颗粒粉尘在水平管道内运移的三维数值模拟
发布时间：2018-10-09 13:22
【摘要】：矿山粉尘治理需通过选择合理的除尘方法,才能达到较好的降尘效果;目前,带有长管道的机械通风除尘措施是矿山粉尘治理的有效措施之一。随着粉尘在管道内长时间排出,管道内势必会产生沉积现象。应用计算流体力学软件FLUENT 6.3.26对不同粒径的二氧化硅粉尘颗粒在水平通风管道内的沉积规律进行模拟计算,其中通风管道管径D=500mm,长度l=20 m,送风速度v=12 m·s~(-1)。模拟结果表明:微颗粒(100μm)在管道内停留时间较短,最长时间为3.91 s,受湍流影响较大,沉降现象不明显,运移规律呈无序状;粗颗粒(5~10 mm)在管道内停留时间相比微颗粒粉尘,停留时间较短,最长时间为1.71 s,受湍流影响较小,沉降现象明显,运移规律呈波浪状循环上升降落,波峰高度随管程增大而逐渐降低。
[Abstract]:In order to achieve better dust control effect, mine dust treatment needs to select reasonable dust removal methods. At present, mechanical ventilation and dust removal with long ducts is one of the effective measures for mine dust control. As the dust is discharged in the pipeline for a long time, the deposition is bound to occur in the pipeline. The deposition law of silica dust particles with different diameters in horizontal ventilation ducts was simulated by computational fluid dynamics software FLUENT 6.3.26, in which the diameter of ventilation ducts was 500mm, the length of ventilation ducts was 20 mm, and the velocity of air supply was 12 m s ~ (-1). The simulation results show that the residence time of microparticles (100 渭 m) in the pipeline is shorter, the longest time is 3.91 s, the effect of turbulence is greater, the sedimentation phenomenon is not obvious, and the migration law is disordered, and the residence time of coarse particles (510 mm) in the pipeline is higher than that of micro-particle dust. The residence time is short, the longest time is 1.71 s, the effect of turbulence is less, the phenomenon of settlement is obvious, the migration law is wave cycle rising and falling, and the height of wave peak decreases gradually with the increase of pipe length.
【作者单位】： 江西理工大学资源与环境工程学院;江西省矿业工程重点实验室;
【基金】：国家自然科学基金资助项目(50964003)
【分类号】：TD714
本文编号：2259490
[Abstract]:In order to achieve better dust control effect, mine dust treatment needs to select reasonable dust removal methods. At present, mechanical ventilation and dust removal with long ducts is one of the effective measures for mine dust control. As the dust is discharged in the pipeline for a long time, the deposition is bound to occur in the pipeline. The deposition law of silica dust particles with different diameters in horizontal ventilation ducts was simulated by computational fluid dynamics software FLUENT 6.3.26, in which the diameter of ventilation ducts was 500mm, the length of ventilation ducts was 20 mm, and the velocity of air supply was 12 m s ~ (-1). The simulation results show that the residence time of microparticles (100 渭 m) in the pipeline is shorter, the longest time is 3.91 s, the effect of turbulence is greater, the sedimentation phenomenon is not obvious, and the migration law is disordered, and the residence time of coarse particles (510 mm) in the pipeline is higher than that of micro-particle dust. The residence time is short, the longest time is 1.71 s, the effect of turbulence is less, the phenomenon of settlement is obvious, the migration law is wave cycle rising and falling, and the height of wave peak decreases gradually with the increase of pipe length.
【作者单位】： 江西理工大学资源与环境工程学院;江西省矿业工程重点实验室;
【基金】：国家自然科学基金资助项目(50964003)
【分类号】：TD714
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1 叶坚;夏建新;Malczewska Beata;;水平管道水力输送粗粒物料的阻力损失研究[J];金属矿山;2011年07期
，本文编号：2259490
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