Pure water production equipment
JP2026111057APending Publication Date: 2026-07-03KURITA WATER INDUSTRIES LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KURITA WATER INDUSTRIES LTD
- Filing Date
- 2024-12-23
- Publication Date
- 2026-07-03
AI Technical Summary
Technical Problem
Existing pure water production systems face inefficiencies in removing weak acid ions like boron and silica, leading to increased chemical and electrical consumption, and water dissociation issues at membrane junctions.
Method used
A pure water production apparatus with an electrodeionizer downstream of a desalination means, utilizing a desalination chamber filled with an anion exchanger, partitioned by a thin, homogeneous cation exchange membrane, enhances the removal of anionic components without chemicals.
Benefits of technology
Improves the removal rate of weak acid ions such as boron and silica by increasing anion exchange resin regeneration efficiency and reducing power consumption.
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Smart Images
Figure 2026111057000001_ABST
Abstract
To provide a pure water production apparatus capable of improving the removal efficiency of weak acid ions such as boron and silica without using chemicals. [Solution] The pure water production apparatus comprises a reverse osmosis membrane and an electrodeionizer 2. The electrodeionizer 2 alternately arranges anion exchange membranes 11 and cation exchange membranes 12 between an anode plate 15 and a cathode plate 16, and by forming compartments with these anion exchange membranes 11 and cation exchange membranes 12, a desalination chamber 13 and a concentration chamber 14 are formed, and an anode chamber and a cathode chamber are formed at both ends. Permeate W1 from the reverse osmosis membrane apparatus 1 is supplied to the desalination chamber 13 as the water supply to obtain treated water W2. Permeate from the reverse osmosis membrane apparatus 1 is supplied as the water supply W3 to the concentration chamber 14, and concentrated water W4 is discharged. In this electrodeionizer 2, the desalination chamber 13 is filled with substantially 100% by weight of anion exchange resin.
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