Heat transfer enhancement pipe as well as cracking furnace and atmospheric and vacuum heating furnace including the same

US11976891B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION · CN

Inventors

• Guoqing Wang · Beijing, CN
• Junjie Liu · Shandong, CN
• Lijun Zhang · Shandong, CN
• Cong Zhou · Nanhu, CN
• Zhaobin Zhang · San Diego, US
• Shasha YANG · Beijing, CN
• Dongfa Shen · Beijing, CN
• Xiaofeng Li · Plano, US
• Shifang Yang · Beijing, CN
• Zhiguo Du · Beijing, CN
• Yonggang Zhang · Suzhou, CN
• Ying Shi · Saratoga, US
• Jinghang Guo · Beijing, CN

Key dates

• Filing date: Oct 25, 2018
• Grant date: May 7, 2024
• Expiry date: Jan 30, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F28F2270/00
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to the field of fluid heat transfer, and discloses a heat transfer enhancement pipe as well as a cracking furnace and an atmospheric and vacuum heating furnace including the same. The heat transfer enhancement pipe (1) includes a pipe body (10) of tubular shape having an inlet (100) for entering of a fluid and an outlet (101) for said fluid to flow out; internal wall of the pipe body (10) is provided with a fin (11) protruding towards interior of the pipe body (10), the fin (11) spirally extends in an axial direction of the pipe body (10), wherein a height of the fin (11) gradually increases from one end in at least a part extension of the fin. The heat transfer enhancement pipe can reduce thermal stress of itself, thereby increasing service life of the heat transfer enhancement pipe.