Engineered Vapor-Liquid Contact
Vertical Sieve Trays (VSTs) feature chimney-like risers (Ø100-200mm) with perforated sidewalls and calibrated bottom clearances. This design creates renewed gas-liquid interfaces while eliminating droplet entrainment – achieving 40% higher capacity and 20% greater efficiency than conventional sieve trays in FCC main fractionators, NGL columns, and amine regenerators.
Core Anti-Blocking Mechanism
| Component | Function |
|---|---|
| Perforated Chimneys | 500+ sidewall holes (Ø3-8mm) disperse vapor laterally |
| Bottom Clearance | 15-25mm gap enables liquid entry while preventing solids accumulation |
| Vertical Flow Path | Zero horizontal droplet velocity eliminates 90% entrainment |
| High Open Area | 25-40% vs. 8-18% in sieve trays |
(Validated hole velocity: 12-30 m/s at F-factors ≤3.5 Pa⁰·⁵)
Performance Advantages vs. Sieve Trays
| Parameter | Vertical Sieve Tray | Conventional Sieve Tray |
|---|---|---|
| Capacity | ▲ 30-40% | Baseline |
| Entrainment | ▼ 80-90% | Baseline |
| Murphree Efficiency | ▲ 15-20% | Baseline |
| Fouling Resistance | ● Excellent | ▼ Moderate |
| Turndown Ratio | 4:1 | 2.5:1 |
Industrial Applications
► Refining Critical Units
- FCC main fractionators (>100k BPD)
- Delayed coker fractionation
- Vacuum residue towers
► Gas Processing
- NGL recovery columns
- Amine regenerators (H₂S/CO₂)
- Glycol dehydration contactors
► Petrochemical
- Ethylene cracker quench towers
- Butadiene extraction columns
- Aromatics concentration stages
