某铁矿井下空压机硐室降温数值模拟及应用研究

发布时间：2018-05-23 11:59

  本文选题：井下降温技术 + 空压机　； 参考：《江西理工大学》2015年硕士论文

【摘要】：随着国民经济的不断发展,矿产资源开采量不断增加,迫使大部分矿山转入深部或地质条件复杂的矿床开采。伴随着开采深度的不断增加,深井高温热害问题已成为制约采矿业发展的重要因素之一。特别是近年来随着科技的不断发展,越来越多大型设备安装在井下,井下机电设备硐室的高温热害尤为严重。高温工作环境不仅易造成设备故障,而且严重威胁着工人的身心健康,制约着矿山经济效益的提高。研究井下机电硐室热质交换机理,采取有效的降温技术措施具有非常重要的现实意义。本文基于热力学、流体力学和环境工程学等基础学科,在分析空压机硐室主要热源及空压机工作原理的基础上,对空压机硐室内风流热质交换过程进行了理论分析,得到了传热微分方程及硐室内风流温度预测方程,从理论上分析了空压机硐室内的对流换热过程。同时本文以某铁矿井下空压机硐室为研究对象,从质量守恒、动量守恒和能量守恒等基本原理出发,建立其数学模型,依据现场实际,建立其物理模型。应用FLUENT软件,对特定模型下的空压机硐室内对流换热过程进行了数值模拟,研究了不同入口风速、入口温度条件下空压机硐室内风流流场、温度场的基本变化规律。通过数值模拟与温度、风速的现场测试,提出了利用风障调节硐室流场、安装型号为K-4-.No12的风机增加风量及降低风流入口温度等综合技术措施对某铁矿井下空压机硐室进行了降温。研究结果表明：温度场受流场分布的影响,硐室形状突变及风流做绕流运动时易形成高温涡流区；入口温度在15～25℃时,其入口风速3-5 m/s为经济合理风速；当入口风速超过5m/s时,硐室温度并无明显下降趋势,而采用降低入口风流温度的方法效果明显；经实践证明,在三台功率为132KW的空压机同开的热源条件下,当入口温度19.4℃,入口风速3.2 m/s时,空压机硐室出口的温度降低到30.1℃,一年多来,硐室内空压机正常稳定运行。有效的保障了硐室内机械设备的正常运行,为矿井硐室降温提供理论指导和技术支持,对保证矿山安全生产有重要的现实意义。
[Abstract]:With the development of the national economy, the exploitation of mineral resources is increasing, which forces most mines to be mined in deep or complicated geological conditions. With the increasing of mining depth, the problem of high temperature thermal damage in deep wells has become one of the important factors restricting the development of mining industry. Especially in recent years, with the development of science and technology, more and more large equipments are installed underground, especially the high temperature thermal damage of underground electromechanical equipment chamber. The high temperature working environment is not only easy to cause equipment malfunction, but also threatens workers' physical and mental health seriously, and restricts the improvement of mine economic benefit. It is of great practical significance to study the heat and mass exchange mechanism of underground electromechanical chamber and to take effective cooling technical measures. Based on the basic subjects of thermodynamics, hydrodynamics and environmental engineering, based on the analysis of the main heat sources in the air compressor chamber and the working principle of the air compressor, this paper makes a theoretical analysis of the air flow heat and mass exchange process in the air compressor chamber. The heat transfer differential equation and the air flow temperature prediction equation are obtained, and the convection heat transfer process in the air compressor chamber is analyzed theoretically. At the same time, based on the basic principles of mass conservation, momentum conservation and energy conservation, this paper takes the underground air compressor chamber of a certain iron mine as the research object, sets up its mathematical model and establishes its physical model according to the field practice. By using FLUENT software, the convection heat transfer process in the chamber of air compressor is simulated, and the basic variation law of air flow field and temperature field in the air compressor chamber under different inlet wind speed and inlet temperature is studied. Through numerical simulation and field test of temperature and wind speed, it is proposed that the chamber flow field be regulated by wind barrier. Comprehensive technical measures such as increasing air volume and lowering inlet temperature of air flow with K-4-.No12 installation model have cooled the underground air compressor chamber of a certain iron mine. The results show that the temperature field is affected by the distribution of the flow field, the high temperature eddy zone is easily formed when the chamber shape changes and the air flow moves around the flow, the inlet wind speed of 3-5 m / s is economical and reasonable when the inlet temperature is 15 ~ 25 鈩，

本文编号：1924634