EDI electrodialysis desalination equipment

Working principle

The EDI equipment is filled with a mixture of cation and anion exchange resins, and cation and anion exchange membranes and electrodes are installed on both sides.

After the raw water enters the module, ions in the water are adsorbed by the resin; Electricity forms an electric field that drives cations to migrate towards the cathode and anions to migrate towards the anode, passing through the corresponding ion membrane and entering the concentrated water chamber for separation and discharge.

The resin in the freshwater chamber is continuously ionized and regenerated, without the need for acid-base cleaning agents throughout the process, producing low conductivity and high-purity water continuously and stably; Paired with pre reverse osmosis pretreatment, it can significantly reduce EDI load and extend module lifespan.

Equipment configuration

The whole machine is integrated with a complete pipeline, self-control, pressurization, and cleaning unit, and seamlessly connected with the reverse osmosis system

• EDI membrane core module: Anti pollution industrial grade EDI membrane block, high desalination efficiency, low inlet water quality resistance, slow attenuation during long-term operation
• Concentrated water circulation boosting system: silent energy-saving centrifugal pump, stable concentrated water flow, balanced membrane stack internal water pressure
• Acid base online cleaning unit (optional): Regular chemical cleaning to restore membrane stack flux and cope with high silicon and high organic matter raw water
• PLC intelligent self-control system: touch screen fully automatic operation, monitoring water conductivity, concentrated water flow rate, voltage and current, automatic protection for water shortage, overload, and low voltage, supporting remote data viewing
• Sanitary grade pipeline rack: The overcurrent components are made of SS304/316L stainless steel, which is corrosion-resistant without secondary pollution and suitable for clean production environments
• Supporting monitoring instruments: online conductivity, resistivity, flow sensors, real-time visualization of water quality data

Product advantages

Deep desalination, long-lasting and stable water quality

Efficiently removing trace ions, silicon, and bicarbonate ions, the effluent resistivity can reach 15-18.25M Ω· cm, and the water quality is not affected by small fluctuations in the raw water, meeting high-end ultrapure water standards.

No chemical regeneration, green and environmentally friendly, cost saving

Abandoning the mixed bed acid-base regeneration process, eliminating the discharge of waste acid and alkali, saving the cost of drug procurement, storage, and neutralization treatment, and making the workshop environment cleaner and safer.

Fully automatic continuous operation, no need for dedicated personnel to be on duty

24-hour uninterrupted water production, automatic flushing, automatic parameter adjustment, real-time fault alarm, significantly reducing manual operation and inspection frequency.

Low operating energy consumption and high water utilization efficiency

Low voltage electric field desalination design, with much lower energy consumption than traditional ion exchange; Concentrated water can be recycled before reuse, resulting in a high overall water resource utilization rate.

Modular and flexible combination, suitable for various working conditions

A single multi membrane stack can be freely assembled, and can be matched with reverse osmosis and polishing mixed beds to form a complete ultrapure water system. The water production capacity can be customized in different sizes.

Application scenarios

• Electronic photovoltaic industry: chips, circuit boards, photovoltaic cells, ultra pure water back-end deep desalination
• Electric power and thermal industry: Preparation of high-purity desalinated water for power plant boilers
• Biopharmaceutical industry: pharmaceutical purified water, reagent preparation, high-purity water production
• Research laboratory: supporting equipment for primary ultrapure water for physical and chemical testing and chromatographic analysis
• Fine Chemicals: Cosmetics, New Materials, Electroplating High Purity Process Water

Technical parameters

• Water production flow rate 0.25-100T/H (customized as needed)
• Water production resistivity 10-18.25M Ω· cm (25 ℃)
• The inlet requires reverse osmosis to produce water with a conductivity of ≤ 20 μ S/cm
• Desalination effect: Silicon removal rate ≥ 99%, ion removal rate ≥ 99.9%
• Control mode: PLC fully automatic, online water quality monitoring, remote monitoring
• Main material: EDI membrane stack+SS304/316L stainless steel pipeline
• Working temperature 5-35 ℃
• Continuous and uninterrupted water production, automatic timed flushing
• Supporting process: two-stage reverse osmosis+EDI+polishing mixed bed ultrapure water complete process

After sales guarantee

Provide one-stop solution design, equipment production, pipeline laying, installation and maintenance services for direct drinking water system engineering, ensuring the safety and stability of public drinking water:

• Free water quality testing, scheme design, matching reverse osmosis unit with EDI complete set of solutions
• On site installation and debugging, whole machine linkage testing, one-on-one equipment operation and maintenance training
• Complete machine warranty for one year, special warranty for EDI membrane stack core components, lifetime technical remote support
• 24-hour after-sales quick response, on-site technical personnel for maintenance, without delaying the water supply of the production line
• Long term provision of membrane stack cleaning, component replacement, system upgrade, and regular water quality testing services