Residual oil coking scheme
AssigneeUop LLC
InventorJames F. McGehee
Life of this patent
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Abstract
A coking process and apparatus may include cracking a hydrocarbon feed stream with a catalyst, generating a hot flue gas from regenerating said catalyst, directing the hot flue gas into a spray contactor, spraying a heavy residual oil into the spray contactor, and coking the heavy residual oil utilizing the hot flue gas as a heat source. The hydrocarbon feed stream and the heavy residual oil may each or both be generated by a solvent deasphalter. The coking process produces a solid coke product and volatile hydrocarbons which leave with the hot gas and may be burned in an oxidizer to generate steam with the pressure energy recovered by a turbo-expander.
Claims12
A coking process, comprising:
- cracking a hydrocarbon feed stream with a catalyst to form a cracked hydrocarbon products stream and a spent catalyst;
- regenerating the spent catalyst so that a regenerated catalyst and a hot flue gas are obtained, wherein the hot flue gas comprises excess oxygen in a range from about 2 wt-% to about 5 wt-%;
- directing the hot flue gas into a spray contactor, while concurrently spraying a heavy residual oil into the spray contactor so that,
- a) the heavy residual oil and the hot flue gas are mixed, and
- b) the heavy residual oil is converted to obtain at least volatile products and a free-flowing solids stream comprising coke particles.
A fluid catalytic cracking (FCC) process, comprising:
- deasphalting a crude oil stream to form a hydrocarbon feed stream and a heavy residual oil;
- cracking the hydrocarbon feed stream with a catalyst in a reactor having a riser section to form a cracked hydrocarbon products stream and a spent catalyst;
- regenerating the spent catalyst so that a regenerated catalyst and a hot flue gas are obtained, wherein the hot flue gas comprises excess oxygen in a range from about 2 wt-% to about 5 wt-%;
- recycling the regenerated catalyst to the riser section;
- directing the hot flue gas into a spray contactor, while concurrently spraying the heavy residual oil into the spray contactor so that,
- a) the heavy residual oil and the hot flue gas are mixed, and
- b) the heavy residual oil is converted to obtain at least volatile products forming a stream of hydrocarbon-laden gas and a free-flowing solids stream comprising coke particles;
- directing the stream of hydrocarbon-laden gas to an oxidation zone;
- and
- combusting the hydrocarbon-laden gas in the oxidation zone.
Dependencies are inferred from the claim text.