HSEDI, or Hot Service Electrodeionization, is a water treatment system that combines the principles of electrodeionization (EDI) technology with the use of hot water for sanitization and regeneration of ion exchange resins. It is designed to produce high-purity water by continuously removing dissolved ions and impurities from the feedwater.

System Components and Process Steps

Ion Exchange Resin Beds : The HSEDI system incorporates ion exchange resin beds, similar to those used in conventional EDI systems. These resin beds consist of cation exchange resin and anion exchange resin, which selectively remove positive and negative ions from the water.
Electrodes : The HSEDI system contains electrodes, including an anode and a cathode, positione within the ion exchange resin beds. The electrodes facilitate the electrochemical reactions require for ion removal.
Hot Water Sanitization : Unlike conventional EDI systems, the HSEDI system utilizes hot water for the sanitization and regeneration of the ion exchange resins. The hot water is circulate through the resin beds to remove accumulate impurities, organic matter, and bacterial growth, ensuring the continue performance and cleanliness of the resin.
Direct Current Power Supply : A direct current power supply is use to apply an electric field across the ion exchange resin beds during the normal operation of the HSEDI system. The electric field promotes ion migration and facilitates the removal of ions from the water.
Pure Water Collection : The purified water, known as permeate, is collect after passing through the ion exchange resin beds. It is free from most dissolved ions and impurities, making it suitable for various applications, including ultrapure water for industries such as pharmaceuticals, electronics, and power generation.

Significance & Advantages

High-Purity Water : HSEDI systems can consistently produce high-purity water with low levels of dissolve ions, ensuring superior water quality for critical applications.
Continuous Operation : HSEDI systems operate continuously, eliminating for periodic regeneration cycles using chemicals, which is common in traditional ion exchange processes.
Hot Water Sanitization : The hot water sanitization process helps to remove organic fouling, microbial growth, and other contaminants from the ion exchange resins, maintaining their performance and extending their lifespan.
Energy Efficiency : HSEDI systems can be energy-efficient due to the absence of chemical regeneration processes and the ability to use waste heat or steam for hot water sanitization.

Regular monitoring, maintenance, and periodic hot water sanitization are essential to ensure the optimal performance and longevity of the HSEDI system. Manufacturers’ guidelines and industry best practices should be follow for safe and effective operation.