Separation process and apparatus for removal of particulate material from flash zone gas oil
AssigneeConocoPhillips Company
InventorsSharon A. Annesley, Gary C. Hughes, Jamal Allyen Sandarusi
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Abstract
A process and an apparatus for removing particulate material from a flash zone gas oil stream produced in a delayed coking unit. The process and apparatus of the invention employ cyclonic separation to remove particulate material from the flash zone gas oil stream. The stream can then be further processed, for example by passing the stream to a fixed bed catalytic hydroprocessing unit and then to a fluidized bed catalytic cracking unit, or to other processing units, thereby enhancing the value of the flash zone gas oil stream.
Claims47
In a delayed coking process in which overhead vapors from a coking drum are fed to a coker fractionator where said vapors are separated into an overhead vapor stream, intermediate liquid streams, and a flash zone gas oil stream containing a substantial amount of particulate material of varying diameter, the improvement comprising:
- supplying said flash zone gas oil stream to a first separator;
- operating said first separator to remove particulate material having a diameter greater than about 500 micrometers from said flash zone gas oil stream and form a first reduced particulate stream;
- supplying said first reduced particulate stream to a second separator comprising a cyclonic separator;
- operating said second separator to remove particulate material having a diameter greater than about 25 micrometers from said first reduced particulate stream and form a second reduced particulate stream;
- and
- supplying said second reduced particulate stream to a hydroprocessor.
In a delayed coking apparatus comprising a coking drum that generates overhead vapors, a coker fractionator that receives the overhead vapors from the coking drum and separates them into an overhead vapor stream, intermediate liquid streams, and a flash zone gas oil stream containing a substantial amount of particulate material of varying diameter, and a hydroprocessor located downstream from said fractionator, the improvement comprising:
- a first separator located downstream of said fractionator and configured to receive the flash zone gas oil stream from the fractionator and remove the particulate material having a diameter greater than about 500 micrometers from the flash zone gas oil stream to form a first reduced particulate stream;
- and
- a second separator comprising a cyclonic separator located downstream of said first separator and configured to remove particulate material having a diameter greater than about 25 micrometers from the first reduced particulate stream to form a second reduced particulate stream.
Dependencies are inferred from the claim text.