Collecting trays & redistributors
Collecting trays are used to collect downcoming liquid at the bottom of a packed bed, allowing for removal of liquid from the column. Alternatively, the liquid is fed into a liquid redistributor below the collecting tray, which in turn redistributes the liquid over a second, lower, packed bed.
There are several types of collecting trays and liquid redistributors to choose from depending on type process and choice of material.
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Applications areas for collecting trays and redistributors
Collecting trays are used to collect liquid below a packed bed, and then remove the liquid from the column. The collected liquid can also be fed to a liquid redistributor which in turn distributes the liquid over a second, lower, packed bed.
Collecting trays and redistributors are mainly installed when
- liquid flow should be removed or added
- to avoid uneven distribution of downcoming liquid in columns with high packed beds
- the weight or the mechanical stability of a packeed bed is a limitation
Different types of collecting trays and redistributors
Chimney-type collecting tray
Vane-type collecting tray
Pan-type redistributor
Trough-type redistributor
Deck-type redistributor
Trough redistributor with integrated parting box
Listed below are RVT's different types of collecting trays and redistributors.
| Model and Material | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Design type | Metal | Plastic | Ceramic | ||||||||
| Chimney type collecting tray | M 900 K | P 900 K | - | ||||||||
| Vane-type collecting tray | M 900 L | P 900 L | - | ||||||||
| Pan-type redistributor | M 200 T | P 200 T | K 200 T | ||||||||
| Trough-type redistributor | M 200 B | P 200 B | - | ||||||||
| Deck-type redistributor | M 200 KK | P 200 KK | - | ||||||||
| Trough redistributor with integrated parting box | M 200 KQ | P 200 KQ | - | ||||||||
Other types or special designs on request.
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Optimised performance in mass and heat transfer processes
For optimised performance in a mass or heat transfer process it is important to understand the underlying principles and parameters that are important to consider when designing a column for flue gas cleaning, flue gas condensation or stripping.
Founded in 1976, RVT Process Equipment is a leading supplier and manufacturer of droplet separators, packings, column internals and other products for mass and heat transfer processes.
RVT Process Equipment offers advanced engineering and technical support and has extensive experience in various processes and applications in the chemical and petrochemical industry, refineries, power plants, and pulp and paper. The R&D department houses fully equipped test units, available to carry out customer-specific tests when needed.
RVT Process Equipment has subsidiaries and manufacturing facilities in Knoxville, USA and in Kunchan, China.
Other column internals
Liquid distributors
Liquid distributors ensure an even distribution of liquid over the entire cross-section of the packed bed.
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Gas distributors
Gas distributors distribute the incoming gas flow evenly across the cross-sectional area of a column.
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Combi element
RVT's patented Combi element combines the function of a support grid and a collecting tray, in a single unit.
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Random packings
Designed to optimise the contact surface area between gas and liquid, with lowest possible pressure drop.
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