What is the operating flexibility of a packed tower?
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If 80% of the average gas velocity is chosen as the design point, then the upper limit for operational flexibility is 100/80=125%?
The upper limit for operational flexibility should also be determined based on the flooding rate of the packing. If the packing starts to flood at 110%, increasing the load any further will result in poor separation performance; it is possible to operate under such conditions, but the required level of separation precision cannot be achieved