CFD simulation on internal flow field of typical hydrocyclone for coal and development of novel hydrocyclone

IF 2.3 4区 工程技术 Q3 ENGINEERING, CHEMICAL
Xuebin Zhang, Youjun Tao
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引用次数: 0

Abstract

AbstractThe work conducted flow field analysis of a typical hydrocyclone (φ500 type) in the Coal Processing Plant using CFD simulation, including hydrocyclone modeling, flow field development, static pressure distribution, three-dimensional velocity, and air column development. Besides, the effects of influential factors on the classification effect of hydrocyclone were studied. On this basis, a novel hydrocyclone model was developed and simulated for the ultrafine classification of coal slurry. The static pressure and velocity in the typical hydrocyclone have good symmetry and certain regularity. Decreasing the overflow pipe diameter and cone angle, while increasing the underflow pipe diameter, cylindrical section height, and feed rate will increase the classification efficiency of hydrocyclone. The novel hydrocyclone designed of annular feeding, small cone angle, and large cone bottom reduces energy consumption, decreases classification size, and improves classification accuracy. CFD simulation results show that the novel hydrocyclone has higher classification efficiency and smaller classification size over the typical hydrocyclone. The novel hydrocyclone develops an excellent ultrafine classification effect of coal slurry and provides a prospective approach for the industrial application of hydrocyclone in the fine coal ultrafine classification process.Keywords: Hydrocycloneultrafine classificationcoal slurryclassification efficiencyflow field simulation Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the National Natural Science Foundation of China under Grant No. [51874303].
典型煤用水力旋流器内部流场CFD模拟及新型水力旋流器研制
摘要采用CFD模拟方法对某煤厂φ500型典型水力旋流器进行了流场分析,包括旋流器建模、流场展开、静压分布、三维速度、气柱展开等。此外,还研究了各影响因素对旋流器分级效果的影响。在此基础上,建立了一种新型的水力旋流器模型,并进行了数值模拟。典型水力旋流器的静压和速度具有良好的对称性和一定的规律性。减小溢流管径和锥角,增大下流管径、圆柱段高度和进给量,可以提高水力旋流器的分级效率。采用环形进给、锥角小、锥底大的新型旋流器设计,降低了能耗,减小了分级尺寸,提高了分级精度。CFD模拟结果表明,与传统旋流器相比,新型旋流器具有更高的分级效率和更小的分级尺寸。新型水力旋流器对煤浆具有优异的超细分级效果,为水力旋流器在细煤超细分级过程中的工业应用提供了前景。关键词:水力旋流器;超细分级;煤浆;分级效率;本研究受国家自然科学基金资助,项目资助号:[51874303]。
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来源期刊
Particulate Science and Technology
Particulate Science and Technology 工程技术-工程:化工
CiteScore
4.40
自引率
4.00%
发文量
86
审稿时长
12 months
期刊介绍: Particulate Science and Technology, an interdisciplinary journal, publishes papers on both fundamental and applied science and technology related to particles and particle systems in size scales from nanometers to millimeters. The journal''s primary focus is to report emerging technologies and advances in different fields of engineering, energy, biomaterials, and pharmaceutical science involving particles, and to bring institutional researchers closer to professionals in industries. Particulate Science and Technology invites articles reporting original contributions and review papers, in particular critical reviews, that are relevant and timely to the emerging and growing fields of particle and powder technology.
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