Cracking tube having helical fins

B - Operations – Transporting – 01 – F

Patent

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Details

B01F 5/00 (2006.01) F27D 27/00 (2010.01) C10G 9/20 (2006.01) F28F 1/00 (2006.01) F28F 1/40 (2006.01) B01F 5/06 (2006.01)

Patent

CA 2505518

A cracking tube (50) for use in thermal cracking furnaces for producing ethylene or the like has fins (1) formed on an inner surface thereof and inclined with respect to an axis of the tube for stirring a fluid inside the tube. The fins are arranged discretely on one or a plurality of helical loci, and the tube inner surface has regions (ZB) wherein no fins are present over the entire axial length of the tube from one axial end of the tube to the other axial end thereof.

Tube de craquage (50) utilisé dans un four à réaction pyrolytique pour la fabrication d'éthylène et analogue, dans lequel les ailettes (1) à effet d'agitation de fluide sont formées sur la surface intérieure du tube, diagonalement par rapport à l'axe du tube, et de manière intermittente dans la direction d'une spirale tout en définissant une piste parmi de multiples pistes spiralées, et où des zones (ZB) sans ailettes sur la surface intérieure du tube sont présentes sur toute la surface axiale dudit tube, depuis une face d'extrémité jusqu'à l'autre face d'extrémité dudit tube.

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