矿井胶带转载点气动螺旋雾幕控尘技术研究  

Numerical simulation and experimental study on dust suppression by supersonic spiral aerodynamic atomization

作　　者：荆德吉[1,2] 刘鸿威 张天 葛少成[3] 孟祥曦 任帅帅 张强 JING Deji;LIU Hongwei;ZHANG Tian;GE Shaocheng;MENG Xiangxi;REN Shuaishuai;ZHANG Qiang(College of Safety Science and Technology,Liaoning Technical University,Fuxin 123000,Liaoning,China;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education,Fuxin 123000,Liaoning,China;College of Safety and Emergency Management Engineering,Taiyuan University of Technical,Taiyuan 03000,China;Liaoning Tiefa Energy Co.,Ltd.,Tieling 112000,Liaoning,China)

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]矿山热动力灾害与防治教育部重点实验室,辽宁阜新123000 [3]太原理工大学安全与应急管理工程学院,太原030000 [4]辽宁铁法能源有限责任公司,辽宁铁岭112000

出　　处：《安全与环境学报》2023年第12期4343-4350,共8页Journal of Safety and Environment

基　　金：国家自然科学基金青年基金项目(51704146);国家自然科学基金项目(52204216);辽宁省自然科学基金项目(2020-MS-304);中国博士后科学基金项目(2022M711456)。

摘　　要：为治理煤矿胶带运输巷转载点输煤过程中粉尘污染问题,基于气动喷雾及螺旋雾幕控尘原理,提出气动螺旋雾幕控尘技术。以敏东一矿00工作面3号转载点为例,基于流体动力学(Computational Fluid Dynamics,CFD)离散粒子模型和有限元方法,利用COMSOL仿真模拟软件中的κ-ε湍流模型和粒子追踪模型,建立了井下胶带运输巷转载点风流-煤尘三维数值模型。研究了煤尘在受到巷道风流干扰时的运移轨迹及气动螺旋雾幕控尘技术装置气流流线分布,得到其空间分布规律。通过试验研究了技术装置最佳性能参数,结合现场试验对比分析,验证控尘技术高效除尘性能。结果表明,煤尘受到巷道风流及皮带牵引力的影响,大部分煤尘以0.3 m/s以下的速度向地面沉积,小部分煤尘吸附在皮带表面的速度约为1.3 m/s。气动螺旋喷雾装置的主路与侧路气压比为5?1时螺旋雾化效果最佳,除尘覆盖面积最大,具有较强的抗风性,降尘能力最佳;粉尘污染最为严重处总煤尘质量浓度降尘效率为87.53%,呼吸性煤尘质量浓度降尘效率为91.02%,证明气动螺旋雾幕控尘装置在喷头处液滴粒径极小,为治理煤矿井下胶带转载点粉尘污染提供了相关理论支持和治理手段。To control the dust pollution problem in the coal transporting process at the transfer point of the tape transport lane in coal mines.Based on the principle of pneumatic spray and spiral fog screen dust control,the pneumatic spiral fog screen dust control technology is proposed.Based on the discrete particle model and finite element method of Computational Fluid Dynamics(CFD),the κ-ε turbulence model and particle tracking model in COMSOL simulation software,a three-dimensional numerical model of wind flow-coal dust at the transfer point of underground tape transport lane was established,taking the No.3 transfer point of Mindong No.1 mine 00 working face as an example.The transport trajectory of coal dust when disturbed by the wind flow in the roadway and the airflow distribution of the pneumatic spiral fog screen dust control technology device was studied to obtain its spatial distribution law.The best performance parameters of the technical device were studied through experiments,combined with field tests and comparative analysis to verify the efficient dust removal performance of the dust control technology.The results show that the coal dust is affected by the wind flow of the tunnel and the traction of the belt,and most of the coal dust is deposited to the ground at a speed below 0.4 m/s,and a small part of the coal dust is adsorbed on the surface of the belt at a speed of about 1.2 m/s.The pneumatic spiral spray device has the best spiral atomization effect when the air pressure ratio between the main road and the side road is 5:1,with the largest dust removal coverage area,strong wind resistance,and the best dust reduction capacity;The dust reduction efficiency is 87.53% for total dust concentration and 91.02% for respiratory dust pollution concentration at the most serious place,which proves that the droplet size of pneumatic spiral fog screen dust control device is very small at the nozzle,which provides the relevant theoretical support and treatment means for the control of dust pollution at the underg

关 键 词：安全卫生工程技术 雾幕控尘 数值模拟 煤矿除尘 胶带运输巷 

分 类 号：X964[环境科学与工程—安全科学]