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VGPlus trays are Sulzer Chemtech’s high performance chordal downcomer trays. They offer industry proven and Fractionation Research Inc (FRI) validated advanced tray technology for today’s market.
Advantages compared to conventional trays:
- Higher capacity: up to 30%
- Lower pressure drop: up to 20%
- Equal or higher mass transfer efficiency
- Lower hydraulic gradient
- More uniform liquid flow
- More uniform vapour distribution
- More uniform L/V on tray deck
- Higher fouling resistance
Characteristics:
- Enhanced tray deck design
optimized MVG valve layouts
redirecting and froth promoting devices such as Baffle Bar and Push Valves
 
- Improved downcomer technologies
Sloped
Truncated
Stepped
Multi-chordal
 
FRI Validation:
- Superiority of VGPlus tray technology has been confirmed by independent experiments at FRI
- Tray has been tested in a 1.2m diameter tower at 7 and 11bar with i-C4/n-C4 system
- VGPlus provided up to 10% higher capacity compared to competitors high performance tray
- VGPlus tray efficiency increased up to 15% of competitors high performance tray
- VGPlus is best ever tested high performance chordal downcomer tray
New Ways in Tray Development:
- Computational Fluid Dynamics (CFD) supported classical research and pilot testing in developing the VGPlus trays
- CFD used for the first time of tray history
- CFD allows to study complex two-phase phenomena, e.g. froth flow and liquid entrainment
VG AF (Anti Fouling) trays provide superior anti-fouling performance while delivering high capacity and efficiency making these trays ideal for debottlenecking fouling services.
- VG AF trays are part of VGPlus tray family
- Specially designed for fouling services
- Uses large fixed valves
- Tailored design features on tray deck reduces stagnation zones
- High performance downcomer technology enhances liquid disengagement on tray deck
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