DE-IONIZATION TREATMENT DEVICE AND METHOD FOR OPERATING DE-IONIZATION TREATMENT DEVICE
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Aug 3, 2012
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Aug 3, 2012
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A de-ionization treatment device includes a capacitive de-ionization treatment unit. In a de-ionization step before a regeneration step, the de-ionization treatment device injects a scale inhibiting agent into supplied water for a period of time that is deduced from a retained water amount of a de-ionization unit and a supplied water flow rate until a predetermined period of time passes or a predetermined ion concentration is reached. The de-ionization treatment device injects the scale inhibiting agent into supplied water at the time of stoppage of the capacitive de-ionization treatment unit until a predetermined period of time passes or a predetermined ion concentration is reached. Alternatively, at the time of stoppage of the capacitive de-ionization treatment unit, the de-ionization treatment device feeds a low ion concentration water in an amount based on the retained water amount of the de-ionization unit to the capacitive de-ionization treatment unit.
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