Typical tray efficiencies, packing characteristics, and heat transfer coefficients for process equipment.
| Service | Tray Type | Efficiency (%) | Comments |
|---|---|---|---|
| Demethanizer | Valve | 30-40 | Low temp, high pressure |
| Deethanizer | Valve | 60-70 | Moderate conditions |
| Depropanizer | Valve | 70-80 | Good conditions |
| Debutanizer | Valve | 75-85 | Near atmospheric |
| Amine Absorber | Valve/Bubble | 25-35 | Mass transfer limited |
| Amine Regenerator | Valve | 60-70 | Steam stripping |
| TEG Contactor | Bubble Cap | 25-35 | High viscosity |
| Stabilizer | Valve | 70-80 | Moderate pressure |
| Type | Size | HETP (ft) | Pressure Drop (in H₂O/ft) | Surface Area (ft²/ft³) |
|---|---|---|---|---|
| Pall Rings | 1" | 1.5-2.0 | 0.15-0.25 | 63 |
| Pall Rings | 2" | 2.0-2.5 | 0.10-0.20 | 31 |
| Saddles | 1" | 1.8-2.3 | 0.20-0.30 | 76 |
| Saddles | 2" | 2.3-2.8 | 0.15-0.25 | 38 |
| Structured | Mellapak 250Y | 1.0-1.5 | 0.08-0.15 | 250 |
| Structured | Flexipac 2Y | 1.2-1.8 | 0.10-0.18 | 223 |
| Raschig Rings | 1" | 2.0-2.5 | 0.25-0.35 | 58 |
| Service | U (Btu/hr-ft²-°F) | Comments |
|---|---|---|
| Gas-Gas | 5-35 | Low, extended surface often used |
| Gas-Liquid | 10-60 | Gas side controls |
| Gas Cooling (water) | 50-150 | Finned tubes common |
| Condensing (water cooled) | 100-300 | Depends on gas composition |
| Liquid-Liquid | 50-200 | Viscosity dependent |
| Reboilers (steam) | 150-400 | Natural circulation |
| Reboilers (hot oil) | 50-150 | Lower ΔT available |
| Air Coolers | 5-15 | Based on bare tube area |
| Separator Type | Demister Type | K-Factor (ft/s) | Comments |
|---|---|---|---|
| Vertical | Wire Mesh | 0.15-0.35 | Standard design |
| Vertical | Vane Pack | 0.40-0.60 | Higher capacity |
| Horizontal | Wire Mesh | 0.40-0.50 | L/D = 3-5 |
| Horizontal | None | 0.10-0.15 | Gravity only |
| Spherical | Wire Mesh | 0.20-0.35 | Compact design |
| Filter Separator | Cartridge + Mesh | 0.10-0.20 | High efficiency |
| Slug Catcher | None | 0.05-0.10 | Large volume |