综掘面风幕集尘除尘系统的参数优化与数值模拟

Parameter Optimization and Numerical Simulation of Dust-collecting and Dedusting System with Air Curtain in Fully Mechanized Excavation Face

针对目前井下综掘面粉尘治理难的问题,研制了一种新型风幕集尘除尘系统。其中风幕风机的风速、除尘风筒的结构尺寸及出口压力是影响整个系统集尘除尘效果的决定性因素。为使风幕集尘除尘系统的防治粉尘效果达到最优,通过计算流体力学FLUENT软件,分析风幕风机风速、除尘风筒直径及出口压力改变的条件下风机的表面空气流线以及粉尘颗粒轨迹。得到风机风速、除尘风筒的直径及出口压力对整个系统集尘除尘效果影响的规律。结果表明:单方面增加风幕风机的风速或出口压力时,系统的集尘除尘效果在一定范围内可以变好,但是超过一定范围之后,风速的增加或者出口压力的增大反而使系统集尘除尘效果变差;在其他条件不变的情况下,除尘风筒直径越大系统集尘除尘效果越好。

Based on the problems of dust-prevention in mine tunnel,a new type of dust collecting and dedusting system with air curtain was developed.The air-curtain fan speed,the structure size and pressure of dedusting duct were the key factors affecting dust collecting and dedusting effect of the whole system.In order to achieve optimal effect of dust control system,path lines of the air-curtain fan surface and tracks of dust particle were simulated by using FLUENT computational fluid dynamics software under the condition of the variation of fan＇s speed and dedusting duct＇s diameter and outlet pressure.The law of how the fan speed and the diameter and outlet pressure of dedusting duct affecting the whole system was obtained.The results show that,when fan speed or outlet pressure increases singly,the dust removal effect of the system becomes better under a certain extent,and then becomes worse beyond the certain extent.When other conditions are unaltered,the dust removal effect becomes better with the increase of dedusting duct diameter.