Integrated heavy oil pyrolysis process
AssigneeStone & Webster Engineering Corp.
InventorsHerman H. Woebcke, Swami Narayanan, Axel R. Johnson
Life of this patent
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Abstract
An apparatus for the cracking of a heavy hydrocarbon feedstock comprising a pre-pyrolysis cracker for treating the feedstock at elevated temperatures and pressures; a primary separator for separating the effluent from the pre-pyrolysis cracker into a heavy fuel oil fraction and a treated heavy hydrocarbon fraction; a pyrolysis furnace having a convection section for preheating and two radiant sections for partially cracking the treated heavy hydrocarbon and cracking a light hydrocarbon feedstock, a DUOCRACKER for completely cracking the heavy fraction while quenching the light fraction and a quencher for quenching the composite stream from the DUOCRACKER.
Claims1
An apparatus for cracking a heavy hydrocarbon feedstock to produce olefins comprising:
- (a) a pre-pyrolysis cracker including means for treating heavy hydrocarbon feedstock at elevated pressures and temperatures;
- (b) a primary separator for separating the effluent from the pre-pyrolysis cracker into a heavy fuel oil fraction and a treated heavy hydrocarbon fraction;
- (c) a pyrolysis furnace having means defining a convection section for preheating the treated heavy hydrocarbon fraction from the primary separator and for preheating a light hydrocarbon feedstock, means defining a first radiant section for partially cracking the treated heavy hydrocarbon fraction, and means defining a second and radiant section for cracking the light hydrocarbon feedstock;
- (d) means defining a DUOCRACKER for completely cracking the partially cracked heavy hydrocarbon stream emanating from the pyrolysis furnace while quenching the cracked light hydrocarbon stream from the pyrolysis furnace;
- and
- (e) a quencher for quenching the composite stream of heavy and light hydrocarbons from the DUOCRACKER to terminate the reactions.
Dependencies are inferred from the claim text.