Industrial Reverse Osmosis Edi Ultrapure Water System For Water Treatment Solutions

Industrial Reverse Osmosis EDI Ultrapure Water System For Water Treatment Solutions

Industrial Reverse Osmosis EDI Ultrapure Water System integrates RO membrane separation and continuous electrodeionization technology to produce high-standard ultrapure water. It is equipped with high-precision liquid filter for raw water pretreatment, often matched with industrial reverse osmosis equipment, and you can refer to the 5 T/H RO equipment configuration list for front-end pretreatment scheme design. Compared with traditional RO vision exchange equipment, this combined system cuts down the operating cost of industrial RO equipment significantly. We supply complete sets following unified industrial RO equipment acceptance criteria and provide a professional RO equipment construction/installation plan. Widely adopted in power plants, chemical industry and biopharmaceutical industry, this article elaborates product composition, working principle, core technical parameters, manufacturing quality standards, diversified application scenarios and sorts out common operation problems to support your equipment selection.

1. Product Introduction

Industrial Reverse Osmosis EDI Ultrapure Water System is an integrated two-stage water treatment assembly combining industrial reverse osmosis equipment and EDI continuous electrodeionization module, serving as mainstream equipment for ultrapure water preparation in modern manufacturing. Traditional ultrapure water production mostly relies on RO vision exchange equipment, which requires frequent chemical regeneration and generates a large amount of wastewater. The RO+EDI combined system abandons frequent acid-alkali regeneration, realizing continuous, stable and environmentally friendly ultrapure water production.

The whole system adopts skid-mounted integrated design, including raw water pretreatment unit, primary reverse osmosis unit, secondary reverse osmosis unit, EDI ultrapure water unit, automatic dosing system, PLC intelligent control cabinet and online water quality monitoring instruments. Customers with medium water demand can take the mature 5 T/H RO equipment configuration list as the reference for the pre-RO section, and expand EDI modules on this basis. Before on-site delivery, every complete set will be inspected in accordance with industrial RO equipment acceptance criteria to guarantee factory performance. After equipment arrival, our engineering team can implement layout construction according to the standardized RO equipment construction/installation plan, greatly shortening installation and commissioning cycles.

Many purchasers pay close attention to the operating cost of industrial RO equipment in long-term operation. The optimized RO+EDI process improves system water recovery rate, reduces chemical consumption, and effectively controls daily operation expenditure. If you are uncertain about equipment specification, you can read our guide on how to size industrial reverse osmosis equipment to calculate the required water production capacity according to raw water TDS, target resistivity and working hours. The complete industrial RO system flow diagram/P&ID will be delivered together with equipment orders. For large-scale projects, the supporting large-scale RO equipment operation manual covers startup, daily patrol, membrane maintenance and shutdown specifications, helping operators avoid common faults in industrial RO equipment caused by non-standard operation.

Different from single-stage industrial RO equipment that only produces pure water, the RO+EDI ultrapure water system can stably produce resistivity up to 15–18.2MΩ·cm ultrapure water, which cannot be reached by simple reverse osmosis equipment alone. It has become the preferred solution for enterprises that have high requirements on water purity.

2. Working Principle 

To learn how industrial reverse osmosis equipment works, we first understand the RO section, then further introduce the EDI deep purification process of this integrated system.

The first stage: Reverse Osmosis Purification

Raw water passes through multi-media filter, activated carbon filter and security filter for pretreatment, removing suspended solids, colloids, residual chlorine and particulate pollutants to protect the RO membrane elements. Pressurized by high-pressure pump, water flows into reverse osmosis membrane housing. Under external pressure, water molecules penetrate the semi-permeable membrane, while dissolved salts, organics, bacteria and heavy metal ions are intercepted. This process removes more than 97% of inorganic salts in raw water. The produced permeate water from double-pass RO generally reaches conductivity below 5μS/cm, but still cannot meet ultrapure water requirements.

The second stage: EDI Continuous Electrodeionization Deep Desalination

RO product water enters the EDI module. EDI contains mixed ion exchange resin, anion and cation exchange membranes, positive and negative electrodes. Under the action of DC electric field, residual ions in water migrate directionally through ion exchange membranes. The resin continuously completes self-regeneration by electrolyzed water, eliminating the need for regular manual acid and alkali regeneration required by traditional RO vision exchange equipment. After EDI treatment, the residual trace ions are thoroughly removed, finally obtaining high-purity ultrapure water.

The two-stage process realizes physical membrane separation + electric desalination linkage. The automatic control system monitors conductivity, resistivity, pressure and flow in real time, and automatically executes membrane flushing and parameter adjustment to reduce common faults in industrial RO equipment and extend the service life of membrane components and EDI stacks.

3. Core Technical Parameters

We support fully customized design based on on-site raw water quality and customer production demands. Standard configuration parameters of Industrial Reverse Osmosis EDI Ultrapure Water System are as follows:

Water production capacity: 0.5m³/h ~ 50m³/h, customizable; the 5T/H specification is one of the most popular standard models, details can be checked in the 5 T/H RO equipment configuration list

Outlet water quality: Resistivity stable at 15 ~ 18.2 MΩ·cm (25℃)

Single-pass RO salt rejection rate: ≥97%; Double-pass RO salt rejection rate ≥99%

System water recovery rate: 70% ~ 80%

Raw water feed requirement: Raw water turbidity ≤1NTU, residual chlorine <0.1mg/L

Working temperature: 5℃ ~ 40℃

Control mode: Full-automatic PLC control, equipped with online conductivity & resistivity monitor, automatic flushing, high and low pressure protection

Material option: FRP membrane housing / stainless steel membrane housing; pipeline adopts UPVC / 304 / 316L stainless steel optional

4. Product Quality Standard

All components of our Industrial Reverse Osmosis EDI Ultrapure Water System follow strict quality control standards.

First, the core RO membrane elements adopt internationally recognized high-rejection membrane components, with stable desalination performance and strong anti-pollution ability. EDI stacks adopt integrated sealing technology to avoid internal leakage.

Second, pressure vessels, pipelines, valves and pumps are selected from well-known brands. Before delivery, the whole machine will pass pressure test, continuous running test and water quality test in strict accordance with industrial RO equipment acceptance criteria.

Third, the skid-mounted frame adopts anti-rust spray treatment or stainless steel integrated welding, adapting to humid factory environment. We provide complete large-scale RO equipment operation manual, installation drawings and spare parts list.

Fourth, our technical team provides long-term remote guidance and on-site after-sales service. Regular maintenance suggestions can effectively lower the operating cost of industrial RO equipment and reduce unexpected downtime caused by common faults in industrial RO equipment.

5. Application Fields of Industrial Reverse Osmosis EDI Ultrapure Water System

This RO+EDI ultrapure water system has broad market coverage, corresponding to multiple industrial industries:

Power industry: Application of RO equipment in power plants, used for boiler make-up water, electric power semiconductor cooling ultrapure water

Chemical industry: Refer to our RO equipment selection guide for chemical industry; used for fine chemical reaction water, reagent dilution water

Electronic & semiconductor industry: Chip cleaning, circuit board production ultrapure water

Pharmaceutical industry: Injection water, purified water for pharmaceutical preparations

Laboratory & scientific research: High-purity experimental water for universities and testing institutions

New energy industry: Lithium battery, photovoltaic panel production cleaning water

Different industries have different standards for ultrapure water indexes. Our engineers can adjust the equipment configuration scheme according to local raw water quality to match your production requirements.

Frequently Asked Questions 

FAQ1

Q: What is the difference between RO+EDI ultrapure water system and traditional RO vision exchange equipment?

A: Traditional ion exchange equipment needs periodic acid and alkali regeneration, producing corrosive wastewater. The RO+EDI system realizes continuous self-regeneration without chemical agents, lower operating cost of industrial RO equipment, simpler operation and more environmentally friendly.

FAQ2

Q: Can I use single-pass reverse osmosis to match EDI module directly?

A: Normally we recommend double-pass industrial reverse osmosis equipment as pretreatment for EDI. If raw water TDS is low, single-pass RO can be adopted after calculation. You can consult us and refer to how to size industrial reverse osmosis equipment for scheme confirmation.

FAQ3

Q: What outlet water quality can Industrial Reverse Osmosis EDI Ultrapure Water System reach?

A: Under stable operating conditions, the produced ultrapure water resistivity can maintain 15–18.2 MΩ·cm at 25℃, meeting most electronic, pharmaceutical and laboratory ultrapure water standards.

FAQ4

Q: How to reduce common faults in industrial RO equipment in the RO+EDI system?

A: Standard pretreatment is essential. Strictly control raw water turbidity and residual chlorine; implement regular automatic flushing; operate according to large-scale RO equipment operation manual; regularly clean RO membrane elements to prevent contamination and scaling.

FAQ5

Q: Is the 5 ton per hour RO+EDI unit a mature standard model?

A: Yes. The 5T/H model is widely used. You can check the 5 T/H RO equipment configuration list to learn the standard layout, and we support personalized parameter modification based on your demands.

FAQ6

Q: Do you supply RO equipment construction/installation plan after order?

A: Yes. After order confirmation, we provide P&ID industrial RO system flow diagram, foundation drawing and standardized construction/installation plan. Engineers can provide on-site guidance service as requested.

Other products you may want to know about:

Industrial RO equipment acceptance criteria

RO Membrane

High-Flow Filter Cartridges