| 引用本文: | 蒋仲安,王明,陈举师,林梦露.气水喷嘴雾化特征与降尘效果分析[J].哈尔滨工业大学学报,2017,49(2):151.DOI:10.11918/j.issn.0367-6234.2017.02.024 |
| JIANG Zhong’an,WANG Ming,CHEN Jushi,LIN Menglu.Atomization characteristics and dust suppression mechanism of a gas-water nozzle[J].Journal of Harbin Institute of Technology,2017,49(2):151.DOI:10.11918/j.issn.0367-6234.2017.02.024 |
|
| 摘要: |
| 为提高气水喷嘴在煤矿井下高浓度粉尘作业场所的喷雾降尘效率，通过实验研究了气水喷嘴的雾化特性参数，得出了雾滴平均直径与气、水流量的变化规律；以煤矿综掘工作面气水喷雾降尘过程为研究对象，建立了相应的数学模型，推导出了气水喷嘴降尘效率的关系式，采用Matlab软件绘制了降尘效率曲线.研究表明：水流量一定时，气体流量越大降尘效率越大；气体流量一定时，降尘效率随水流量的增大先增大后减小；粉尘粒径越大，喷雾雾滴有效作用距离越长，粉尘越容易被沉降；要使气水喷嘴的降尘效率达到80%以上，气体流量必须大于150×10-5 m3/s，最佳的气水流量比范围为100~150.依据工作面粉尘的粒径分布和降尘效率要求，参照相关曲线选择最佳的气水流量，可以达到更好的降尘效果和经济效益.
|
| 关键词: 综掘面 粉尘 气水喷嘴 喷雾 降尘效率 气水流量比 |
| DOI：10.11918/j.issn.0367-6234.2017.02.024 |
| 分类号:TD714.2 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(4,6)；中国博士后科学基金(2014M560891);北京市自然科学基金青年科学基金(8164060) |
|
| Atomization characteristics and dust suppression mechanism of a gas-water nozzle |
|
JIANG Zhong’an, WANG Ming, CHEN Jushi, LIN Menglu
|
|
(Key Laboratory of Ministry of Education for High Efficiency Exploitation and Safety of Metal Mine （University of Science and Technology Beijing）, Beijing 100083, China)
|
| Abstract: |
| In order to improve the spray dust efficiency of a gas-water nozzle in the coal mine workplaces with high concentration of dust, the gas-water nozzle atomization characteristic parameters were studied through experiments, and the changing rule between the droplet average diameter and the gas/water flow was obtained; this paper studied the dust removal process of the gas-water spraying in the comprehensive tunneling face. The corresponding mathematical model was established and the expression of the gas-water nozzle's efficiency was provided. The curve of dust removal efficiency was drawn by use of Matlab. Research results show that: when the water flow remains constant, the dust removal efficiency increases with the increase of the gas flow; when the gas flow remains constant, the dust removal efficiency increases firstly and then decreases with the increase of the water flow; the larger the dust size is and the longer the effective distance of spray droplets is, the easier the dust settling is. Only when the gas flow is greater than 150×10-5 m3/s, the dust reducing efficiency can reach 80%, and the best gas water flow ratio lies between 100 and 150. Based on the size distribution and removal requirement of dust in working face, choose the best gas/water flow can be chosen by reference to the related curve so that better dust removal effect and economic benefits can be achieved.
|
| Key words: comprehensive tuneling face dust gas-water nozzle spray dust removal efficiency gas/water flow ratio |
