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. 05, 2017
Filed:
Oct. 12, 2011
Xiou He, Beijing, CN;
Jingkun Liu, Beijing, CN;
Changli LI, Beijing, CN;
Hainü Shen, Beijing, CN;
Yuping Guo, Beijing, CN;
Chen Shao, Beijing, CN;
Xiou He, Beijing, CN;
Jingkun Liu, Beijing, CN;
Changli Li, Beijing, CN;
Hainü Shen, Beijing, CN;
Yuping Guo, Beijing, CN;
Chen Shao, Beijing, CN;
China Petroleum & Chemical Corporation, Beijing, CN;
SINOPEC Engineering Incorporation, Beijing, CN;
Abstract
An ethylene cracking furnace is provided. The ethylene cracking furnace includes at least one radiant section. The at least one radiant section includes bottom burners and/or sidewall burners, and at least one radiant coil arranged in the radiant section. The radiant coil includes at least an upstream pass tube and a downstream pass tube, the upstream pass tube being configured as an inner tube, and the downstream pass tube being configured as an outer tube surrounding the inner tube and having a closed end. The inner tube defines an inner space forming an upstream flow path. A gap defined between the inner tube and the outer tube forms an downstream flow path.