1
|
Hao Y, Song X, Wang C, Fan B, Yang K. Dynamic characterization of water hammer in gangue fly ash slurry pipelines during valve closure. Sci Rep 2024; 14:11470. [PMID: 38769119 DOI: 10.1038/s41598-024-62504-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 05/17/2024] [Indexed: 05/22/2024] Open
Abstract
In the process of coal-filling mining, the gangue fly-ash slurry (GFS) needs to be transported over a long distance to reach the gobs. The abrupt closure of the valve during the transportation of GFS can result in a water hammer that significantly endangers the stability and safety of the pipeline transport system. To study the fluctuations in pressure induced by abrupt closure of the valve, experiments on the rheological parameters of gangue-coal ash slurry were conducted. Transient numerical simulations were carried out using the computational fluid dynamics method for various valve closing times. The results indicate that, with the increase of slurry concentration, the yield stress of the slurry significantly increases. When the concentration exceeds 76%, the increase in yield stress reaches 38.4% and 35.1%, respectively. Upon valve closure, the internal pressure of the slurry in the pipeline exhibits periodic dynamic oscillations. As the duration of valve closure increases, the frequency of periodic water hammer events decreases. The maximum water hammer pressure caused by valve closure decreases with the increasing distance between the valve and the closure point. At the same time, the intensity of maximum water hammer pressure fluctuations increases with the increase in slurry concentration and flow velocity in the pipeline. The results can provide references for water hammer protection and pipeline selection during the transportation of backfill slurry in mining.
Collapse
Affiliation(s)
- Yuxin Hao
- School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China.
| | - Xuepeng Song
- School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China
| | - Chengshuai Wang
- School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China
- Shanxi Province Energy Vocational School (Shanxi Province Energy Staff Education Center), Taiyuan, 030012, China
| | - Bowen Fan
- School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China
| | - Kai Yang
- BGRIMM Technology Group, Beijing, 102628, China
| |
Collapse
|
2
|
Wang N, Lu H, Liu B, Xiong T, Li J, Wang H, Yang Q. Enhancement of heavy metals desorption from the soil by eddy deep leaching in hydrocyclone. J Environ Sci (China) 2024; 135:242-251. [PMID: 37778799 DOI: 10.1016/j.jes.2022.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 12/03/2022] [Accepted: 12/04/2022] [Indexed: 10/03/2023]
Abstract
An eddy deep leaching technology was developed in this paper to address the challenge of treating heavy metal contaminants in industrial mining areas. The desorption effect of As, Cd, Sb and Pb was investigated utilizing chemical leaching and physical eddy techniques. It was found that the heavy metals concentration increased with decreasing particle size. The highest proportion of Cd in the form distribution of soil was in the bound to iron and manganese oxides, while the maximum proportion of As, Sb and Pb were in the residual. The optimal solid-liquid ratio of the hydrocyclone was 1:20, and the corresponding separation efficiency and flow rate were 84.7% and 1.76 m3/hr, respectively. The grade efficiency of soil particle separation increases with particle size and exceeds 99% for particles above 1,000 µm. Leaching experiments have revealed that oxalic acid (OA) and a combination of oxalic acid and EDTA (OAPE) were more efficient than citric acid (CA) and a combination of citric acid and EDTA (CAPE) for the desorption of heavy metals, respectively. The comparison of OAPE and eddy leaching found that the latter improved the desorption efficiency by 9.4%, 7.5%, 7.2% and 7.8% for As, Cd, Sb and Pb compared to the former, respectively. The results demonstrated that the eddy leaching technique could further enhance the desorption efficiency of heavy metals. It is expected to provide technical support for soil remediation with reduced usage of leaching agents.
Collapse
Affiliation(s)
- Ning Wang
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hao Lu
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Bo Liu
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Tai Xiong
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jianping Li
- National Engineering Laboratory for High Concentration Refractory Organic Wastewater Treatment Technology, East China University of Science and Technology, Shanghai 200237, China.
| | - Hualin Wang
- National Engineering Laboratory for High Concentration Refractory Organic Wastewater Treatment Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Qiang Yang
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
| |
Collapse
|
3
|
Qiu S, Zhong L, Wang G, Fang X, Yang Y, Liu Q. Effect of Structural Parameters on the Performance of Axial-Flow Inlet Hydrocyclones for In Situ Desanding from Natural Gas Hydrate Mixed Slurry. ACS OMEGA 2023; 8:28531-28542. [PMID: 37576684 PMCID: PMC10413446 DOI: 10.1021/acsomega.3c02920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 07/11/2023] [Indexed: 08/15/2023]
Abstract
Structural parameters play a decisive role in the performance of hydrocyclones for in situ natural gas hydrate (NGH) recovery and desanding. In this paper, the effects of key structural parameters on its performance were investigated by numerical simulations and experimental methods. The results show that the most influential factors are the spiral pitch of the spiral inlet, the vortex finder diameter, and the spigot diameter. The second most influential factors are the spiral turn number and the cone angle. Other parameters have the least influence. Specifically, the NGH recovery efficiency and pressure drop increase, but desanding efficiency decreases as d0/D and the cone angle increase. The NGH recovery efficiency and pressure drop decrease and desanding efficiency increases as ds/D increases. Therefore, it is necessary to choose a suitable value to balance the efficiency and pressure drop to improve the performance, for example, selecting the appropriate diameter ratio of the vortex finder and spigot. The above results can be used for the engineering design of in situ separators in marine hydrate mining and further realize in situ desanding, NGH recovery, and sand backfilling.
Collapse
Affiliation(s)
- Shunzuo Qiu
- Department
of International Applied Technology, Yibin
University, Yibin 644000, China
| | - Lin Zhong
- Department
of Mechatronic Engineering, Southwest Petroleum
University, Chengdu 610500, China
| | - Guorong Wang
- Department
of Mechatronic Engineering, Southwest Petroleum
University, Chengdu 610500, China
| | - Xing Fang
- Department
of Mechatronic Engineering, Southwest Petroleum
University, Chengdu 610500, China
| | - Yan Yang
- Department
of International Applied Technology, Yibin
University, Yibin 644000, China
| | - Qin Liu
- Department
of International Applied Technology, Yibin
University, Yibin 644000, China
| |
Collapse
|
4
|
Modeling industrial hydrocyclone operational variables by SHAP-CatBoost - A “conscious lab” approach. POWDER TECHNOL 2023. [DOI: 10.1016/j.powtec.2023.118416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
|
5
|
Effect of cone section combination form on the separation performance of a biconical hydrocyclone. POWDER TECHNOL 2023. [DOI: 10.1016/j.powtec.2023.118325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
|
6
|
Effects of particle wettability and water moisture on separation efficiency and drop size distribution of particle-laden droplets in oil. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
7
|
Qiu S, Wang G, Zhong L, Fang X. Analysis of the adaptability of marine hydrate in-situ separator for sand removal to production volume. SEP SCI TECHNOL 2022. [DOI: 10.1080/01496395.2022.2160350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Shunzuo Qiu
- Department of International Applied Technology, Yibin University, Yibin, Sichuan, China
| | - Guorong Wang
- School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan, China
| | - Lin Zhong
- School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan, China
| | - Xing Fang
- School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan, China
| |
Collapse
|
8
|
Dianyu E, Fan H, Su Z, Xu G, Zou R, Yu A, Kuang S. Numerical study of the multiphase flows and separation performance of hydrocyclone with tapered cross-section inlet. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.118208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
9
|
Yu B, Peng Y, Luo X, Zhu X, Xue J, Gong H, Liu Y. Numerical investigation of erosion characteristics of coupling separators with different conical profiles. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.10.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
10
|
Effects of Closing Times and Laws on Water Hammer in a Ball Valve Pipeline. WATER 2022. [DOI: 10.3390/w14091497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Water hammers seriously endanger the stability and safety of pipeline transportation systems, and its protection mechanism has been a hotspot for research. In order to study the change of water hammer pressure caused by the ball valve under different closing laws, the computational fluid dynamics method was used to perform transient numerical simulation of the ball valve under different closing times and closing laws. The results show that the faster the valve closing speed in the early stage, the greater the water hammer pressure. The vortex core motion and pressure vibration were affected by the closing law. Extending the valve closing time can effectively reduce the maximum water hammer pressure. These findings could provide reference for water hammer protection during the closing process of the pipeline system with the ball valve.
Collapse
|