基于EDEM的棉秸秆皮质髓清选装置设计与试验OA

In view of the complex composition of the extracted products from cotton straw crushing,the significant loss of xylem and high impurity rate after cleaning,a cleaning device for cotton cortical pulp was designed based on the physical characteristics of the material components.The structure and motion parameters of the cleaning device were designed and optimized through theoretical analysis and EDEM discrete element software.The motion state of material particles on the screen surface was analyzed to determine the main factors affecting the screening effect.The single-factor tests were con-ducted to determine the value ranges of vibration frequency,vibration amplitude and screen inclination angle.The vibra-tion frequency,vibration amplitude and screen inclination angle were selected as test factors,and the loss rate and impuri-ty rate of the xylem of cotton straw were used as evaluation indicators.Through three-factor and three-level response sur-face tests,regression models of each factor and the loss rate and impurity rate were respectively constructed.The factors and their interaction effects were analyzed to determine the optimal parameter combination of the cleaning device.The test results showed that the screening effect of the cleaning device was the best when the vibration frequency was 14.9 Hz,the vibration amplitude was 7.8 mm,and the screen inclination angle was 6.0°.The verification test was conducted under this parameter combination.The xylem loss rate was 3.31%,and the impurity rate was 3.18%,and the relative errors between the experimental verification results and the optimized simulation values were all less than 5%,meeting the re-quirements of actual cleaning operations.This research could provide a theoretical basis for the design and optimization of the cotton straw cortical pulp cleaning device.