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Prediction of power of a vibration rod mill during cellulose decrystallization processing by DEM
Advanced Powder Technology ( IF 5.2 ) Pub Date : 2021-09-10 , DOI: 10.1016/j.apt.2021.08.027
Tomoya Wada 1 , Takafumi Uematsu 2 , Hiroyuki Shiomi 3 , Kazutomo Osaki 1 , Shingo Ishihara 4 , Junya Kano 4
Affiliation  

The crystallinity index of cellulose decrystallized with a vibration rod mill was well correlated with input energy of the vibration rod mill. In order to predict the energy, rod behavior was simulated by discrete element method (DEM).

Decrystallization of cellulose was performed using a vibration rod mill to increase the reactivity. The decrystallization speed increased with an increase in the number of rods and the crystallinity index of cellulose after pulverization can be uniquely identified by the input energy [kWh/kg], which is actual power times pulverization time divided by cellulose mass charged into the vibration rod mill. Therefore, the actual power of the vibration rod mill was calculated using DEM simulation, wherein rods were constructed by connecting spherical particles using the multi-sphere method. The coefficients of friction and restitution were determined based on the movement of the rod in the mill cylinder from the experiments. The power calculated agrees with the actual power. This study suggests that the power of the vibration rod mill can be predicted using DEM and that the crystallinity index can be predicted without experimentation.



中文翻译:

DEM预测纤维素解结晶过程中振动棒磨机的功率

用振动棒磨机脱晶的纤维素的结晶度指数与振动棒磨机的输入能量密切相关。为了预测能量,通过离散元法(DEM)模拟杆行为。

使用振动棒磨机进行纤维素的解结晶以增加反应性。解晶速度随着棒数的增加而增加,粉碎后纤维素的结晶度指数可以通过输入能量[kWh/kg]唯一确定,即实际功率乘以粉碎时间除以加入振动棒的纤维素质量磨。因此,振动棒磨机的实际功率使用DEM模拟计算,其中棒是通过使用多球法连接球形颗粒来构建的。摩擦系数和恢复系数是根据实验中棒在磨机圆筒中的运动确定的。计算出的功率与实际功率一致。

更新日期:2021-10-01
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