Piping
AssigneeTechnip France
InventorsColin Gerald Caro, Philip Lloyd Birch, William Tallis
Life of this patent
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Abstract
The invention relates to piping for use as a pyrolysis tube in a cracking furnace. The tube is formed such that it has at least one section whose centreline curves in three dimensions, to induce swirl flow in the tube. Preferably, the tube is formed as a helix, more preferably a low-amplitude helix.
Claims13
A cracking furnace with at least one pyrolysis tube passing through the furnace, the pyrolysis tube defining a flow passage with a cross-section that is substantially circular, wherein the flow passage of substantially circular cross-section has at least one pyrolysis tube portion having an internal diameter, the pyrolysis tube portion having a helical centerline that has an amplitude and curves in three dimensions, and wherein the amplitude of the helical centerline is less than or equal to the internal diameter of the pyrolysis tube portion.
A cracking furnace with at least one pyrolysis tube passing through the furnace, the pyrolysis tube defining a flow passage with a cross-section that is substantially circular, wherein the flow passage of substantially circular cross-section has at least one pyrolysis tube portion having an internal diameter, the pyrolysis tube portion having a helical centerline that has an amplitude and curves in three dimensions, and wherein the amplitude of the helical centerline is less than or equal to the internal diameter of the pyrolysis tube portion, and wherein the helical centerline has a helix angle that is less than or equal to 45°.
Dependencies are inferred from the claim text.