Refinery & Oil Depot
A Shandong New Energy Co., Ltd.
Diesel Refining & Quality Control
Key outcomes
- Clear and Transparent Finished Fuel: Effectively improves the visual transparency of finished fuel, enhancing product market competitiveness
- Effective Interception of Fine Gums: Significantly reduces product grade downgrade issues caused by fine gums
- High-Flow Processing Capacity: 40m³/h high-flow circulation design, meeting the high turnover demands of refineries/warehousing
Case Study
Stage 1 · Customer Problem
📋 Customer Problem
A Shandong New Energy Co., Ltd. is a petrochemical enterprise focused on finished fuel refining and clean energy development. As a production-oriented unit with higher quality requirements, the customer is dedicated to supplying high-standard pure diesel to the market, with products widely used in high-precision industrial equipment and high-end transport markets. During diesel production and storage, the customer encountered technical bottlenecks affecting brand reputation:
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Fine Gum Exceedance
Fine gums that are difficult to detect with the naked eye but cause slight fuel cloudiness appear in finished diesel. Usually caused by fuel oxidation or process residues, this directly affects the fuel quality rating.
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Premium Pricing Hindered
Against the backdrop of pursuing high-standard quality control, trace impurities and gums put the customer at a disadvantage in high-end bidding, or even face price reduction demands.
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Traditional Filtration Limits
Standard mechanical filtration struggles to intercept gums and oxidized resins with smaller molecular weights or suspended states, and cannot fundamentally achieve fuel "transparency."
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Large-Scale Turnover Pressure
Due to large shipment volumes, the purification process cannot become a logistics bottleneck and must support 40m³/h high-speed operation.
Stage 2 · Fuel Analysis · NEW
🔬 Fuel Analysis
Fuel sampling of finished diesel revealed contamination dominated by oxidized resins and trace colloidal gums that mechanical filtration could not remove:
| Metric | Before Treatment | After Treatment | Improvement |
|---|
| ISO 4406 Cleanliness | ~20/18/15 | 14/12/9 | 3 levels ↑ |
| Free Water (ppm) | ~150 | ≤50 | 67% ↓ |
| Visual Appearance | Slightly cloudy (gum haze) | Clear, transparent | — |
| TAN (mgKOH/g) | 0.20 | 0.08 | 60% ↓ |
| Particle Composition | Oxidized resins, fine gums, suspended colloids | ≥98% removed at ≥5 μm | 98% ↓ |
Values are representative based on site conditions (refinery finished-diesel storage, oxidation- and process-residue-driven gum formation). Field testing confirmed the "deep polishing" effect — trace gums and oxidized resins intercepted so that physicochemical indicators exceed industry standards.
Stage 3 · Solution
🛠️ Solution & System Configuration
Jingyuan deployed a refining-grade purification system for the new energy company. Selection logic: the polymer rigid composite membrane's strong capture capability for oxidized resins and micron-level gums achieves a true "deep polishing" effect, while the storage tank bypass circulation mode continuously improves in-tank fuel quality even when not loading.
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
Installation
Storage tank bypass circulation
Key design decisions: The Jingyuan® polymer rigid composite membrane leverages oleophilic-hydrophobic properties to efficiently intercept particulate impurities while synergistically removing trace free water, achieving a "deep polishing" effect that ensures fuel is clear, transparent, and meets cleanliness standards. The bypass circulation mode continuously polishes in-tank fuel, and differential-pressure alarm automation keeps filtration precision and flow rate at an optimal balance point under high-load operation.
Stage 4 · Results
📈 Quantified Results
40 m³/h
High-Flow Capacity
| Metric | Before | After | Improvement |
|---|
| Visual Appearance | Slightly cloudy (gum haze) | Clear and transparent | — |
| Fine Gum Content | Trace exceedance | Below detection limit | Resolved |
| Physicochemical Indicators | Marginal | Exceeds industry standards | — |
| High-End Order Wins | Limited / disadvantaged | Expanded | — |
| Annual Consumable Cost | ~¥36,000 | ¥0 | 100% ↓ |
By introducing the Jingyuan 40m³/h purification system, the customer effectively resolved the long-standing gum issue. The diesel purified through the system is visually clear and transparent, with physicochemical indicators better than industry standards. This quality improvement not only won the customer more high-end orders but also reduced chemical additive usage through physical means, achieving a win-win of economic benefits and environmental reputation.
Stage 5 · Lessons Learned · NEW
💡 Lessons Learned
✅
Key Success Factor
The "deep polishing" approach was the critical decision. The polymer rigid composite membrane's strong capture capability for oxidized resins and micron-level gums achieves true fuel transparency that standard mechanical filtration fundamentally cannot — this is what unlocked premium-grade clarity for high-end markets.
⚠️
Common Pitfall
Relying on standard mechanical filtration for gum removal fails because gums and oxidized resins have smaller molecular weights or exist in suspended states that pass through conventional media. Treating only visible particulates while ignoring colloidal haze leaves the product at a disadvantage in high-end bidding.
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Replication Advice
Directly applicable to refineries and new-energy fuel producers pursuing premium-grade clarity for high-end industrial and transport markets. The storage tank bypass circulation mode is especially valuable: it continuously improves in-tank fuel quality even when not loading, so purification never becomes a logistics bottleneck.
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Customer feedback
In the new energy industry, clarity equates to quality. The fine gums in our diesel used to be a technical challenge until we installed Jingyuan's 40m³/h system. It provides the final "polishing" our products need. Now our diesel is clear and transparent, able to meet high-end market requirements.
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