Grid Versus Other Packings

Pressure drop. Duato ite high open area and high capacity, grid is one of the lowest-pressure-drop devices. Compared to 2-in Pall rings, grids typically have a pressure drop three to five times lower some 

Liquid to grids is usually supplied by spray nozzles, and thess may plug. As with other distributors, adequate measures are required to prevent plugging, and the grid manufacturer must be supplied with good data on the fouling potential of the service. 

Mechanical strength. The lattice structure of grids gives them a mechanical strength advantage compared to random and structured 

Corrosion and oxidation. Due to the relatively thick metal, low specific surface area, and rugged construction of grids, their tendency to oxidize is low. Grids tend to degrade to a much lesser degree than either random or structured packings. 

Maintenance and troubleshooting. Due to their layered structure, grids are easy to install, remove, inspect, and maintain. Grid cleaning (especially if coked up) may be difficult, often impractical, but even in such cases, it is easier than that of random or structured packings. 

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