化工进展 ›› 2022, Vol. 41 ›› Issue (7): 3455-3464.DOI: 10.16085/j.issn.1000-6613.2021-1752

• 化工过程与装备 • 上一篇    下一篇

旋风分离器内气相旋转流动态特性分析与表征

解明1(), 孙立强1(), 宋健斐2, 魏耀东2   

  1. 1.河北石油职业技术大学,河北 承德 067000
    2.中国石油大学(北京)重质油国家重点实验室,北京 102249
  • 收稿日期:2021-08-16 修回日期:2021-09-28 出版日期:2022-07-25 发布日期:2022-07-23
  • 通讯作者: 孙立强
  • 作者简介:解明(1986—),女,硕士,讲师,从事石油化工装备方面的研究工作。E-mail:nevergiveup80s@163.com
  • 基金资助:
    河北省自然科学基金(B2021411001);河北省高等学校科学技术研究项目(QN2022065);国家自然科学基金(21776305)

Analysis and characterization of gas swirling flow dynamic characteristics in a cyclone separator

XIE Ming1(), SUN Liqiang1(), SONG Jianfei2, WEI Yaodong2   

  1. 1.Hebei Petroleum University of Technology, Chengde 067000, Hebei, China
    2.State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
  • Received:2021-08-16 Revised:2021-09-28 Online:2022-07-25 Published:2022-07-23
  • Contact: SUN Liqiang

摘要:

旋风分离器内的气相旋转流具有很强的动态特性,表现为流场瞬时参数随时间波动变化。为了对旋风分离器内气相旋转流动态特性进行表征,本文基于热线/热膜风速仪(HWFA)和动态压力传感器测量的旋风分离器内瞬时切向速度和瞬时压力,从时域和频域两个方面进行了分析。结果表明,旋风分离器内瞬时切向速度信号时域上的波形分布与旋转流的摆动存在联系,时域上的标准偏差可以直观地表征旋风分离器内旋转流的波动强度;频域的主频和功率谱密度(PSD)可以表征旋转流动态参数波动的准周期行为、传递行为和强度衰减特征,也是旋转流摆动行为及其影响范围的反映。基于瞬时切向速度和瞬时压力的时域和频域分析能较好地反映旋转流流场的波动特点,均可用于表征旋风分离器内气相旋转流的动态特性。

关键词: 旋风分离器, 旋转流, 动态特性, 时频分析, 表征方法

Abstract:

Gas swirling flow in the cyclone separator exists strong dynamic characteristics, which are characterized by the instantaneous parameters fluctuate over time. In order to characterize the dynamic characteristics of the gas swirling flow in a cyclone separator, the instantaneous tangential velocity and instantaneous pressure in the cyclone measured by the hot wire/film anemometer (HWFA) and dynamic pressure sensor were analyzed on both time and frequency domain. The results showed that the waveform distribution of the instantaneous tangential velocity in the time domain wass related to the gas swirling flow swing, and the standard deviation was dependent on the fluctuation intensity of gas swirling flow. The dominant frequency and power spectral density (PSD) in the frequency domain were used to illustrate the quasi-periodic behavior, transmission behavior and attenuation characteristics of the swirling flow dynamic parameter. It is also the reflection of the swirling flow swing behavior and its range of influence. Therefore, time-frequency analysis based on the instantaneous tangent velocity and the instantaneous pressure might better indicate the fluctuation characteristics of the swirling flow, consequently, which can be applied to characterize the dynamic characteristics of the gas swirling flow in the cyclone separator.

Key words: cyclone separator, swirling flow, dynamic characteristics, time-frequency analysis, characterization method

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