摘要
为了得到适用于煤矿降尘的泡沫喷头最优结构参数,在阐述泡沫喷头设计原理的基础上,定义了泡沫的压缩系数,导出了泡沫体积与压力之间的函数关系式。由关系式可知,泡沫的体积在输送管道的出口处会发生膨胀,在管道出口的两侧对称设置豁口,泡沫将会沿着豁口方向发生对称膨胀而呈扇形扩散。根据此原理,设计了泡沫喷头的内部结构,理论上计算出了泡沫喷头的关键结构参数。在实验室构建了实验系统,对泡沫喷头的结构参数进行了一系列的优化实验,最终确定了最佳尺寸,并对加工出来的喷头进行了模拟喷洒实验与实际应用。结果表明该喷头具有流量大、喷射距离远、分散均匀、扩散范围广的特点,且其喷出的泡沫能够有效地覆盖产尘点,降尘效率高,能够满足煤矿井下采掘工作面降尘的需要。
In order to obtain the optimal key structure parameters of foam nozzle applied to dust control underground coal mine,the design principle of foam nozzle was elaborated. Meanwhile the compressibility of foam was defined and the calculation formula about volume change of foam caused by pressure variation was deduced. From the formula,the volume expansion would occur when the foam flows out the pipeline,if the two gaps were set at the pipeline end symmetrically,the fan-shaped diffusion would appear along the gaps because of the volume expansion. Based on these principles,the internal structure of the nozzle was designed and the key structure parameters were theoretically calculated. By using the experimental system constructed in the lab,a series of optimized experiments were carried out,and the optimum sizes of the key structure parameters were obtained. The foam nozzle with optimum structure parameters was produced,and the simulation spraying experiments and the practical application were carried out using the produced foam nozzle. The results of experiments and application show that the foam nozzle has the advantages,such as large flow quantity,far jetting distance,uniform dispersion and wide diffusion range. Furthermore,the foam spraying from the foam nozzle can effectively cover the dust sources,which will have a remarkable effect on dust control at working face underground coal mines.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2014年第6期1102-1106,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目(51104153)
中央高校基本科研业务费专项资金资助项目(2011QNB11)
关键词
降尘
泡沫
喷头
粉尘
dust control
foam
nozzle
dust
作者简介
任万兴（1980-），男，河南封丘人，副教授。E-mail：rwxcom@153．com
