Sloley, A. W.
Consider the pros and cons when importing heavy oil for cokers
The recent shift to lighter crudes has starved many US heavy oil units of feed. Maximizing asset use makes importing heavy oil for vacuum distillation and delayed coking attractive.
Mitigate fouling in crude unit overhead—Part 3
CASE STUDYThe basis for this case study is shown in Fig. 18; it is a crude unit with overhead heat integration. This is a one-drum overhead system with heat integration and no water wash. In an attemp..
Mitigate fouling in crude unit overhead—Part 2
Up to 50% of the refinery’s entire corrosion expense may occur in the crude unit. The root causes of the fouling and corrosion issues are often linked to the basic unit configuration choices, as ..
Mitigate fouling in crude unit overhead—Part 1
In a refinery crude distillation column, up to 40% of the total heat removal may be found in the tower overhead condenser. The quantity of duty available makes heat integration (HI) between the column..
Increase diesel recovery
New approaches fine-tune methods to separate more diesel as product stream
How to handle low-liquid loadings
Better tray design techniques reveal dynamics to improve minimum liquid load conditions
Optimize process operation with new vacuum distillation methods
Advanced fluid dynamics modeling fine-tunes vacuum separations that improve products' qualities and increase unit reliability
Improve tray operations
How failure occurs from blowing and what can be done to prevent it
Cat naphtha sulfur management: undercut or not?
Several processing options can create a high-sulfur heavy cat naphtha that concentrates FCC sulfur into one stream
Consider modeling tools to revamp existing process units
In this case history, a refiner uses simulation models with plant test data to debottleneck a crude unit
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