矿井水钠钾离子浓度对喷雾雾化特性影响研究

Study on the Influence of of Sodium and Potassium lons Concentrations in Mine Water on the Spray Atomization Characteristics

优化喷雾雾化特性是提高矿井喷雾降尘效率的有效方法。为研究矿井水Na^(+)、K^(+)离子浓度对其雾化特性的影响,提高矿井粉尘治理效果,采用表面张力测量仪和激光粒度测试系统表征不同矿井水的表面张力和雾化特性,分析矿井水中Na^(+)、K^(+)离子浓度引起的表面张力差异及其对雾化特性的影响。结果表明:低离子浓度条件下,矿井水表面张力与其Na^(+)、K^(+)离子浓度呈正相关。在相同喷雾压力下,雾滴粒径与表面张力成正相关,降低矿井水表面张力可提高降尘效率;表面张力减小可延长雾化区分布范围,延长粉尘捕集范围,增加粉尘沉降数量;雾场中各雾滴粒径随表面张力减小而逐渐呈现均一性分布,这有利于提升雾滴对粉尘的润湿能力。研究结果对优化喷雾雾化特性,提高喷雾降尘效率,促进矿井水资源治理具有重要意义。

Optimizing atomization characteristics is an effective method to improve dust reduction efficiency in mine.In order to study the influence of Na^(+) and K^(+)concentrations in mine water on its atomization characteristics and improve the effectiveness of mine dust control,surface tension measuring instruments and laser particle size testing systems were used to characterize the surface tension and atomization characteristics of different mine water.The differences in surface tension caused by Na+and K+concentrations in mine water and their impacts on atomization characteristics were analyzed.The results indicate that under low ion concentration conditions,the surface tension of mine water is positively correlated with its Na^(+) and K^(+) concentrations.Under the same spray pressure,the droplet size is positively related to the surface tension,and reducing the surface tension of mine water can improve the dust reduction efficiency.Reducing surface tension can extend the distribution range of the atomization zone,extend the dust collection range,and increase the amount of dust deposition.Each droplet size in the fog field gradually exhibits a uniform distribution as the surface tension decreases,which is beneficial for improving the wetting ability of the droplets on dust.The research results are of great significance to optimize the atomization characteristics of spray,improve the dust reduction efficiency of spray,and promote the treatment of mine water resources.