Impact of Particle Sizes on Flow Characteristics of Slurry Pump for Deep‐Sea Mining

Wang, Runkun; Guan, Yingjie; Xing, Jin; Tang, Zhenji; Zhu, Zuchao; Su, Xianghui

doi:10.1155/2021/6684944

Cited by 23 publications

(17 citation statements)

References 7 publications

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“…(4) More than 10% collision count in the acquired kinetic energy in the nonleak situation dissipates mainly in the bowl diffuser. (5) No matter in the leak case or not, the average kinetic energy of particles was more than twice through the first stage but only 1.1 times through the second stage. e selection of stages in the slurry pump design should consider the limitation of particle velocity improvement.…”

Section: Discussionmentioning

confidence: 99%

“…e cell size of the particle-passing components was adopted no more than the particle diameter (10 mm) to avoid nonphysical and nonsmooth results in the CFD-DEM simulation [5]. Figure 4 shows the computational grids of the slurry transport pump.…”

Section: Grid and Computing Settingsmentioning

confidence: 99%

“…Zhang et al [12] discussed a similar phenomenon by simulating particle trajectory under different particle sizes, volume fractions, and concentrations. Wang et al [5] studied the movement characteristics and spatial distribution of particles with diameters of 15, 10, and 5 mm at particle volume concentration of 5%. ey found that the stratification phenomenon gradually disappears with the increase of the intensity and scale of the vortex in the bowl diffuser.…”

Section: Introductionmentioning

confidence: 99%

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Coarse Particle Motion Characteristics in a Double‐Stage Slurry Pump Considering Leakage Flow

Jia

Wang

Zhu

et al. 2021

Shock and Vibration

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Along with the pressing demand for the long-distance transportation of coarse particles in the deep-sea mining industry, evaluating the slurry pump’s passing through and erosive wear by studying the particle motion characteristics and the slurry behavior is becoming increasingly important. Research on the influence of leakage flow through the clearance and balancing devices on the motion characteristic of granular grain flow is of great significance but has been seldom studied. This study coupled the discrete element method with the CFD method to investigate the comprehensive effect of a double-stage slurry pump’s main flow and leakage flow on the motion characteristics of particles with a 10 mm diameter. Results show that the leakage flow occupation in main flow falls from 26%–27% to 8%–9% for the two stages, with the flow rate increasing from 80 m3/h to 200 m3/h. In the first stage with leakage, accumulation of coarse particles was observed at the impeller eye, which should be paid much attention to slurry pumps’ operation to eliminate the chance of blockage. In the nonleak situation, although the increment of the average kinetic energy of particles through the impeller is more significant than in the leak case, most of them dissipate primarily by more than 10% collision in the bowl diffuser. In the leak or nonleak case, the average kinetic energy of particles was more than twice through the first stage but only 1.1 times through the second stage. The selection of stages in the slurry pump design should consider the limitation of particle velocity improvement.

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Section: Discussionmentioning

confidence: 99%

Section: Grid and Computing Settingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coarse Particle Motion Characteristics in a Double‐Stage Slurry Pump Considering Leakage Flow

Jia

Wang

Zhu

et al. 2021

Shock and Vibration

Self Cite

View full text Add to dashboard Cite

show abstract

“…Solid particles that are being conveyed will inflict wear on the flow passage components in pumps [16]. Wang et al [17] studied the wear associated with sludge concentration and particle size on a double-suction centrifugal pump.…”

Section: Introductionmentioning

confidence: 99%

Study on the Non-Steady-State Wear Characteristics and Test of the Flow Passage Components of Deep-Sea Mining Pumps

Hong

2022

Applied Sciences

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In the process of conveying coarse-grained minerals, the internal flow-through passage components of mining pumps are subject to wear. The flow of coarse particles in such pumps is complex and changes constantly, making it necessary to study the non-steady-state wear characteristics and test the flow passage components. The evolution of the surface wear rate for the flow passage components during one third of a rotation cycle (120°) of a mining pump impeller with small, design, and large flow rates was analyzed in this study based on a discrete phase model (DPM). The flow that occurs during an entire rotation cycle of the impeller was investigated. The wear test was carried out with a small test pump with the same specific speed as and a similar structure to that of the deep-sea mining pump. The test results were compared with the numerical calculation results of the deep-sea mining pump obtained by using the same numerical calculation method and wear model, and the test wear area was found to be more consistent with the numerical calculation wear area. The results show that the numerical calculation method used in this article can more accurately predict the surface wear of the passage components of the mining pump and provides a suitable method for the prediction of the wear characteristics of the mining pump.

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“…In recent years, there has been much research on the motion of the solid-liquid two-phase flow. Wang et al [1] used a CFD-DEM coupling algorithm to study the spatial distribution and motion characteristics of particles with different sizes, and the effects of particle diameter on the intensity and scale of the vortex in a guide vane were investigated; it was concluded that the existence of particles had a limited effect on the hydraulic performance of the pump in low-concentration fluids. In a numerical study of the internal flow field of the solid-liquid slurry pump, Shi et al [2] analyzed the wear mechanism of the volute wall of a slurry pump and proposed an effective wear equation for estimating the wear strength and wear area of the slurry pump volute.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study of Hydraulic Performance and Wear Characteristics of a Slurry Pump

et al. 2021

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The slurry pump is widely used in ore mining, metal smelting, petrochemical, and other industries, mainly to transport fluid media containing large solid particles. Importantly, it is easy to damage the impeller of a slurry pump in the operation process, which greatly affects the performance of the pump. In this paper, a 25 MZ slurry pump was selected as the research object, and the Euler–Euler multiphase flow model was employed to analyze the internal flow characteristics of the slurry pump under the conditions of clear water and solid–liquid two-phase flow. Additionally, the flow characteristics of each part under different flow conditions were studied, and the effects of different particle volume concentrations, particle sizes, and pump speeds on the impeller’s wear characteristics and hydraulic performance were analyzed. In order to verify the reliability and accuracy of the numerical simulation results, clean water and solid–liquid two-phase flow wear tests of the slurry pump were carried out, and the results showed that a high solid volume fraction and solid–phase slip velocity were generated at the junction of the blade leading edge and the rear cover plate, thus leading to easier wear of the blade. Therefore, enhancing the strength of the junction between the blade leading edge and the rear cover plate is beneficial for improving service life and should be considered in the design of slurry pumps.

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Impact of Particle Sizes on Flow Characteristics of Slurry Pump for Deep‐Sea Mining

Cited by 23 publications

References 7 publications

Coarse Particle Motion Characteristics in a Double‐Stage Slurry Pump Considering Leakage Flow

Coarse Particle Motion Characteristics in a Double‐Stage Slurry Pump Considering Leakage Flow

Study on the Non-Steady-State Wear Characteristics and Test of the Flow Passage Components of Deep-Sea Mining Pumps

Numerical and Experimental Study of Hydraulic Performance and Wear Characteristics of a Slurry Pump

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