Experimental and numerical investigation on erosion of circular and elliptical immersed tubes in fluidized bed

Xu, Liuyun; Wu, Feng; Ren, Haibo; Zhou, Wenjing; Yan, Yuan

doi:10.1016/j.powtec.2022.117820

Cited by 5 publications

(2 citation statements)

References 57 publications

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“…The solution to the translational motion equation of particles is based on Newton's second law [27], and the motion equation is:…”

Section: Particle Motion Equationsmentioning

confidence: 99%

Research on the Grinding Process of Superhard Particles in the Fluidized Bed Opposed Jet Mill Based on the CFD-DEM Methodology

Shen,

Jiang,

Liu

et al. 2024

Minerals

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The process of superhard particle breakage in the grinding zone of the fluidized bed opposed jet mill is investigated using the CFD-DEM (computational fluid dynamics-discrete element method) coupling method with the Tavares UFRJ Breakage Model in the present study. The effects of structural and operational parameters, such as target plate structure, nozzle position, air inlet velocity, and feed rate, on the equipment stress distribution, airflow velocity, pressure field, particle velocity, and cumulative particle size distribution are thoroughly studied to determine the optimal structural and operational parameters. Experimental validation is conducted, including scanning electron microscope (SEM) observation of particle morphology and analysis of particle size distribution of ground product particles. The simulation results indicate that the wear rate of the structure without a target plate is lower than that of the structure with a target plate in the grinding central zone. Therefore, the structure without a target plate is chosen for further investigation. The cumulative particle size distribution after grinding is influenced by nozzle position, air inlet velocity, and feed rate. The particle D50 is positively correlated with nozzle spacing and feed rate, while it is negatively correlated with air inlet velocity. The optimal grinding effect is achieved when the distance between the nozzle and the center of the grinding zone ranges from 52.5 mm to 72.55 mm, the air inlet velocity is 950 m/s, and the feed rate is 10.5 g/s. Through experimental investigation, it has been observed that when the feed rate is 10 g/s, the particle size distribution becomes more uniform. Furthermore, consistent trends in the cumulative particle size distribution in the experiment and simulation results can be found, which validates the present numerical model. It was observed that particles at low feed rates retain certain angular edges, while particle roundness increases at high feed rates.

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“…The solution to the translational motion equation of particles is based on Newton's second law [27], and the motion equation is:…”

Section: Particle Motion Equationsmentioning

confidence: 99%

Research on the Grinding Process of Superhard Particles in the Fluidized Bed Opposed Jet Mill Based on the CFD-DEM Methodology

Shen,

Jiang,

Liu

et al. 2024

Minerals

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“…There are many optimization designs at the elbow [6,[18][19][20] and straight sections of the pipe [21][22][23][24], including the addition of a vortex chamber in the elbow section [18], the blocking tee replacement [19], the bionic erosion resistance wall [20], and the spiral structure in the straight section of the pipe [21]. The orientation of the flow pipe [25,26] and the design of the new erosion experimental device [27][28][29] are also studied. Additionally, the detection of pipe elbow erosion levels has been combined with the percussion method and deep learning [30].…”

Section: Introductionmentioning

confidence: 99%

Erosion Analysis and Optimal Design of Sand Resistant Pipe Fittings

Song,

Mi,

Lei

et al. 2024

Machines

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Erosion of solid particles in a pipe elbow containing a 90° angle is investigated by simulation methods. In the process of shale gas exploitation, the impact of solid particles carried by fluid on the inner surface wall of pipes, as well as the turbulent flow, cause the erosion of pipes, which brings about heavy economic losses for the oil and gas industry. In the impact erosion of the inner surface wall of the pipe, the worst erosion occurs at the elbow. In this study, the erosion of a pipe elbow which has been widely used in actual production is analyzed, and the influence of the fluid velocity, the solid particle size, and the wall roughness on the erosion is investigated. Additionally, the simulation results of the erosion with the rebound and freeze boundary conditions are compared, indicating that setting the freeze boundary condition could significantly improve the computational efficiency by 74% with the acceptable accuracy. In order to reduce the impact erosion in the pipe elbow containing a 90° angle, an optimal design is proposed that can reduce the maximum erosion rate by 52.4%. These results complement the research of elbow erosion and provide ideas for the optimization problem of a pipe elbow containing a 90° angle.

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DDPM simulation of the erosion of immersed tubes in a pulsating fluidized bed

Wang

2023

Chemical Engineering Science

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Experimental and numerical investigation on erosion of circular and elliptical immersed tubes in fluidized bed

Cited by 5 publications

References 57 publications

Research on the Grinding Process of Superhard Particles in the Fluidized Bed Opposed Jet Mill Based on the CFD-DEM Methodology

Research on the Grinding Process of Superhard Particles in the Fluidized Bed Opposed Jet Mill Based on the CFD-DEM Methodology

Erosion Analysis and Optimal Design of Sand Resistant Pipe Fittings

DDPM simulation of the erosion of immersed tubes in a pulsating fluidized bed

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