Delayed Coking – Operations and Safety

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    • #1861
      4 drums coker
      Participant

      Facilitators: Curtiss Winter, Consultant & Bobby Wright, Stress Engineering

      TOPICS OF DISCUSSIONGaskets
      Ownership of Unit
      Training
      Overpressure Scenario
      H2O Hammering
      Foaming-Coke Drum
      Oil Sludge Injection
      Operator Shift Turnover
      Operator Rounds-Schedule
      GASKETS
      – cyclic surface styles of gaskets. What is being used?
      304 flexatalic with inner ring
      grafoil steel gasket
      specialized tonguing, bolts used?
      – leaking during cycles
      –causes?
      ORJ’s stylesOWNERSHIP OF UNIT
      unit culture
      –active and effective communication
      –accountability is in decline
      – does technology have any effect
      better training, understanding
      operator participation
      – try to have some stable supervisor positions
      – frequent job rotation seems to take away from ownership
      – recognition of staff

      KPIs can help provide feedback

      TRAINING
      – shift turnover
      — need to give important info other than the normal operations.
      – operator rounds
      — hand held computers not an effective way to check equipment
      — 2Xs per shift
      – training
      — basics only in classroom not enough
      more outside time is neededNEED TO SET UP NEW EMPLOYEES FOR SUCCESS AT UNIT LEVELOVER PRESSURE SCENARIO
      – cooling H2O rate failure or hot spots…
      – leaving the quench H2O in at the top of the drum by accident
      – fract overhead accumulator off gas pressure controller closes off

      H2O HAMMER
      – cooling a drum by introducting during coling cycle to minimize water hammer
      – valve seating leak

      FOAMING OVER
      – anti foam
      – watching outages
      – switch early
      – causes
      — feed temp- balance
      — pressure
      — velocity of vapors
      – challenges with consistent level indication

      OIL SLUDGE INJECTION
      Pushing to Increase Amount Injected
      -100 micron particulate
      – 1 hour/ 300GPM (500F skin ti 4 feet above cone)
      – exposure to people
      – others are doing this

      OPERATOR SHIFT TURNOVER
      – have a way to document important situations with the unit
      – have 45 minute window for shift exchange

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