CFD study on the performance of reducing pressure drop holes in cyclone separator
CFD study on the performance of reducing pressure drop holes in cyclone separator
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DOI：
10.1016/j.matpr.2020.11.425
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
N. Prasanna;K. Subramanian;S. Ajay;T. Rajagopal;V. Vigneshwaran
中科院分区：
文献类型：
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作者：
N. Prasanna;K. Subramanian;S. Ajay;T. Rajagopal;V. Vigneshwaran
旋风分离器是一种简单而有效的去除气相中粉尘或悬浮颗粒的设备。尽管旋风分离器是一种有效的分离器，但它也存在着压力降、耐火材料壁面磨损等缺点。为了降低压力降，提高分离效率，人们对旋风分离器进行了大量的研究。然而，许多研究工作依赖于旋风分离器的设计改进。本文主要是对现有旋风分离器进行改造。在现有的旋风分离器涡流管的圆周上等间距地开有4孔、8孔、12孔和16孔4种不同的减压孔。在SOLIDWORKS 2016中，以流量为500 m3/hr为条件，对带和不带REPDH的旋风分离器进行建模，采用雷诺应力模型作为湍流模型，采用Ansys fluent 18.1对所有旋风分离器进行计算流体动力学（CFD）分析，入口速度从15 m/s变化到30 m/s。CFD分析结果表明，在旋风分离器的旋涡溢流管中采用REPDH可以降低压降，提高分离效率，适用于高通量模型，如Swift HT和Stairmand HT模型，也适用于Swift HE模型。4孔模型为这三种模型提供了最优结果。一般来说，REPDH设计修改很适合于涡流管直径与旋风分离器主直径之比不等于0.5的旋风分离器模型。
Cyclone separator is the one of the simple and effective equipment for removing the dust or suspended particle in gaseous phase. Even though cyclone separator is effective it has drawbacks such as pressure drop, wear of refractory wall etc. Ample research was carried out in cyclone separator for reducing pressure drop and increase separation efficiency. However, many research works lean on design modification of cyclone separator. Whereas this article mainly concentrates on reshaping existing cyclone separator. Reducing pressure drop holes (REPDH) are drilled equidistantly on the circumference of existing cyclone separator vortex finder in four distinct ways termed as 4-holes, 8-holes, 12-holes and 16-holes respectively. Cyclone separator with and without REPDH are modelled in SOLIDWORKS 2016 for a stream rate of 500 m3/hr. Computational fluid dynamic (CFD) analysis are carried for all the cyclone separator with Ansys fluent 18.1 with variety of inlet velocity from 15 m/s to 30 m/s, employing Reynolds stress model as turbulent model. The outcome of CFD analysis illustrate that utilizing REPDH in vortex finder of cyclone separator reduces the pressure drop and increased separation efficiency, is well suited for high throughput models such as swift HT and Stairmand HT models also suited for Swift HE models. 4holes model provide the optimum results for these three models. In general, REPDH design modifications are well suited for cyclone separator models whose ratio of vortex finder diameter to main diameter of cyclone separator is not equal to 0.5.