Abstract: The development history，direction and current status of steam cracking technology are reviewed. The major progress of steam cracking technology in recent years include the technology related to the radiant coil，energy saving and environmental protection，single furnace capacity increase，revamp of cracking furnace，advanced control and optimization in operation. Some technologies have good effect in operation，and some technologies have problems or need to make improvement. The development history of Sinopec CBL steam cracking technology is reviewed，and the following aspects are included：process technology，major equipment domestic fabrication，engineering design and large-scale of cracking furnace capacity. The application of CBL cracking technology in furnace revamp，Tianjing and Zhenhai 1000 kt/a ethylene unit is introduced. The application of 150 kt/a CBL-Ⅶ cracking furnace and the development of 200 kt/a CBL cracking furnace are also introduced. The bottleneck of steam cracking technology is pointed out to be the anti-coke technology，and the problems solved in the different stages during 30 years developing course are summarized，and then CBL technology finally entered the international market. Also the technical features are introduced，and the advantages of CBL cracking furnace are also introduced.

Key words: steam cracking, cracking furnace, CBL, domestic

摘要： 简述了蒸汽裂解技术的发展过程、发展方向以及目前的现状。介绍了目前裂解技术在与辐射炉管相关技术、与节能环保相关技术、大型化、裂解炉改造、先进控制及优化等方面的主要进展，并介绍了哪些技术效果好、哪些技术仍然存在问题。简要回顾了中国石化北方炉（CBL）裂解技术的发展过程，以及工艺国产化、设备国产化、工程设计国产化以及大型化的情况。介绍了CBL裂解技术在裂解炉节能改造、天津与镇海1000 kt/a乙烯装置中的工业应用情况、150 CBL-Ⅶ型kt/a裂解炉的工业应用情况及200 kt/a裂解炉的开发情况。最后指出了蒸汽裂解技术取得突破进展所存在的瓶颈在于防止结焦，总结了CBL技术经历30年发展并最终进入国际市场的过程中每个阶段所解决的问题。介绍了CBL裂解技术特点，并指出了其与国外技术相比所占的优势。

关键词: 蒸汽裂解, 裂解炉, 北方炉, 国产化