掘进工作面泡沫发泡器性能研究及应用

Research and Application on Performance of Foam Generator Used in Heading Face

针对目前煤矿作业面降尘困难的问题,提出了泡沫降尘技术,探讨了泡沫形成的机理,并基于该机理设计了泡沫发泡器。通过对该发泡器的性能测试,得到发泡器的启动风压约为0.1 MPa;当风压增加时,最大供液量不断增加,但发泡量以0.5 MPa左右为分界点,先增加,后减少,同时经线性拟合推导出该发泡器最大发泡倍数的风压值。现场实践表明,对比水雾降尘,采用该泡沫降尘技术后,全尘和呼吸性粉尘浓度分别降低了52%和60%,降尘效果显著。

To aim at the difficult dust removal problems in the working face in the coal mine at present,the dust removal technology by foam was proposed. In this paper,the foam formation mechanism was discussed,and based on the foam formation mechanism,a foam generator was designed. Through the performance test of the foam generator,the start air pressure of0. 1 MPa of the foam generator was obtained; when the air pressure increased,the maximum liquid supply volume increased,but the foaming volume first increased and then decreased by about 0. 5 MPa as a cut- off point. At the same time,the biggest air pressure value of the foaming expansion ratio of the foam generator was derived by the linear fitting. The site practice showed that the foam dust removal technology can reduce the total dust concentration by 52% and the respirable dust concentration by60% as compared to the dust removal technology by water spray,so it has significant dust removal effect.