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›› 2017, Vol. 17 ›› Issue (1): 11-20.DOI: 10.12034/j.issn.1009-606X.216252

• 流动与传递 • 上一篇    下一篇

带有环流预汽提的旋流快分系统动态压力的小波分析

李智1,李萌2,张博峰2,卢春喜1   

  1. 1. 中国石油大学(北京)重质油国家重点实验室
    2. 中国石油大学(北京) 重质油国家重点实验室
  • 收稿日期:2016-07-20 修回日期:2016-08-17 出版日期:2017-02-20 发布日期:2017-02-22
  • 通讯作者: 卢春喜

Wavelet Analysis of Dynamic Pressure in Vortex Quick Separation System with Annular Pre-stripper

LI Zhi 1,LI Meng 1,ZHANG Bo-feng 1,LU Chun-xi 2   

  1. 1. State Key Laboratory of Heavy Oil, China University of Petroleum
    2. State Key Laboratory of Heavy Oil, China University of Petroleum(Beijing)
  • Received:2016-07-20 Revised:2016-08-17 Online:2017-02-20 Published:2017-02-22
  • Contact: LU Chun-xi

摘要: 测量了环流预汽提与带隔流筒的旋流快分系统(SVQS)相耦合的大型冷模实验装置的动态压力特性. 结果表明,旋流快分系统轴向压力脉动曲线具有很强的相似性,脉动强度随旋流头喷出口气速、颗粒质量流率增大而增大,压力脉动标准偏差与喷出气速、颗粒质量流率存在对应关系. 由实验结果关联获得的脉动标准偏差与喷出气速、颗粒质量流率经验公式,可用于预测特定工况下工业装置的颗粒质量流率. 通过小波分析,装置主频范围为1.5~12.5 Hz,周期约为7~10 s,旋流快分头上部空间的压力脉动较大,存在不稳定的漩涡区,发现周向脉动基本一致,径向在r/R=0.4~0.7时漩涡区的压力脉动强度较低. 为了使装置能稳定运行,建议快分头的喷出气速为18~24 m/s,颗粒质量流率在超过90 kg/(m2?s)范围内.

关键词: 提升管出口旋流快分, 气固分离, 压力脉动, 小波分析

Abstract: An experiment was performed to measure the axial pressure fluctuation of the vortex quick separation system with annular pre-stripper. In order to give suggestions to the operation stability of actual industrial device through analyzing the pressure fluctuation characteristics and mechanism. As is shown in the experimental results, the axial pressure fluctuations have great similarity in the shape of the curves. The strength of the fluctuation increased with ejection gas velocity and the particulate mass flow rate increasing. Through the wavelet analysis, the frequency range of this device is approximately 1.5~12.5 Hz with a period of 7~10 s. It is found that there is an enormous pressure fluctuation above the quick separator and a vortex zone is found there. The circumferential pressure pulsations are basically the same, and the radial r/R=0.4~0.7 has a bigger vortex zone and the pressure fluctuation intensity is lower. As for industrial device operating stability, it is suggested that the injection gas velocity of the quick separation head is in the range of 18~24 m/s and the riser particle mass flow rate is more than 90 kg/(m2?s), the device can run stability.

Key words: riser termination device, gas-solid separation, pressure fluctuation, wavelet analysis

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