Foster Wheeler USA Corporation

Foster Wheeler Energy Corporation

Rino L Godino

John D Elliott, Jr

Michael John McGrath

Robert R DeBiase

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.

Oil recovery process and apparatus for oil refinery waste

Wet refinery sludges are disposed of by feeding them into a delayed coking process. The sludge is fed to the blowdown drum of the delayed coking process and mixed with oil condensed from the coke drum overhead, and the resulting sludge-oil mixture is fed to the coke drum where it is converted into coke. In order to remove the water from the sludge, a portion of the sludge-oil mixture is heated and recirculated to the blowdown drum where it provides the heat for drying and heating the sludge. The recirculating sludge-oil mixture is heated by a low level heat source, such as one of the fluid streams taken off from the fractionator.

Sludge dewatering and destruction within a delayed coking process

A fractionator for yielding petroleum products in association with a delayed coking process includes a bottom having a pool of petroleum residue and recycle liquid, a flash zone above the pool, an inlet line for conveying to the flash zone product vapors which are relatively warm with respect to the pool, and a baffle positioned between the flash zone and the pool to isolate the relatively warm product vapors from the pool and, thereby, reduce condensation of the product vapors. The fractionator also includes a wash zone, above the flash zone, in which the product vapors condense, and a downwardly pointed frustoconical element, an annular trough and an arrangement of conduits for conducting the condensed recycle liquid from the wash zone to the pool, out of contact with the product vapors in the flash zone.

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Livingston, NJ, United States of America

Rino L Godino