- Qingqingquan
- Shandong
- 20 days
- 300 units per month
Complete guide to industrial deionized water systems: learn how RO+DI systems produce 18MΩ.cm ultrapure water for electronics, pharmaceuticals & more. Free technical PDF.
Ultimate Guide to Deionized Water Systems (2025 Update)
What is Deionized Water?
Deionized (DI) water removes ionized impurities through:
• Ion exchange resins (traditional method)
• RO membrane technology (modern standard)
• Purity levels: Up to 18 MΩ·cm ("ultrapure water")
*Key fact: Semiconductor industry requires <0.1μS/cm conductivity*
How Deionization Systems Work
1. Core Technologies
Mixed bed ion exchange:
• Combines cation/anion resins
• Produces 1-18 MΩ·cm water
RO+DI hybrid systems:
• RO pretreatment extends resin life
• Eliminates 99% organic contaminants
2. System Components
| Component | Function | Output Quality |
|---|---|---|
| Pretreatment | Removes solids/organics | SDI<3 |
| RO Membrane | Reduces TDS by 99% | 5-50μS/cm |
| DI Polishing | Final ion removal | 1-18 MΩ·cm |
7 Key Advantages of Modern DI Systems
✅ Continuous operation (95% recovery rate)
✅ Zero chemicals (no acid/alkali regeneration)
✅ Compact design (50% smaller footprint)
✅ Automated controls (24/7 monitoring)
✅ No wastewater (eco-friendly solution)
✅ Low maintenance (1-2 service/year)
✅ Multi-industry use (electronics to cosmetics)
Cost savings: 60% lower than distillation methods
Industry Applications
1. Electronics Manufacturing
• Silicon wafer cleaning (18 MΩ·cm)
• PCB production
• LCD panel fabrication
2. Pharmaceutical
• USP/EP compliant water
• Vaccine production
• Laboratory applications
3. Energy Sector
| Application | Purity Required |
|---|---|
| Battery production | 15 MΩ·cm |
| Power plant feedwater | 5 MΩ·cm |
| Solar cell manufacturing | 10 MΩ·cm |
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