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Your present location:Home >> Metal column internals >> Collection tray and distributor >> design principle and type

The collection tray is placed at the bottom of the filler plate to collect liquid flowing down and allow the liquid to flow out of the filler plate or flow into the liquid distributor under the catch tray.
A second liquid distributor is redistributed, lower packed bed, the liquid amount of the whole cross section.
Collection tray and redistributor generally are suitable for the following situations:
Another liquid feeding current needs to be introduced or removed
Mass transfer stage requiring large-amount realization
Wrong distribution of down-flowing liquid must be prevented
When the weight and mechanical stability of filler plate layer are limited
For not so important application, as follows, chimney type tray/V-shaped collection structure is used, and the overall height of needed collection tray and subsequent liquid distributor can be lowered.



Collection tray
Generally, the liquid in the collection tray can be discharged through the circular collecting tank and drainage canal. The collection tray can be regarded as an integrated water collection pit.
When equipment is shut down, liquid is kept in the water collection pit. The height of chimney decides the amount of keepable liquid. In order to prevent leakage, column manufacturer generally welds or bonds the collection tray.
Combi Element
In order to reduce the overall height of packed column and reduce the amount of used internals, various internals can be powerfully combined. Between two packing layers, a device for collecting, removing or distributing liquid flowing down is necessary. The patented Combi Element of RVT mass transfer equipment company can complete these tasks simultaneously in one single column internal. Besides lowering the overall height of the column, its further advantage is comparatively low pressure loss and permeability.

 

 

Page type collection tray                                                    deck type tray

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