Refinery & Oil Depot
A Liaoning Port Oil Depot
Port Logistics Fuel Quality Control
Key outcomes
- Marine-Grade Anti-Corrosion Design: Customized anti-corrosion design for the high-salt-spray environment of seaports, ensuring long equipment life
- Clear and Transparent Fuel: Effectively ensures clear and transparent dispatched fuel appearance under high-humidity coastal conditions
- Efficient Loading Capability: 60m³/h high flow, matching the high-efficiency logistics throughput rhythm of the port
Case Study
Stage 1 · Customer Problem
📋 Customer Problem
A Liaoning Port Oil Depot is a large-scale grain and oil transit logistics base in the region, and also a core import and export port in Northeast China. Its associated oil depot undertakes a relatively large finished fuel transfer task, distributing diesel to inland areas or loading it onto ships for export through sea-land intermodal transport, with high requirements for logistics efficiency and fuel quality. The seaside port oil depot faces unique environmental challenges:
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Salt Spray Corrosion
Standard carbon steel filtration equipment is highly prone to rusting in seaport conditions, causing equipment housing corrosion and spalling, and even secondary contamination of the fuel.
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Tank Bottom Sediment
The large day-night temperature difference and high air humidity at the seaside cause storage tanks to generate sediment and trace free water at the bottom during long-term operation, affecting dispatched fuel appearance.
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High-Intensity Throughput
As a logistics hub, the depot has a large shipping volume, requiring filtration equipment to operate continuously at 60m³/h high flow rate, without interruptions from frequent cartridge blockage.
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Strict Downstream Requirements
Downstream logistics fleets and ship users are relatively sensitive to fuel appearance. Cloudiness or sediment will trigger rejection or complaints.
Stage 2 · Fuel Analysis · NEW
🔬 Fuel Analysis
Fuel sampling at the port loading points revealed contamination from sea-land intermodal transfer, tank-bottom sediment, and salt-spray-driven corrosion of standard equipment:
| Metric | Before Treatment | After Treatment | Improvement |
|---|
| ISO 4406 Cleanliness | ~22/20/17 | 14/12/9 | 3 levels ↑ |
| Free Water (ppm) | ~200 | ≤50 | 75% ↓ |
| Visual Appearance | Cloudy with sediment | Clear, transparent | — |
| TAN (mgKOH/g) | 0.16 | 0.08 | 50% ↓ |
| Particle Composition | Rust, salt-crystal debris, tank sediment | ≥98% removed at ≥5 μm | 98% ↓ |
Values are representative based on site conditions (Liaoning seaport, high-humidity coastal environment, sea-land intermodal transfer of diesel). Field testing confirmed visual clarity improvement and compliance with downstream fleet and ship-user acceptance standards.
Stage 3 · Solution
🛠️ Solution & System Configuration
Jingyuan provided the port with a "seaport dedicated version" 60m³/h purification solution. Selection logic: the 60m³/h flow rate matches the high-efficiency logistics throughput rhythm of the port, while the marine-grade anti-corrosion architecture ensures long equipment life in the high-salt-spray seaport environment.
Model
JY-DX60 (Seaport Version)
Membrane
Polymer Rigid Composite, 5 μm nominal
β Value
≥200 at rated pore size
Operating Pressure
0.2–0.4 MPa
Regeneration
Gas-pulse regeneration (brief 5-15 min safety pause)
Explosion-Proof
Ex d IIB T4
Anti-Corrosion
Zinc-rich epoxy primer + PU topcoat, 316L stainless steel
Key design decisions: The equipment housing uses a special zinc-rich epoxy primer and polyurethane topcoat multi-layer protection process, with key piping and valves upgraded to 316L stainless steel to resist salt spray erosion. The Jingyuan® polymer rigid composite membrane leverages oleophilic-hydrophobic properties to efficiently intercept particulate impurities while synergistically removing trace free water. An optimized flow-channel design ensures relatively low internal pressure drop during 60m³/h full-load operation, and structural components are reinforced to withstand vibration and harsh port operating conditions.
Stage 4 · Results
📈 Quantified Results
60 m³/h
High-Flow Capacity
| Metric | Before | After | Improvement |
|---|
| Visual Appearance | Cloudy with sediment | Clear and transparent | — |
| ISO 4406 Cleanliness | ~22/20/17 | 14/12/9 | 3 levels ↑ |
| Equipment Corrosion | Severe rust / spalling | Intact after sea-wind exposure | — |
| Cartridge Blockage Downtime | Frequent interruptions | 0 | 100% eliminated |
| Annual Consumable Cost | ~¥54,000 | ¥0 | 100% ↓ |
The system's deployment effectively resolved the fuel appearance issues that had troubled the port oil depot. Even in high-humidity weather, diesel treated through the 60m³/h system maintained its clear and transparent appearance. The equipment's anti-corrosion performance has withstood the test of sea winds, with the exterior remaining intact to date. This not only ensures efficient port logistics operations but also establishes a good reputation for the customer's fuel transit quality.
Stage 5 · Lessons Learned · NEW
💡 Lessons Learned
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Key Success Factor
The marine-grade anti-corrosion architecture was the critical decision. The zinc-rich epoxy primer + polyurethane topcoat multi-layer process and 316L stainless steel piping/valves resist salt-spray erosion. Without this package, standard carbon-steel equipment would rapidly rust and re-contaminate the very fuel it was meant to clean.
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Common Pitfall
Deploying standard carbon-steel filtration equipment in seaports is self-defeating: the housing rusts and spalls, introducing secondary contamination (rust, salt-crystal debris) worse than the original sediment problem. Solving particulates while ignoring the corrosive environment simply relocates the contamination source into the equipment itself.
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Replication Advice
Directly applicable to coastal port oil depots and sea-land intermodal transfer hubs where high humidity, salt spray, and large day-night temperature swings coexist. For depots requiring higher throughput, multiple JY-DX60 seaport-version units can be deployed in parallel with synchronized group-switching regeneration.
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Customer feedback
Operating an oil depot by the sea means a protracted battle against moisture and salt. Jingyuan's customized 60m³/h units are robust and durable, withstanding the harsh port environment, effectively ensuring the cleanliness of dispatched diesel. It is our reliable gatekeeper for port logistics.
Refinery & Oil Depot
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