石油学报(石油加工) ›› 2021, Vol. 37 ›› Issue (1): 113-120.doi: 10.3969/j.issn.1001-8719.2021.01.011

• 研究报告 • 上一篇    下一篇

FCC装置再生立管输送催化剂的影响因素

彭威1, 刘艳升1, 黄炳庆2, 向继刚2   

  1. 1. 中国石油大学(北京)重质油国家重点实验室,北京102249; 2. 中国石油 克拉玛依石化公司,新疆 克拉玛依 834003
  • 收稿日期:2019-11-04 修回日期:2020-04-29 出版日期:2021-01-25 发布日期:2021-01-12
  • 通讯作者: 刘艳升,男,教授,博士,从事传递与分享工程,精馏工艺,设备开发及故障诊断等方面的研究,E-mail:wsuper@cup.edu.cn E-mail:pwksh@petrochina.com.cn
  • 作者简介:第一作者:彭威,男,工程师,博士研究生,从事催化裂化加工工艺与工程研究,E-mail: pwksh@petrochina.com.cn
  • 基金资助:
    中国石油大学(北京)克拉玛依校区科研基金项目(RCYJ2016B-02-001)资助

Influencing Factors of Catalyst Transport in Regeneration Standpipe for FCC Unit

PENG Wei1, LIU Yansheng1, HUANG Bingqing2, XIANG Jigang2   

  1. 1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China; 2. Karamay Petrochemical Company, CNPC, Karamay 834003, China
  • Received:2019-11-04 Revised:2020-04-29 Online:2021-01-25 Published:2021-01-12

摘要: 在1.0 Mt/a FCC装置上,考察了再生立管输送催化剂的影响因素和调控方法。通过测量不同工况时再生立管轴向压力和提升管反应温度,以及计算立管内表观气体速率,监测立管内部催化剂输送状态。结果表明:沿立管从上至下,立管轴向压力分布为非线性,压力梯度减小;反应温度波动幅度随松动风流量增加而增大。松动风流量为540 m3/h时,立管内气体表观速率范围为0.04~0.9 m/s;催化剂流态出现填充流是滑阀压降降低的主要原因。在松动风量、滑阀压降、反应温度等参数优化的基础上,建立了三者相互关联的立管操作控制图,提出了最佳松动风流量的概念,保障装置平稳运行。

关键词: 催化裂化(FCC), 流态, 压力分布, 松动风, 反应温度

Abstract: Impact factors and control methods for catalyst transport in the regeneration standpipe were investigated for a 1.0 Mt/a FCC unit. Catalyst transport flow patterns were monitored through measurement of axial pressure in the standpipe and riser reaction temperature under different operation conditions, as well as apparent standpipe gas velocity calculation. The above results suggested that pressure distribution is nonlinear in the standpipe and pressure gradient declines from top to bottom inside the standpipe. It was also found that the reaction temperature fluctuation range increases with aeration velocity. At aeration flow rate 540 m3/h, apparent gas velocity in the standpipe is in the range of 0.04 to 0.9 m/s. The main reason for slide valve pressure-drop decrease is the formation of packed bed flow when apparent gas velocity above the slide valve is less than minimum fluidization velocity. Based on above analysis, the control diagram for catalyst transport operation in the standpipe was established. In addition, the concept of optimum aeration flow rate was proposed to guide FCC unit operation.

Key words: fluid catalytic cracking(FCC), flow pattern, pressure distribution, aeration, reaction temperature

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