Standard & Custom Seawater Desalination Plants
Explore our core selection of CE-certified containerized reverse osmosis skids and water purification units, engineered for high recovery, low energy footprint, and extreme marine durability.
Engineering Architecture of Containerized SWRO Plants
Containerized seawater reverse osmosis (SWRO) systems represent a paradigm shift in decentralized water infrastructure. By consolidating pretreatment, high-pressure pumping, membrane separation, and mineralization into ISO maritime enclosures, plant operators bypass lengthy on-site civil works while securing rigorous quality control.
Corrosion-Proof Metallurgy
Seawater desalination environments demand superior metallurgy to resist pitting and crevice corrosion under pressures exceeding 65 to 80 bar. Tongjie integrates Super Duplex Stainless Steel (2507 / 1.4410) and SMO 254 for all high-pressure manifolds, coupled with internal HVAC systems that maintain positive air pressure and prevent salt-spray ingress into critical PLC cabinets.
Energy Recovery Devices (ERD)
Specific Energy Consumption (SEC) is the defining benchmark of SWRO operational viability. Our plants incorporate cutting-edge isobaric pressure exchangers (PX) that recover up to 98% of hydraulic energy from the concentrated brine reject stream, driving overall system energy consumption down to ≤2.8 to 3.2 kWh/m³ under nominal operating conditions.
Automated Cloud SCADA & AI CIP
Factory-integrated industrial Siemens or Allen-Bradley PLCs continuously monitor differential pressures, feed conductivity, and normalized permeate flux. Automated Clean-in-Place (CIP) systems trigger chemical flushes prior to irreversible biofouling or scaling, reducing operational downtime and prolonging spiral-wound membrane life beyond 5 to 7 years.
Why International EPCs Source From China OEM Factories
From mature marine-grade structural supply chains to world-class membrane fabrication and end-to-end Factory Acceptance Testing (FAT), Chinese manufacturing centers provide unmatched CAPEX and lead-time advantages.
Vertical Supply Integration
Shanghai Tongjie benefits from an unbroken localized supply ecosystem—from raw duplex steel forging and FRP pressure vessel winding to high-grade PLC panel fabrication—slashing delivery lead times by 35% compared to European assemblers.
Rigorous Factory FAT Testing
100% of our containerized units undergo full hydraulic and pressure testing using real seawater or simulated high-salinity brine in our Shanghai testing bay before crating. Flanges, pumps, and control loops are fully pre-validated prior to sea freight dispatch.
CE & International Standards
Every system conforms directly to EU Machinery Directives (2006/42/EC), Low Voltage Directives, and Pressure Equipment Directives (PED). Tongjie is fully certified under ISO 9001, ISO 14001, and ISO 45001 occupational safety regimens.
Direct OEM/ODM Engineering
We provide full white-label and ODM support for EPC contractors and water utilities. Our in-house engineering squad personalizes process flow diagrams, 3D container layouts, electrical schematics, and language-specific HMI consoles within 48 hours.
Global Industrial Deployment & Localized Use Cases
From the arid coastal deserts of the Middle East to isolated island resorts and offshore oil & gas rigs, containerized SWRO units provide resilient, decentralized water autonomy.
Island Resorts & Remote Municipalities
Isolated communities frequently face high municipal pipeline costs and land scarcity. A standard 40ft containerized SWRO installation delivers 500 to 2,000 m³/day of WHO-standard potable water, occupying minimal ground footprint while preserving local coastal aesthetics.
Offshore Platforms & Marine Vessels
Tongjie marine-grade skids are shock-resistant and designed with marine vibration dampening mounts. Utilizing anti-biofouling DAF/UF pretreatment trains, they generate reliable boiler feed water, turbine cooling fluid, and operational tap water in harsh open-sea conditions.
Mining, EPC Camps & Disaster Relief
When mining extraction or civil engineering projects commence in remote arid territories, water availability dictates timelines. Our pre-piped, plug-and-play modular containers connect to local generator sets and sea/brackish intakes, initiating freshwater delivery within 48 hours of site arrival.
| Model Series | Permeate Output | Feed Salinity (TDS) | Energy Recovery | Footprint Dimension | Target Sector |
|---|---|---|---|---|---|
| TJ-SWRO-250C | 250 m³/day (10.4 m³/h) | Up to 45,000 ppm | Energy Recovery Turbine | Standard 20ft ISO Enclosure | Resorts, Coastal Rigs, Remote Camps |
| TJ-SWRO-500C | 500 m³/day (20.8 m³/h) | Up to 45,000 ppm | Isobaric PX Device (98%) | High-Cube 20ft ISO Container | Municipal Decentralized, EPC Sites |
| TJ-SWRO-1000C | 1,000 m³/day (41.6 m³/h) | Up to 50,000 ppm | Dual PX Energy Recovery | Standard 40ft High-Cube Enclosure | Coastal Power Plants, Chemical Parks |
| TJ-SWRO-2000C | 2,000 m³/day (83.3 m³/h) | Up to 50,000 ppm | Multi-Train Isobaric System | Modular 2x 40ft Container Cluster | Municipal Utilities, Large Mining Hubs |
Emerging Technological Trends in Containerized Desalination
The global seawater desalination industry is rapidly pivoting toward green decarbonization, autonomous digital twin management, and zero liquid discharge (ZLD) integration.
Off-Grid Solar & Hybrid Coupling
By pairing containerized SWRO units with variable-frequency drive (VFD) high-pressure pumps and battery/photovoltaic hybrid microgrids, facilities can achieve 100% off-grid clean water production, completely independent of fossil fuel supply lines.
Digital Twins & Predictive Maintenance
Cloud-based edge telemetry tracks osmotic pressure elevation, temperature gradients, and SDI values in real-time. Machine-learning models predict fouling patterns up to 3 weeks ahead, enabling precise chemical dosing and minimizing unpredicted shutdowns.
Brine Concentration & Zero Liquid Discharge
Disposal of high-salinity brine into sensitive coastal ecosystems faces growing environmental scrutiny. Combining SWRO with Disc Tube Reverse Osmosis (DTRO) and Mechanical Vapor Recompression (MVR) drives brine toward valuable mineral crystallization and pure Zero Liquid Discharge (ZLD).
Frequently Asked Questions by Overseas Buyers
Comprehensive answers to common technical, compliance, and logistical inquiries raised by EPC consultants, utility managers, and industrial procurement officers.
We require raw water TDS, temperature variances, silica, SDI, targeted permeate daily volume, recovery requirements, and site electrical voltage/frequency (e.g., 380V/480V 50/60Hz). With these inputs, our engineering team runs ROSA/WAVE projection software to configure exact pump sizing and membrane arrays.
Every enclosure undergoes sandblasting and multi-layer marine epoxy painting (C5-M standard). Internally, we install heavy-duty dual split HVAC units, positive pressure air filtering, and use 316L/Super Duplex 2507 stainless steel and FRP piping to ensure a 20+ year asset service life.
Because our systems undergo comprehensive wet Factory Acceptance Testing (FAT) in Shanghai, on-site commissioning typically takes just 10 to 15 days. Site contractors only need to set the level concrete pads, connect the feed water intake, product water line, brine reject, and primary power terminal.
Yes. Tongjie holds CE certificates covering EU Machinery Directives and Pressure Equipment Directives. All electrical control cabinets can be supplied with UL 508A compliance or IEC international standards, supported by full ISO 9001 quality documentation.
Advanced Industrial Water Treatment Systems
Explore our specialized portfolio of membrane deoxygenation, fracturing flowback water recovery, electronic-grade ultrapure water (18.2 MΩ·cm), and ultrafiltration water reuse trains.
