摘要
桨叶干燥机是目前应用比较广泛的污泥干化处理设备,桨叶干燥机结构简单、紧凑,运行过程中不产生高温和高浓度粉尘,安全性高。以实物样机为参考进行建模,利用计算流体力学(CFD)软件对桨叶干燥机内部推料过程和污泥蒸发过程进行模拟研究。结果显示,圆盘刮片式桨叶具有搅拌作用,可以加速污泥的热量传递,有利于污泥水分进行蒸发,并且有明显的轴向推料作用;污泥蒸发过程的模拟利用UDF自定义蒸发模型,污泥进入到干燥机中经历了快速的升温、饱和温度下的蒸发过程,在出口附近的刮片附近蒸发过程减弱,污泥含水量趋于平稳。模拟结果可为改进桨叶干燥机的结构和提高干燥机的干化效率提供了参考。
Paddle dryer is currently widely used sludge drying equipment,and it is simple and compact in structure.It does not produce high temperature,high concentration and of dust and it shows high safety during operation.The physical prototype was used as a reference for modeling.The computational fluid dynamics(CFD)software was used to simulate the internal pushing process and sludge evaporation process of the blade dryer.The results show that disc scraper paddle had stirring effect.It could accelerate the heat transfer of sludge.It is conducive to sludge evaporation,and there was a clear role in the axial thrust;The sludge evaporation process simulation used UDF custom evaporation model.The sludge entered the dryer,and it experienced rapid warming and the evaporation process at saturation temperature.The evaporation process weakened in the vicinity of the exit of the blade,and the sludge moisture content tended to be stable.The simulation results can provide a reference for improving the structure of the paddle dryer and improving the drying efficiency of the dryer.
作者
付双成
雒维文
陆明佳
袁惠新
刘雪东
郭文元
FU Shuangcheng;LUO Weiwen;LU Mingjia;YUAN Huixin;LIU Xuedong;GUO Wenyuan(School of Mechanical Engineering,Changzhou University,Changzhou 213164,China;Jiangsu Key Laboratory of Green Process Equipment,Changzhou University,Changzhou 213164,China;Sinopec Ningbo Engineering Co., Ltd., Ningbo 315103, China)
出处
《常州大学学报（自然科学版）》
CAS
2020年第2期53-59,共7页
Journal of Changzhou University：Natural Science Edition
基金
中国石化科技开发资助项目(319007-2)。
关键词
污泥干化
推料
蒸发
数值模拟
sludge drying
pushing material
evaporation
numerical simulation
