Application Of Multi-Ionic Dust Collector Compounding Method And Fine Particle Spraying Device

Coal mine safety situation is still grim in China,coal dust explosion accidents occur,the incidence of miners'pneumoconiosis is increasing year by year,and the multi-ion fine atomized particle dust removal technology is selected for research.For the coal seams in Lu'an mining area,the original moisture content is low,the coal dust has poor hydrophilic ability,the spray sprinkling water removal rate is low,the coal seam is dry after the extraction,and the current situation of crushing and dust generation is large.Through the on-site extraction of coal samples,the dust production characteristics and dust particle distribution rules of the excavation process of Chang-cun Coal Mine were tested and analyzed.The coal dust generated by the crushing of the Chang-cun coal mine roadway was less than 50?m,accounting for92.5%of the total dust,and the particle size diameter was larger than 50?m.Dust is quite small,while respirable dust accounts for 26%of total dust.A variety of surfactant isotope ion combination and heterogeneous ion cross-combination methods were proposed.Neutral inorganic salts were added to the compounded wetting agent solution to enhance the ionization characteristics of the solution.The curing reinforcing agent was added to prolong the suspension of the atomized particles.Life expectancy,increase the probability of capturing dust;add adhesion agent to improve the capture efficiency of small particle size dust and respiratory dust;add ionic liquid as additive to improve the dust collection characteristics of compound multi-ionic solution.The surface tension and contact angle of the compounded 9-component multi-ionic dust remover were tested,and two kinds of compound dust removers with high cost performance were obtained.A multi-ion ion water atomization particle generation system was developed.The pressure,water pressure,flow rate,nozzle opening equivalent diameter and shape were studied,and an ideal P-V-D_s adjustment model was established.Field test to determine the P-V-D_s adjustment method,under the conditions of reasonable gas and water consumption to produce 70-100?m particle size of atomized particles accounted for more than 80%.A secondary atomization method was proposed,and a secondary atomizing nozzle including a nozzle tube and an ejector cover was developed.The ejector cover was installed at the front end of the nozzle tube,and an atomization tube was arranged inside the nozzle tube,and the atomization tube was divided into a reaming mist.The section,the middle hole pressurizing section,the shrinkage hole regulating section,and the dust removing agent mixing section.The multi-ion ion dedusting agent and the fine atomized particle spraying device for mining were carried out in the comprehensive excavation working face of the contact roadway of the 520 West Wing Xiangfeng Lane of Chang-cun Mine.It is verified that the multi-ion compounding can improve the dust removal effect of the humectant.The dust-removing effect of the circular core nozzle is better than that of the elliptical nozzle.The optimized ionized fine mist particle dust removal system has a dust removal efficiency of 85%and respiratoryity.The dust removal efficiency of dust reaches 80%.The dust removal efficiency has been greatly improved,the working environment of the underground workers has been effectively purified,and a good comprehensive dust removal effect has been achieved.