FCC riser quick separation system： a review

• Published in: Petroleum science Vol. 13; no. 4; pp. 776 - 781
• Main Authors: Li, Zhi, Lu, Chun-Xi
• Format: Journal Article
• Language: English
• Published: Beijing China University of Petroleum (Beijing) 01.11.2016; KeAi Publishing Communications Ltd; KeAi Communications Co., Ltd
• Subjects: Catalysts; Catalytic cracking; Coking; Crude oil; Cyclone separators; Cyclones; Earth and Environmental Science; Earth Sciences; Economics and Management; Energy Policy; FCC; Fluid catalytic cracking; Fluidization; Gas separation; Industrial and Production Engineering; Industrial applications; Industrial Chemistry/Chemical Engineering; Mineral Resources; Natural gas; Post-riser system; Pressure drop; Quick separation; Review; Risers; Separation; Separators; 催化裂化原料; 催化裂化装置; 分离系统; 提升管反应器; 石油大学（北京）; 立管系统; 综述; China, People's Rep., Beijing; Quick separation; Fluidization; Post-riser system; FCC
• DOI: 10.1007/s12182-016-0119-0
• ISSN: 1672-5107

The riser reactor is the key unit in the fluid catalytic cracking（FCC） process. As the FCC feedstocks become heavier, the product mixture of oil, gas and catalysts must be separated immediately at the outlet of the riser to avoid excessive coking. The quick separation system is the core equipment in the FCC unit. China University of Petroleum（Beijing） has developed many kinds of separation system including the fender-stripping cyclone and circulating-stripping cyclone systems, which can increase the separation efficiency and reduce the pressure drop remarkably. For the inner riser system, a vortex quick separation system has been developed. It contains a vortex quick separator and an isolated shell. In order to reduce the separation time, a new type of separator called the short residence time separator system was developed. It can further reduce the separation time to less than 1 s. In this paper, the corresponding design principles,structure and industrial application of these different kinds of separation systems are reviewed. A system that can simultaneously realize quick oil gas separation, quick oil gas extraction and quick pre-stripping of catalysts at the end of the riser is the trend in the future.