ETHYLENE CRACKING FURNACE WITH MULTIPASS RADIANT FURNACE TUBES

摘要

An ethylene cracking furnace with multipass radiant furnace tubes comprises at least a radiant section, a bottom burner and/or a side wall burner being arranged in the radiant section, and at least one set of multipass radiant furnace tubes being arranged longitudinally in the radiant section. The multipass radiant furnace tubes are four to ten rows of radiant tubes and at least one row of furnace tube thereof, does not neighbor another connecting one in space. By means of this arrangement, the influence of thermal radiant among high temperature tube rows can be reduced and the tubes with low wall temperature can absorb radiant heat from the tubes with high wall temperature, which is advantageous to reduce the surface temperature of furnace tube with a high temperature and to achieve the object of prolonging operating period of cracking furnace and service lifetime of radiant tubes.