摘要
为了掌握选煤厂筛分车间内煤尘的运动及扩散分布规律,在对煤尘颗粒在特定条件下的运动轨迹建立运动轨迹方程的基础上,借助于计算机软件MATLAB的计算及模拟仿真功能,通过编写程序分别对粒径为1,10和100μm的煤尘运动轨迹进行计算及模拟仿真,得出了这3种粒径煤尘运动轨迹规律的可视化图形,模拟图形较好地体现了煤尘运动的轨迹及扩散分布的变化趋势:粒径越小的煤尘颗粒随气流上下波动的范围和弧度就越大;当粒径为1μm时,煤尘可以完全随气流飘扬脉动,随着颗粒直径的增大,脉动运动受重力的作用而衰减,当煤尘粒径为100μm时,煤尘基本上随气流脉动很小,在重力的作用下将慢慢沉降。
In order to understand the movement and diffusion distribution law of the coal dust in the screening workshop of the coal preparation plant,based on the movement trace equation established with the movement traces of the coal dust particles under certain conditions,with the calculation and simulation functions of the computer software MATLAB,the programming was applied to calculate and similarly simulate the coal dust moving traces with particles of 1,10 and 100 μm individually.The visualized figures of the three particle diameter coal dust moving trace law were obtained and the simulated figures could be well to show the coal dust moving trace and the diffusion distribution variation tendency.With the diameter of the coal dust particles getting smaller,the scope and radian of the airflow up and down fluctuating would be getting larger.When the particle diameter was 1 μm,the coal dust would be pulsated fully with the airflow fluctuating.With the particle diameter increased,the pulsation movement under the role of the gravity force would be reduced.When the coal dust particle diameter was 100 μm,the coal dust would be basically low with the airflow pulsating and would be slowly settled down under the role of the gravity force.
出处
《煤炭科学技术》
CAS
北大核心
2010年第10期45-47,共3页
Coal Science and Technology
基金
毕节学院2009年度科学研究基金资助项目(20092026)
