天台山隧道喷雾降尘雾化性能研究

Study on the Atomization Performance of Tiantaishan Tunnel Spray Dust Reduction

为进一步提高隧道喷雾降尘的效率,得到有利的环境及设备参数,文章以天台山隧道施工产生的粉尘为研究对象,结合数值模拟方法,深入研究了高压喷雾雾化粒度的降尘性能;基于FLUENT压力-旋流雾化模型,分析了高压喷雾降尘的机理,通过对压力式喷嘴进行2MPa,3MPa,4MPa和5MPa共4种压力的模拟和直径为2.0mm,1.5mm,1.0mm共3种喷嘴的模拟,得到了不同情况下的喷雾粒度分布,结合实测的天台山隧道施工粉尘粒度,提出了适合现场的喷雾降尘压力和喷雾型号。

In order to further improve the efficiency of tunnel spray dust reduction and obtain favorable environment and equipment parameters,this paper took the dust generated by Tiantai tunnel construction as the research object,combined with the numerical simulation method,to deeply study the dust reduction performance of high-pressure spray atomization particle size.Based on the FLUENT pressure-swirl atomization model,the mechanism of high-pressure spray dust reduction was analyzed,and the pressure nozzle was simulated in pressures of2 MPa,3 MPa,4 MPa,5 MPa,and in diameter of 1.0 mm,1.5 mm,2.0 mm,and the spray particle size distribution was obtained under different conditions.Combined with the measured Tiantaishan tunnel construction dust granularity,the suitable spray dust pressure and diameter for the scene are put forward.