石油炼制与化工 ›› 2018, Vol. 49 ›› Issue (5): 22-26.

• 加工工艺 • 上一篇    下一篇

FCC再生立管输送催化剂不畅的原因分析

彭威1,王进1,齐宏伟1,王丽婧1,史新云2   

  1. 1. 中国石油克拉玛依石化公司
    2. 中国石油新疆油田公司储运公司
  • 收稿日期:2017-09-21 修回日期:2017-12-15 出版日期:2018-05-12 发布日期:2018-05-23
  • 通讯作者: 彭威 E-mail:pwksh@petrochina.com.cn
  • 基金资助:
     

ANALYSIS OF FAULT OF CONVEYING CATALYST IN REGENERATOR STANDPIPE OF FCCU

  1.  
  • Received:2017-09-21 Revised:2017-12-15 Online:2018-05-12 Published:2018-05-23
  • Supported by:
     

摘要: 摘要:中国石油天然气股份有限公司克拉玛依石化分公司的0.8Mt/a催化裂化装置运行中出现了再生立管输送催化剂不畅的问题,表现为立管的推动力和滑阀的压降均低于设计值,同时提升管的反应温度发生波动变化。通过对比再生立管测量的轴向压力分布与原设计压力分布,表明立管内没有形成流化料柱,蓄压能力严重不足。这是松动风点堵塞和松动风量不足造成的,造成了立管内部出现失流态化架桥等。通过疏通堵塞松动点,调整松动风量,一定程度提高了立管的推动力和滑阀的压降。

关键词: 催化裂化, 再生立管, 输送, 故障, 分析

Abstract: Unsmooth catalyst transportation in the operation of the standpipe of the catalyst regenerator in 0.8Mt/a FCC unit of PetroChina Karamay Petrochemical Complex was found. The driving pressure in the standpipe and the pressure drop of the slide valve were both lower than the designed requirement, resulting in fluctuation of reaction temperature in the riser. Compared the axial pressure distribution in standpipe with the original design data, the results showed that no fluidized column was formed in the standpipe, and the pressure storage capacity is seriously insufficient due to the aeration orifices blockage and air rate insufficient, leading the catalyst bridging in the standpipe. By dredging the aeration orifices and adjusting the aeration rate, the conveying catalyst capacity of the standpipe can be improved to a certain extent.

Key words: FCC, standpipe of regenerator, transportation, fault, analysis

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