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| Identifying poor heat exchanger performance |
Mark Fernsby and Abe DuPont, Natref Tony Barletta and Steve White, Process Consulting Services Inc
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2007 / Revamps |
Identifying root causes of poor crude unit debutaniser reboiler performance and low-cost solutions that help meet exchanger original design conditions. Of primary importance is the impact factors such as fouling have on the service heat-transfer coefficient.
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| FCC gas concentration unit stripper revamp |
Dave Langdon, Total Lindsey Oil Refinery Scott Golden and Edward Hartman, Process Consulting Services Inc
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2007 / Revamps |
Unit charge rate and reactor conversion were increased by the elimination of stripper column flooding. Chemical-grade propylene specifications were met and C2 excursions in mixed C2/C3 streams were eliminated.
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| Lube vacuum column revamp |
Kevin Basham, Marathon Petroleum Company LLC Edward Hartman, Process Consulting Services Inc
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2007 / Revamps |
The basis of a lube vacuum column revamp and its results are discussed. The primary goals were to increase lube product fractionation, minimise HVGO product contaminants and improve vacuum bottoms specifications for asphalt production.
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| Reducing a plant's turnaround schedule |
Mike Lippold, BJ Process & Pipeline Services
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2007 / Revamps |
The removal of asphaltenes and residual hydrocarbons from vessels during the cool-down and steam-out phases can eliminate the source of VOC off-gassing and reduce a plant's turnaround schedule by several days.
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| Revamping atmospheric crude heaters |
Michael Whatley, Navajo Refining Company Scott Golden and Jason Nigg, Process Consulting Services inc
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2007 / Revamps |
The revamp of an atmospheric crude unit heater, which was suffering from coking caused by asphaltene precipitation and poor burner stability, resulted in a significantly increased heater run length.
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| Optimising turnaround maintenance performance |
Salah Massoud Elemnifi, Arabian Gulf Oil Company Farag E Elfeituri, University of Garyounis
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2007 / Revamps |
Case study of a risk-based inspection technique where maintenance and inspection activities were moved from a traditionally reactive or time-based approach to proactive maintenance. The optimisation of both turnaround duration and interval is discussed.
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| OSBL considerations for expansion projects |
Dominic M Varraveto, Burns & McDonnell
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2007 / Revamps |
Example cases of refinery revamp and expansion projects, where the aim is to identify and compare the various OSBL requirements for each project. Guidelines are presented for improving the accuracy of the OSBL definition early in project development.
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