Featured Installations
Precision High-Salinity & Ultrapure Treatment Skids
Standardized modular configurations deployed for heavy industrial processing, petrochemical refining, and ultra-deep demineralization.
Regional Market Dynamics
The Chicago Hub: Downstream Refining & Water Management Pressures
The greater Chicago Metropolitan Area and the Calumet industrial corridor represent one of North America's dense petroleum refining, chemicals manufacturing, and logistics crossroads.
Stringent Regional Discharge Permits
Discharges bordering the Lake Michigan basin and the Illinois River waterway are subject to severe NPDES limits on total dissolved solids (TDS), heavy polycyclic aromatic hydrocarbons (PAHs), chlorides, and phenols. Facilities require tertiary membrane loops with zero margin for operational downtime.
Refining Capacity & Produced Water Influx
The Whiting refinery network and regional pipeline terminuses process heavy Canadian crude oils and Bakken shale intermediates. The resulting complex produced and process water carries emulsion-bound hydrocarbons, high silica concentrations, and scaling barium/strontium ions.
CE Conformity as Global Standard
Chicago EPC firms operating international engineering subsidiaries demand machinery certified under the European Machinery Directive (2006/42/EC) and Pressure Equipment Directive (2014/68/EU). CE marking represents a recognized benchmark of design validation and pressure safety.
≤5 mg/L
Reinjection Free Oil Limit
≤1 mg/L
Suspended Solids Guarantee
160 Bar
DTRO Rated Membrane Pressure
15 Days
Plug-and-Play Commissioning
Supply Chain Strategy
China Factory 4.0: Cost Reductions & Engineering Resilience
Procuring high-salinity separation and water recovery systems directly from ISO/CE-certified Chinese original equipment manufacturers delivers critical CAPEX and schedule advantages.
Automated Manufacturing & High-Alloy Integrity
The production of produced water filtration infrastructure requires high-spec metallurgical metallurgy—including Super Duplex Stainless Steel (2507), Hastelloy C-276, and titanium components to withstand raw chloride concentrations exceeding 80,000 mg/L. Our factory applies automated robotic orbital welding and non-destructive radiographic testing on all pressure manifolds, fully aligned with ASME Section VIII and European EN 13445 codes.
- Total Skid Prefabrication: High-pressure pumps, energy recovery devices, chemical CIP stations, and PLC enclosures are pre-wired and hydrostatically tested before container dispatch.
- Cost Rationalization (35–45% CAPEX Savings): Complete vertical integration—from pressure vessel winding to automated CNC rack manufacturing—eliminates multi-tier markup layers.
- Pre-Validated Compliance Packages: FAT documentation, material test reports (EN 10204 3.1), and CE Declaration of Conformity ready for North American plant audits.
| Engineering Parameter | Standard Market Solution | Tongjie Engineered Solution |
|---|---|---|
| Membrane Topology | Spiral Wound RO (Prone to fouling) | Open-Channel DTRO (Tolerates SDI > 5) |
| Oil & Grease Tolerance | < 0.5 mg/L upstream limit | Up to 25 mg/L continuous with DAF + Coalescence |
| Automation Standard | Basic Relay / Semi-Manual CIP | Siemens/Allen-Bradley PLC + Remote Telemetry |
| Operating Pressure Limits | Max 70–80 bar | High-Pressure Series up to 120–160 bar |
| Certifications | Regional / Self-certified | Full CE Machinery / PED + ISO 9001/14001/45001 |
Facing High Water Hauling or Strict Discharge Limits?
Send our process team your water analysis report (TDS, Chlorides, TOC, Silica, Hardness). We return an engineered process mass balance and equipment skid layout within 48 hours.
Engineered Process Flow
Five-Stage Reclamation Architecture for Produced & Industrial Water
From raw wastewater equalization to solid salt discharge, each unit operation is mechanically matched to maximize membrane life and minimize total operating cost per barrel treated.
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1. Primary De-Oiling & Coagulation
Utilizes induced gas flotation (IGF), micro-bubble dissolved air flotation (DAF), and coalescing walnut shell media filtration to bring free and emulsified oil levels down from 2,000 mg/L to under 5 mg/L.
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2. High-Efficiency Chemical Softening
Dual-stage lime-soda softening combined with tubular microfiltration (TMF) to drop calcium, magnesium, barium, and soluble silica down to non-scaling levels, protecting subsequent membrane operations.
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3. Ultrafiltration & Organic Scavenging
Hollow-fiber or ceramic ultrafiltration skids remove all colloidal silt density (SDI < 2.5), paired with specialized non-regenerative or caustic-regenerated resin beds to strip persistent complex organics.
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4. DTRO (Disc Tube Reverse Osmosis)
Specially spaced disc cushions resist particulate clogging. Operates at pressures up to 160 bar, driving TDS concentration past 120,000 ppm while generating pure permeate water for boiler or reinjection reuse.
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5. MVR Evaporation & Crystallization
Mechanical Vapor Recompression drives the saturated brine into dry crystalline solids (mixed sodium chloride/sulfate cake), achieving complete Zero Liquid Discharge (ZLD) compliance.
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6. SCADA Telemetry & Remote Cloud Support
Fully compliant with industrial cybersecurity standards. Automated sensors report transmembrane pressure, conductivity, and flow differentials directly to plant engineers and our monitoring engineers.
Comprehensive Equipment Inventory
Specialized Modular Treatment Skids Available for Chicago & Global Delivery
Factory-acceptance tested systems engineered for heavy energy extraction, pharmaceutical formulation, and specialized industrial process water purification.
Engineering & Purchasing Clarifications
Frequently Asked Questions for Industrial Procurement Teams
Direct answers addressing technical configurations, CE certification compliance, international shipping logistics, and commissioning support.
Why is CE certification required for oil & gas produced water equipment entering the Chicago market?
While the United States primarily enforces OSHA and ASME regulations domestically, multi-national EPC firms and oilfield service companies headquartered in or operating through Chicago specify CE certification (Pressure Equipment Directive 2014/68/EU and Machinery Directive 2006/42/EC) because it enforces unified mechanical risk assessments, high-integrity pressure boundary calculations, and standardized electrical safety compliance. CE marking also allows global assets to be redeployed overseas to European, Middle Eastern, or Latin American production sites without re-engineering or recertification hurdles.
How do Tongjie systems solve membrane fouling caused by high hydrocarbon and silica concentrations?
Conventional spiral-wound RO membranes fail rapidly under oilfield conditions because feed spacers trap free hydrocarbons and suspended solids, forming irreversible bio-slimes and mineral scale. We integrate open-channel Disc Tube Reverse Osmosis (DTRO) technology. In DTRO configurations, hydraulic flow paths across circular membrane cushions prevent dead zones, allowing feed water with turbidity SDI values > 5 and free oil levels up to 25 mg/L to pass through without plugging. Additionally, upstream chemical softening with tubular microfiltration (TMF) precipitates reactive silica down to sub-15 mg/L before it reaches high-pressure stages.
What documentation is provided to satisfy US/Midwest environmental regulators?
Every custom water treatment skid is supplied with a comprehensive engineering verification dossier: Complete Piping and Instrumentation Diagrams (P&ID), mass and energy balance calculations, 3D general arrangement drawings, Factory Acceptance Test (FAT) logs, non-destructive weld testing (NDT/RT) records, hydrostatic test certificates, electrical schematics compliant with UL 508A / IEC 60204, and detailed chemical cleaning / maintenance SOPs. This data provides industrial owners with turnkey backing when submitting NPDES permit modifications to the Illinois EPA or municipal sanitary districts.
What is the delivery timeline from order confirmation to arrival at Midwestern sites?
Because our Shanghai production facility retains high-alloy steel stock, automated frame welding, and standard membrane inventory under one roof, fabrication typically completes in 8 to 12 weeks depending on system scale and metallurgy. Sea freight to West Coast ports or directly through the St. Lawrence Seaway / rail intermodal transfers into Chicago hub logistics terminals typically takes 22 to 30 days. Standard containerized skids are delivered fully pre-commissioned, reducing on-site tie-in and start-up time to approximately 10 to 15 business days.
Can the skid controls interface with local distributed control systems (DCS)?
Yes. All control panels are engineered with industry-standard programmable logic controllers (Siemens S7-1500 or Allen-Bradley ControlLogix platforms). Communications can be configured for Modbus TCP/IP, Ethernet/IP, or Profinet protocols, permitting bidirectional telemetry, remote shutdown interlocking, and continuous operational logging into your plant's existing central control room.
Procure Certified, Industrial-Grade Water Equipment Directly from the Source
Partner with an established manufacturer offering 38+ national patents, full CE certification, and the supply chain resilience needed to lower your industrial effluent treatment costs.
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