Design of Packed Columns 

• A packed column is a hollow tube, pipe, or other vessel that is filled with a packing material.
• Packed columns are used for distillation, gas absorption and liquid-liquid extraction.
• The gas-liquid contact in a packed column is continuous (or say Rate wise approach ), not stage-wise, as in a plate column.
• The liquid flows down in the column over a packing surface and the vapor (or the gas) moves counter-currently, up the column.
• The packing can be randomly filled with small objects like Raschig rings or else it can be a specifically designed structured packing.

Types of Packing Materials

• Packed beds may also contain catalyst particles or adsorbents such as zeolite pellets, granular activated carbon.
• Packed column utilize packing to contact between the phases (liquid-vapor) on the surface.
• Packed column performs well at low pressure, low liquidand vapor loadingthat make packed column have the most efficient in these terms.
• At high flow parameters the capacity and efficiency can significantly reduce, also in heavy fouling applications and corrosive condition.
• Packed column has less pressure drop than tray column and it reduce foaming since generates thin films instead of fine droplets for mass and heat transfer.
• Packed column is divided by Random, Structured and Grid Packed Columns.

Lets See More About Packed Column  by Below Mentioned Slides : 

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SourceArticle :    Wikipedia ; SlideShare

ImageSource :  SlideShare; firthengineering

Also Read:

Venturi Flow Meter

Pitot Tube 

Coriolis Mass Flow Meter

Design of Centrifugal Pump

Valve & Its Types

Cavitation

Piping and Instrumentation Diagram – P&ID

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