摘要
井下粉尘对人体有严重的危害,对正常生产存在巨大的威胁,而综采工作面的产尘量在各个产尘点所占的比例最高,所以如何提高综采工作面粉尘的降尘率问题受到了极大的关注。
本文在分析产尘点具体问题的基础上,研究了喷雾降尘的机理,提出了决定呼吸尘及全尘降尘效率主要参数,在对各个参数进行分别探讨之后,根据雾化效果参数和系统参数之间关系对参数进行匹配,并对各设计参数的雾化效果进行了模拟;设计、改进了喷雾降尘系统的主要机构——喷嘴;对喷嘴的雾化性能进行研究;也探讨了喷雾降尘系统的两相流作用的问题。
本文对综采工作面喷雾降尘系统的主要参数进行了确定。
研究方法采用了理论与实验相结合的方法。对所设计的喷嘴的几个主要雾流参数(速度、体积)进行了试验测定,对实验结果进行了分析;对风流和雾流两相之间的作用规律进行了试验和数据处理,找出了两者之间作用的函数关系。
经过理论和现场使用表明,综采工作面的喷雾降尘系统设计比较合理,取得了预期的降尘效果,大大提高了呼吸性尘和全尘的降尘率,具有较好的推广价值。
Mining dusts in the well do great harm to human body, it also threaten the normal working system. The dusts in the long face amount the highest in all the dusted places, so the question howr to increase the dust settling efficiency attracts great attention.
Based on the consecrated situation of dusted long faces, the paper do analysis on the spraying dust settling's mechanism. Based on the decided relations among effects and system parameters which decide the efficiency of breathing dusts settling, the paper match the major parameters.
Also, design the main part of -the nozzle, doing research on a special type of nozzle about its spraying features, also think
about other main questions of the system.
The paper sets the main parameters.
The method of theory analysis and test combined is employed in this paper. The tests meters main parameters, and the result was simulated and analyzed. The relation of two-phases was got by tests.
Through the theoretical justify and application on the working spot, the conclusion can be drawn that the system of
spraying dust-settling system in long face are designed reasonably. It can get the anticipated results in improving the efficiency of dust-settling both in breathing dust, but also in the total dusts. It is worth popularization.
引文
[1] 张也影 流体力学(第二版) 北京:高等教育出版社 1987.12
[2] 张远君编译 两相流体动力学 基础理论及工程应用北京航空学院出版社 1980.6
[3] 王炳武 Matlab5.3实用教程 北京中国水利水电出版社 2000.6
[4] 第九次全国水射流技术研讨会学术会议论文集中国劳保协会 1997
[5] 武通海 高效喷雾技术在掘进工作面的应用研究 太原理工大学硕士学位论文 2002.4
[6] 崔谟慎 孙家骏 高压水射流技术 北京 煤炭工业出版社,1993.10
[7] 杨凤翔 陆君良 数值分析 天津 天津大学出版社 1985.3
[8] 龚剑 朱亮 Matlab5.X 理论与提高 北京:清华大学出版社,2000.3
[9] 赵书田.煤旷粉尘防治技术 煤炭工业出版社 1989.12
[10]林明清.通风除尘 太原:化学工业出版社,1982.3
[11]煤矿通风与安全 煤炭工业出版社 1979.6
[12]林建亚 何存兴 液压元件.机械工业出版社,1988,1
[13]王红卫.建模与仿真.北京:科学出版社2002
[14]任锦堂.键图理论及应用 上海:上海交通大学出版社 1995
[15]方丁西.两相流动力学 湖南:国防科技大学出版社 1998
[16]多相流流型信号中的噪声.西安交通大学学报,1999(11)
[17]黄俊 水射流除尘技术 西安:西安交通大学出版社
[18] 逯贵章 高儒 矿山机械 太原:山西科学技术出版社 1991
[19] 张安明 郭科社 高压喷雾降尘的原理及应用煤矿安全 1998(4)
[20] 张祥珍 林南英 引射除尘器中内旋子式喷嘴的结构研究 煤矿机械 (11)
[21] 李德文 粉尘防治技术的最新进展 矿业安全与环保 2000(2)
[22] 张延松 高压喷雾极其在煤矿井下粉尘防止中的应用 重庆环境科学 1994(12)
[23] 王振平 滚筒采煤机防尘技术的实践与认识 煤炭科学与技术 1999(6)
[24] 周明 MTLAB图形技术——绘图及图形用户接口 西安 西北工业大学出版社 1999.11
[25] 罗茂蜀等 喷雾参数对采煤机产尘降尘效果的影响煤炭科学技术1999(2)
[26] Spray-tip droplet SMDs of intermittent high-pressure sprays of diesel fuel compared with coal-water slurry sprays Kihm, K.D.; Terracina, D.P.; Caton, J.A.
[27] Modeling of spray deposition. Measurements of particle size, gas velocity, particle velocity, and spray temperature in gas-atomized sprays Bewlay, B.P.; Cantor; B.
[28] Dust suppression using truck-mounted water spray system Gambatese, John A.; James, David E.
[29] Fault tree analysis of dust suppression mechanism in a spray system with wetting agent Wu, Chao; Gu, De-sheng
[30] Effect of operating parameters of a liquid spray system on coal dust suppression Kim, J.; Tien, J.C.
[31] Suppression of smoke particles using electrostatic spraying Ahmad C.N.; Balachandran, W.
[32] Unique water spray system improves exhaust face ventilation and reduces exposure to respirable dust on continuous miners in laboratory tests Page, Steven J.; Mal, Thomas; Volkwein, Jon C.
[33] Developing and operating a gtoboid shearer drum with ejector water spray Krummenauer, Hans; Lemmes, Frank
[34] Electrostatic dissipation of smoke using evaporating charged water spray Inculet, I.I.; Castle, G.S.P.; Ting, J.
[35] Air entrainment by a bounded hollow cone spray: An application to coal mining Clarke, R.D.C.; Wilkes, I. British Coal Corp Source: Mining Science & Technology
[36] Impact of water sprays on scrubber ventilation effectiveness Volkwein, Jon C.; Wellman, Travis S.
[37] Studies of dust explosion suppression by water sprays and extinguishing powders Gieras, M.; Klemens, R.