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. 02, 2014
Filed:
Oct. 26, 2010
Xiou He, Beijing, CN;
Changli LI, Beijing, CN;
Zhaobin Zhang, Beijing, CN;
Jingkun Liu, Beijing, CN;
Mujun Yuan, Beijing, CN;
Cong Zhou, Beijing, CN;
Yuping Guo, Beijing, CN;
Yonghua Zhao, Beijing, CN;
Hainü Shen, Beijing, CN;
Xiou He, Beijing, CN;
Changli Li, Beijing, CN;
Zhaobin Zhang, Beijing, CN;
Jingkun Liu, Beijing, CN;
Mujun Yuan, Beijing, CN;
Cong Zhou, Beijing, CN;
Yuping Guo, Beijing, CN;
Yonghua Zhao, Beijing, CN;
Hainü Shen, Beijing, CN;
China Petroleum & Chemical Corporation, Beijing, CN;
SINOPEC Engineering Incorporation, Beijing, CN;
China Petroleum & Chemical Corporation, Beijing Institute of Chemical Industry, Beijing, CN;
Abstract
The invention relates to an ethylene cracking furnace having a multi-pass radiant coil, comprising at least one radiant section. In the radiant section there are provided with bottom burners and/or sidewall burners, and at least one set of multi-pass radiant coil longitudinally arranged in the radiant section. The multi-pass radiant coil is a four- to ten-pass type radiant coil. At least one tube of the multi-pass radiant coil is arranged to be spatially adjacent to a tube which is not consecutive to said at least one tube. With this arrangement, the thermal radiation influence between tubes with high temperature can be reduced, so that the tubes with low temperature can absorb the radiation heat from the tubes with high temperature. Therefore, the surface temperature of the tubes with high temperature can be reduced, thus extending the lifetime of the radiant coil and the operational cycle of the cracking furnace.