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Design of wash zone for coker main fractionator

Home Forums Coking Technical Fractionation & Process Fractionation Design of wash zone for coker main fractionator

This topic contains 2 replies, has 2 voices, and was last updated by  fred genot 9 years, 5 months ago.

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  • #3720

    Anonymous

    We plan to retray our DCU main fractionator.
    Some vendor recommend us to install grid in the wash zone.
     
    We are worry about coking and fouling problem in the grid section.
     
    Is there any coker operating the main fractionator with this design?

  • #5740

    fred genot
    Participant

    we use a grid in the wash section for many years and never had any coke problems with it. We do have a constant flow of hot pumpback (wash-oil) just above the grid to keep the grid cleen.

  • #4936

    Anonymous

    If you use grid then you will have to use a significant amount of wash to keep it from fouling. This will result in high recycle generation, which generally is not desireable because recycle reduces the liquid product yeild. That is why the standard design for cokers wishing to maximize liquid product yield is an open spray chamber flash zonew design. Jerome K. DeHey I Cubed Energy Consulting, Inc. 281-573-8898

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