What are the functions of electrodeionization machine?

Electrodeionization machine uses an electric field to regenerate resin online without the need for chemicals, producing high-purity water efficiently and environmentally friendly.

High-purity water is an indispensable resource in industrial production, the medical industry, and high-tech research and development (e.g., semiconductors and chips). Whether it’s the precision manufacturing of electronic chips, aseptic production in the pharmaceutical industry, or the safe operation of power boilers, highly pure water is essential.

The role of electrodeionization machine

High-purity water requires not only the removal of suspended solids and organic matter, but also the deep removal of anions and cations. Electrodeionization machine combines ion exchange and electrodialysis technologies, using a two-stage reverse osmosis system plus electrodialysis (EDI) to treat raw water and produce high-purity water.

Core role

The core function of EDI machine is to deeply remove ionic impurities from water, producing high-purity or even ultrapure water. Traditional ion exchange resins can remove these impurities. But they require regular chemical regeneration. This not only increases costs in the long term, but also hinders the use of acidic and alkaline chemicals.

With the advancement of technology, EDI machine is now filled with ion exchange resins. Under the action of an electric field, ions in the water migrate to the concentrate chamber through the dual action of resin adsorption and membrane separation, effectively desalinating the water. Furthermore, the resin decomposes water molecules to produce hydrogen and hydroxide ions, enabling online regeneration of the resin and maintaining its adsorption activity without the need for chemical agents.

This “adsorption-migration-regeneration” cycle enables EDI machine to continuously and stably produce ultrapure water with a resistivity of up to 15-18 MΩ·cm, meeting the stringent water purity requirements in diverse environments.

Other effects

In addition to its core deep desalination capabilities, electrodeionization machine also offers the added benefits of environmental protection, energy saving, stable operation, and ease of use.
① Environmentally friendly: it eliminates the generation of acidic and alkaline wastewater at the source, reducing environmental pollution.
② Energy consumption: Its operation consumes only electricity, significantly reducing energy consumption compared to the “regeneration-flushing” process of traditional ion exchange technology, resulting in superior long-term operating costs.
③ In terms of stability, the EDI system utilizes a modular, integrated design with a high degree of automation, enabling 20 hours of continuous operation. Fluctuations in effluent quality are minimal, eliminating the need for frequent resin replacement or regeneration wastewater treatment.

What is the significance of the Electrodeionization machine?

In the electronics and semiconductor industry, even trace amounts of ions in the water during chip manufacturing can cause short circuits and performance failure. The ultrapure water produced by EDI system minimizes trace ions, ensuring chip yields.

In the pharmaceutical industry, high-purity water that meets pharmacopoeial standards is required for everything from mixing ingredients and washing to sterilizing medical devices. EDI machine effectively removes impurities such as ions and microorganisms from water, preventing drug contamination and ensuring drug safety.

In the power industry, ionic impurities in boiler feed water at thermal and nuclear power plants can cause scaling and corrosion, seriously impacting equipment life and operational safety. The high-purity water produced by EDI system prevents scaling and corrosion, ensuring the stability of power generation units.

Highly purified water is also required in the food and beverage industry, laboratory research, and new energy battery industries.

Summarize

With the continuous advancement of technology, electrodeionization machine is constantly upgrading. For example, it boasts higher deionization efficiency, a wider range of water quality compatibility, and lower energy consumption. Its function has also evolved from single-purpose deep deionization to “multi-faceted integration.” For example, it combines pretreatment technologies such as ultrafiltration and reverse osmosis to form an integrated water treatment system to meet the customized purification needs of complex water sources.
In short, electrodeionization system achieves deep deionization of water in an efficient, environmentally friendly, and stable manner, producing high-purity water. Its resulting environmental, energy-saving, and convenient advantages have also made EDI equipment increasingly influential in water treatment solutions.
As the “core of purification,” EDI system is becoming the link between high-quality water demand and the development of the water treatment industry. If you require information on this type of equipment, please feel free to contact us.