王彦敏,李金石,刘春,等. 煤矿瓦斯抽采液环真空泵新型降温及余热利用方法研究[J]. 煤矿安全,2024,55(6):59−65. doi: 10.13347/j.cnki.mkaq.20231518
    引用本文: 王彦敏,李金石,刘春,等. 煤矿瓦斯抽采液环真空泵新型降温及余热利用方法研究[J]. 煤矿安全,2024,55(6):59−65. doi: 10.13347/j.cnki.mkaq.20231518
    WANG Yanmin, LI Jinshi, LIU Chun, et al. Research on new cooling and waste heat utilization methods of liquid ring vacuum pump for coal mine gas extraction[J]. Safety in Coal Mines, 2024, 55(6): 59−65. doi: 10.13347/j.cnki.mkaq.20231518
    Citation: WANG Yanmin, LI Jinshi, LIU Chun, et al. Research on new cooling and waste heat utilization methods of liquid ring vacuum pump for coal mine gas extraction[J]. Safety in Coal Mines, 2024, 55(6): 59−65. doi: 10.13347/j.cnki.mkaq.20231518

    煤矿瓦斯抽采液环真空泵新型降温及余热利用方法研究

    Research on new cooling and waste heat utilization methods of liquid ring vacuum pump for coal mine gas extraction

    • 摘要: 瓦斯抽采液环真空泵温度高是导致其运行效率低和使用寿命短的重要原因。基于液环泵无用功耗散理论,定量分析了泵的产热-散热机理,提出了基于低温热泵的瓦斯抽采泵智能降温及余热利用技术,并搭建了工程试验系统,研究了进液温度、工作液流量、环境温度等参数对系统降温效果的影响。以李村煤矿2BEC87型瓦斯抽采泵为试验对象,在吸气负压为−53 kPa、进液流量为10 m3/h时,进液温度可由35 ℃降至16 ℃,运行温度由54 ℃降至45 ℃,降温效果显著;抽采泵运行效率提高了7%以上。

       

      Abstract: The high temperature of gas drainage liquid ring vacuum pump is an important reason for its low operating efficiency and short service life. Based on the wasted power dissipation theory of liquid ring pumps, the heat generation-heat dissipation mechanism of the pump was quantitatively analyzed, and an intelligent cooling and waste heat utilization technology for gas extraction pumps based on low-temperature heat pumps was proposed. An engineering test system was developed to investigate the effects of inlet fluid temperature, operating fluid flow rate, ambient temperature and other parameters on the cooling performance of the system. Taking the 2BEC87 gas extraction pump of Licun Coal Mine as the test object, when the suction negative pressure is -53 kPa and the inlet liquid flow rate is 10 m3/h, the inlet liquid temperature can be reduced from 35 °C to 16 °C, and the operating temperature can be reduced from 54 °C to 45 ℃. The cooling effect is significant, and this technology can improve the operating efficiency of the drainage pump by more than 7%.

       

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