DE-IONIZATION TREATMENT DEVICE AND METHOD FOR OPERATING DE-IONIZATION TREATMENT DEVICE

摘要

The purpose of the present invention is to reliably inhibit scale deposition in an electrostatic desalination treatment device. In a desalination step prior to a reclamation step, this desalination treatment device (1), which is provided with electrostatic desalination treatment units (10, 60), introduces a scale inhibitor into supply water at a time derived from the holding water quantity of a desalination unit (4) and the supply water flow rate, and stops introducing the scale inhibitor after a prescribed time has elapsed or after a prescribed ion concentration has been attained. This desalination treatment device (1) introduces the scale inhibitor into the supply water when one electrostatic desalination treatment unit (10) is suspended, and stops introducing the scale inhibitor after a prescribed time has elapsed or after a prescribed ion concentration has been attained. Otherwise, when both of the desalination units (30, 60) are suspended, this desalination treatment device (1) supplies, to the electrostatic desalination treatment units (30, 60), a quantity of water having a low ion concentration, said quantity being based on the holding water quantity of the desalination unit (4).