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针对以往风幕存在不能全断面封闭掘进工作面的问题,设计了一种240°弧形风幕控尘除尘机除尘系统,利用流体力学计算软件Fluent对此系统的风幕宽度、除尘机压力、风幕与吸尘口距离和除尘效果进行了模拟。结果表明:当局扇提供的风量为280 m~3/min,风幕宽度为50 mm时,抗扩散能力较弱,风幕宽度为100 mm时,风幕风速分布较均匀,抗扩散能力较强,风幕宽度选取150 mm时,末速度达不到阻尘的作用;在风幕宽度为100 mm、风幕距除尘机吸尘口2.4 m的条件下,除尘机压力为-400 Pa和-500 Pa时,不利于粉尘的排出,除尘机压力为-250 Pa和-350 Pa时除尘效果较好;在风幕宽度为100mm、除尘机压力为-350 Pa的条件下,风幕距除尘机吸尘口距离小于2.0m时,不利于粉尘的排出,间距大于2.4 m时除尘效果良好;当风幕宽度为100mm、风幕与吸尘口间距2.4 m时,除尘机压力-350 Pa比-250 Pa更有利于粉尘的排出。研究表明,240°弧形风幕控尘除尘机除尘系统在合理的工况参数下除尘效果更好。
Aiming at the problem that the conventional air curtain can not be fully closed with tunneling face, a 240 ° curved air curtain dust control system is designed. By using the software Fluent of hydrodynamics, the width of the air curtain, the pressure of the dust collector, Air curtain and suction port distance and dust removal effects were simulated. The results show that when the air volume provided by the fan is 280 m ~ 3 / min and the width of the air curtain is 50 mm, the anti-proliferation ability is weak. When the width of the air curtain is 100 mm, the air velocity distribution of the air curtain is more uniform and the anti-proliferation ability is stronger , When the wind curtain width is 150mm, the final velocity can not reach the dust blocking effect; under the condition that the wind curtain width is 100mm and the wind curtain is 2.4m away from the dust suction port of the dust collector, the dust pressure is -400 Pa and - 500 Pa, is not conducive to the discharge of dust, dust collector pressure of -250 Pa and -350 Pa when the dust removal effect is good; the wind curtain width of 100mm, dust collector pressure of -350 Pa conditions, Dust suction distance less than 2.0m, is not conducive to the dust discharge, when the spacing is greater than 2.4 m when the dust removal effect is good; when the wind curtain width of 100mm, air curtain and suction port spacing of 2.4m, the dust pressure -350 Pa - 250 Pa is more conducive to the discharge of dust. The research shows that the dust removal system of 240 ° curved air curtain dust collector has better dust removing effect under the reasonable operating parameters.