高压喷嘴雾化参数的实验研究
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摘要
喷雾降尘中风速对喷嘴雾化性能参数的影响直接影响喷雾降尘效果。为此,开展了风速对喷嘴有效水量及分布均匀度、雾粒粒径的影响试验研究,得出喷雾雾粒粒径与粉尘粒径分布范围接近时降尘效果最佳;随着喷雾压力增大、喷雾射程增加、喷雾流量加大,喷雾覆盖面积略微增加;而随风速增大,喷雾射程和喷雾覆盖面积大大降低;在风流的影响下,喷嘴有效水量为无风流条件下有效水量的80%左右。基于试验研究结果,在夏甸金矿卸载站矿车卸料点采用优选喷嘴喷雾降尘后,总粉尘和呼吸性粉尘浓度降尘效率分别高达91.1%和90%,降尘效果较好。
The influence of wind speed on the atomization performance parameters of the nozzle in spray dust precipitation directly affects the effect of spray dust precipitation.The impact of wind speed on the effective water volume of the spray nozzle and the distribution uniformity and the fog particle size was investigated. The results showed that when the distribution range of fog particle size from the nozzles is close to that of dust particle size,it displays a best effect on dust reduction. With the increase of spray pressure,the spray range increases,the spray flow rate increases,the spray coverage area increases slightly. The spray range and spray coverage area are greatly reduced as the wind speed increases. Under the influence of the wind,the effective water volume of the nozzle is about 80% of that with no wind flow. Based on the experimental results,the dust-reducing efficiencies of total dust and respirable dust reached 91.1% and 90% respectively,after the dust was treated by the preferred nozzle at the unloading station in Xiadian Gold Mine.
The influence of wind speed on the atomization performance parameters of the nozzle in spray dust precipitation directly affects the effect of spray dust precipitation.The impact of wind speed on the effective water volume of the spray nozzle and the distribution uniformity and the fog particle size was investigated. The results showed that when the distribution range of fog particle size from the nozzles is close to that of dust particle size,it displays a best effect on dust reduction. With the increase of spray pressure,the spray range increases,the spray flow rate increases,the spray coverage area increases slightly. The spray range and spray coverage area are greatly reduced as the wind speed increases. Under the influence of the wind,the effective water volume of the nozzle is about 80% of that with no wind flow. Based on the experimental results,the dust-reducing efficiencies of total dust and respirable dust reached 91.1% and 90% respectively,after the dust was treated by the preferred nozzle at the unloading station in Xiadian Gold Mine.
引文
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[14]汤梦,刘荣华,王鹏飞,等.高压喷雾雾化特性及降尘效率实验研究[J].矿业工程研究,2015,30(1):144-145.Tang Meng,Liu Ronghua,Wang Pengfei,et al.Experimental study of high-pressure spray atomization characteristics and dust suppression efficiency[J].Mineral Engineering Research,2015,30(1):144-145.
[15]李勇.破碎站卸料槽喷嘴喷雾降尘技术[J].内蒙古煤炭经济,2017,42(1):95-96.Li Yong.Crushing station discharge trough nozzle spray dust reduction technology[J].Inner Mongolia Coal Economy,2017,42(1):95-96.
[2]王海宾,黄书祥,马有营,等.基于喷嘴雾化参数的采掘工作面喷雾压力优化实验研究[J].煤炭工程,2016,48(12):91-94.Wang Haibin,Huang Shuxiang,Ma Youying,et al.Spray pressure experiment for mining and tunneling face through optimization of nozzle spray parameters[J].Coal Engineering,2016,48(12):91-94.
[3]周刚,程卫民,聂文,等.高压喷雾射流雾化及水雾捕尘机理的拓展理论分析[J].重庆大学学报:自然科学版,2012,35(3):121-126.Zhou Gang,Cheng Weimin,Nie Wen,et al.Extended theoretical analysis of jet and atomization under high-pressure spraying andcollecting dust mechanism of drople[tJ].Journal of Chongqing University:Natural Science Edition,2012,35(3):121-126.
[4]张丽丽.冲击式气流喷雾雾化机理及干燥过程数值模拟的研究[D].济南:山东大学,2008.Zhang Lili.Study on Atomization Mechanism and Numerical Simulation of Drying Process of Air-blast Spray[D].Jinan:Shandong University,2008.
[5]朱良,聂文,周刚,等.煤矿用喷嘴的优选方法研究与应用[J].工业安全与环保,2014,40(9):7-10.Zhu Liang,Nie Wen,Zhou Gang,et al.Research and application of the optimal selection method of nozzle used in coal mine[J].Industrial Safety and Environmental Protection,2014,40(9):7-10.
[6]方立军,李斌.压力式喷嘴雾化性能的试验研究[J].热能动力工程,2010,25(2):202-205.Fang Lijun,Li Bing.Experimental study of the atomization performanceofa pressure type nozzle[J].Journal of Engineering for Thermal Energy and Power,2010,25(2):202-205.
[7]聂文,程卫民,周刚,等.掘进面喷雾雾化粒度受风流扰动影响实验研究[J].中国矿业大学学报,2013,41(3):378-383.Nie Wen,Cheng Weimin,Zhou Gang,et al.Experimental study on atomized particle size as affected by airflow disturbance at the heading face[J].Journal of China University of Mining&Technology,2013,41(3):378-383.
[8]马素平,寇子明.喷雾降尘效率及喷雾参数匹配研究[J].中国安全科学学报,2006,16(5):84-88.Ma Suping,Kou Ziming.Study on efficiency of dust suppression by mist spray and itsmatched parameters[J].China Safety Science Journal,2006,16(5):84-88.
[9]程卫民,周刚,左前明,等.喷嘴喷雾压力与雾化粒度关系的实验研究[J].煤炭学报,2010,35(8):1308-1313.Cheng Weimin,Zhou Gang,Zuo Qianming,et al.Experimental research on the relationship between nozzle spray pressure and atomization particle size[J].Journal of China Coal Society,2010,35(8):1308-1313.
[10]杨家俊,张冰洁,刘定平.螺旋喷嘴雾化特性试验研究[J].环境工程,2013,31(5):71-74.Yang Jiajun,Zhang Bingjie,Liu Dingping.Experimental study on the atomization characteristics of the spiral nozzle[J].Environmental Engineering,2013,31(5):71-74.
[11]陈琴珠,闫东恒,于潇航,等.低压大流量喷嘴雾化性能实验[J].实验室研究与探索,2015,34(12):36-39.Chen Qinzhu,Yan Dongheng,Yu Xiaohang,et al.Experimental study of atomization characteristics for low pressure and high flux nozzle[J].Research and Exploration in Laboratory,2015,34(12):36-39.
[12]汲银凤,陈举师,张波,等.气水喷嘴雾化特性实验研究[J].中国安全生产科学技术,2017,13(12):27-32.Ji Yinfeng,Chen Jushi,Zhang Bo,et al.Experimental research on atomization characteristics of air-water nozzle[J].Journal of Safety Science and Technology,2017,13(12):27-32.
[13]王鹏飞,刘荣华,王海桥,等.煤矿井下气水喷雾雾化特性实验研究[J].煤炭学报,2017,42(5):1213-1220.Wang Pengfei,Liu Ronghua,Wang Haiqiao,et al.Atomization-[]Journal of China Coal Society,2017,42(5):1213-1220.
[14]汤梦,刘荣华,王鹏飞,等.高压喷雾雾化特性及降尘效率实验研究[J].矿业工程研究,2015,30(1):144-145.Tang Meng,Liu Ronghua,Wang Pengfei,et al.Experimental study of high-pressure spray atomization characteristics and dust suppression efficiency[J].Mineral Engineering Research,2015,30(1):144-145.
[15]李勇.破碎站卸料槽喷嘴喷雾降尘技术[J].内蒙古煤炭经济,2017,42(1):95-96.Li Yong.Crushing station discharge trough nozzle spray dust reduction technology[J].Inner Mongolia Coal Economy,2017,42(1):95-96.