Diesel Bund Drainage System: Functional Mechanisms
The drainage system of a tank diesel bund operates through a carefully designed framework to balance spill containment with environmental protection. Here's a detailed breakdown of its functional mechanisms:
Primary Containment and Drainage Design
The bund's floor is sloped toward a central drain or collection sump to channel any spilled diesel efficiently. The slope (typically 1–2% gradient) ensures liquid flows naturally toward the drain, preventing pooling.
Flow Control Mechanisms
Oil-Water Separation Process
Any drained diesel must pass through an oil-water separator to comply with environmental regulations. These systems use:
- Gravity separation: Diesel (less dense) floats to the top
- Coalescence: Small droplets combine for easier separation
- Filtration: Final polishing of the water phase
- Collection: Separated diesel is recovered for reuse
- Discharge: Treated water meets quality standards
System Configurations
Closed-Loop Systems: Route drained diesel directly to a recovery tank (common in industrial settings).
Regulated Open Systems: Connect to controlled discharge points after treatment, requiring strict monitoring.