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Severe fines deposition in FCC expander

Home Forums CatCracking FCC Process Severe fines deposition in FCC expander

This topic contains 0 replies, has 1 voice, and was last updated by  Freddy Martinez 9 years, 4 months ago.

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    Freddy Martinez
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    In one of our FCC units (Kellog Orthoflow model), we are suffering severe problems of fouling (fines deposition) in the turboexpander. The scheme of the flue gas circuit is: two stage cyclones in the regenerator + Shell Third Stage Separator before turboexpander + 4th Stage Separator (cyclon) to recover flue gas from fines coming from TSS.
    We have also observed high level of moisture in the fines from 4th Stage Separator (10-15%wt). So we suspect that the fouling of the expander is due a cold point in the flue gas circuit (where flue gas humidity is condensed) or an uncontrolled inlet of water / steam.
    Has anyone experienced this kind of problems in an FCCU? What could be the potential causes of the severe fouling of the expander?

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