The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 2014
Filed:
Oct. 15, 2009
Xiou He, Beijing, CN;
Guoqing Wang, Beijing, CN;
Changli LI, Beijing, CN;
Lijun Zhang, Beijing, CN;
Jinke LI, Jiangsu, CN;
Chen Shao, Beijing, CN;
Guang LI, Beijing, CN;
Yuping Guo, Beijing, CN;
Xiou He, Beijing, CN;
Guoqing Wang, Beijing, CN;
Changli Li, Beijing, CN;
Lijun Zhang, Beijing, CN;
Jinke Li, Jiangsu, CN;
Chen Shao, Beijing, CN;
Guang Li, Beijing, CN;
Yuping Guo, Beijing, CN;
China Petroleum & Chemical Corp., Beijing, CN;
Nanjing Industrial Furnace Institute of Tianhua of Chemical Machinery & Automation, Nanjing, CN;
Sinopac Engineering Incorporation, Beijing, CN;
Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corp., Beijing, CN;
Abstract
An ethylene cracking furnace comprising a high pressure steam drum (), a convection section (), a radiant section (), multiple groups of radiant coils () arranged vertically in the firebox of radiant section, burners () and transfer line exchangers (), each radiant coil comprising a first-pass tube (), a second-pass tube () and a connection member (); feedstocks being introduced into an inlet end of the first-pass tube and outflow from an outlet end of the second-pass tube, said first-pass tube () and said second-pass tube () are non-split coils, and the centerlines of the respective radiant tubes () are within a common plane; said connection member () is a tridimensional structural member comprising an inlet bending tube (), a return bending tube () and an outlet bending tube (); said inlet bending tubes () and said outlet bending tubes () are arranged at two sides of the plane containing the centerlines of said first-pass tubes () and said second-pass tubes (), respectively; the projections of the respective connection members () in a side view are the same curve line that is symmetrical, continuous and closed; the inner diameters of said radiant coils () is varied at least once along the length of the tubes.