Water treatment system provided with electric deionized water production device and method for operating same

The water treatment system with EDI device uses circulation lines and quality-based flow adjustment to stabilize water quality and enhance recovery rates, addressing fluctuations and operational instability in EDI devices.

WO2026048393A1 Publication Date: 2026-03-05ORGANO CORP
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Patent Information

Application Number
PCT/JP2025/027053
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-09-02
Filing Date
2025-07-30
Publication Date
2026-03-05

AI Technical Summary

Technical Problem

Existing water treatment systems with EDI devices face challenges in maintaining stable water quality and high recovery rates due to fluctuations in water quality and the need to discharge concentrated water, which can lead to increased ionic load and operational instability.

Method used

A water treatment system with an EDI device that includes circulation lines for treated and concentrated water, adjustment means for distributing water flow based on quality monitoring, and a control unit to manage the distribution ratios, ensuring stable water quality and high recovery rates even with fluctuating water quality.

Benefits of technology

The system achieves stable treated water quality and increased water recovery rates by dynamically adjusting the distribution of treated and concentrated water based on real-time quality monitoring, reducing fluctuations and maintaining efficient operation.

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Abstract

This water treatment system provided with an EDI device comprises: a circulation pipe 36 that circulates treated water (deionized water) from an EDI device 10 to a preceding stage of the EDI device 10; a water supply pipe 35 that supplies the treated water toward a use point; a flow rate adjustment unit 34 that distributes the treated water to the circulation pipe 36 and the water supply pipe 35; a circulation pipe 44 that circulates concentrated water from the EDI device 10 to the preceding stage of the EDI device 10; a discharge pipe 43 that discharges the concentrated water to the outside of the system; a flow rate adjustment unit 42 that distributes the concentrated water to the circulation pipe 44 and the discharge pipe 43; and water quality monitoring devices 51 to 54 that monitor the water quality within the water treatment system from the EDI device 10. At least one of the flow rate adjustment units 34, 42 is controlled on the basis of a monitoring result from at least one of the water quality monitoring devices 51 to 54.
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