Design and Application of Outer Spray Device for Coal Mine Boring Machine
Aiming at the problems of high water consumption and low dust removal efficiency of the current external spray device of roadheader in comprehensive excavation face,a new type of external spray device is designed.The device adopts internal mixing air-assisted atomizing nozzle,which has the characteristics of low water consumption,good atomization effect and high dust removal efficiency.The optimal arrangement of nozzle and operating condition of the device are obtained by numerical simulation.It is applied to the scene,testing the dust removal efficiency.Results show that the device can effectively reduce the dust concentration in the working face of the road header,and the dust removal efficiency of the total dust and respirable dust are 90.9%and 77.1%,respectively.
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