大采高综采面液压支架喷雾降尘方法改进与应用

发布时间：2018-10-31 11:10

【摘要】：针对大采高综采工作面粉尘污染严重的问题,基于相位多普勒激光干涉仪PDI200MD的雾化特性试验,分别测定6种喷雾降尘常用喷嘴在8 MPa喷雾压力下的宏观雾化特性,以及1.2 m/s扰动风流下的雾滴粒径分布,并根据试验结果设计了文丘里负压喷雾器以及液压支架喷雾降尘方法,最后通过现场粉尘浓度测定考察其应用效果。结果表明:孔径为2.2 mm的含X形导流芯混合式广角实心圆锥形喷嘴的雾化特性最佳,其在8 MPa喷射压力下,雾化角为73.5°,有效射程为5.3 m,流量为7.05 L/min;在1.2 m/s扰动风流影响下,特征粒径D_(0.5)、Sauter平均粒径D_(32)以及Herdan平均粒径D_(43)分别为38.541、33.951、41.162μm,雾滴轴向速度为26.415~57.468 m/s。液压支架喷雾降尘方法应用后,工作面采样点的总尘及呼尘浓度较传统喷雾降尘方法均出现明显降低,其平均总尘降尘率为86.4%,平均呼尘降尘率为82.5%。
[Abstract]:Aiming at the serious problem of dust pollution in fully mechanized mining face with large mining height, based on the atomization characteristic test of phase Doppler laser interferometer (PDI200MD), the macroscopic atomization characteristics of six kinds of commonly used spray-dust control nozzles under 8 MPa spray pressure were measured respectively. And the particle size distribution of droplet under 1.2 m / s disturbance wind flow. Based on the experimental results, the Venturi negative pressure atomizer and hydraulic support were designed for dust control. Finally, the application effect was investigated by field dust concentration measurement. The results show that the spray characteristics of the mixed wide-angle solid conical nozzle with X-shaped guide core of 2.2 mm are the best. At 8 MPa injection pressure, the atomization angle is 73.5 掳, the effective range is 5.3 m, and the flow rate is 7.05 L / min. Under the influence of 1.2 m / s disturbed wind flow, the average particle size D _ (32) of characteristic particle size D0.5), Sauter and that of Herdan are 38.541 ~ 33.951 渭 m and 41.162 渭 m, respectively, and the axial velocity of droplet is 26.415 ~ 57.468 mm / s. After the application of the spray dust control method of hydraulic support, the total dust and the dust concentration of the sampling point in the working face are obviously lower than those of the traditional spray dust control method, the average total dust reduction rate is 86.44.The average dust removal rate is 82.5.
【作者单位】：枣庄矿业(集团)付村煤业有限公司;
【基金】：国家自然科学基金面上资助项目(51474139) 山东省重点研发计划资助项目(2016GSF120002) 青岛市科技计划资助项目(16-6-2-52-nsh) 中国博士后科学基金第九批特别资助项目(2016T90642) 青岛市博士后研究人员应用研究资助项目(2015194)
【分类号】：TD714.4

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