中文摘要：

为实现有机肥颗粒物料的高效干燥,提出了专用三回程转筒干燥工艺,着重对影响有机肥颗粒运动的中筒内抄板设计参数进行研究。分析了抄板的作用原理,设计出在中筒可以实现物料逆向＂爬坡＂的组合式抄板;应用EDEM离散元软件,通过正交试验设计,确定物料在中筒内停留时间的显著性影响因素为转筒安装倾角和组合抄板平面滑板角;通过试验验证,完成了转筒倾角和组合抄板平面滑板角对物料停留时间影响的单因素试验,建立了相应的数学模型;通过对试验结果和仿真分析结果对比分析,经偏移修正后的仿真模型可以很好地预测物料在中筒内的停留时间;根据试验结果,转筒安装倾角不超过5°、组合抄板平面滑板角不小于40°时干燥效果好。

英文摘要：

Pelleting is an effective way to store and utilize organic fertilizer. A key step is to dry after pelleting. At present,one-zone rotary drying is often used for drying organic fertilizer pellets. But it has many problems,such as high energy consumption and etc. To guarantee the efficiency and high quality of the organic fertilizer in drying process,a triple-pass rotary drum drying technology was introduced.Therefore,the problems of long overall length,large occupied area and low plant utilization factor can be solved. This study combines the advantages of triple-pass rotary drum dryer. To explore the relationship among the residence time in the drum,the structure parameter of flight,and the drum installation angle,the EDEM software was used to simulate the movements of the pellets in the drum. The principle of the flight was analyzed,and a new type of combined flight was designed. The residence time in middle drum testing apparatus was set up, and the single-factor experiment design was conducted. Then, the significant factors on residence time were obtained by using orthogonal experiments,which turned out to be the drum installation angles and flight angles. The results of the simulation and experiment were compared,and it＇s verified a very highly prediction on the residence time and optimized parameters of the drum installation angle. Finally,the experiments showed that the installation angle should be less than 5° and flight angle should be higher than 40°.