Patent
1995-06-06
1998-07-21
Hafiz, Tariq R.
395 10, G06F 1518
Patent
active
057845387
ABSTRACT:
This invention comprises a process and apparatus for identifying pre-flood and pre-carryover conditions in a separation column operation. The process preferably includes monitoring at least two measurable process variables, calculating a rate of change for each variable, assigning a rate of change alarm to each variable, and identifying a synchronous rate of change in at least two of the variables. The process further includes avoiding a flood or carryover condition by reducing a reboiler temperature in a reboiler connected to the separation column when the alarm activates simultaneously for at least two of the measurable process variables, and then incrementally raising the reboiler temperature during a period of time. The process further includes a system whereby the capacity in a separation column is optimized, and wherein separation is improved even when the separation column is operated at least than capacity.
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Dzyacky George E.
Hafiz Tariq R.
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