Featured Industrial Separation & Brine Units
Pre-engineered skid modules and custom containerized configurations built directly in our ISO-certified facilities under strict FAT factory-testing regimes.
Industrial Brine Treatment & ZLD: Process Engineering Paradigm
Navigating the thermodynamics of high osmotic pressures, aggressive scaling chemistry, and energy consumption limits in modern zero-liquid-discharge infrastructure.
Thermodynamic & Osmotic Limits
Industrial brine effluent routinely exceeds 35,000 mg/L to 180,000 mg/L Total Dissolved Solids (TDS). Standard spiral-wound polymeric reverse osmosis elements reach operational limits at approximately 70-80 bar due to membrane compaction and feed-spacer blinding. Handling elevated osmotic pressures requires multi-stage high-pressure DTRO (Disc Tube Reverse Osmosis) running up to 160 bar, balancing hydraulic flux while mitigating concentration polarization.
Advanced Antiscaling & Pre-Treatment
Scaling species—primarily CaSO4, BaSO4, SrSO4, and reactive silica (SiO2)—dictate recovery bounds. Tongjie engineering integrates comprehensive chemical softening (lime-soda, caustic softening) followed by high-shear tubular ultrafiltration (TUF) or media filtering. By suppressing hardness to <20 mg/L as CaCO3 and silica to <10 mg/L, downstream membrane units safely operate at high recovery without irreversible fouling.
Thermal MVR Crystallization Coupling
At TDS levels where mechanical membrane concentration is no longer cost-effective (>130,000 to 160,000 mg/L), mechanical vapor recompression (MVR) falling-film evaporators take over. Steam recompression recovers latent heat, driving electrical consumption down to 25–45 kWh/m³. The concentrate is fed to forced-circulation crystallizers, producing dry salt solids ready for landfill or industrial fractional re-sale (NaCl, Na2SO4).
The Strategic Edge of Sourcing OEM Brine Treatment Systems From China
How deep supply clusters, advanced metallurgic capabilities, and rapid modular prefabrication give global EPC buyers an unmatched project delivery timeline.
Fully Integrated Metallurgy Cluster
Brine applications demand anti-corrosive alloys: Duplex 2205, Super Duplex 2507, Hastelloy C-276, and Grade 2 Titanium. China’s advanced supply ecosystems near Shanghai yield accelerated procuring of specialized metallurgy and automated orbital welding certification, slashing fabrication schedules by up to 40% compared to European or North American skid builders.
Stringent Multi-Standard QA/QC
Tongjie maintains ISO 9001, ISO 14001, ISO 45001, and European CE compliance. Pressure vessels are engineered to ASME Section X / Section VIII standards or certified GB standards. Full hydro-testing, X-ray weld inspection, helium leak assessments, and electrical FAT running tests are conducted under one roof prior to crating.
Skid-Mounted & Container Pre-commissioning
Rather than shipping knocked-down kits that require complex field assembly, Tongjie modularizes brine systems inside high-cube CSC-certified shipping containers or structural steel skids. Interconnecting piping, automated air-actuated valves, SCADA instrumentation, and variable-frequency drives (VFDs) arrive pre-wired and factory-tested, shortening on-site commissioning to under 15 days.
Engineered Brine Systems Across Diverse Industrial Sectors
Tailoring recovery stages to the exact geochemical profile of waste fluid matrices to maintain continuous production and environmental license to operate.
Oil & Gas Produced Fluid Reuse
Shale play hydraulic fracturing flowback and produced formation waters feature variable TDS (30,000 to 150,000 mg/L) alongside free/dissolved hydrocarbons and barium/strontium cations. Tongjie's containerized DTRO and softening units purify wastewater to reinjection thresholds (oil ≤5 mg/L, SS ≤1 mg/L), mitigating deep-well disposal strain in regions like Kazakhstan and the Middle East.
Coal-to-Chemical & Petrochemical ZLD
Petrochemical refining and coal gasification discharge massive volumes of high-chloride, high-COD blowdown water. Through staged catalytic ozonation, ultrafiltration, high-pressure RO concentration, and multi-effect MVR evaporation, Tongjie closed-loop plants turn recalcitrant wastewater into pure industrial distillate and segregated dry crystalline salts.
Lithium Extraction & Battery Materials
Hydrometallurgical battery-grade lithium refining produces sodium sulfate and lithium-bearing mother liquors. Our nanofiltration (NF) membrane systems selectively fractionate monovalent from divalent ions, enabling selective crystallization, salt harvesting, and closed-loop process water recirculating that significantly lowers battery manufacturing footprint.
Seawater Desalination Concentrates
High-capacity SWRO plants face stringent environmental regulations regarding the return of dense brine back into marine biomes. Tongjie provides secondary concentration skids that upgrade standard SWRO reject (65,000 mg/L) into feedstock for chlor-alkali production facilities or integrated mineral harvesting processes.
Brine Concentration Process Train Benchmark
Comparing operational boundaries, operating cost components, and concentration limits across primary membrane and thermal technologies.
| Technology System | Feed Salinity Envelope | Maximum Recovery | Energy Index (kWh/m³) | Primary Limiting Factor | Primary Industrial Fit |
|---|---|---|---|---|---|
| Spiral-Wound Brackish/Seawater RO | 1,000 – 45,000 mg/L | 50% – 75% | 1.8 – 3.5 | Osmotic pressure cut-off (80 bar max) | Desalination, Primary Wastewater |
| Disc Tube RO (DTRO / STRO) | 35,000 – 140,000 mg/L | 70% – 85% | 6.0 – 14.0 | Hydraulic pressure limit (up to 160 bar) | Landfill Leachate, Flowback, Mining Brine |
| Electrodialysis Reversal (EDR) | 10,000 – 100,000 mg/L | 75% – 90% | 8.0 – 16.0 | Non-ionic species / organic foulants | Inorganic Salt Separation, Cooling Blowdown |
| MVR Evaporation & Crystallization | 100,000 – 300,000 mg/L | 95% – 99% | 28.0 – 50.0 | Boiling point elevation, metallurgy wear | Complete ZLD, Hazardous Sludge Prevention |
Industrial Demineralized, DTRO & Membrane Plants
Standardized models and tailor-engineered platforms available for turnkey export and rapid global integration.
Frequently Asked Questions
Detailed technical clarifications for engineering teams, project directors, and procurement specialists.