The CDRO spiral flow reverse osmosis (RO) membrane is designed for high-efficiency water treatment and resource reuse systems. Its unique spiral open-channel structure creates a circulating helical flow within the membrane column, providing strong surface scouring and self-cleaning. This significantly reduces membrane fouling and concentration polarization.
The membrane module is suitable for municipal, industrial, and high-pollution water environments, delivering stable high-quality water and improving overall system efficiency.
The CDRO membrane module consists of disc-shaped membrane sheets, a flow distribution plate, a central support rod, and a pressure-resistant membrane housing. Raw water enters the top of the column and flows downward into the lower inlet plate, then into the flow distribution plate.
A “radar-scan” style flow is created between the flow plate and membrane sheets. Protrusion patterns generate turbulence that enhances surface scouring. Water passes through coin-slot openings into the next section, forming a rotating vortex circulation.
Under pressure, water molecules permeate the membrane sheets and are collected through the central tube to produce permeate. The spiral vortex flow continuously reduces concentration polarization, maintains high system efficiency over time, and achieves low energy filtration with a pressure drop of 0.1–0.2 bar per unit area.
· Wide Flow Channels in Distribution Plates: Improves water passage and reduces clogging.
· Linear Protrusion Pattern: Enhances turbulence and membrane surface scouring efficiency.
· Strong Self-Cleaning Capability: Minimizes fouling and extends membrane lifespan.
· Coin-Slot Design: Optimizes fluid path and reduces pressure loss.
· Vortex Spiral Flow Structure: Promotes circulating rotation, improving overall filtration efficiency.
· High Operational Stability: Reduces concentration polarization, ensuring long-term performance.
· Low Pressure Drop: 0.1–0.2 bar per unit area, delivering energy-efficient operation.
· Compact and Modular: Easy to install, maintain, and integrate into existing systems.
· Municipal Drinking Water Treatment: Produces high-quality water for industrial reuse or domestic supply.
· Municipal Wastewater Treatment and Reuse: Suitable for urban sewage reclamation projects.
· Mine Water Treatment: Handles high suspended solids and high-salinity water.
· Steel and Coking Wastewater Treatment: Treats high-strength industrial wastewater for end-use reuse.
· Zero-Discharge Chemical Wastewater Systems: Concentrates residual liquids and reduces downstream treatment loads.
· High-Quality Reuse and Zero-Discharge Projects: Ideal for municipal park wastewater reuse, industrial effluent polishing, and high-recovery water treatment systems.
| Parameter | CD9-140bar Module | CD15-30/90bar Module | CD152-30/90bar Module | CD15-90bar High Temp | CD15-90bar Acid-resistant |
| Membrane Material | PA Composite RO Membrane | PA Composite RO/NF Membrane | PA Composite RO/NF Membrane | PA Composite RO Membrane | Acid-resistant NF Membrane |
| Max Operating Pressure | 140 bar | 30 bar / 90 bar | 30 bar / 90 bar | 90 bar | 90 bar |
| Membrane Area (sheets) | 9.0 m² (115 sheets) | 15.0 m² (199 sheets) | 15.2 m² (199 sheets) | 15.0 m² (199 sheets) | 15.0 m² (199 sheets) |
| Flux Range | 5~30 LMH (depending on feed) | ||||
| Feed Flow Rate | 750~900 L/h (max 1200) | 650~900 (max 1000) | 800~1200 (max 1350) | 650~900 (max 1000) | 650~900 (max 1000) |
| Recovery Rate | <45% (per module) | ||||
| Pressure Drop | 1~2 bar | 2~4 bar | 1~3 bar | 2~4 bar | 2~4 bar |
| Spacer Width | 2.5 mm | 1.8 mm | 2.5 mm | 1.8 mm | 1.8 mm |
| Operating Temp | <45°C | <45°C | <45°C | <80°C | <45°C, chlorine should be removed |
| pH Range (continuous) | 3~10 | 3~10 | 3~10 | 6~8 | Acid resistance: |
| pH (cleaning, 30min) | RO: 1~13; NF: 1~12 | H₂SO₄ ≤20%; HCl ≤20%; HNO₃ ≤5% | |||
| Dimensions (mm) | Φ322×1172 | 275×275×1370 / 1380 | 275×275×1783 / 1800 | 275×275×1380 | 275×275×1380 |
| Weight (Dry/Wet) | 120 kg / 150 kg | 85/95 kg / 125/135 kg | 115/125 kg / 165/175 kg | 99 kg / 139 kg | 99 kg / 139 kg |
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