高压细水雾耦合机械通风系统降温除湿技术

Study on Cooling and Dehumidifying Technology under the Joint Action of High Pressure Water Mist and hazard Ventilation System

目的模拟研究高温巷道内温度、湿度变化规律,改善深部开采环境,解决热害问题.方法利用Gambit软件建立水平长度为40 m的高温高湿巷道数值模型并进行网格处理,采用CFD软件Fluent的k-ε模型、组分运输模型和离散相模型,对细水雾三种不同开启关闭时间工况下,高温高湿巷道内温度、湿度变化规律进行对比分析.结果当机械送风温度为25℃,细水雾供水温度为15℃,细水雾启闭周期各为5 s和10 s时,水平巷道内的温度能够降到28℃以下,并且湿度可以满足生产要求.结论水平长度为40 m的高温高湿巷道内,周期性运行的高压细水雾耦合机械通风系统能够实现对井下高温高湿环境的有效控制.

To improve environment of the deep mine and solve the problem of heat hazard,the temperature and humidity variation lawin the high temperature tunnel was studied in this paper. A40 m long tunnel model was built and meshed with the software Gambit. The k-ε model,the species transport model and the discrete phase model in CFD software Fluent were used for comparative analysis on the temperature and humidity evolution lawin the high temperature and high humidity tunnel. It is found that when the supplying air temperature and the water mist temperature are 25 ℃and 15 ℃,the operation and the shut interval of water mist are 5s and 10 s respectively,the tunnel temperature is dropped to 28 ℃. And the humidity can also meet production requirements. Conclusion is that the periodic operation of water mist jointed with the mechanical ventilation system can effectively control the temperature and humidity in the high temperature and high humidity tunnel.