How Demineralized Water System Produce High-Purity Water
Introduction to Haiyuan Demineralized Water System (DM System)
Haiyuan’s Demineralized Water System is designed to remove dissolved salts, minerals, and ions from raw water, producing high-purity water, low-conductivity water for industrial applications.
Our DM water systems use advanced technologies such as ion exchange, two-bed (cation and anion), mixed-bed, RO, and EDI to ensure stable water quality and achieve high-purity water.
Haiyuan provides fully customized DM water solutions ranging from 1 m³/h to 100 m³/h, suitable for factories, laboratories, power plants, and commercial use.
Haiyuan Customizable DM Water Plant – Designed with Various Technologies
Haiyuan’s demineralized water system can be built using different process combinations:
1.RO + EDI Demineralization Plant
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RO removes 98–99% of TDS
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EDI polishes RO water to achieve ultrapure water
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Suitable for electronics, pharmaceuticals, laboratory applications
2.Two-Bed Ion Exchange (Cation + Anion Resin)
Common in medium-purity DM water plants, used for general industrial demineralization.
3. Mixed-Bed Ion Exchange System (MB)
Often used as a polishing step in demineralized water plants to reach very low conductivity.
4. RO + Mixed Bed Demineralized Water System
RO reduces salt load, mixed bed completes mineral removal.
Efficient and widely used in industrial demin water systems.
Process Flow of Each Technology
1.RO + EDI Demineralization Plant：
1.Pretreatment (sand/carbon filter)
2.Cartridge filter
3.Reverse osmosis
4.EDI module
5.Pure water tank
6.Distribution pump
2.Two-Bed Demineralization Plant Flow
1.Raw water pump
2.Cation bed
3.Anion bed
4.Product water tank
Suitable for power plants, boiler feed water.
3.Mixed-Bed Demineralized Water System Flow
This process is straightforward, involving the combination of cation and anion exchange resins in a single column to achieve ultra-pure water.
4.RO + Mixed Bed Demin Water Plant Flow
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Raw Water Tank
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Raw Water Pump
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Multimedia Filter
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Activated Carbon Filter
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(Optional) Softener
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RO System
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Mixed Bed
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Product Water Tank
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(Optional) Regeneration System
Haiyuan demineralized water plants (DM water plants) are widely used in:
1.Industrial
Boiler feed water
Cooling tower make-up
Chemical & petrochemical production
Textile, printing, and dyeing
Food & beverage processing
2.High-Purity Water
Pharmaceuticals
Laboratories
Electronics, chips, solar panels
Battery manufacturing
3.Commercial
Hotels & hospitals
Cleaning & washing industries
Technology Comparison
| Technology | Advantages | Disadvantages |
|---|---|---|
| RO + EDI | High water quality, no chemical regeneration, stable operation | Higher initial cost |
| Mixed-Bed (MB) | High water quality, proven technology | Requires chemical regeneration, more maintenance |
| Single-stage RO | Low investment, simple operation | Moderate water quality, not suitable for high-purity water |
| RO + DM | Low conductivity, versatile applications | Resin needs periodic replacement |
Advantages & Features
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Stable Water Quality: Advanced RO, EDI, and mixed-bed technologies ensure low, consistent conductivity.
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Automated Control: PLC system enables automatic operation, remote monitoring, and alarms.
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Energy Efficient: Low electricity and chemical use reduce costs and environmental impact.
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Compact & Modular: Containerized or modular design saves space and allows easy installation.
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Scalable: Units can be added or upgraded to meet growing water demand.
FAQ：Questions customers might ask
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Q1: Can the water be used for drinking?
A: DM water is generally for industrial and laboratory use. If drinking water is needed, additional post-treatment like activated carbon or remineralization is recommended. -
Q2: What capacity ranges are available?
A: Haiyuan can customize DM systems from 1,000 L/h up to 50 m³/h to meet different production scales. -
Q3: What if the raw water quality is poor?
A: Multi-stage pre-treatment, including sand filter, activated carbon, and softener, can be added to protect RO and EDI units. -
Q4: What is the system’s service life?
A: With proper operation and maintenance, RO membranes last 3–5 years, and EDI units or mixed-bed resins last 2–4 years. -
Q5: Can the system be customized?
A: Yes, Haiyuan supports customized designs based on capacity, raw water quality, and application scenarios, including modular and containerized solutions.
Customization Options from Haiyuan
Haiyuan specializes in custom-built DM water systems and demineralization plants, offering:
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Flow rate customization (1–100 m³/h)
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Process selection: RO, EDI, mixed bed, ion exchange
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Containerized or skid-mounted design
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Optional PLC control + remote monitoring
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Stainless steel piping (SS304/SS316)
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Custom layout according to client space
Every demin water plant can be Customized according to feed water quality and final water purity requirements.
Maintenance & After-Sales
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Daily Maintenance: Inspect pumps, valves, and pipelines; clean pre-treatment filters; monitor water conductivity.
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Consumable Replacement: Replace RO membranes, EDI units, or mixed-bed resins according to water quality and usage.
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System Servicing: Annual comprehensive inspection recommended, including pipe flushing and chemical cleaning of membranes.
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After-Sales Service: Haiyuan offers one year of after-sales service. After ordering, we quickly manufacture, install, and commission the system, providing an electronic manual and remote support.
Haiyuan’s DM water plants and demineralized water systems are designed with advanced technologies including RO, EDI, two-bed, and mixed-bed processes to meet diverse industrial water needs. Whether you require high-purity water for industrial, commercial, or laboratory applications, our customizable solutions ensure stable performance and optimal efficiency.
Contact us today!
Our engineers will provide professional pre-purchase guidance and a free quotation.
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Email: haiyuan@swroplant.com