Abstract To guarantee the stable and quantitative adding of surfactant into the pressure pipe and not be affected by the inlet and outlet pressure changing, the method utilizing jet pump cavitation characteristics to add surfactant was proposed. Keeping pressure ratio lower than the critical pressure ratio, the adding quantity could remain unchanged. In order to improve the stabilities, reduce the pressure loss and improve the critical pressure ratio of the jet cavitation adding method, a new two-stage cavitation jet adding method and device were proposed, and the performance was investigated experimentally under different working flows and outlet pressures, and compared to the cavitation jet pump in this paper. The results showed that the negative pressure remained unchanged within a certain range of outlet pressure, then decreased gradually with the increase of outlet pressure for the new device, which was similar with the traditional one. Furthermore, the critical pressure ratio of the new device was larger than the traditional one, which indicated that the pressure loss for the new device was smaller and it was more stable as the adding amount of surfactant was constant. In addition, the critical pressure ratio could increase by reducing the additive proportion of surfactant. Based on the above contributions and field investigation, it is believed that the study will play an important role for automatic quantitative control.

中文翻译：

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一种新型矿井粉尘控制添加表面活性剂装置的试验研究

摘要 为保证压力管中表面活性剂的加入量稳定、定量，不受进出口压力变化的影响，提出了利用喷射泵空化特性加入表面活性剂的方法。保持压力比低于临界压力比，添加量可以保持不变。为提高射流空化添加方法的稳定性，降低压力损失，提高临界压力比，提出了一种新的两级空化射流添加方法和装置，并在不同的工作流量和出口下对其性能进行了实验研究。压力，并与本文中的空化喷射泵进行比较。结果表明，在一定的出口压力范围内，负压保持不变，然后随着新装置出口压力的增加而逐渐降低，与传统装置相似。此外，新装置的临界压力比大于传统装置，这表明新装置的压力损失更小，且表面活性剂添加量恒定时更稳定。此外，降低表面活性剂的添加比例可以提高临界压力比。基于以上贡献和实地调查，相信该研究将对自动定量控制起到重要作用。这表明新装置的压力损失更小，而且随着表面活性剂添加量的恒定，压力损失更稳定。此外，降低表面活性剂的添加比例可以提高临界压力比。基于以上贡献和实地调查，相信该研究将对自动定量控制起到重要作用。这表明新装置的压力损失更小，而且随着表面活性剂添加量的恒定，压力损失更稳定。此外，降低表面活性剂的添加比例可以提高临界压力比。基于以上贡献和实地调查，相信该研究将对自动定量控制起到重要作用。