Featured Industrial Water & Desalination Systems
Pre-engineered, modularized, and skid-mounted reverse osmosis and pure water systems manufactured under ISO & CE standard compliance.
Solar-Coupled SWRO: The Industrial Decarbonization Paradigm
Decentralized marine water transformation requires deep technological convergence between solar photovoltaic (PV) generation, energy recovery devices (ERD), and variable-frequency membrane process management.
Photovoltaic Intermittency Management
Direct integration of solar arrays with Seawater Reverse Osmosis traditionally faces membrane fouling risks from pressure drops during solar intermittency. Tongjie systems utilize smart variable frequency drives (VFD) and buffer storage, ensuring isobaric energy recovery and linear ramp-downs that preserve thin-film composite membrane integrity.
Isobaric Energy Recovery Integration
By pairing positive displacement high-pressure pumps with rotary isobaric pressure exchangers, our CE-certified solar desalination plants capture up to 96% of the hydraulic reject energy from high-salinity brine streams, slashing specific energy consumption (SEC) down to less than 2.5 - 3.0 kWh per cubic meter of clean permeate.
Advanced Anti-Corrosive Metallurgy
Solar maritime environments accelerate chloride-induced corrosion. Tongjie builds with Super Duplex Stainless Steel (2507 / UNS S32750) and high-grade 904L alloys across all high-pressure manifolds, coupled with specialized glass-reinforced epoxy (GRP) pressure vessels rated to 1,200 PSI for 20+ year plant service lifetimes.
Localized Application Scenarios for Solar Desalination
From remote island resorts in Southeast Asia to hyper-arid coastal industrial parks across the GCC, containerized solar SWRO delivers zero-carbon potable and process water.
Off-Grid Islands & Eco-Tourism
Small-island developing states face exorbitant diesel-generation costs and fragile freshwater lenses. Our containerized solar SWRO solutions operate completely islanded with dedicated lithium iron phosphate (LiFePO4) storage or DC-bus direct-drive architecture, supplying pristine drinking water conforming strictly to WHO guidelines without acoustic or particulate pollution.
Coastal Mining & Heavy Industry
Extractive facilities and chemical terminals in coastal deserts often lack thermal grid capacity. Tongjie deploys high-volume SWRO container batteries generating process boiler feedwater (< 0.1 µS/cm) and high-purity utility water, lowering operational reliance on local municipal infrastructure and insulating project economics from water tariffs.
Agricultural Irrigation & Saline Greenhouses
High boron and sodium levels severely damage cash crops. Our double-pass SWRO systems optimize stage-recovery ratios to reduce boron below 0.3 mg/L, transforming Arabian Gulf feedwaters (45,000+ ppm TDS) into mineral-balanced irrigation feeds for hydroponic and controlled-environment agricultural complexes.
Engineering Architecture & Lifecycle Efficiency Metrics
A detailed multi-parameter review demonstrating why pressurized membrane separation coupled with solar power displaces legacy thermal evaporation (MSF/MED).
| Performance Indicator | Tongjie Solar-Powered SWRO | Multi-Stage Flash (MSF) Thermal | Standard Grid-Tied RO Plant |
|---|---|---|---|
| Primary Energy Carrier | Solar PV (Direct DC / AC Coupled) | Fossil Fuel Cogeneration Steam | Conventional Grid Electrical Power |
| Specific Energy Consumption | 2.2 - 3.2 kWh/m³ (permeate) | 12.0 - 18.0 kWh/m³ (equivalent) | 3.5 - 4.5 kWh/m³ |
| Carbon Footprint (Scope 1 & 2) | Near-Zero Net Operational Emissions | Extremely High (10-25 kg CO2/m³) | Subject to Grid Carbon Intensity |
| Deployment Footprint | Compact ISO Intermodal Containers | Massive Civil Engineering Footprint | Dedicated Industrial Building Required |
| Modularity & Scalability | Plug-and-Play (50 to 5,000 m³/day) | Rigid Monolithic Structures | Semi-Modular Skid Assemblies |
| Levelized Cost of Water (LCOW) | $0.48 - $0.75 / m³ | $1.40 - $2.20 / m³ | $0.80 - $1.20 / m³ |
China Supply Chain Resilience & Shanghai Production Precision
Located in Jiading District, Shanghai, our smart manufacturing facility unifies precision machining, automated orbital welding, assembly, and rigorous Factory Acceptance Testing (FAT).
Complete Vertical Integration
By producing pressure vessel racks, control consoles, dosing stations, and pre-filtration housings in-house, Tongjie eliminates middle-tier fabrication markups. We guarantee tight production timelines of 4 to 8 weeks for standard containerized plants, insulated from global logistics shocks.
Exhaustive Hydraulic FAT
Every skid and container is subjected to continuous 72-hour pressure, hydrostatic leak, and automated PLC simulated fault tests with raw water testing loops before sea-freight packing. When our skids arrive at your coastal site, connection-to-production time is cut from months to days.
Proprietary AI SCADA Software
Backed by over 38 proprietary invention patents and software copyrights, our control panels integrate edge computing algorithms that monitor membrane permeability decline, calculate real-time fouling indices, and initiate automated low-pressure flush routines during solar irradiance lulls.
CE Certified Assurance & Localized Regulatory Support
Navigating coastal water treatment requires rigorous compliance with environmental, pressure equipment, and electrical safety standards worldwide.
Full CE Directive Alignment
Our plants are engineered and certified under the European Pressure Equipment Directive (PED 2014/68/EU), Machinery Directive (2006/42/EC), and Low Voltage Directive (LVD 2014/35/EU). We provide exhaustive Technical Construction Files (TCF) for effortless European or international authority permitting.
Marine Brine Outfall Design
Sustainable desalination demands minimal ecological impact. Tongjie provides complete environmental dispersion modeling and multiport diffuser discharge sub-assemblies that eliminate thermal pollution and rapidly dilute concentrate streams back to ambient background salinity levels.
Worldwide Field Engineering Support
From site survey analysis to on-site commissioning supervision, Tongjie’s multilingual field engineering personnel deploy across Central Asia, the Middle East, Southeast Asia, and Africa. We offer localized spares warehousing, remote SCADA telemetry assistance, and tailored O&M operator training.
Frequently Answered Engineering Questions
High-density technical guidance for EPC contractors, industrial procurement directors, and plant managers specifying seawater desalination systems.
What parameters are necessary to receive an engineered process proposal and equipment quote?
- Comprehensive Raw Water Analysis: TDS (Total Dissolved Solids), chloride, sulfate, boron, silica, total hardness, temperature envelope, SDI (Silt Density Index), and TSS/turbidity.
- Target Permeate Output: Daily volumetric flow rate (m³/day or GPD) and required water quality standards (WHO drinking water, USP pharmaceutical pure water, or low-conductivity boiler feed).
- Site Utilities & Infrastructure: Available solar array plot area, electrical grid availability, or battery storage specifications.
How does solar desalination handle periods of cloud cover and night-time operation?
- Direct Solar Coupling with Intermittent Operation: The plant runs purely during peak daylight hours. Automated high-purity permeate flush cycles clear membrane housings during shutdown, preventing biofouling and scaling without needing battery storage.
- Hybrid PV-Grid / PV-Diesel System: The plant operates 24/7, smoothly shifting power consumption to the PV field during sunny periods and seamlessly transitioning to external sources at night or during overcast conditions.
- Full Off-Grid Solar + BESS: Integrated Lithium Iron Phosphate (LiFePO4) storage banks provide a steady DC baseline, supporting continuous round-the-clock water generation on isolated islands.
What anti-corrosive materials are specified for high-salinity seawater applications?
- High-Pressure Circuit: Super Duplex Stainless Steel 2507 (UNS S32750) or 1.4410, with high Pitting Resistance Equivalent Number (PREN > 42).
- Membrane Housings: Glass-Fiber Reinforced Polymer (FRP/GRP) rated up to 1,000 or 1,200 PSI, equipped with ASME Section X design rules.
- Low-Pressure Pretreatment Circuit: High-grade UPVC, CPVC, or polypropylene piping to minimize weight and eliminate corrosion risk.
What certifications and manufacturing standards govern Tongjie factory products?
What are the lead times for containerized seawater reverse osmosis plants?
Specialized Wastewater, Desalination & Pure Water Equipment
Turnkey modular units designed for rapid global deployment, severe high-salinity challenges, and specialized industrial manufacturing processes.
