Oil recovery process and apparatus for oil refinery waste
First Claim
1. A process for recovery of oil from oily waste having high water content, a heavy hydrocarbon portion and inert solids, comprising:
- mixing the waste with fluidizing oil to form a mixture;
evaporating the water from the mixture to dewater the mixture; and
feeding the dewatered mixture to a delayed coking process, including directing the dewatered mixture into a coke drum containing conventional coke feedstock and subjecting the dewatered mixture in the coke drum to coking conditions,whereby the heavy hydrocarbon portion changes to coke and light hydrocarbon material, the inert solids become trapped in the coke, and the fluidizing oil vaporizes.
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Accused Products
Abstract
A process and apparatus for the recovery of oil from aqueous oil refinery waste involves mixing the waste with a fluidizing oil and evaporating the water from the mixture in a plurality of stages. The dewatered mixture is fed to a delayed coking system in which a conventional coker feedstock is being used. The heavy hydrocarbon portion of the dewatered mixture changes to coke and light hydrocarbon material, the inert solids become trapped in the coke, and the fluidizing oil vaporizes. A stream of heavy coker gas oil is fed from a fractionator in the delayed coking system to a fluidizing tank where it is mixed with the sludge to define the fluidizing oil. Another hot stream of hydrocarbon material from the coker fractionator is sent to the evaporator section to provide the heat for evaporation.
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Citations
23 Claims
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1. A process for recovery of oil from oily waste having high water content, a heavy hydrocarbon portion and inert solids, comprising:
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mixing the waste with fluidizing oil to form a mixture; evaporating the water from the mixture to dewater the mixture; and feeding the dewatered mixture to a delayed coking process, including directing the dewatered mixture into a coke drum containing conventional coke feedstock and subjecting the dewatered mixture in the coke drum to coking conditions, whereby the heavy hydrocarbon portion changes to coke and light hydrocarbon material, the inert solids become trapped in the coke, and the fluidizing oil vaporizes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Apparatus for disposing of oily waste having high water content, a heavy hydrocarbon portion and inert solids, comprising:
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means for mixing the waste with fluidizing oil to form a mixture; means for evaporating the water form the mixture, said evaporating means producing vapors of water and fluidizing oil to leave a dewatered mixture of waste and fluidizing oil; means for recovering fluidizing oil from the vapors of water and fluidizing oil; means for producing coke by a delayed coking method, said coke producing means including a coke drum having an inlet at its bottom, a coker heater heaving an inlet, a coker fractionator, and means for conducting conventional coker feedstock through the coker heater to the coke drum; and means for feeding the dewatered mixture of waste and fluidizing oil from said evaporating means to said coke producing means, whereby the heavy hydrocarbon portion of the dewatered mixture changes to coke and light hydrocarbon material, the inert solids become trapped in the coke, and the fluidizing oil vaporizes. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification