EDI (electrodeionization) is an advanced ultrapure water production technology that combines the advantages of electrodialysis and ion exchange resins. It can consistently produce ultrapure water with a resistivity of up to 18.2 MΩ·cm. It offers significant advantages such as continuous operation, high automation, zero pollution, and low operating costs. EDI has become a key process for producing ultrapure water in industries such as electronics, power generation, pharmaceuticals, and chemicals.
EDI Device Introduction:
EDI (Electrodeionization) is a pure water production technology that combines ion exchange, ion exchange membrane, and ion electromigration. It cleverly combines electrodialysis and ion exchange technologies, utilizing high voltage across electrodes to move charged ions in water. Ion exchange resins and selective resin membranes accelerate ion migration and removal, achieving water purification.
Process flow chart
Working Principle of Ultrapure Water Equipment
Pretreatment: Removes suspended solids, particulates, and most soluble ions from water through filtration, sedimentation, and pH adjustment, preparing it for subsequent treatment.
Reverse Osmosis: Utilizes the properties of a semipermeable membrane to force water through it under pressure, trapping impurities such as dissolved salts, organic matter, and microorganisms, further removing contaminants from the water.
Electrodeionization: Uses an electric field to orderly migrate and remove ions from the water, further improving water purity.
Final Treatment: Typically includes ultraviolet disinfection and ozone treatment, aiming to remove microorganisms from the water and ensure the biosafety of ultrapure water.
Technical Features of Ultrapure Water Equipment
High-Efficiency Purification: Utilizing a combined RO+EDI+polishing mixed-bed process, it effectively removes dissolved salts, organic matter, colloids, and macromolecules from the raw water, reducing the ion content and achieving high-purity product water, providing ideal conditions for various chip manufacturing processes.
Aseptic Treatment: Ultraviolet disinfection technology is typically used to sterilize produced water, reducing the risk of microbial contamination and meeting the aseptic operation requirements of chip manufacturing.
High Level of Automation: Equipped with an intelligent control system, it monitors water quality, flow rate, and other parameters in real time and automatically adjusts operating conditions to ensure stable produced water quality. Furthermore, the equipment automatically shuts down in the event of a malfunction, providing automatic protection.
Compact Structure: The equipment's relatively compact design occupies a small footprint, saving space for businesses. It also offers low energy consumption and operating costs.
