How to determine if a packed tower is clogged
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The pressure drop in the packed tower is increasing; is it caused by blockage of the packing or an increase in the load inside the tower? How to distinguish between the two
Is the liquid level at the bottom of the tower high or low? If the liquid level drops, it is likely due to a blocked tower.
Conditionally, it is possible to determine whether the gas velocity exceeds the value appropriate for operation with an empty tower by calculating the flow rate and checking the liquid level, in order to assess whether the load is too high.
With gamma rays used for scanning, it’s easy to identify where there are blockages or collapses