摘要
针对小粒径煤尘因电荷量微弱导致其浓度测量准确度较低的问题,选取康达效应管道内效应体不同管径比所对应的煤尘颗粒运动速度以及静电感应量进行研究,从而进行管径比的寻优。利用Gambit2.4建立模型,用Fluent6.3进行模型仿真,将煤尘粒径设定为1μm,通过煤尘速度云图获得不同管径比下的速度值,在MATLAB中计算获取煤尘相应的静电感应量。结果表明:改进装置的管径长度L取20cm,当效应体的管径比(d/D)为0.6,即测量管道的效应体最大处d取3.6cm和管道直径D取6cm时,煤尘的静电感应量最大,因而管径比0.6时为最优。
In view of the low accuracy of concentration measurement caused by small particle size coal dust due to weak charge,the motion velocity and electrostatic induction of coal dust particles corresponding to different pipe-diameter ratios of effector in Kangda effect pipeline were studied,so as to optimize the pipe-diameter ratio.Gambit2.4 was used for building the model,Fluent6.3 was used for model simulation,and the coal dust particle size was set as 1μm.The velocity value under different pipe-diameter ratios was obtained through the coal dust velocity cloud map,and the corresponding electrostatic induction amount of coal dust was calculated by MATLAB.The results show that when the diameter length Lof the improved device is20 cm and the pipe-diameter ratio(d/D)of the effector is 0.6,that is,when the maximum diameter of the measured pipeline effector is 3.6 cm and the diameter of the pipeline is 6 cm,the electrostatic induction amount of coal dust reaches the maximum,so the optimal pipe-diameter ratio is about 0.6.
作者
刘丹丹
景明明
李德文
汤春瑞
颜鸽来
姜全军
马权
孙枫皓
LIU Dandan;JING Mingming;LI Dewen;TANG Chunrui;YAN Gelai;JIANG Quanjun;MA Quan;SUN Fenghao(Institute of Electrical and Control Engineering,Heilongjiang University of Science and Technology,Harbin,Heilongjiang 150022,China;China Coal Technology Engineering Group Chongqing Research Institute,Chongqing 400037,China;GD Power Dalian Development Area Co-Generation Power Plant,Dalian,Liaoning 116600,China;School of Mechanical Engineering,Northeast Electric Power University,Jilin,Jilin 132012,China)
出处
《矿业研究与开发》
CAS
北大核心
2020年第7期140-144,共5页
Mining Research and Development
基金
国家重点研发计划项目(2016YFF0102800,2017YFC0805208)
黑龙江科技大学研究生创新科研项目(YJSCX2019-207HKD)。
关键词
静电感应
小粒径煤尘
康达效应
CFD建模仿真
管径比寻优
Electrostatic induction
Small-size coal dust
Coanda effect
CFD modeling and simulation
Pipe-diameter ratio optimization
