摘要
为解决煤矿生产过程中的高温热害问题,基于煤矿采掘工作面的空间特征和工艺特点,提出了以液态CO_2作为冷源的高温矿井液态CO_2相变制冷降温技术,运用液态CO_2相变释放的冷量与工作面的高温空气进行换热作用,降低工作面的环境温度及湿度,同时将相变产生的气态CO_2注入采空区防治煤自燃。液态CO_2相变制冷降温系统具有装置结构简单、操作方便、设备投入成本低、适应性强等优点。在板石煤矿52305掘进工作面进行液态CO_2相变制冷降温技术的工业性试验。结果表明,液态CO_2的平均消耗速率为1.015 m3/h时,掘进工作面空气温度降低了6.9℃,含湿量减少4.94g/kg,液态CO_2的冷量利用率为77.36%。液态CO_2相变制冷降温技术能够有效改善井下工作环境,具有较强的推广和应用前景。
In order to solve a high temperature and thermal disaster problems occurred in the production process of the coal mine,based on the space features and technique characteristics of the heading face in the coal mine,a liquid carbon dioxide phase-change refrigeration and cooling technology with the liquid carbon dioxide as the cooling sources of the high temperature coal mine was provided. The cooling volume released from the liquid carbon dioxide phase-change refrigeration and the high temperature air from the heading face were applied to the heat exchange role conducted to reduce the environment temperature and humidity of the heading face. Meanwhile,the gas phase carbon dioxide from the phase-change would be injected to the goaf in order to prevent and control the coal spontaneous combustion. The liquid carbon dioxide phase-change refrigeration and cooling system would have a simple structure device,a convenient operation,low invested cost equipment,high suitability and other advantages. A industrial trial of the liquid carbon dioxide phase-change refrigeration and cooling technology was conducted in No. 52305 heading face of Banshi Mine. The results showed that when an average consumption rate of the liquid carbon dioxide was 1.015 m^3/h,the air temperature of the heading face was reduced by 6. 9 ℃,the humidity was reduced by4.94 g/kg and the utilization rate of the liquid carbon dioxide cooling volume was 77.36%. The liquid carbon dioxide phase-change refrigeration and cooling technology could effectively improve the working environment in the underground mine and would have the high prospects of the promotion and application.
出处
《煤炭科学技术》
CAS
北大核心
2017年第10期82-87,共6页
Coal Science and Technology
基金
国家自然科学基金资助项目(51274115)
煤矿安全开采技术湖南省重点实验室开放基金资助项目(201501)
关键词
高温矿井
降温技术
液态CO2
相变制冷
high temperature mine
cooling technology
liquid carbon dioxide
phase-change refrigeration
