A TUBULAR CRACKING FURNACE

摘要

A tube type cracking furnace, especially an ethylene-cracking furnace includes a convection section (2) and a radiation section (5). At least one enhanced heat transfer member (7) is located in at least one way of a single cracking furnace tube (3) of the radiation section (5). The at least one enhanced heat transfer member (7) includes a first enhanced heat transfer member (7). The first enhanced heat transfer member (7) is placed between 10D and 25D ahead of the limit temperature point of the cracking furnace tube wall, in which D is the inside diameter of the cracking furnace tube (3) which is provided with the enhanced heat transfer member (7). The tube type cracking furnace can make these enhanced heat transfer members (7) distributed well in the radiation section furnace tube (3), when the number of the enhanced heat transfer member (7) added in the radiation section furnace tube (3) is constant, to achieve the optimal effect of enhancing heat transfer.