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A tall vessel with a hatched or shaded internal zone.
Also known as: Packed tower symbol, Packing bed symbol
On a process diagram a packed column is drawn as a tall vessel with a hatched internal zone representing packing material, over which liquid flows to contact rising vapour.
Denotes a column using a bed of packing rather than trays to bring vapour and liquid into contact.
Contexts: Technical drawing
Is drawn differently from a tray column because the internals differ, and the choice between them is a real process decision.
Contexts: Technical drawing
A tall upright vessel with a cross-hatched or shaded block drawn across part of its interior.