基于分离式热管技术矿井回风低温余热利用研究

Utilization of low-temperature waste heat from mine return air based on separated heat pipe technology

为了提取矿井回风余热并进行远距离输送和利用,结合矿井回风含湿量高、回风量大的特点和热管换热系统传热理论计算,实验设计了一套应用于矿井回风余热回收的重力型分体式热管送风系统。通过将回收的低温回风余热传送至矿井新风平台并对其进行预热,满足井口防冻热需求,实现了低温热源提取及实际工业应用;并对本换热系统部分换热模块进行连续三天有效测试。结果表明,本换热系统可将低温新风温度提高12~16.5℃,达到了井口防冻目的。研究成果具有工业实际应用价值。

To extract and transport the residual heat from mine return air over long distances,and considering the high moisture content and large volume of return air,along with the heat transfer theory of heat pipe systems,this paper designs a gravity-type split heat pipe air supply system for mine return air heat recovery.This system can transfer the recovered low-temperature residual heat to the mines fresh air platform for preheating,meeting the anti-freezing heat demand at the mine shaft entrance and successfully realizing the extraction of low-temperature heat sources for industrial application.Through continuous three-day testing of certain heat exchange modules,the results show that the system can raise the temperature of low-temperature fresh air by 12℃to 16.5℃,achieving the goal of preventing freezing at the shaft entrance.These findings demonstrate practical industrial application value.