Research on dust removal characteristics under synergistic action of vibrating wire grid and high-pressure spray

doi:10.16265/j.cnki.issn 1003-3033.2021.06.014

Abstract

Abstract: In order to prevent and control pollution of dust from outlet of mine to surrounding atmospheric environment of mining area,based on theory of fluid dynamics, gas-liquid coupling and spray dust reduction and vibrating wire grid dust removal, computational fluid dynamics (CFD) three-dimensional numerical simulation method was used, dust removal characteristic parameters under synergistic effect of vibrating wire grid and high-pressure spray were optimized, effects of different atomization pressures on particle size distribution and mass concentration distribution of droplets were studied. Effects of diameter and spacing of vibrating string grid on droplets intercepting effect and effects of wind speed on water film of double-layer vibrating string grid were analyzed. The results show that with the increase of atomization pressure, the particle size of droplets decreases gradually and distribution becomes centralized. When atomization pressure exceeds 8 MPa, particle size distribution of droplets does not change significantly. Vibrating-string grids with different spacing have effect of blocking flow field and serious backflow phenomenon, while vibrating-string grids with spacing of 5 mm have the better effect of intercepting droplets with smaller particle size.When inlet wind speed is 3 m/s, water film on the surface of vibrating grating has the best effect, which is more conducive to dust collection. Variation trend of simulated data is basically consistent with experimental results.

Key words: vibrating wire grid, atomization pressure, synergistic action, wet dust removal, numerical simulation

CLC Number:

X964

DING Houcheng, LIAN Zhixu, DENG Quanlong, JIANG Zhongan, YANG Liwei, GE Mengyuan. Research on dust removal characteristics under synergistic action of vibrating wire grid and high-pressure spray[J]. China Safety Science Journal, 2021, 31(6): 106-112.

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