Flash Distillation Drum Sizing
Sizing of vertical or horizontal flash distillation drums based on the vapor-velocity method to determine minimum diameter, length, and actual vapor velocity.
📖 Need the theory? Read the methodology, assumptions, and equations in the full reference guide.
1. Define Input Parameters
2. Engineering Output
Vapor Volumetric Flow Rate (SI) (Q_v_s)
- m³/s
- m³/s
Minimum Cross-Sectional Area (A_min)
- m²
- m²
Calculated Internal Drum Diameter (D_calc)
- m
- m
Tangent-to-Tangent Length (L)
- m
- m
Actual Cross-Sectional Area (A_actual)
- m²
- m²
Actual Vapor Velocity (U_actual)
- m/s
- m/s
Need this calculation offline?
Download Offline Excel CalculationContext & Assumptions
Flash distillation drums are critical phase-separation vessels used to separate saturated liquid streams into vapor and liquid phases. Proper sizing prevents liquid carry-over and downstream equipment damage by maintaining vapor velocities below entrainment limits. This calculator uses the classical vapor-velocity method to determine the minimum required diameter and vessel length based on flow rates and design constraints.
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The results provided by this tool are for educational and preliminary estimation purposes only.
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All results MUST be independently verified by a qualified professional engineer before implementation in any industrial or physical environment.