I.Two-stage RO process:
Raw Water → Pressurized Pump → Multimedia Filter → Activated Carbon Filter → Water Softener → Precision Filter → Primary RO → pH Adjustment → Intermediate Tank → Secondary RO → Purified Water Tank → Pure Water Pump → UV Sterilizer → Microporous Filter → Water Point
II.Parameters
Item | Specification | ||||||
Flow rate | 0.25~200m³/h | ||||||
Electricity Supply | 380V | ||||||
Produced Water Quality | Conductivity < 1μs/cm | ||||||
Core Technology | two-stage Reverse Osmosis (RO) | ||||||
Key Components | RO Membrane Modules | ||||||
Operation Mode | Full Automatic (PLC-controlled) | ||||||
TDS | <0.5mg/L | ||||||
pH | 7.0-8.0 | ||||||
Warranty period | 2-Year |
III.Desalination Advantages of Secondary RO
1.Primary RO desalination rate: 97–99% (affected by feedwater salinity and membrane condition).
2.Two-stage RO desalination rate: Up to 99.5–99.8% (due to lower contaminant loading in the primary RO product water feed).
3.System total desalination rate: ≈ 99.99% (cascade effect of dual stages).
"High desalination rate" is not only the outcome of two-stage RO but also the core objective of system design. Through optimized pretreatment (e.g., softening, scale inhibition), membrane array configuration (inter-stage boosting), and intelligent control systems (pH adjustment, flow balancing), desalination rates can be maintained at stable high levels long-term.