Questions on Technology
Often, questions are received about particular aspects of distillation.
This includes operation, troubleshooting, design, and construction.
Short answers, specifically aimed at those questions are made.
Some of the questions and responses are posted here. These responses
apply to very specific situations, so be careful in applying them
to your plant.
Questions and answers are posted as they arrive. This page
is updated often. Please return to keep track of new technical
information. In general, the most recent postings are listed first.
Questions should be sent via e-mail
or use our contact information.
This page updated 06 February
- Vaporization limits
in thermosyphon reboilers
- Control of parallel
- Mass-transfer unit
approach to column design.
- Fluid heating systems:
vaporizer, stab-in, thermosyphon, forced, kettle
- Vacuum system selection
and pumparound control logic
- Heat exchanger system
- Packing efficiency
tests and interpreting the results to operating units
- Liquid level measurement
problems in an FCC main fractionator
- Hanging downcomer
high-capacity trays: what are they and how do they work?
- Cascade control on
distillation units: why use it?
- Dry-out of a supercritical
- Random packing hold-downs
and open area for flow.
- Structured packing
application in high-pressure systems: limitations and experience.
- Visbreaker wash zone
coking: poor product quality (D8 color) from HVGO cut from a
visbreaker vacuum fractionator.
- Dual reboiler operation:
removing the first reboiler of two reboilers from service while
leaving it in place: petroleum refinery FCC naphtha stabilizer.
- Thermosyphon reboiler
operation: affect of liquid levels on heat duty in a recirculating
system without a baffle: petroleum refinery naphtha splitter.
© 2000-2003 The Distillation Group, Inc. All rights reserved.