Equipment Name: Continuous Electrodeionization Equipment

· Full English name: ElectroDeionization

· English abbreviation: EDI

Product Introduction

What is EDI?

Continuous electrodeionization, abbreviated as EDI, is a advanced desalination technology that ingeniously integrates ion-exchange resins, ion-selective membranes, and a direct-current electric field.

Introduction to the Working Principle

An EDI module comprises numerous “small chambers” separated by cation- and anion-exchange membranes and mixed-bed resin. Under the influence of a direct-current electric field, ions in the water stream undergo directional migration:

1. Anions migrate toward the anode, passing through the anion-exchange membrane.

2. Cations migrate toward the cathode and pass through the cation-exchange membrane.

3. Ultimately, the ions are concentrated into a dedicated “concentrate chamber” and discharged from the system, while the “demineralized water chamber” through the resin bed produces high-purity water.

Meanwhile, the H⁺ and OH⁻ ions generated by the dissociation of water molecules under the influence of an electric field can continuously regenerate the resin, thereby enabling the simultaneous and continuous execution of ion exchange and resin regeneration.

Core Advantages

Why choose our EDI system?

1. Continuous stability and high-quality effluent

· 24/7 continuous operation: No downtime for regeneration is required, ensuring an uninterrupted supply of ultrapure water and maintaining production continuity.

· Extremely high effluent water quality: the resistivity of the produced water can stably reach 5–18.25 MΩ·cm, outperforming conventional mixed-bed systems.

2. Eco-friendly and acid-alkali free

· Completely eliminate the use of hazardous chemicals: By eliminating the storage, transportation, use, and neutralization processes for acids and bases, we have fundamentally addressed safety and environmental risks.

· Zero wastewater pollution: No acidic or alkaline regeneration wastewater is generated, ensuring compliance with the strictest environmental regulations and demonstrating corporate social responsibility.

3. Operational efficiency and controllable costs

· Significantly reduced operating costs: The primary energy consumption is electricity, and the operating expenses are substantially lower than the frequent regeneration costs associated with ion exchange.

· Reduced footprint: Modular design with a compact structure eliminates the need for large-scale acid and alkali storage and neutralization facilities.

· Easy maintenance: Highly automated operation reduces maintenance workload, resulting in significant labor cost savings.

4. Intelligent integration for easy management

· Easily integrated with upstream processes such as RO to achieve full-system automated control, truly enabling “unattended operation.”

· Modular design for easy expansion and maintenance.

Key Application Areas

Our EDI system is the ideal choice for industries with stringent requirements for water quality, safety, and continuity:

· Microelectronics and semiconductor industry: ultrapure water cleaning in the manufacturing processes of chips, integrated circuits, and liquid crystal panels.

· Power industry: Make-up water treatment for boilers in high-pressure and ultra-supercritical generating units.

· Pharmaceutical and Biotechnology:

· Pre-treatment of the Water for Injection (WFI) system.

· The core unit of the purified water preparation system.

· Water for bioprocessing and culture media.

· Chemical and Petrochemical Industries: Ultra-pure water required for high-end fine chemicals and catalyst production.

· Laboratories and Research: The central ultrapure water system provides a stable water supply for various analytical instruments.

Flexible Customization Services

Customize Your Exclusive EDI Solution

We fully recognize that the water source, water production capacity, and spatial requirements of each project are unique. Therefore, we offer comprehensive, customized solutions tailored to your specific needs.

1. Customized based on processing capacity and scale

· Standard integrated modules: Designed for small to medium flow requirements, these standardized all-in-one units are available in capacities ranging from 0.5 m³/h to 10 m³/h.

· Large-scale modular arrays: To meet high-flow requirements, multiple EDI modules can be connected in parallel, enabling ultra-large systems capable of processing several hundred tons per hour.

2. Customized core parameters

· Product water flow rate: Precisely designed based on your instantaneous and average daily water consumption.

· Effluent water quality: Based on your process requirements, ensure that key parameters such as resistivity, TOC, and silica content meet the specified standards.

· Recovery rate: Optimize system design to achieve the highest water utilization rate and conserve water resources.

· Pre-treatment process adaptation: Perfectly matches the effluent from your RO system, delivering the optimal integration solution.

3. Control System and Functional Customization

· Automation level: Ranging from basic automatic operation to fully intelligent PLC-plus-touchscreen control, with integrated data logging, remote monitoring, and early-warning capabilities.

· Protection system: Standard features include flow protection, low-hardness protection, and automatic restart upon power restoration, ensuring module safety.

· Materials and Connections: Piping and valves are available in materials such as UPVC, SS304, and SS316L, tailored to specific requirements.

4. Our Customization Process

Requirements Analysis → Solution Design and Simulation → Commercial Quotation → Contract Signing and Manufacturing → Factory Testing → Installation, Commissioning, and Training → After-Sales Support

Choosing our EDI technology means not just acquiring a piece of equipment—it means embracing a safer, more cost-effective, and more sustainable production approach.

Contact us now for free technical consultation and preliminary solution design!