本文選題：噴霧壓力　切入點：采煤機外噴霧　出處：《中國礦業(yè)大學(xué)學(xué)報》2017年01期

【摘要】：基于噴嘴霧化特性測定實驗裝置,對4種應(yīng)用效果較優(yōu)的實心圓錐形霧場噴嘴在2~8MPa噴霧壓力時的宏觀及細(xì)觀霧化特性進(jìn)行了測定.結(jié)果表明:隨著噴霧壓力增大,噴嘴的宏觀霧化特性霧化角不斷減小、射程不斷增大,細(xì)觀霧化特性霧滴粒徑不斷減小,在霧場中,霧滴粒徑隨距噴嘴軸向距離的增大而增大,隨距橫截面中心距離的減小而增大.結(jié)合現(xiàn)場及實驗結(jié)果,優(yōu)選了適于中短距離、大面積降塵且霧滴粒徑較小的噴嘴Ⅲ為采煤機外噴霧噴嘴,并進(jìn)行了現(xiàn)場試驗.結(jié)果表明:隨著噴霧壓力增大,各測點的粉塵濃度、全塵與呼塵降塵率差值均不斷減小,降塵率不斷增大,噴霧壓力為8MPa時霧化降塵效果最優(yōu),全塵、呼塵降塵率平均值分別為81.82%,79.96%.
[Abstract]:Based on the experimental equipment of atomizing characteristics of nozzle, the macroscopic and mesoscopic atomization characteristics of four kinds of solid conical spray field nozzles under 2~8MPa spray pressure are measured. The results show that the atomization characteristics increase with the increase of spray pressure. The atomizing angle and range of the atomizing characteristics of the nozzle are decreasing and the diameter of the atomizing droplet is decreasing. In the fog field, the droplet size increases with the increase of the axial distance from the nozzle. With the decrease of the distance from the center of cross section, the nozzles 鈪，

本文編號：1675347