| ZWP-80 type spray fan is a spray dustfall equipment,commonly used in mines,power plants,construction sites,roads and other dusty workplaces.The spray fan is designed with reference to the structure of the fan and combined with engineering practice experience.From the current field application effect,there are still some problems that need to be improved and optimized,such as short range,small coverage area,poor dust reduction effect and so on.In order to improve the working performance of the spray fan,this paper theoretically calculates its geometric structure,simulates the calculation model based on computational fluid dynamics(CFD),and determines the optimal structural parameter optimization scheme of zwp-80 type spray fan by single factor test and orthogonal test.Through reasonable and effective experiments,the correctness of the simulation results is verified.Comparing the dust reduction performance of spray fan before and after structural parameter optimization,it is proved that the structural optimization scheme is feasible.The main contents of this paper are as follows:(1)The working principle and design theory of spray fan are studied,the isolated blade design method and equal circulation design method are determined,and its key structural parameters are calculated theoretically.The main characteristic parameters such as flow,pressure,power and efficiency of spray fan are analyzed to provide reference for the subsequent determination of dust reduction performance.(2)Using fluent module in ANSYS to simulate the dust reduction process of the initial spray fan,the flow state and corresponding data of the internal and external flow field of the spray fan are obtained.Through the analysis of the simulation results of the spray fan,the dust reduction performance data and structural problems of the spray fan are obtained,which provides the starting point and direction for the follow-up research.(3)Single factor simulation tests are carried out on the structural parameters of the spray fan(air duct shape,air duct outlet diameter,air duct length,number of fan blades,installation angle of fan blades,distance between impeller and inlet,shape of guide vanes,number of guide vanes,length of guide vanes)to determine the optimal value or value range of each factor.For the interrelated structural factors,the simulation test is carried out based on the orthogonal test method,and the calculation formula of the comprehensive index of the dust reduction performance of the spray fan is put forward.The influence order of each parameter is obtained as follows: the outlet diameter of the air duct > the distance between the impeller and the inlet > the shape of the guide vane > the length of the air duct > the length of the guide vane > the number of guide vanes,and the best optimization scheme of the structural parameters of the spray fan is obtained through regression analysis.The comprehensive performance of the spray fan under the optimal scheme is 31.92% higher than that of the initial spray fan.(4)Based on the field experimental conditions,the effects of various structural factors on the dust suppression performance of spray fan are analyzed.Comparing the initial spray fan with the optimized spray fan,the experimental results show that compared with the initial spray fan,the range of the optimized spray fan is increased by 25.37% and the outlet wind speed is increased by 15.95%.The dust reduction effect of the optimized spray fan is significantly improved,and the structural optimization scheme of the spray fan is correct and efficient.Through theoretical analysis,simulation and experiment,this paper studies the influence of the structure of zwp-80 type spray fan on dust reduction performance,and obtains the best design scheme of spray fan structure.The research results enrich the theoretical content of zwp-80 type spray fan and have certain reference significance for improving the development level and dust suppression performance of spray fan.Figure [58] Table [30] Reference [91]... |
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