摘要
为有效降低矿井工作场所粉尘浓度,提高雾化水源利用率,基于对雾化捕尘机理的分析,在自建试验系统内,以1.7 MHz超声波作为雾化动力源,将蒸馏水雾化为超细水雾,对双鸭山某矿三分之一焦煤煤样进行了雾化降尘试验。在分别完成1 min、2 min和5 min的雾化作用后,立即测量试验系统内的粉尘质量浓度,每5 min测量1次。绘制和分析各组试验数据所对应的回归方程,并以试验系统内无雾化煤尘自沉降试验数据作为对比。结果表明:超声波雾化作用能加速煤尘沉降,对降低试验系统内的残余粉尘浓度作用明显;雾化时间为1min、2 min和5 min时初次采样点的雾化降尘率分别为10.11%、12.73%和30.95%;粉尘沉降速率随时间延长而降低,但粉尘不能完全沉降;雾化时间与试验系统内的残余粉尘质量浓度负相关,雾化作用5 min的残余质量浓度最低为自沉降残余质量浓度的30.6%。
The article is intended to introduce the results of its study on the new approach to the coal-dust suppression with the ultrasonic atomized water in hoping to reduce the coal dust emission effectively and increasing the utilization rate of the atomized water in the coal mining workface. To achieve the purpose, we have investigated the principles for automatic dust settling and suppression via the analysis of its mechanism and the technical problems likely to be involved. And, then, we have taken the 1.7 MHz ultrasonic as the chief power source for the ultrasonic at- omization so as to atomize the distilled water and transforming it into the ultra-fine water mist. It is also for the aforementioned purpose, we have worked out our own experimental system and conducted the dust suppression experiment with the one-third coke coal in a mine of Shuangyashan mining group. According to the situation of the mining actuality, the coal dust concentration in the experimental system has to be tested and measured every 1 minute, 2 minutes and 5 minutes later while the system is under working. And, furthermore, a time-dust concentration curve has been drawn via the experimental data and the average data of the said experiment. ＇What is more, we have als0 studied the regression equation of the time-dust concentration curve, proving it in accord with the average data by using the regression analysis module of the statistical product and the service solutions （SPSS） to make a comparison with the experimental data gained from the experiment with no atomized system. The experimental results have thus shown that the ultra-fine water mist atomized by 1.7 MHz ultrasonic can help speed up the coal-dust suppression significantly and reduce the residual dust concentration of the self-built experimental system efficiently. The actually calculated de-dusting effi- ciency of the first sampling in each atomization experiment accounts for 10.11%, 12. 73% and 30. 95% in 1, 2 and 5 mi- nutes, respectively. What is more, the dust suppression
作者
孙建华
李珺
曲征
魏春荣
张锦鹏
SUN Jian-huaI LI Jun QU Zheng WEI Chun-rong ZHANG Jin-peng(Department of Mining Engineering, Heilongjiang University of Science ＆ Technology, Harbin 150022, China Department of Safety Engineering, Heilongjiang University of Science ＆ Technology, Harbin 150022, China)
出处
《安全与环境学报》
CAS
CSCD
北大核心
2016年第6期84-88,共5页
Journal of Safety and Environment
基金
国家自然科学基金青年科学基金项目(51504086)
关键词
安全工程
超声波
雾化
煤尘
试验研究
safety engineering
ultrasonic
atomization
coaldust
experimental study
