Abstract

In order to clarify the influence of air velocity on the atomization effect of shearer external spray and optimize dust suppression performance, the dust removal experiment was carried out by utilizing the self-designed external spray experiment platform. The effect of three kinds of air velocity on the atomization effect of main spray parameters was investigated to clarify the influence of air velocity on the atomization effect of shearer external spray and optimize dust suppression performance. The results showed that the influence of air velocity on droplet size and distribution width of the droplet size was slightly less than the spray pressure. The average diameter of the droplet was 54.211 μm, and the particle size distribution of the droplet was more uniform and concentrated when air velocity was 2 m/s, the pressure was 5 MPa and nozzle diameter was 1.0 mm. When the air velocity was less than 2 m/s and the spray pressure was 3–5 MPa, the atomization effect was better by using 1.0 or 1.2 mm diameter nozzle. Through on-site applications and optimization, the leeward total dust removal efficiency of the shearer can reach 79.43%, and the maximum increase range can reach 18.51 percentage points. The respiratory dust removal efficiency of the shearer can reach 87.45%, and the maximum increase range can reach 11.87 percentage points.

摘要

为了弄清风速对采煤机外喷雾雾化效果的影响，优化除尘性能，利用自行设计的外喷雾实验平台进行了除尘实验。研究了三种风速对主要喷雾参数雾化效果的影响，以阐明风速对采煤机外喷雾雾化效果的影响，并优化了抑尘性能。结果表明，风速对液滴尺寸和液滴宽度分布宽度的影响略小于喷射压力。液滴的平均直径为54.211μm，当风速为2 m / s时，液滴的粒径分布更加均匀集中。压力为5MPa，喷嘴直径为1.0mm。当风速小于2 m / s，喷射压力为3-5 MPa时，使用直径为1.0或1.2 mm的喷嘴雾化效果更好。通过现场应用和优化，该采煤机的背风除尘总效率可以达到79.43％，最大增加范围可以达到18.51个百分点。采煤机的呼吸除尘效率可以达到87.45％，最大增加范围可以达到11.87个百分点。最大增长幅度可以达到18.51个百分点。采煤机的呼吸除尘效率可以达到87.45％，最大增加范围可以达到11.87个百分点。最大增长幅度可以达到18.51个百分点。采煤机的呼吸除尘效率可以达到87.45％，最大增加范围可以达到11.87个百分点。