Separation process and apparatus for removal of particulate material from flash zone gas oil
First Claim
1. 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.
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Accused Products
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.
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Citations
33 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification