Effects of static bed height on pressure fluctuations and phase hold-ups in fluidized bed flotation column

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2025-02-07 DOI:10.1016/j.partic.2025.01.009

Jincheng Liu , Mengdi Xu , Yaowen Xing , Xiahui Gui

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引用次数: 0

Abstract

Characterizing the hydrodynamics of a fluidized bed flotation column is essential for understanding the behavior of this multiphase flow system. Bed pressure fluctuations and phase hold-ups are two of these key characteristics. Static bed height effects on these two key characteristics were comprehensively studied using experimental and statistical analysis operating for different flow regimes. And three different bed height-to-diameter ratios (H/D = 1.0, 1.5, and 2.0) were investigated. The time series signals of pressure fluctuation were recorded via a pressure transducer, then analyzed through time and frequency domain methods. Cross-sectional and radial combined gas and solid hold-ups distribution were detected through the electrical resistance tomography under different H/D ratios. Results indicated that the key parameters of bed pressure fluctuation signals and gas-solid hold-up distributions are significantly affected by the change in static bed height, which can be explained by differences in bubble dynamics and particle movement behaviors.

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静床高对流化床浮选柱压力波动和相含率的影响

描述流化床浮选柱的流体动力学特性对于理解多相流系统的行为至关重要。床层压力波动和相滞留是其中的两个关键特征。采用不同流型的实验和统计分析方法，全面研究了静床高度对这两个关键特性的影响。研究了三种不同的床层高径比（H/D = 1.0、1.5和2.0）。通过压力传感器记录压力波动的时间序列信号，然后通过时频域方法进行分析。通过电阻层析检测不同H/D比下的横截面和径向组合气固含率分布。结果表明：床层静态高度的变化对床层压力波动信号和气固含率分布的关键参数有显著影响，这可以用气泡动力学和颗粒运动行为的差异来解释。

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.