炼油技术与工程 ›› 2025, Vol. 55 ›› Issue (4): 38-41.

• 机械设备 • 上一篇    下一篇

催化裂解装置抢修时反应再生系统闷床总结

史江，赵长斌   

  1. 中海石油宁波大榭石化有限公司，浙江省宁波市 315812
  • 收稿日期:2024-12-23 出版日期:2025-04-15 发布日期:2025-04-21
  • 作者简介:史江，中级工程师，本科学历，主要从事催化裂解装置生产工作。联系电话：13586905756，E-mail：shijiang2@cnoc.com.cn。

Summary of “Bed Sealing” in the reaction-regeneration system during the emergency repair of the catalytic cracking unit

Shi Jiang，Zhao Changbin   

  1. CNOOC Ningbo Daxie Petrochemical Co., Ltd., Ningbo, Zhejiang 315812
  • Received:2024-12-23 Online:2025-04-15 Published:2025-04-21

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摘要：

中海石油宁波大榭石化有限公司2.2 Mt/a催化裂解装置双动滑阀在运行中突发导轨脱落使阀板密封失效，再生压力突然快速下降，主风机电流由220 A涨至1100 A。主风机电流快速上涨，被迫启动主风机组安全运行自保。为解决双动滑阀导轨脱落导致的滑阀单侧失效问题，采用再生器闷床技术抢修双动滑阀，历时12 h，烧焦罐闷床终止温度为554.3 ℃，沉降器温度为266.6 ℃，为恢复装置生产赢得了时间，减少开停车经济损失1200万元，证明再生器闷床操作是一项切实可行的应急操作措施。

关键词: 闷床, 催化裂解装置, 反应再生系统, 双动滑阀故障, 烧焦罐温度, 沉降器温度, 催化剂总藏量

Abstract:

During operation of the 2.2 Mt/a catalytic cracking (DCC) unit at CNOOC Ningbo Daxie Petrochemical Co., Ltd., the double-acting slide valve experienced a sudden dislocation of the guide rail and sealing failure of the valve plate. The regeneration pressure dropped rapidly, and the current of the main air blower rapidly rose from 220 A to 1,100 A, forcing the main fan unit to start safe operation and self-protection. To address the issue of the single-sided failure of the double-acting slide valve caused by the dislocation of the guide rail, the “regenerator bed sealing” technology was adopted for emergency repair of the double-acting slide valve. The emergency repair lasted for 12 hours, with the termination temperature of the “bed sealing” in the coke burning drum being 554.3 ℃ and the temperature of the settler being 266.6 ℃. This operation saved time for the resumption of production of the unit and reduced the economic losses by 12 million yuan. This proved that the “regenerator bed sealing” technology was a feasible emergency operation measure.

Key words: bed sealing, catalytic cracking unit, reaction-regeneration system, double-acting slide valve malfunction, coke burning drum temperature, settler temperature, catalyst total inventory