference between the obtained speed and the initial reference height development flow speed, and comparing the difference with a previously set allowable value. |
