Tube for a steam cracking furnace having a segment with an elliptical or lobed cross section
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United States of America Patent
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Jan 3, 2023
Grant Date -
Dec 3, 2020
app pub date -
May 29, 2020
filing date -
May 31, 2019
priority date (Note) -
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Abstract
A tube for a steam cracking furnace comprising: at least one downstream tubular segment of circular section having a main diameter; at least one twisted tubular segment having a length less than a quarter of the length of the tube, and comprising: a central part with an elliptical or lobed section, having a helical pitch between one times and ten times the main diameter, and an aspect ratio of the elliptical or lobed section between 0.5 and 0.8; an upstream transition part establishing a geometric transition between the central part and a tubular segment of circular section; a downstream transition part establishing a geometric transition between the central part and the downstream tubular segment, with a fluid being intended to flow from the upstream transition part to the downstream transition part.
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