针对番茄秸秆基质化造肥处理过程中秸秆碎料与发酵菌种难于混合问题,提出立式螺旋混合方法,通过对物料动力学分析、立式螺旋混合的离散元仿真分析和试验,结果表明:混合3min以后,混合均匀度变异系数小于10%,平均功耗小于0.0781k W,验证其对秸秆基质化处理可行性;随搅拌叶片螺距增加混合均匀度得到提高,功耗呈先增大后减小的趋势;随搅拌叶片转速的增加,混合均匀度同样得到提高,功耗呈大幅度提高的趋势;随填料高度的增加,混合均匀度呈降低趋势,功耗呈增加趋势;影响混合均匀度的主次顺序依次为螺距、转速和填料高度;构建了混合均匀度与结构和工作参数的数学模型,并进行优化,得到当填料高度440mm、转速30r/min、螺距400mm时,物料混合均匀度最优为4.3;并将离散元仿真功耗与试验值进行对比,发现误差均值为13.5%,验证了仿真结果的正确性。揭示了其高效混合机理,为研发番茄秸秆碎料与发酵菌种的高效混合专用装置提供了理论依据。 In order to solve the problem that it is difficult to mix straw residue and fermentative bacteria in the process of straw stalk matrix fertilizer making process, a vertical spiral mixing method is proposed. Through the analysis of the material dynamics and discrete element simulation of the vertical spiral mixing, the results show that: After mixing for 3min, the coefficient of variation (CV) was less than 10% and the average power consumption was less than 0.0781k W, which verified the feasibility of straw matrix treatment. The mixing uniformity increased with the increase of pitch of mixing blades, With the increase of rotating speed of mixing blade, the mixing uniformity also increased and the power consumption increased greatly. With the increase of packing height, the mixing uniformity decreased and the power consumption increased. The influence of mixing uniformity The order of the primary and the secondary is the pitch, the rotation speed and the packing height. The mathematical model of the mixing uniformity, the structure and the working parameters is established and optimized. When the packing height is 440mm, the rotation speed is 30r / min and the pitch is 400mm, the material mixing uniformity The best is 4.3; and compared the discrete element simulation power consumption with the experimental value, found that the mean value of the error is 13.5%, which verifies the correctness of the simulation results. The efficient mixing mechanism was revealed, which provided a theoretical basis for the research and development of an efficient mixing device for tomato stalks and fermentation bacteria.