Research on spray dust removal technology of underground electromechanical conveyor in coal mine
A large amount of dust produced during the underground transportation in coal mine would seriously affect the safety of coal mine production.The common dust removal method was spray dust removal,and the nozzle structure and flow parameters were important factors affecting the dust removal effect of spray.CFD software was used to model the dust fall of nozzle spray and analyze the influence of nozzle inlet/outlet pore size and cone angle changes on the nozzle atomization effect.Through the software simulation of water flow distribution in the analysis domain after nozzle atomization,it was found that for the conical nozzle,in order to accommodate both coverage range and dust removal efficiency,the nozzle outlet pore size should be optimized at 2.5 mm,the inner diameter of the inlet section should be optimized at 6.5 mm,the length of the inlet section should be selected at 5 mm which had the largest high-speed area in the flow field,and the preferred cone angle should be 120°.
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