Improved swirl-vane designs: Development of low-pressure-drop tubular dynamic hydrocyclones for pre-dehydration

IF 2.3 4区工程技术 Q3 CHEMISTRY, MULTIDISCIPLINARY

Separation Science and Technology Pub Date : 2023-05-19 DOI:10.1080/01496395.2023.2212859

Yi-peng Ji, Jiaqing Chen, Xiu-rong Wang, Jian Zhang, G. Ding, Zheng Si, Yi Shi, Hong Du

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引用次数: 0

Abstract

ABSTRACT Effective pre-dehydration is achieved to stabilize and improve oil production in high water cut oil fields. In order to reduce the pressure loss during the pre-dewatering process, a low-pressure-loss dynamic hydrocyclone (LPDH) was developed. And its swirler vane was designed which can not only drive liquid into circumferential rotational flow but also produce axial pressure. The axial pressure will compensate for the separation process pressure loss. The key parameters that affected the axial pressure were studied, the relative motion between the fluid and the vane was analyzed, and a pre-dehydration LPDH was designed (processing capacity is 1.0 m3/h). The changes in the separation efficiency and axial pressure of the LPDH with the operational and physical parameters were studied by the computational fluid dynamics (CFD) numerical simulation method. The results revealed that the pressure is increased during rotation-starting, and the pressure loss of LPDH was lower than the dynamic and compound hydrocyclones. Notably, low shear stress was generated using the designed vane when the fluid started rotating, and the separation efficiency increased under these conditions. When the speed of rotation of the swirler is 167.5 rad/s, the separation efficiency of the LPDH is greater than 99.8%.

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改进的旋流叶片设计:用于预脱水的低压降管式动态水力旋流器的开发

为了稳定和提高高含水油田的产量，实现了有效的预脱水。为了减少预脱水过程中的压力损失，研制了低压损失动态水力旋流器。设计了既能驱动液体进入周向旋转流又能产生轴向压力的旋流叶片。轴向压力将补偿分离过程中的压力损失。研究了影响轴向压力的关键参数，分析了流体与叶片的相对运动，设计了预脱水LPDH(处理能力为1.0 m3/h)。采用计算流体力学(CFD)数值模拟方法，研究了LPDH分离效率和轴向压力随操作参数和物理参数的变化规律。结果表明:旋转启动时压力增大，LPDH的压力损失小于动态和复合水力旋流器;值得注意的是，当流体开始旋转时，使用所设计的叶片产生的剪切应力较小，分离效率提高。当旋流器转速为167.5 rad/s时，LPDH的分离效率大于99.8%。

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来源期刊

Separation Science and Technology 工程技术-工程：化工

CiteScore

6.10

自引率

3.60%

发文量

131

审稿时长

5.7 months

期刊介绍： This international journal deals with fundamental and applied aspects of separation processes related to a number of fields. A wide range of topics are covered in the journal including adsorption, membranes, extraction, distillation, absorption, centrifugation, crystallization, precipitation, reactive separations, hybrid processes, continuous separations, carbon capture, flocculation and magnetic separations. The journal focuses on state of the art preparative separations and theoretical contributions to the field of separation science. Applications include environmental, energy, water, and biotechnology. The journal does not publish analytical separation papers unless they contain new fundamental contributions to the field of separation science.