Optimization and experiment of operating parameters for walnut shell and kernel separator
In view of the problems of incomplete separation and entrainment loss in existing walnut shell separation equipment,a two-stage tandem walnut shell separator was designed,which can separate whole kernel,crushed kernel and fruit shell at one time.To determine the optimal operating parameters,the response surface center combination design was used,with walnut shell impurity rate and loss rate as assessment indicators,and feeding speed(x1),wind plate 1 inclination angle(x2),wind plate 2 inclination angle(x3),wind speed of fan 1(x4),and wind speed of fan 2(x5)as experimental factors.The working parameters of the device were optimized and tested.Design-expert software was used to establish a quadratic polynomial regression model and perform variance analysis.The factor contribution rate method was used to obtain the primary and secondary factors affecting impurity rate and loss rate.The results show that the R2 values of the model with impurity rate and loss rate were 0.973 1 and 0.953 0,respectively.The second-order polynomial regression model between the clutter rate,loss rate and parameters had a good fit.The feed speed,wind speed of fan 1,and wind speed of fan 2 had significant effects on the impurity content,and the inclination angle of wind plate 1,wind speed of fan 1,and wind speed of fan 2 had significant effects on the impurity content,the interaction terms x1x2,x1x3,x1x4,x2x5,and x3x5 had significant influence on the impurity content.The interaction terms x1x2,x1x3,and x3x4 had significant effects on the loss rate.The verification test results showed that when the feeding speed was 0.15 kg/s,the wind plate 1 inclination angle was 39°,the wind plate 2 inclination angle was 34°,the wind speed of fan 1 was 20 m/s,and the wind speed of fan 2 was 14 m/s,the impurity rate was 4.75%,the loss rate was 8.41%,and the relative error between the verification test results and the model prediction value was less than 5%.This study provides references for the improvement of walnut shell and kernel separator.
walnutshell and kernel separatorresponse surface methodologyparameter optimization
万方数据
维普
