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RE: information about fractionator tower

Home Forums Coking Technical Fractionation & Process Process information about fractionator tower RE: information about fractionator tower

#6104

any tower that may be subject to coking, for sure there are some points to keep in mind especially in the section covered up from the bottom to the withdrawal of HCGO  that is commonly called P2 (Foster wheeler), a principle in this tower also had a tray below the P2 section called P1 (between this two tray is the washing section, in some tower have tray or spray chamber) , this tray P1  in the new design does not incorporate because they tend to coking when they lose the wet (dry)  and currently only uses  shed tray type (these are also designed to avoid liquid accumulate in these shed tray because they tend to coking)
The wash zone commomly can be design with spray chamber with two distributors, which usually are designed for 50% capacity of washing liquid, and must be taken into account in this design that will never operate below the minimum flow becasuse they can be plugging, also should not be operating over its maximmum flowbecause  the nozzles create a drop too fragmented (mist) , which tends to go up with gas/vapor which does not help the cooling and washing the gas from the heavier components a(this fixed the end point to the HCGO) and this can  produced coke up in this section
The bottom section have an agitator ring whose function is to maintain the solid movements so that the solids removal system may be filtering the solids that reach the bottom 
New designs have changed the line of fresh feed  (vacuum reside) coming into the tower so that it enters into a ring that is around the strainer that are housed into the tower (this strainer is on the suction line to pump load) and thus maintain the same clean from solids
 
Im sorry for my english if you have an email I can send you some drawing ,I hope this can help you Best Regards

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