Particle Transport Velocity in Vertical Transmission with an Airlift Pump

Enany, Parviz; Shevchenko, Oleksandr; Drebenstedt, Carsten

doi:10.3390/fluids7030095

Cited by 8 publications

(2 citation statements)

References 20 publications

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“…Compared with the traditional mining method, the air-lifting pump has the advantages of simple structure, low cost, high safety and reliability, and less environmental pollution, so it has become the focus of research. Enany (Enany et al, 2021) conducted an experimental study on the air-lifting pump under different air intake and submerged rates, and the results showed that the optimal value of the liquid phase efficiency of the air-lifting pump under the same intake air amount is between 0.6 and 0.75 for the submerged rate. Catrawedarma I.…”

Section: Introductionmentioning

confidence: 99%

Effect of construction technology on air-lifting pump mining

et al. 2023

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The air-lifting pump has the advantages of low cost, strong reliability, simple structure and convenient maintenance, especially in the fields of deep-sea mining, oilfield mining and mineral mining under complex geological conditions. The construction technology and air intake mode not only play a decisive role in the performance of the air-lifting pump, but also greatly hinder the engineering application of the air-lifting pump. Here, the air-lifting pump is taken as the research object, and the river sand is used as the experimental transport medium. The particle concentration-efficiency model is established based on the mechanical energy conservation theorem. The working performance characteristic parameters of the air-lifting pump under different construction technologies are obtained by a three-axis motion control system. On this basis, the working performance characteristic parameters of the air-lifting pump under different intake modes are obtained by changing the intake mode. The results show that the particle concentration-efficiency model can well describe the efficiency of lifting solid particles by the air-lifting pump. When the sand depth is less than 200 mm, the concentration and efficiency of solid particles transported by the air-lifting pump in the horizontal movement construction are significantly better than those in the fixed position construction. In the same construction technology, the solid particle concentration of the air-lifting pump in uniform intake mode is better than that in non-uniform intake mode, while the transportation efficiency of the air-lifting pump in non-uniform intake mode is better than that in uniform intake mode. The research results of this paper can provide an important theoretical reference value for the air-lifting pump in practical engineering applications.

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Section: Introductionmentioning

confidence: 99%

Effect of construction technology on air-lifting pump mining

et al. 2023

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“…Furthermore, existing correlations designed to predict the process parameters concentrate on the macroscopic aspects and lack insights into the trajectory of the liquid-solid flow within the riser [9][10]. Achieving a more thorough understanding of hydraulic transport to ensure dependable applications demands a more detailed approach.…”

Section: Introductionmentioning

confidence: 99%

Investigating Airlift Pump Performance under Three-Phase Flow Conditions

Taha,

Ahmed,

Moussa

2023

International Conference on Fluid Flow and Thermal Science

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Airlift pumps are widely utilized in many industries for the transport of three-phase flows. The solid particle behavior in the pump riser is dependent on the pump design parameters, such as the pump riser length and diameter, as well as the physical properties of the carrying liquid, and the characteristics of the solid particles. In this study, the momentum behavior of solid particles in the pump riser was experimentally investigated for an airlift pump handling solid particles consisting of 5mm glass spheres. This airlift pump had a 60degree halo-like slot injector and was tested at a constant submergence ratio of 0.7. High-speed images were used to identify the solid particle trajectories in the air-water-solid three-phase mixture in the pump risers. The results show that the transport of solid particles is strongly dependent on the liquid distribution in the three-phase mixture, which can be referred to as the liquid flow pattern. The solid particles are transported mainly by the liquid slugs; however, the particles in the lower portion of the liquid slug slow down due to gravitational forces. As well, the total mass lifted by the pump under two-phase flow conditions is found to be significantly lower when the pump is used to transport three-phase flows.

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Evaluation of airlift pump performance for vertical conveying of coal particles

Enany¹,

Shevchenko²,

Drebenshtedt³

2023

Int J Coal Sci Technol

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One of the crucial aspects of reducing air consumption when conveying particles with an airlift pump is to know the factors that affect the process of particle motion at an initial velocity of zero. To determine the influence of submergence ratio and physical properties of particles (such as size, shape, and mass) on the onset of vertical particle motion, the airlift pump was taken as the research object, and spherical glass together with irregular shaped coal were used as experimental test particles. The results show that unlike the water-solid environment, the start of particle motion in the water-air mixture does not always occur at a certain value of superficial water velocity and this value also increases with increasing submergence level. Among the parameters considered, the role of submergence ratio is much more effective than the dimensions and the shape of the particle, because by increasing submergence from 0.3 to 0.8, it is possible to reduce air consumption by up to 8 times. Based on this study the corresponding theoretical model derived by Fujimoto et al. is optimized, wherein the overall agreement between the modified theory and present experimental data is particularly good. Contrary to Fujimoto, the minimum superficial water velocity for lifting solids in the air-water mixture is not always smaller than water ambient which indicates on optimum submergence ratio higher than 0.7. Finally, a new criterion was introduced to describe the moment of onset of the particle motion as a function of the superficial fluid velocity ratio for each submergence value.

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Particle Transport Velocity in Vertical Transmission with an Airlift Pump

Cited by 8 publications

References 20 publications

Effect of construction technology on air-lifting pump mining

Effect of construction technology on air-lifting pump mining

Investigating Airlift Pump Performance under Three-Phase Flow Conditions

Evaluation of airlift pump performance for vertical conveying of coal particles

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