Product Overview
Engineered for high-salinity marine environments, this industrial reverse osmosis system maximizes freshwater output and reduces energy consumption through multi-stage brine staging and isobaric energy recovery. By optimizing hydraulic performance and managing scaling risks, it delivers reliable high-purity water while minimizing concentrate disposal volumes for coastal industrial and municipal facilities.
Key Technical Specifications
|
Parameter |
Specification Value |
|
System Recovery Rate |
50% to 65% |
|
Design Feed TDS |
35,000 ppm to 45,000 ppm |
|
Permeate TDS |
< 300 ppm (Boron options < 0.5 ppm) |
|
Salt Rejection Rate |
99.2% (Stage), 99.8% (Cumulative) |
|
Operating Pressure |
6.5 MPa to 8.2 MPa (65 bar to 82 bar) |
|
Energy Consumption |
2.8 kWh/m3 to 3.8 kWh/m3 |
Core Technical Focus
Hydraulic Staging: Dual-array and inter-stage booster layouts maintain effective net driving pressure across concentrated high-osmotic streams.
Brine Flow Management: Controlled cross-flow velocity gradients suppress boundary-layer concentration polarization and particulate settlement.
Energy Recovery: Isobaric pressure exchangers capture up to 98% of hydraulic energy from reject brine to pressurize incoming feed.
Membrane Protection: High-rejection composite polyamide SWRO elements resist chlorine degradation and biological fouling tendencies.
Industrial Applications
Municipal Desalination: Large-scale public drinking water production meeting stringent low-boron and low-TDS regulations.
Refining & Petrochemical Plants: Process water supply and high-pressure boiler makeup generation using direct marine intake.
Power Generation Facilities: High-purity cooling tower makeup and demineralizer feed water production in coastal installations.
Island & Remote Units: Autonomous freshwater generation systems designed for continuous 24/7 baseload operation.
Operational Workflow
Pretreatment Conditioning: Multi-media filtration, ultrafiltration barriers, and continuous dosing control silt density index (SDI < 3) and prevent scale.
Pumping & Energy Transfer: Multistage pumps pressurize feed water while isobaric recovery units transfer energy from the concentrated reject stream.
Primary Reverse Osmosis: Pressurized feed enters primary pressure vessel arrays, separating high-purity permeate from concentrated brine.
Secondary Recovery Stage: Primary reject flows into a secondary high-flux booster module to push overall system recovery to target thresholds.
Post-Treatment Stabilization: Permeate undergoes degasification, pH adjustment, and remineralization prior to storage or distribution.
Major System Configuration
High-Pressure Pump Skid: Duplex (2205) or super duplex (2507) centrifugal pumps with VFD soft start control.
Energy Recovery Subsystem: Rotary isobaric recovery units featuring ceramic rotor cores to prevent fluid intermixing.
Pressure Vessel Assembly: ASME-coded fiberglass-reinforced plastic vessels housing 8-inch high-rejection SWRO elements.
Chemical Dosing Skids: Multi-channel metering pumps and polyethylene storage tanks for antiscalant and pH control.
Control Architecture: PLC panels featuring real-time inline monitoring with Modbus and Profibus industrial communication protocols.
Seawater Feed Water Requirements
|
Silt Density Index (SDI 15) |
< 3.0 |
|
Turbidity |
< 1.0 NTU |
|
Free Chlorine |
< 0.1 ppm |
|
Feed Temperature Range |
5°C to 45°C |
|
Oil & Grease |
< 0.5 ppm |
|
pH Range |
6.5 to 8.0 |
Permeate Water Quality
|
Total Dissolved Solids (TDS) |
< 300 mg/L |
|
Chloride Concentration |
< 150 mg/L |
|
Boron Concentration |
< 0.5 mg/L (with secondary polishing) |
|
Silt Density Index (SDI) |
< 1.0 |
|
Microbial Count |
Sterile (log-4 reduction via membrane barrier) |
Selection & System Design Guide
Salinity Evaluation: Align recovery targets with raw water TDS; higher salinity feeds require capped recovery to stay within osmotic limits.
Temperature Compensation: Factor in seasonal water temperature variations; lower temperatures increase viscosity and reduce flux.
Pretreatment Validation: Ensure incoming suspended solids and organic loads meet ultrafiltration effluent criteria prior to high-pressure stages.
Service Footprint: Allocate adequate clearance at both ends of pressure vessel skids for membrane element extraction and maintenance.
Customization Options
Corrosion-Resistant Materials: Wetted hydraulic components available in Super Duplex Stainless Steel (UNS S32750), 904L, or Titanium.
Redundancy Configuration: N+1 high-pressure pump arrangements and dual-train filtration lines for continuous 100% plant uptime.
Energy Monitoring Modules: Variable frequency drives paired with thermodynamic monitoring software to track real-time specific energy use.
Containerized Integration: ISO standard 20-foot or 40-foot CSC-certified enclosures complete with HVAC and power distribution centers.
Quality Control Standards
Hydrostatic Pressure Testing: All pressure vessels, manifolds, and high-pressure piping tested at 1.5x maximum allowable working pressure.
Welding Inspection: 100% radiographic and dye-penetrant testing (PT) on all super duplex stainless steel orbital welds.
Material Traceability: Mill test certificates provided for all pressure-containing metallic components conforming to EN 10204 3.1 standards.
Factory Acceptance Testing: Comprehensive dry and wet functional testing of control panels, instrumentation calibration, and pump performance prior to dispatch.
Frequently Asked Questions
Hot Tags: high-recovery seawater ro system, China high-recovery seawater ro system manufacturers, suppliers, residential ro system, ro purifier with hot water, rodi filter aquarium, Seawater desalination RO system, tankless ro system, whole house reverse osmosis water filter system