In the 1950s, temperature-equalizing columns were commonly used in steam drum differential pressure–based devices for measuring water level. However, these columns are problematic because a ...

The low-pressure zone created by the implosion causes the water column to be drawn up the pipe and slam into the closed valve at high velocity. A water hammer pressure pulse is emitted at impact.

The liquid-level driving force through the reboiler ... After the column revamp, bottom product purity was 89-91%. Overall column pressure drop was the same level as before the revamp.