Research on dust concentration measurement device based on spiral flow

International Conference on Manufacturing Technology, Materials and Chemical Engineering

材料科学;化学工业

Dandan, Liu^1 ; Wu, Ma^1 ; L., Dewen ; W., Jie ; J., Mingming ; T., Chunrui

College of Electrical and Control Engineering, Heilongjiang University of Science and Technology, Heilongjiang, Harbin

150022, China^1

China Coal Technology Engineering Group, Chongqing Research Institute, Chongqing

400037, China^2

关键词: Cylindrical pipes;    Dust concentration measurements;    Electrostatic induction;    Induced charges;    Low concentrations;    Measuring device;    Movement speed;    Small particle size;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/592/1/012185/pdf
DOI  :  10.1088/1757-899X/592/1/012185

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Based on the principle of electrostatic induction, a dust detection device is designed in this paper, aiming at the problems of insensitive detection and slow movement of dust particles in the existing dust measuring devices. Its shape structure is improved on the basis of the existing straight pipe. The air inlet is arranged on the side of the cylindrical pipe wall so that the particles flow through the pipe in a double helix way and the diameter of the main pipe is changed to make the middle part of the pipe shrink. The 3D model of pipeline was established by gambit2.4 and simulated in Fluent6.3. In the improved device, the movement speed of dust particles increases. With the increase of velocity, the probability of friction and collision of dust particles in the side-entry tube is increased, and the induced charge is increased.Therefore, the improved device can effectively improve the accuracy of dust measurement under the condition of low concentration and small particle size.