OPERATION METHOD OF ELECTRIC DEIONIZATION DEVICE

• Main Author: HOTTA HITOSHI
• Format: Patent
• Language: English; Japanese
• Published: 31.10.2019
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

To provide an operation method of an electric deionization device in which power-saving operation of an electric deionization device according to water quality is possible and economical operation is possible.SOLUTION: An operation method of an electric deionization device comprises: measuring boron concentration of inflow water into an electric deionization device 9 by a boron monitor 15; and controlling current conducted to the electric deionization devices 9,11 based on the measurement value. When the boron concentration of the inflow water exceeds a reference value, the current is increased. When being lower than the reference value, the current is decreased. Boron concentration in treated water from the electric deionization device 11 is monitored by a boron monitor 16.SELECTED DRAWING: Figure 1 【課題】水質に応じた電気式脱イオン装置の節電運転が可能となり経済的な運転が可能となる電気脱イオン装置の運転方法を提供する。【解決手段】電気脱イオン装置９の流入水のホウ素濃度をホウ素モニター１５で測定し、この測定値に基づいて電気脱イオン装置９，１１に通電する電流を制御する電気脱イオン装置の運転方法において、流入水のホウ素濃度が基準値を超えた場合、前記電流を増加させ、基準値よりも低いときには前記電流を減少させることを特徴とする電気脱イオン装置の運転方法。電気脱イオン装置１１からの処理水中のホウ素濃度をホウ素モニター１６で監視する。【選択図】図１