|Home||Search||Emissions||Pollutants||About the Database|
|State Police #||07-00556|
|Pollutant||Duration||Point Source||Greenhouse Gas||Criteria Pollutant||Ozone forming chemical||Amount of Release|
|Sulfur Dioxide||7 h 18 m||Refinery Flare No. 2 19AH-901||NO||YES||NO||3,680.0 pounds|
|Hydrogen Sulfide||7 h 18 m||Refinery Flare No. 2 19AH-901||NO||NO||NO||10.0 pounds|
Accident Classified As: Reportable Quantity
during start up of FCCU and shut down of the electric-motor driven pump, the turbine-driven pump failed to maintain adequate feed flow and both charge heaters tripped. During FCCU Start up the Main Fractionator vented to fla
The excursion of the Main Fractionator overhead pressure during startup, not the series of trips that previously shut down the unit, was the cause of the significant flaring that led to the SO2 RQ exceedence. While the existing startup procedure directed personnel to search for water pockets in easily accessible locations in the overhead circulation line, it is not possible to search the entire line and some water pockets may remain undetected. It is therefore important to also slowly increase circulating reflux flow rates in an attempt to minimize pressure spikes due to previously undiscovered water pockets.
Motiva revised the FCCU normal startup procedure to highlight the desire to slowly increase circulating reflux flow rates in an attempt to minimize pressure spikes due to water pockets.