Refining Community Logo

Claus Graf

Forum Replies Created

Viewing 15 posts - 16 through 30 (of 127 total)
  • Author
    Posts
  • in reply to: Fractionator Btms sampling #4802

    Claus Graf
    Participant

    In the DCU’s I worked we would sample the fractionator feed. (Or the VTB).
     
    Regards
     
    CG

  • in reply to: Blowdown system #4814

    Claus Graf
    Participant

    Hi,
     
    You might want to check page 69 of 131 (Question 48) in the document linked below:
     
    http://www.npra.org/forms/uploadFiles/E1F600000026.filename.AnswersBookrevised.pdf
     
    Regards
     
    CG

  • in reply to: Velan switch valve sticking #4839

    Claus Graf
    Participant

    Two things come to mind:
     
    1. You said the valve is operable by hand. The actuator/motor could be bad.
     
    2. If the valve got switched without proper steam pressure, then the resid can get into the cavity. If this is the case it wont be long before this resid get hard inside and makes the valve inoperable.
     
     
    Regards
     
    CG

  • in reply to: Use of a belt or pipe conveyor for coke #4850

    Claus Graf
    Participant

    In a plant I worked a few years ago we had both.
     
    The flat conveyor was used to move coke from the pit to the storage area.
     
    From the storage area to the shiploader dock (about a mile away form the shoreline) we had the pipe conveyor to prevent/minimize coke from falling in the water.
     
    Regards
     
    CG

  • in reply to: Furnace explosion #4882

    Claus Graf
    Participant

    The document in the link below might be helpful:
     
    http://www.ortloff.com/files/papers/HydrEng2.pdf
     
    Regards
     
    CG

  • in reply to: Problem in Drum Check with DV #4891

    Claus Graf
    Participant

     
     

  • in reply to: Heater Charge Pump Min Flow Recirculation #4929

    Claus Graf
    Participant

    Good morning,
     
    In the first coker I worked, the set up was 4 drums, 2 heaters and 3 heater charge pumps (2 running – 1 spare). So one pump would feed one heater and a pair of drums. Simple. No minimum flow line required because the pump could cover the operating range without going below minimum flow.
     
    About a year ago I participated in a 4 drum coker startup in the Gulf Coast that had only 2 pumps. One running – one spare. The running pump would feed 2 heaters. (each heater – 2 drums). This system had minimum flow line to protect the pump from going below minimum flow if one heater tripped. (Or when running at reduced rates).
     
    Because the heater charge feed has coke particles (as big as 1/2 inch) the minimum flow control valve has to be capable of passing coke particles this size. The pressure drop was 600 psig (pump discharge) to 15 psig (bottom of fractionator). This was done with two valves in series.
     
    Hope this helps.
     
    Regards
     
    CG

  • in reply to: High CCR due to plugging of spraying wash #4934

    Claus Graf
    Participant

    This system should have a medium pressure steam supply downstream of the control valve.
     
    In case of a loss of wash oil flow, the medium pressure steam will clear the HKGO in the header and prevent it from coking. (It doesn’t take long to plug the washoil spray header).
     
    Regards
     
    CG

  • in reply to: Coke drums feed line with Deltavalve #4938

    Claus Graf
    Participant

    Hi,
     
    Space is your main issue. If it is an older coker, trying to fit a deltavalve and double feed lines can be difficult.
     

    CG

  • in reply to: Vapor heat #4971

    Claus Graf
    Participant

    In the last coker I worked, we only used steam to warm up an empty coke drum for start-up. While running, we would warm the empty drum with the hot vapors of the “coking” drum.
     
    I’m guessing here, but your coker probably doesn’t have a “coke condensate drum”. This is where we would recover the hydrocarbon liquids from the drum being warmed. From this drum, we would then pump the liquids back to the fractionator, entering below the heavy coker gas oil draw pan and above the the sheds.
     
    Regards
     
    CG

  • in reply to: questions of rotary equipments #4996

    Claus Graf
    Participant

    This document should help answer some of the questions.
     
    http://www.peerlessxnet.com/documents/B-0077.pdf
     
    Regards
     
    CG

  • in reply to: COP sells Coker Tech Licensing to Bechtel? #5016

    Claus Graf
    Participant

    Good for you Brian. Best of luck with your new endeavors.
     
    Sincerely
     
    Claus

  • in reply to: Update – Total Pt Arthur New Coker Starts Up #5073

    Claus Graf
    Participant

    Total Says Port Arthur, Texas, Coker Project Starts Safely
    By Leela Landress –
    document.write(dateFormat(new Date(1304612716000),”mmm d, yyyy h:MM TT Z”));
    May 5, 2011 11:25 AM CT
     
    Total SA (FP), Europes third-largest oil company, started a new 50,000-barrel-a-day coker project at its Port Arthur refinery in Texas that will increase the refinerys ability to process heavy and sour crude oil, according to a company statement.
     
     
    http://www.bloomberg.com/news/2011-05-05/total-says-port-arthur-texas-coker-project-starts-safely-1-.html

  • in reply to: mule ear leack #5119

    Claus Graf
    Participant

    Mule ear tip:
     
    Make sure you mark every plug location, so you can put it back in the same place after maintenance.
     

    Regards
     
    CG

  • in reply to: Wash Oil Flow Quantuty #5145

    Claus Graf
    Participant

    You might find this article helpful:
     
    http://www.fwc.com/publications/tech_papers/files/HP09%20OptimizeCokerOps.pdf
     
    Regards
     
    CG

Viewing 15 posts - 16 through 30 (of 127 total)
Refining Community