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US 4,906,442 AGranted
Process and apparatus for the production of olefins from both heavy and light hydrocarbons
AssigneeStone & Webster Engineering Corp.
InventorsAxel R. Johnson, S. Narayanan, Herman N. Woebcke
Life of this patent
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Abstract
The invention is a pyrolysis furnace for cracking heavy oils to olefins. The furnace includes a convection zone and a radiation zone. In parallel streams, the heavy stream and a stream diluent are heated in the convection zone to the point of partial thermal cracking while in the other stream a lighter oil and steam are cracked to produce olefins. The hot, olefinic light stream is then mixed with the heated heavy stream and further cracked in the radiation zone.
Claims4
A pyrolysis furnace for cracking a heavy hydrocarbon and a light hydrocarbon simultaneously comprising:
- (a) a convection section;
- (b) a radiant section;
- (c) convection coils for the heavy hydrocarbon;
- (d) convection coils for the light hydrocarbon;
- (e) radiant zone coils in the radiant zone in direct communication with the convection coils for the light hydrocarbon;
- (f) a first set of burners in the radiant zone for providing a discrete quantity of heat for high severity cracking of the light hydrocarbon;
- (g) radiant coils in the radiant zone in direct communication with the convection coils for the heavy hydrocarbon;
- (h) a second set of burners in the radiant zone for providing a discrete quantity of heat to partially crack the heavy hydrocarbon;
- (i) an isothermal common coil in the radiant zone in which the radiant coils in communication with the heavy hydrocarbon convection coils and the light hydrocarbon convection coils terminate;
- and
- (j) a third set of burners in the radiant zone about the isothermal common coil for providing a discrete quantity of heat to the common coil to completely crack the heavy hydrocarbon while the light hydrocarbon is quenched.
8 more elements
Dependencies are inferred from the claim text.