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This topic contains 5 replies, has 4 voices, and was last updated by Anonymous 13 years, 9 months ago.
January 13, 2009 at 1:49 pm #3235
Hi, I’m a new user and I need some information about a typical fractionator tower like kind of plates, recycling rates. Anybody here know, for example, the dimension of a typical plate as weir height, across section and etc. Is there any book about this?
February 10, 2009 at 4:38 pm #6264
Can anybody help me?one book!!!
February 12, 2009 at 8:30 pm #6252
Distillation Design and Distillation Operation, both by Henry Z. Kister may help.
He has also a good paper ” What caused tower malfunctions in the last 50 years?” ; no sure if this link works..just try
June 9, 2009 at 4:43 pm #6105
Ok man. Thanks for help.
I’ve both books, but some specifics details about delayed coking fractionator tower, it’is that I want. Or the fractionator is “equal” to another tower?!
June 9, 2009 at 9:41 pm #6104
antonio saura CebrianParticipant
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
June 10, 2009 at 10:20 am #6103
Don’t Worry spana2005, I’m Brazilian and my English it’s so far to be good(and I’m the guest user above ).
I have one book “Petroleum Refinery distillation” and have one chapter that discusses about coking fractionator. This book does some assumptions that seems so different to me. They are:
1 There is no external recycle from condenser to top tray, unless it has steam condense in this tray, in this case some reflux it’s necessary to lower water pressure vapour.
2 There is no internal reflux from tray where is sidestream of LCGO to tray below.
3 There is no internal reflux from tray where is sidestram of HCGO to tray below.
4 The same assumption above was made to tray above grid section.
Are assumptions acceptable to make a computer operator simulation?
I have another question. How is the device that stripped de LCGO, a simple flash device(one stage)?
Sorry, but I’m Chemical Engineering student and some informations about this equipment is so difficult.
My e-mail is : firstname.lastname@example.org to send anything about coking. Much more is better.[:D]
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