Patent ID: 6117308
Filing Date: 2000-09-12
Classification: C10B,C10G

Abstract:
A method of reducing foam formation in a coking drum of a petroleum coking system, said petroleum coking system receiving a coker feed material, said coking drum having an upper pressure and said coking drum being operated in a cyclical manner including (a) a fill cycle wherein at least a portion of said coker feed material flows into said coking drum to form a layer of coke, and (b) a second cycle wherein said portion of said coker feed material does not flow into said coking drum and during at least a portion of which said coke is removed from said coking drum, said method comprising the step of controlling said upper pressure, during at least a portion of said fill cycle, by adding a fluid to said coking drum of a type and in a manner effective for at least reducing pressure swings in said coking drum, wherein said fluid is a material other than said coker feed material.