压风射流添加发泡剂装置性能实验研究及应用

发布时间：2018-02-23 22:26

本文关键词： 压风射流器发泡剂吸液量降尘　出处：《中国矿业大学学报》2015年02期 　论文类型：期刊论文

【摘要】：根据井下掘进面风量大、水压低的特点,提出了压风射流添加发泡剂的理念.实验表明,压风射流器吸液量随出口压力减小而增大,当出口压力减小到一定值后,吸液量达到最大值并维持不变;进口压力升高,吸液量增大,但增大的程度减小,且出口压力越高,达到超临界吸液所需的进口风压越大;射流器在超临界吸液时,吸液量越小,临界出口压力越大,装置驱动性能越强;压风射流器应用于煤矿井下泡沫降尘时,确保了发泡剂的小流量稳定添加,降低了泡沫成本,简化了系统操作,尤其适用于高强度硬岩巷道掘进降尘,泡沫降尘效率可达82.3%~87.9%,远高于水雾降尘效率,取得了理想的降尘效果.
[Abstract]:According to the characteristics of large air volume and low water pressure, the idea of adding foaming agent to pressurized air jet is put forward. The experimental results show that the liquid absorption of pressurized air jet increases with the decrease of outlet pressure, and when the outlet pressure decreases to a certain value, When the inlet pressure increases, the amount of liquid absorption increases, but the degree of increase decreases, and the higher the outlet pressure, the greater the inlet wind pressure required for supercritical fluid absorption. The smaller the amount of liquid absorption, the greater the critical outlet pressure, and the stronger the driving performance of the device. When the pressurized air jet device is applied to the downhole foam dust control in coal mines, it ensures the stable addition of foaming agent, reduces the foam cost, and simplifies the system operation. It is especially suitable for driving dust in high strength hard rock roadway. The efficiency of foam dust control can reach 82.3% and 87.9%, which is much higher than that of water mist, and the ideal dust control effect is obtained.
【作者单位】：中国矿业大学安全工程学院;中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室;
【基金】：国家自然科学基金项目(51474216);国家自然科学基金煤炭联合基金重点项目(51134020)
【分类号】：TD714.4

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