Know Your Refinery Flashcards
What does Crude slate mean?
A listing of the various crudes that are processed in a refinery during a given period
The Refinery is currently running a 5/50/45 split or ratio. We are scheduled to start running a 10/50/40 ratio next week, what does this mean?
The Coker is fed from 90/91/92 tanks. Typically, we do not just pull from one tank but rather take a ratio out of each to equal 100% of the total feed, so 5% from 90tk, 50% from 91tk and 45% from 92tk would be a 5/50/45 ratio.
Why should I care about what ratio the Coker is running and how does this affect me?
Each tank holds a different API gravity crude which is differentiated by its density and Sulfur content. Crude oil with a low API gravity is considered a heavy crude oil and typically has a higher Sulfur content and a larger yield of lower valued products. Heavier crude will result in more cracked or reactive Naphtha to the FH and more acid gas to the amine units and Sulfur Plants compared to a lighter crude ratio.
If you raise the flow of the Crude unit Naphtha or (quench) does this mean you have raised the total charge or does the quench just make up a percentage of the total charge set by FIC-223 and 227?
The Quench is intended to do just as the name implies, Quench the reaction of Coker naphtha in the RX. This does not add to or lower your total charge, it just means you are raising or lowering the percentage of Crude unit Naphtha that makes up your total.
The FH surge drum level has been easing up over the last 4 hours and is now at 85% TDIC-218 is reading 98 degrees. How can I help lower the level in the Surge drum?
I need to cut back on my Quench and allow a higher percentage of Coker naphtha to be pulled from the surge drum to make up my total charge until I start getting closer to 150 on the Delta.
The South complex called and asked if you would send 500 BPD more to the Hydrocracker, what else would making this move immediately affect?
It would take 500 BPD away from what’s going back to the Naphtha separator.
