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Help CenterDI Pure Water Equipment for Industrial High Purity Water Production.
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I. Overview of High-Purity Water Production Equipment:
Electrodeionisation (EDI), also known as continuous electrodialysis deionisation technology, serves as an advanced replacement for conventional mixed-bed ion exchange processes. This technology scientifically integrates electrodialysis and ion exchange techniques. Through the selective permeation of anions and cations via anion and cation exchange membranes, coupled with the ion exchange action of resin on waterborne ions, under the influence of an electric field, enabling the directed migration of ions within the water. This achieves deep purification and desalination. Simultaneously, hydrogen ions and hydroxide ions generated through water electrolysis continuously regenerate the resin bed. Consequently, the EDI water production process requires no acid or alkali chemical regeneration, enabling continuous production of high-quality ultrapure water. It offers the advantages of advanced technology, compact structure, and straightforward operation, representing a green revolution in water treatment technology. This novel technology can replace conventional ion exchange systems to produce ultrapure water with resistivity reaching 16-18 MΩ·cm. It ingeniously combines electrodialysis and ion exchange techniques, utilising the movement of charged ions in the water between electrodes. This is complemented by ion exchange resins and selective resin membranes to accelerate ion removal, thereby achieving water purification.
Historical Development of EDI Ultra-Pure Water Equipment Stage One: Pre-treatment filter → Cation bed → Anion bed → Mixed bed Stage Two: Pre-treatment filter → Reverse osmosis → Mixed bed Current Stage: Pre-treatment filter → Reverse osmosis → EDI (No acids or alkalis required) For several decades, mixed-bed ion exchange technology (D) has served as the standard process for producing ultrapure water. However, its requirement for periodic regeneration—consuming substantial quantities of chemicals (acids and alkalis) and industrial-grade water while causing environmental concerns—has necessitated the development of acid-alkali-free ultrapure water systems.
Precisely because conventional ion exchange increasingly fails to meet modern industrial and environmental demands, EDI technology—combining membranes, resins, and electrochemical principles—has revolutionised water treatment. Its ion exchange resins utilise electrical energy for regeneration, eliminating the need for acids and alkalis, thereby better fulfilling contemporary environmental requirements.
II. Advantages of High-Purity Water Production Equipment:
1. Stable output water quality.
2. Continuous production of ultra-pure water meeting user specifications.
3. Modular design with PLC-based fully automated control.
4. No acid/alkali regeneration required; zero wastewater discharge.
5. No production downtime due to regeneration cycles.
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