旋风分离器有无灰斗对气相流场动态特性的影响

孙立强; 王迪; 宋健斐; 王江云; 魏耀东

doi:10.11949/j.issn.0438-1157.20181443

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旋风分离器有无灰斗对气相流场动态特性的影响

分离工程 | 更新时间：2026-07-24

- 旋风分离器有无灰斗对气相流场动态特性的影响
- Effect of ashless separator on dynamic characteristics of gas phase flow field in cyclone separator
- 化工学报 2019年70卷第6期页码：2202-2210
- 作者机构：
  
  1.中国石油大学（北京）重质油国家重点实验室，北京 102249
  2.过程流体过滤与分离技术北京重点实验室，北京 102249
  3.中国石油大学（北京）克拉玛依校区工学院，新疆克拉玛依 834000
- 作者简介：
  
  孙立强(1986—)，男，博士研究生，讲师，sunlq_cup@126.com
  魏耀东(1958—)，男，博士，教授， weiyd@cup.edu.cn
- 基金信息：
  
  国家自然科学基金项目(21776305;21566038);中国石油大学（北京）克拉玛依校区科研启动基金项目(RCYJ2016B-02-002)
- DOI：10.11949/j.issn.0438-1157.20181443
  中图分类号： TQ 051.8
- 收稿：2018-12-05，
  
  修回：2019-03-25，
  
  网络首发：2020-06-15，
  
  纸质出版：2019-06-05
- 稿件说明：
移动端阅览
孙立强, 王迪, 宋健斐, 王江云, 魏耀东. 旋风分离器有无灰斗对气相流场动态特性的影响[J]. 化工学报, 2019, 70(6): 2202-2210

SUN Liqiang, WANG Di, SONG Jianfei, WANG Jiangyun, WEI Yaodong. Effect of ashless separator on dynamic characteristics of gas phase flow field in cyclone separator[J]. CIESC Journal, 2019, 70(6): 2202-2210
孙立强, 王迪, 宋健斐, 王江云, 魏耀东. 旋风分离器有无灰斗对气相流场动态特性的影响[J]. 化工学报, 2019, 70(6): 2202-2210 DOI： 10.11949/j.issn.0438-1157.20181443.

SUN Liqiang, WANG Di, SONG Jianfei, WANG Jiangyun, WEI Yaodong. Effect of ashless separator on dynamic characteristics of gas phase flow field in cyclone separator[J]. CIESC Journal, 2019, 70(6): 2202-2210 DOI： 10.11949/j.issn.0438-1157.20181443.

摘要

旋风分离器底端的排尘口依据气固分离工艺的要求分别采用有灰斗或无灰斗结构。但灰斗是否存在对旋风分离器内部流场影响的研究尚显不足。为此，采用热线风速仪对排尘口有灰斗和无灰斗的旋风分离器气相流场的切向速度进行了测量。结果表明旋风分离器内旋转流具有较强的不稳定性，表现为瞬时切向的速度低频高幅值波动变化。灰斗的存在进一步导致了排尘口附近瞬时切向速度的强烈波动。通过对瞬时切向速度的频谱分析表明，有灰斗结构的旋风分离器瞬时切向速度有2个主频，分别是存在于整个空间的全空间主频和出现在锥体下端排尘口附近区域的局部主频。无灰斗结构的旋风分离器仅有1个全空间主频。全空间主频是气体旋流中心围绕旋风分离器几何中心摆动造成的，而局部主频是灰斗气体回流造成的。灰斗气体回流主频与全空间旋转流摆动的主频叠加形成了锥体下端排尘口附近区域瞬时切向速度的2个主频。

Abstract

The dust exhaust port at the bottom end of the cyclone separator adopts an ash or ashless bucket structure according to the requirements of the gas-solid separation process. The existence of the hopper has an important influence on the flow field inside the cyclone separator

and then the separating performance. But the research of this aspect is few. Therefore

the tangential velocity of gas flow field in the cyclone separator with and without hopper was measured by using hot wire anemometry (HWA). The results show that the swirling flow in the cyclone is highly instability

and the real tangential velocity fluctuates with low frequency and high amplitude. Further

the existence of hopper leads to strong instability of swirling flow field near the dust outlet

which is characterized by intense fluctuation of real tangential velocity. Fast Fourier transform analysis of measured data shows that the real tangential velocity of cyclone separator with hopper has two dominant frequencies

one exists in the whole space and another one presents in the local area near the dust outlet. However there is only one dominant frequency in the whole space of the cyclone without hopper. The dominant frequency of the whole space is caused by the swing of the swirling flow center around the geometric center

while the local dominant frequency is caused by the backflow from the hopper. So

the swing of the swirling flow from the hopper is superimposed on the swing of the swirling flow in the separation space

which forms two dominant frequencies near the dust outlet region.

关键词

Keywords

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