Experimental investigation on particle transport of coal fines in unsteady terrain slug flow

Zhong, Zhang; Wu, Xiaodong; Han, Guoqing; Li, Chen; He, Lin; Xiong, Xiaofei; Wang, Shuolong

doi:10.1016/j.petrol.2018.03.079

Cited by 13 publications

(8 citation statements)

References 16 publications

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“…Inspired by our daily observations of pipeline cleaning, we discovered that abrupt changes in flow velocity or the introduction of slug flow can clean the PDP. Additionally, we gained insights from relevant studies in fluid mechanics on the impact mechanism of slug flow on pipeline cleaning [ 35 ]. Moreover, also inspired by the SFA [ 29 , 30 ], the utilization of segmented flow can reduce the total online circulation time, thereby enhancing its effectiveness in preventing PDP and PDW.…”

Section: Methodsmentioning

confidence: 99%

Automated Monitoring System for Suspended Photocatalytic Batch Reactions Based on Online Circulatory Spectrophotometry

Lei,

Huang

2024

Nanomaterials

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Employing an automated monitoring system (AMS) for data acquisition offers benefits, such as reducing the workload, in the kinetic study of suspended photocatalytic batch reactions. However, the current methods in this field tend to narrowly focus on the substrate and often overlook the optical characteristics of both the mixture and solid particles. To address this limitation, in this study, we propose a novel AMS based on online circulatory spectrophotometry (OCS) and incorporate debubbling, aeration, and segmented flow (DAS), named DAS-OCS-AMS. Initially, a debubbler is introduced to mitigate the issue of signal noise caused by bubbles (SNB). Subsequently, an aerated and segmented device is developed to address the issue of particle deposition on the inner wall of the pipeline (PDP) and on the windows of the flow cell (PDW). The proposed DAS-OCS-AMS is applied to monitor the kinetics of the photocatalytic degradation of Acid Orange Ⅱ by TiO2 (P25), and its results are compared with those obtained using the traditional OCS-AMS. The comparative analysis indicates that the proposed DAS-OCS-AMS effectively mitigates the influence of SNB, PDP, and PDW, yielding precise results both for the mixture and solid particles. The DAS-OCS-AMS provides a highly flexible universal framework for online circulatory automated monitoring and a robust hardware foundation for subsequent data processing research.

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Section: Methodsmentioning

confidence: 99%

Automated Monitoring System for Suspended Photocatalytic Batch Reactions Based on Online Circulatory Spectrophotometry

Lei,

Huang

2024

Nanomaterials

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“…Based on the results in the literature [51][52][53] and the practice in the field, 54 the water injection velocity, viscosity of the injection fluid, stacking angle of the coal particle, and angle of the borehole would significantly impact the two-phase flow characteristics. The following scenarios were designed to test the parameter sensitivities, as listed in Table 4.…”

Section: Parameter Sensitivit Y Analysismentioning

confidence: 99%

A liquid‐solid model to optimize the application of friction reducers for hydraulic fracturing/cutting in the underground coal mine

Xiong

Shen

et al. 2021

Energy Science & Engineering

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“…Then the pressure of the curved pipe is measured by RoseMount pressure sensors in the range of 0-500 kPa, which are installed at the inlet, middle, and outlet of the curve pipe. As shown in Figure 2, the liquid holdup is measured by a conductivity proposed by Fossa (1998) and updated by Zhong et al (2018), which is installed at the outlet of the curve pipe. This method is relatively simple and can record the real-time liquid holdup without breaking the flow pattern.…”

Section: The Experiments Arrangementmentioning

confidence: 99%

An experimental study of liquid unloading in the curve section of horizontal gas wells

Shi

Han

et al. 2021

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Liquid unloading is a very common and important issue in horizontal gas wells, and the presence of curve sections increases the complexity of the phenomenon and its study. Liquid loading in a gas well will sharply reduce production, therefore, the liquid-unloading onset of different curved pipes is essential to gas production. In this work, liquid-unloading onset experiments were conducted in curved pipes with different curvatures. Then, the critical gas velocity VsgCR can be determined according to the measured pressure gradients, liquid holdup, and liquid film reversal. This work analyzes the factors which will lead to the liquid unloading and explores the trend of the pipe curvature’s influence on the liquid unloading under laboratory conditions. The experimental results show that the critical gas velocity rises with the increase of pipe curvature, the increase is mainly due to the centrifugal force. The present work also compares the predicted results of the OLGA model and Beggs–Brill model with experimental data. The comparison results indicate that both models fit relatively well to the experimental data at the low superficial gas velocity, and both models have poor performance at high superficial gas velocity. The OLGA model fits the experimental data better than the Beggs–Brill model at high superficial gas velocity. The error analysis shows that most of the predicted data is not in good agreement with experimental data. Some errors between experimental data and calculation results are out of the range of 50%.

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Experimental investigation on particle transport of coal fines in unsteady terrain slug flow

Cited by 13 publications

References 16 publications

Automated Monitoring System for Suspended Photocatalytic Batch Reactions Based on Online Circulatory Spectrophotometry

Automated Monitoring System for Suspended Photocatalytic Batch Reactions Based on Online Circulatory Spectrophotometry

A liquid‐solid model to optimize the application of friction reducers for hydraulic fracturing/cutting in the underground coal mine

An experimental study of liquid unloading in the curve section of horizontal gas wells

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