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过程工程学报 ›› 2020, Vol. 20 ›› Issue (9): 1008-1015.DOI: 10.12034/j.issn.1009-606X.219358

• 流动与传递 • 上一篇    下一篇

旋流分离-颗粒床耦合气固分离装备旋流场静压分布

刘堉学,高思鸿,范怡平*,卢春喜   

  1. 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:2019-12-04 修回日期:2019-12-26 出版日期:2020-09-22 发布日期:2020-09-23
  • 通讯作者: 范怡平 fanyipin@yahoo.com
  • 基金资助:
    国家自然科学基金石油化工联合基金A类重点项目

Static pressure distribution in a novel gas-solid separator with coupling centrifugal separation and granular bed filtration

Yuxue LIU, Sihong GAO, Yiping FAN*, Chunxi LU   

  1. State Key Laboratory of Heavy oil, China University of Petroleum, Beijing 102249, China
  • Received:2019-12-04 Revised:2019-12-26 Online:2020-09-22 Published:2020-09-23

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摘要： 针对一种集旋风分离器和内置颗粒床优势于一体的新型耦合气固分离装备在无灰负荷及固定床操作条件入口环形空间、分离空间和灰斗内静压场进行研究。结果表明，静压沿周向为非对称分布，轴向为非均匀分布，径向则呈中心低两侧高分布；且存在着静压分布的降压区(0?~180?，以入口处为0?)和增压区(180?~360?)；装备中心的负压及旋流作用在轴向高度H=6.41D(D为旋风壳体内径)以下对静压的影响不再显著；内置颗粒床外壁附近存在“滞留层”，有利于提高装备的分离性能。根据实验数据给出了静压周向分布和静压轴向分布的经验公式。

关键词: 气固分离, 旋风分离器, 颗粒床, 耦合, 静压, 模型

Abstract: A gas?solid separator which coupled a cyclone with a granular bed filter was put forward. It combined the mechanisms of the centrifugal separation and the filtration. The experiment was carried out under the conditions of both no-dust inlet and the fixed bed mode. The static pressure in the inlet annular space, the separation space and the dust hopper of the coupled equipment were measured. The experimental results showed that the distribution of the static pressure reflected the features of the flow field inside the equipment. Specifically, the tangential and axial distributions of static pressure assumed asymmetric profiles while they increased from the center towards the wall. A static pressure increasing region and a decreasing region in the separation space were observed, respectively. The influences of the negative pressure in the central area and the vortex on the static pressure were not clearly seen below H=6.41D. Moreover, it was also found that a low-velocity area appeared near the outer wall of the granular bed, which believed to be beneficial to the separation efficiency of the proposed separator. Based on the experimental data, a static pressure distribution model covering the physical parameters, the structural parameters and the operating parameters were given.

Key words: gas-solid separation, cyclone, granular bed, couple, static pressure, model