摘要
为分析金属矿山多中段高溜井喷头雾化特性及其降尘效果,建立高溜井喷雾降尘实验平台。采用激光粒径分析仪及喷雾实验设备对新型气−水喷头雾化特性、冲击气流对喷雾捕尘能力影响规律进行研究分析。研究结果表明:气、水流量比是影响新型气−水喷头雾化效果的关键因素;当喷头工作时气、水流量比为100~150时,雾化效果最佳,最佳气压和水压区间分别为[0.4,0.6]MPa和[0.3,0.5]MPa,雾滴粒径分布在15~35μm范围内;在最佳气压和水压区间内,雾化角度随气压的增加而增大,随水压先增大后减小,最大雾化角度为40°,调整气压是优化雾化角度的主要手段;溜井卸矿冲击气流对喷雾雾滴粒径影响较大,喷雾捕尘能力与冲击气流速度呈负相关。
In order to analyze the atomization characteristics and dust-reducing effect of high ore pass nozzles in metal mines,a high ore pass spray dust-reducing experimental platform was established.The laser particle size analyzer and spray experiment equipment were used to study the atomization characteristics of the new gas-water nozzle and the influence law of the impact gas flow on the spray dust-collecting ability.The results show that the gas-water flow ratio is the key factor affecting the atomization effect of the new gas-water nozzle.When the ratio of gas and water flow is 100−150,the atomization effect is the best.The best pressure ranges of gas and water are[0.4,0.6]MPa and[0.3,0.5]MPa,respectively.In the above range of gas-water flow ratio,the droplet size distribution is in the range of 15−35μm.The atomization angle increases with the increase of gas pressure in the optimal gas-water flow ratio range.The atomization angle first increases and then decreases with the increase of the water pressure,the maximum atomization angle is 40°,so the adjustment of air pressure is the main means to optimize the atomization angle.The impact gas flow induced by the unloading of the ore pass has a great influence on the particle size of the spray droplets,and the spray dust-collecting ability is negatively correlated with the velocity of the impinging gas flow.
作者
蒋仲安
王亚朋
许峰
JIANG Zhongan;WANG Yapeng;XU Feng(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第1期184-192,共9页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51874016)~~
关键词
气−水喷雾
高溜井
雾滴粒径
降尘
气水流量比
gas-water spray
high ore pass
droplet size
dust reduction
gas-water flow ratio
作者简介
通信作者:王亚朋,博士研究生,从事通风和粉尘控制研究;E-mail:18306422116@163.com。
