Electro deionization system for generation of purified water

Electro deionization (EDI) is a water purification technology that uses electricity, ion exchange membranes, and resin to remove ions from water. It's commonly used in industries requiring high-purity water, such as pharmaceuticals, electronics, and power generation. An EDI system works by applying an electric field to separate ions from water, allowing for the production of purified water without the need for chemical regeneration. If you have specific questions about EDI systems or need more information, feel free to ask!

How EDI System works

Electro deionization (EDI) works through a combination of ion exchange membranes and an electric field to remove ions from water. Here's a simplified explanation of how it works:

1. Ion Exchange Membranes:

An EDI system contains ion exchange membranes that are selectively permeable to ions. These membranes separate the water into two streams: a purified water stream and a concentrated ion stream.

2. Electric Field:

When an electric field is applied across the ion exchange membranes, it creates a driving force for ions to migrate through the membranes. Positively charged ions (cations) are attracted to the negatively charged electrode (cathode), while negatively charged ions (anions) are attracted to the positively charged electrode (anode).

3. Ion Removal:

As water flows through the EDI system, cations and anions are attracted to their respective electrodes and pass through the ion exchange membranes. This separation process effectively removes ions from the water, producing purified water in the process.

4. Regeneration:

Unlike traditional ion exchange processes that require chemical regeneration, EDI systems regenerate themselves continuously during operation. The concentrated ion stream that collects ions at the electrodes is periodically purged from the system, ensuring that the ion exchange membranes remain functional.

Conclusion

Overall, EDI systems offer a continuous and chemical-free method of producing high-purity water by utilizing ion exchange membranes and an electric field to remove ions from water streams.

What is the main purpose in water system 

The main purpose of Electro deionization (EDI) in a water system is to produce high-purity water by removing ions from the water stream. This process is crucial in various industries and applications where water of exceptional purity is required. Here are some key purposes of EDI in water systems:

1. Industrial Processes:

EDI is used in industries such as pharmaceuticals, electronics manufacturing, power generation, and semiconductor production, where high-purity water is essential for process efficiency and product quality.

2. Boiler Feed Water:

In power plants and other facilities with steam boilers, EDI systems are used to produce ultra-pure water for boiler feed, minimizing scaling and corrosion issues that can impact equipment performance and longevity.

3. Laboratory and Analytical Applications: 

Laboratories and analytical facilities rely on EDI systems to generate pure water for experiments, testing, and analytical equipment, ensuring accurate and reliable results.

4. Semiconductor Manufacturing:

The semiconductor industry requires ultra-pure water for rinsing, cleaning, and etching processes during chip manufacturing. EDI plays a critical role in providing the necessary water purity levels.

5. Pharmaceutical Production:

In pharmaceutical manufacturing, EDI is used to produce purified water for drug formulation, cleaning processes, and quality control measures, meeting stringent regulatory requirements.

6. Food and Beverage Industry:

EDI systems are also employed in the food and beverage industry to produce purified water for various production processes, ensuring product safety and quality.

Conclusion on EDI system:

Overall, the main purpose of EDI in a water system is to deliver consistently high-quality, pure water for critical industrial, commercial, and scientific applications.