Engineered Desalination & Pure Water Equipment Systems
Pre-assembled, factory-tested (FAT), and containerized water solutions ready for global shipping and fast field commissioning.
Enterprise-Scale Ocean Desalination Engineering Architecture
Resolving coastal water scarcity, strict municipal environmental compliance, and industrial production demands across five continents.
Procurement Needs for Global EPCs
Global general contractors face severe risks in logistics latency and field construction errors. Our containerized ocean reverse osmosis (SWRO) systems eliminate up to 70% of on-site civil fabrication time by integrating pretreatment, duplex stainless high-pressure piping, and automated CIP skids inside standard ISO containers.
Energy Recovery Technology
Power represents up to 55% of desalination lifecycle OPEX. Tongjie integrates state-of-the-art Isobaric Energy Recovery Devices (ERD), transforming brine reject pressure into forward feed power, driving energy consumption below 2.8-3.0 kWh/m³ and maximizing long-term operating viability for municipal and commercial developers.
Severe Corrosion Resistance
Processing hyper-saline oceanic feed containing 35,000 to 45,000 ppm TDS requires strict material metallurgy. Tongjie utilizes Super Duplex Stainless Steel (2507 / 1.4410) and specialized SMO 254 manifoldings to eliminate pitting, crevice corrosion, and premature stress cracking across high-pressure membrane housings.
5-Stage Ocean Desalination Engineering Process
A precision-calculated separation path engineered for extended membrane service life and uncompromised permeate stability.
Intake & Pre-Treatment
Automated DAF (Dissolved Air Flotation) combined with ultrafiltration (UF) screens to lower Silt Density Index (SDI < 3), protecting membranes against severe bio-fouling and seasonal red tides.
Chemical Conditioning
Inline dosing of NSF-approved antiscalants, bisulfite de-chlorination systems, and pH stabilizers to eliminate calcium carbonate and barium sulfate scaling on spiral wound elements.
High-Pressure SWRO
Positive displacement or multi-stage centrifugal pumps drive feed seawater through high-rejection polyamide thin-film composite membranes at pressures reaching 65 to 80 bar.
Isobaric Energy Recovery
Pressure exchanger devices (PX) capture residual brine kinetic energy, recirculating hydraulic pressure back into the high-pressure feed stream with efficiency exceeding 96%.
Remineralization & Polish
Permeate conditioning with calcite contactors, sodium hydroxide dosing, and UV disinfection to meet WHO potable drinking standards or ultra-pure boiler feed requirements.
Worldwide Industrial Status & Geographic Realities
Customized desalination engineering calibrated for localized salinity, ocean temperature shifts, and regulatory standards.
Middle East & GCC Region
Dealing with hyper-saline feed waters (TDS > 45,000 mg/L) and elevated sea temperatures. Tongjie provides specialized temperature compensation algorithms and heavy-duty pre-cooling trains for GCC oilfields and industrial hubs.
Island Resorts & Mining Ports
Off-grid regions across Southeast Asia, the Pacific, and South America rely on containerized, plug-and-play seawater RO skids coupled with hybrid solar-photovoltaic arrays for 100% autonomous freshwater supply.
Thermal & Green Energy Plants
High-capacity coastal power generation plants require continuous boiler make-up water. Tongjie combines ocean SWRO with secondary pass RO and Electrodeionization (EDI) systems delivering resistivity >16-18 MΩ·cm.
Offshore Platforms & Marine
Skid-mounted compact systems designed according to marine offshore specifications, vibration dampening frameworks, explosion-proof control modules (ATEX/IECEx), and compact footprints for drill rigs.
Global Compliance, Quality Frameworks & Field Support
Shanghai Tongjie operates an integrated manufacturing ecosystem ensuring documentation transparency and zero field surprises.
Full Regulatory Compliance
All process equipment carries CE conformity for the European Union market and is fabricated in strict adherence to ISO 9001 (Quality), ISO 14001 (Environment), and ISO 45001 (Health & Safety) frameworks. Full material test reports (MTR) and weld traceability maps are delivered with every skid.
100% Factory Acceptance Testing (FAT)
Every SWRO and DTRO train undergoes hydraulic hydrostatic testing, electrical insulation checks, sensor calibration, and full PLC automation loop checks at our Shanghai production base prior to crating, reducing site start-up risks to near zero.
SCADA & Cloud Lifecycle Telemetry
Equipped with Siemens or Allen-Bradley PLCs and encrypted IoT cloud gateways, our technical team provides remote start-up guidance, operational optimization, membrane fouling diagnostics, and preventive maintenance alerts across all global installations.
Engineering Questions Answered by Technical Specialists
Clear engineering and commercial responses to critical factors evaluated by global procurement directors and EPC plant managers.
What parameters are required to size an industrial ocean desalination plant precisely?
How does Tongjie manage high boron levels typically found in seawater?
What are the key differences between standard SWRO and Disc Tube Reverse Osmosis (DTRO)?
How fast can Tongjie containerized seawater desalination units be commissioned on-site?
Do you offer OEM, ODM, and customized white-label manufacturing for overseas equipment distributors?
High-Pressure DTRO, Ultra-Pure Water & Zero Liquid Discharge Plants
Engineered for oil & gas produced water, microelectronics fabrication, and severe industrial wastewater applications.
Initiate Your Desalination Engineering Proposal
Send raw seawater test data, target capacities, and regional site standards. Our senior process engineering team responds with complete P&ID calculations and mass-balance flow sheets within 24 business hours.