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Request credible Coker emergencies?

This topic contains 6 replies, has 5 voices, and was last updated by  Claus Graf 10 years, 8 months ago.

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  • #2827

    kennycramp9
    Member

    I am looking suggestions for three or more credible emergencies or casualties in our coker industry. I intend to use these scenarios for training. So far I have:
     
    1) Tarry Drum Scenario (3 hrs after switch, furnace trip leading to plugged drum inlet)
    2) Foam Over (Bad Drum Switch, dropping inlet temperatures to 800F with antifoam aligned to the wrong drum).  
     
    Any suggestions, gang? I am looking for at least one more. Perhaps water into the bottom of the main frac (it just seems to plain)?

  • #5873

    Claus Graf
    Participant

    How about:
    3) Coke bed collapse trapping drill stem assy. inside the drum.(and/or cutting system malfunction causing a delay in coke removal operation)
    4) Hot Spot during cutting ( due to bad quenching of the drum.)

  • #5870

    Anonymous

    Hot spot in drum

  • #5869

    Anonymous

    Some not mentioned above: 
     
    Recent fatalities (2008-2009):
    – 2 fatalities due to scalding after failed coke drum pressure tests. Operators were replacing bottom gasket when hot condensate came out of drum bottom
    – 1 fatality from manual bottom unheading when operator opened drum full of hot quench water
    – 2 fatalities when heater inlet line ruptured
     
    Other
    – piping failures due to high temperature, high sulfur corrosion (increases in operating temperature and sulfur content from original design)
    – closed block valve on coke drum inlet, causing heater tube rupture/fire
    – fires due to coke drum valving misalignment (HCGO quench oil flowing to open drum, coke drum overhead valves opened to open drum, coke drum inlet line opened to drain)

  • #5868

    Tim Sawyer
    Participant

    Thanks guys!
     
         Tarry Drum Scenario (3 hrs after switch, furnace trip leading to plugged drum inlet)
         Foam Over (Bad Drum Switch, dropping inlet temperatures to 800F with antifoam aligned to the wrong drum).  
         Stuck Drill Stem (or cutting system malfunction causing a delay in coke removal operation)
         Hot Spot during cutting ( due to bad quenching of the drum.)
         Dead-Head Scenario (closed block valve on coke drum inlet, causing heater tube rupture/fire)
         Fires due to coke drum valving misalignment (HCGO quench oil flowing to open drum, coke drum overhead valves opened to open drum, coke drum inlet line opened to drain)
         Cool down scenarios
    o       furnace tripping, long recovery coupled by failing to introduce enough cutterstock to the bottom of the main frac, leading to high viscosities or even partial solidification, and the inability to start the charge pumps
    o       Low rates, leading to a cold blowdown system, leading to HGO transfer pump issues.

  • #5813

    ted pivo
    Member

    Tim I;d like to add these emergencies;;;

    Operator pulling a fully charged drill stem out of a coke drum (by passing interlocks)
    Operator/maintenance person on drill deck when HP water hose breaks
    Operator/ maintenance personnel not secured when checking fluids in drill stem motor;;replacing drill stem motors;high pressure hoses, anytime when in the upper derrick
    escape routes with deluge systems;or stairways that have fire restant walls
    BYPASSING interlocks to get the job done
    locking out decoking equipment to replace/repair equipment( remember the hydraulic pump produces between 1100 to 3000# of pressure)
    Have a emergency rescue plan in place to remove injured personnel of the drilling deck/structure

  • #5707

    zachariah wilbur
    Participant

    Good to know these kinda info..!! Thanks for sharing..!!

    Will..!!

    .

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