摘要
为比较不同类型管道输运PM2.5和PM10的特点,采用CFD数值模拟方法,以某矿选矿厂输运管道为模型,基于气固两相流理论,应用Fluent模拟了不同风速下圆管和方管内冲蚀速率大小。结果表明,PM2.5和PM10对管壁最大冲蚀速率值出现位置为圆管较分散,方管较为集中且在管道进口端;圆管管壁最大冲蚀速率及平均冲蚀速率都比方管小,方管管壁最大冲蚀速率值是圆管管壁的3～6.5倍,因此选取管型时应考虑选取圆管作为输运部件;PM2.5和PM10可分别选用风速18、12m/s圆形管道输运较佳,其最大冲蚀速率值分别为1.8×10^(-12)、1.21×10^(-12) kg/(m^2·s);管壁最大冲蚀速率变化趋势,PM2.5比PM10更加具有规律性。
In order to compare the characteristics of PM2.5 and PM10 transported by different types of pipelines, the CFD numerical simulation method is adopted to model the transport pipeline of a certain ore dressing plant , and the pipeline transport velocity with the minimum of the maximum erosion rate is selected . Based on the gas-solid two-phase flow theory, the erosion rate value of circular and square tubes at different wind speeds was simulated by Fluent software. The results show that the appearance position of the maximum erosion rates of PM2.5 and PM10 on the pipeline wall is that the circular pipe is dispersed and the square pipe is more concentrated and at the inlet end of the pipe. Both the maximum erosion rate and average erosion rates of the circular tube wall are smaller, the maximum erosion rate of the square pipe wall is 3-6.5 times that of the circular tube pipe wall, so the circular tube can be considered as the transport part.PM2.5 and PM10 can be transported respectively in round pipe with a speed of 18 and 12 m/s respectively, the maximum erosion rate is respectively 1.8×10 ^-12 , 1.21×10 ^-12 kg/(m ^2·s). The circular pipe has more advantages than the square pipe transportation. The maximum erosion rate and the average erosion rate are small;The changing trend of the wall maximum erosion rate of PM2.5 is more regular than PM10 .
作者
程攀攀
王海宁
梁启超
CHENG Panpan;WANG Haining;LIANG Qichao(School of Resource and Environment Engineering, Jiangxi University of Science and Technology,Ganzhou 341000, China;Key Laboratory of Mining Industry of Jiangxi Province,Ganzhou 341000, China;Shenzhen Job Safety Solutions Company., Ltd., Shenzhen 518000,China)
出处
《有色金属工程》
CAS
北大核心
2019年第5期109-114,共6页
Nonferrous Metals Engineering
