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Inlet Feed Diffusers
An inlet feed diffuser is used to distribute the incoming vapour and liquid onto a distributor tray underneath.
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Scale Catching Trays / Baskets
Scale catching trays or baskets are used to prevent fouling material entering the catalyst bed. The scale baskets can be either mesh type or wedge wire type and are usually held in a frame or tied together with chains.
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Catalyst Support Grids
For catalyst beds DtEC provides 3 types of support grids:
- Lattice Bar + Perforated Screen Type
- Lattice Bar + Mesh Screen Type
- Wedge Wire Type
With the lattice type grids, for a given mechanical design load (including pressure drop) bars of an appropriate height and thickness on the required pitch are used. Typical grid height is 100 to 150mm. The perforation hole diameter and/or mesh size are selected taking into account the catalyst particle size.
The wedge wire grids are constructed from screen made from a series of parallel V profile wire welded to perpendicular support rods or bars.