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Diesel Hydrotreating Unit Throughout Reduction

dht unit plant thoughout pressure drop checking hindrance in line

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#26 PingPong


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Posted 20 July 2019 - 05:25 AM

Thanks for the update, but it is a pity that everybody lost so much time on this subject because you first stated that the exchanger had been  cleaned.


Still the question remains how it is possible that an exchanger in gasoil service fouls so much that it can create a pressure drop of 16 bars.


Does the gasoil feed to the unit contain a lot of visbreaker gasoil, and/or delayed coker gasoil, and/or thermal cracker gasoil, and/or LCO from FCCU ?

If so you may need to put nitrogen blanketing on the gasoil storage tanks from which this unit is fed.

#27 Bobby Strain

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Posted 20 July 2019 - 10:05 AM

This should serve as a learning experience.



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