Overview of Electrodeionization (EDI) System 　　Electrodeionization, abbreviated as EDI, is a pure water manufacturing technology that combines ion exchange technology, ion exchange membrane technology, and ion electromigration technology. It belongs to high-tech green environmental protection technology. EDI water purification equipment has the advantages of continuous effluent, no need for acid-base regeneration, and unmanned operation. It has gradually replaced mixed beds as precision treatment equipment in the system of preparing pure water. This advanced technology has good environmental protection characteristics and is easy to operate and use. It is increasingly recognized by people and widely promoted in industries such as medicine, electronics, power, and chemical engineering. Using EDI module as post-processing
Electrodeionization ultra pure water treatment equipment Adopting reverse osmosis host and EDI
Electrodeionization ultra pure water treatment equipment Working principle of Electrodeionization (EDI) system Electrodeionization (EDI) systems are mainly used inUnder the action of a direct current electric field, the dielectric ions in the water passing through the partition undergo directional movement, and the selective permeation of ions by the exchange membrane is used to purify water quality, which is a scientific water treatment technology. Between a pair of electrodes in an electrodialysis device, there are usually multiple sets of alternating arrangements of cathode membrane, anode membrane, and separator (A, B), forming a concentration chamber and a depletion chamber (i.e. cations can pass through the anode membrane, anions can pass through the cathode membrane) Cations in the dilute water migrate to the negative electrode through the cation membrane and are intercepted by the anion membrane in the concentrated chamber; The anions in the water migrate towards the positive electrode direction and are intercepted by the positive membrane in the concentration chamber. As a result, the number of ions in the water passing through the dilution chamber gradually decreases, becoming fresh water. In the concentration chamber, due to the continuous influx of anions and cations, the concentration of dielectric ions continues to increase, becoming concentrated water, thus achieving the purpose of desalination, purification, concentration or refinement.

Schematic diagram of Electrodeionization (EDI) system	EDI membrane

Advantages of Electrodeionization (EDI) System

　　1. No need for acid-base regeneration: In the mixed bed, the resin needs to be regenerated with chemical acid and alkali, and a workshop for safe storage of acid and alkali is required. During regeneration, a large amount of harmful wastewater and waste need to be treated, which increases the difficulty of environmental protection and safety work. EDI eliminates the handling and heavy workload of these harmful substances. Protecting the environment.
　　2. Continuous and simple operation: Due to each regeneration and changes in water quality in the mixed bed, the operation process becomes complex, while the water production process of EDI is stable and continuous, with constant water quality and no complex operating procedures, greatly simplifying the operation.
　　3. Reduced installation requirements: Compared to mixed beds with equivalent water treatment capacity, EDI systems have a smaller volume and adopt a modular structure that can be flexibly constructed according to the height and environment of the site. The modular design enables easy maintenance of EDI during production work.

Electrodeionization (EDI) water treatment equipment	Electrodeionization (EDI) water treatment equipment

Application Fields of Electrodeionization (EDI) Systems 　　1. Chemical water treatment in power plants
　　2. Ultra pure water for the electronics, semiconductor, and precision machinery industries
　　3. Preparation of food, beverages, and drinking water
　　4. Small pure water station, group drinking pure water
　　5. Fine chemical engineering and advanced science water use
　　6. Preparation of high-purity water required by other industries
　　7. Process water for pharmaceutical industry
　　8. Desalination of seawater and brackish water