For the design of the specific grids, following points have to be considered with regard to the load of the grid:

weight of packed bed

liquid hold up during operation

fouling

pressure drop of gas flow in cases of parallel flow

installation loads

The support grid has to be constructed in a way that it allows flowing of gases and liquids in the column as unrestricted as possible. Especially in the area between support grid and packed bed there is the danger of blocking the gas flow by an unsuitable packing support.

For the installation of a support grid, there is a support ring and - from case to case - one or more intermediate support beams necessary. Usually, it is sufficient to put the support grid on the support ring without fixing it. If, however, high gas velocities, pressures or flooding are to be expected it is necessary to fix the support grid at the support ring.

Bed limiters are placed directly above the packed bed in order to avoid upward movement or loss of tower packings. Besides this, bed limiters are installed between packed beds of different packing types to prevent intermixing of the different types inside the column.

Bed limiters are either put directly onto the packed bed or fixed to the column wall.

Please contact us for further information.