Shell High Performance Trays

Through the exclusive Alliance of Technology with Shell Global Solutions, Sulzer provides you exclusively with the complete range of Shell Mass Transfer Technology products, including the high performance trays, based on multi downcomer principle for high liquid loads.

Information

Shell HiFi™ trays

Best tray for high liquid loadings:

  • Longest weir length per given column diameter 
  • Largest downcomer area (DC) per given column diameter 
  • Most uniform flow path length 
  • Most uniform vapor distribution 
  • Minimum inactive zones 
  • Maximum bubbling area

Highest capacity at large liquid loadings: 

  • Lowest pressure drop at large liquid loadings 
  • Best mass transfer efficiency at large liquid loadings 
  • Tray spacing as low as 300 mm (11.8 in)

Can be equipped with different types of tray deck: 

  • Sieve holes 
  • Float valves 
  • Fixed valves (see Shell HiFi Plus)

High reliability: 

  • Several hundred columns in operation

Mechanical features: 

  • Multi-downcomers are located offset to the cross section centerline 
  • Multi-downcomers are supported by a central major beam and 360° tower support ring 
  • No need for downcomer bolting bars 
  • Available in boltless lip-slot panel connections that minimize installation time by up to 30%

Shell HiFi Tray

Shell Calming Section™ (CS) trays

Hydraulically self balancing tray

Longer weir length compared to conventional downcomers: 

  • Able to handle moderate liquid rates

Truncated downcomers: 

  • Maximize active area 
  • Increase jet flood capacity 
  • Minimize entrainment 
  • Up to 30% higher useful capacity compared to conventional trays

Low tower height per theoretical stage: 

  • Tray spacing as low as 300 mm (11.8 in)

Can be equipped with different types of tray deck: 

  • Sieve holes 
  • Float valves 
  • Fixed valves (see Shell CS Plus)

Mechanical features: 

  • Multi-downcomers are located offset to the cross section centerline 
  • Supported by 360° tower support ring 
  • No need for downcomer bolting bars 
  • Available in boltless lip-slot panel connections: reduction of installation time by up to 30%

Shell Calming Section (CS) Tray

Shell Calming Section Plus and HiFi Plus trays

The Shell CS Plus and HiFi™ Plus trays are enhanced versions of the standard Calming Section and HiFi™ trays. The following two additional features are incorporated into both types of tray to boost vapor and liquid capacity.

MVG valves on active panels: 

  • To reduce entrainment 
  • To maximize jet flood capacity

Crown Inlet Device (CID) at the entrance of the DC: 

  • Enhances vapor-liquid disengagement 
  • To maximize DC capacity

These features provide up to 10% higher useful capacity than the standard CS and HiFi trays at the same tray efficiency.

Shell HiFi Plus Tray

Shell Grid trays

The Shell Grid tray is a high-capacity, dual-flow type of tray.

Functional features: 

  • The contact area for liquid and vapor is achieved by means of adjacent bars 
  • The open area for liquid and vapor passage is defined by the size and the pitch of the bars

Main applications

The Grid trays are mainly used for heat transfer services in fouling applications, and or corrosive environment: 

  • Slurry Pump Around of Fluid Catalytic Cracking Main Fractionator
  • Top Pump Around of Crude Distillation Unit Main Fractionator, Coker Main Fractionator
  • Bottom Pump Around of Thermal Cracker Main Fractionator, Visbreaker Main Fractionator

Shell Grid Tray

Shell HiFi extraction trays

  • Suitable for systems with interfacial tensions below 25 dyne/cm and large phase ratios 
  • To enhance capacity of existing extractors 
  • To increase capacity by up to 25% compared with rotating disc contactors 
  • To increase capacity by up to 15% compared with conventional extraction trays 
  • Allow for small tray spacing down to 300 mm 
  • Can be used among others in aromatic extraction, caustic treating, and lube oil applications

Shell HiFi Extraction Tray

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