Concentrating evaporators – Film type – Centrifugal
Patent
1979-10-25
1982-02-02
Yudkoff, Norman
Concentrating evaporators
Film type
Centrifugal
159 13A, 159 49, B01D 122
Patent
active
043137857
ABSTRACT:
Apparatus is disclosed for treating a slurry of cuttings in an oil base oil well drilling fluid, such as is typically used in drilling production wells. The cuttings having a coating of hydrocarbon substances after treatment in the apparatus are sufficiently free of hydrocarbons to be dischargeable into a body of water without creating an environmental problem or a discernible film on the surface of the water. A two-stage continuous process is used for raising the temperature of a relatively thin layer of pulverized rock fragments or other cuttings to effect serial evolution of hydrocarbons in gaseous form. In the first stage, the incoming rock fragments are forced into a thin annular region bounded by a surrounding wall of corrosion-resistent metal raised to a temperature at which the bulk of hydrocarbon products are gasified for removal. In the second stage, the pulverized product of the first stage is forced into a cylindrical annular region from which the remainder of the hydrocarbon products are withdrawn. A portion of the gaseous products formed can be mixed with air or oxygen for combustion to assist in meeting the energy needs of the apparatus.
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Jacobson Harvey B.
Yudkoff Norman
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