Abstract: In view of the serious dust pollution in the underground crushing chamber,the conventional wet dust collector is difficult to effectively remove fine particles. On the basis of integrating the advantages of various wet dust collectors,a wet composite dust removal device embedded with adjustable Venn tube and fiber grid is designed,and an experimental platform is established. Experimental study on the embedded adjustable venturi tube,fiber grating wet composite effect of dust removal device for fine particles of dust catcher,by changing the angle of spread of venturi tube,fiber grating structure parameters,the single factor and multi-factor orthogonal experiment,determine the embedded adjustable venturi-fiber grating wet the best parameters of compound dust removal device. The experimental results show that when the wind speed of venture-tube is 22. 7~ 33. 6 m / s,the diffusion angle of venture-tube is 5° ~ 6°. When the diameter of fiber grid is 0. 3 mm,the spacing of fiberboard is 3~ 5 cm,the number of fiberboard layers is 2~ 4,and the liquid-gas ratio is 0. 3 ~ 0. 6 L / m3,the removal efficiency of fine dust reaches 99%. Compared with single embedded adjustable Venturi and wet dense fiber grid,the removal efficiency of fine dust with particle size less than 3 μm is 5. 4% and 6. 6% higher respectively,and the removal effect of fine dust is better.

Key words: wet composite dust collector,embedded adjustable Venturi,wet fiber grid,filtration performance,purification resistance