Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Patent
1998-07-28
2000-09-12
Griffin, Walter D.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
202 96, C10G 914
Patent
active
061173088
ABSTRACT:
A method and apparatus for at least reducing foam formation and expansion in a coking drum and for preventing foamovers. In the invention, a fluid is injected into the upper portion of the coking drum during the coking drum fill cycle in a manner effective for at least reducing pressure swings in the coking drum. The fluid is preferably of a type which provides sufficient vapor in the coking drum when added in accordance with the present invention such that the fluid acts to increase the internal pressure of the coking drum and thus counteracts pressure losses which typically occur in the live drum during the fill cycle. In another aspect of the invention, while vapor from the live drum is used to warm an empty drum operating on a different cycle, the pressure of a condensate drum which receives the vapor from the second drum is maintained in a manner effective for reducing pressure losses in the live drum during the warming operation.
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Griffin Walter D.
Preisch Nadine
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