Patent ID: 9205400
Filing Date: 2015-12-08
Classification: B01J,C07C,C10G,F28D,F28F

Abstract:
1. An ethylene cracking furnace, comprising: one or more radiant sections, wherein at least one radiant section comprises a bottom burner and/or a side burner, and one or more of radiant coils arranged along a longitudinal direction of the radiant section, wherein the radiant coil is an at least two-pass coil having one downstream tube and N upstream tubes in two adjacent passes, N being an integer from 2 to 8; and a manifold connected to an inlet end of the downstream tube of said at least two-pass coil, and connected to an outlet end of each of the N upstream tubes of said at least two-pass coil through a curved connector, wherein the curved connector comprises a U-shaped elbow and an S-shaped elbow, of which one connects to the outlet end of a corresponding upstream tube and the other connects to an inlet end of the manifold, wherein the N upstream tubes are evenly divided into a first group and a second group, respectively arranged at two sides of the downstream tube, and wherein all of the N upstream tubes and the downstream tube reside in a common plane.