摘要
为确定风流扰动综采工作面液压支架架间高压喷雾降尘雾滴粒度变化规律,选用3种喷嘴,基于自主设计的高压喷雾雾滴粒度测量系统进行了模拟实验,并进行了风流扰动架间高压喷雾雾滴降尘应用试验.结果表明:速度为1.2m/s的风流扰动后,雾滴场的雾滴粒径平均值有所增大,迎风侧雾滴粒径小于背风侧;随着喷嘴迎风安设角度α增大,雾滴场的整体雾滴粒度先减小后增大,α=10°时最小,3种喷嘴中喷嘴Ⅰ在8MPa喷雾压力时的雾滴粒度最小;风流扰动后,随着α增大,各测点粉尘质量浓度、全尘与呼尘降尘率平均值的差值均先减小后增大,降尘率平均值反之,α=10°时降尘效果最佳,全尘、呼尘的降尘率平均值分别为80.11%,78.04%,结合实验结果,确定最优α为10°.
To determine the change rules on the size of airflow disturbing dust removal droplet produced by high-pressure spray between hydraulic supports in fully mechanized coal face, three kinds of nozzles were selected in the experiment. Based on the self-designed high-pressure spray droplet size measuring system, the simulation experiment was carried out. The dust removal application experiment on the airflow disturbing droplet produced by high-pressure spray between supports was also conducted. The results show that after the 1.2 m/s airflow disturbance, the average droplet size in spray field increases and the droplet size on windward side is larger than leeward side. In addition, with the increase of nozzle＇s layout angle a on windward side, the whole droplet size in spray field first decreases and then increases. When a is 10°, the droplet size reaches the minimum. The droplet size of nozzle I is the minimum among three kinds of nozzles when the spray pressure is 8 MPa. The dust concentration at each measuring point and the difference value of dust-settling average rate between whole dust and respirable dust first decrease and then increase, while the dust-settling average rate is the opposite. When a increases to 10° the dust-settling effect is the best, and the average dust-settling rate of whole dust and respirable dust increase to 80.11% and 78.04% respectively. According to the experimental results, the optimal value for a is 10°.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2016年第4期670-676,共7页
Journal of China University of Mining & Technology
基金
国家自然科学基金煤炭联合基金重点项目(U1261205)
国家自然科学基金青年基金项目(51404147)
中国博士后科学基金项目(2015M570601)
矿山灾害预防控制省部共建国家重点实验室培育基地开放课题基金项目(MDPC2013ZR04)
关键词
风流
综采工作面
液压支架
架间高压喷雾
雾滴粒度
airflow
fully mechanized coal face
hydraulic support
high-pressure spraying between supports
droplet size
