转运站袋式-微雾联合控尘方案数值分析
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摘要
为解决选煤厂转运站处粉尘污染严重的问题,采取袋式-微雾联合控尘方案.以平朔木瓜界选煤厂280转运站为例,应用气-液-固多相流理论,通过数值模拟的手段,对转运站粉尘逸散规律和微雾袋式联合控尘方案进行分析.研究结果表明:转运站导料槽喷尘是落料诱导风流造成的,消除诱导风流是选择除尘器的依据;机尾裸露皮带甩尘是黏附在皮带上的粉尘与风流的摩擦造成的,控制喷雾量是机尾微雾控尘的关键.将确定参数应用于现场,转运站降尘率高达95%以上.
In order to solve the problem of serious dust pollution in transfer station of coal preparation plant, micro fog and bag combined dust control scheme was adopted. Based on the 280 transfer station in Pingshuo Mu Gua-jie coal preparation plant, the gas-liquid-solid multiphase flow theory was applied, and by means of numerical simulation, dust diffusion rules of transfer station and bag-micro fog combined dust control scheme were analyzed. The results show that the spraying dust of guide chute in transfer station is caused by the blanking induced wind flow, and eliminating the induced wind flow is the basis to choose a dust collector; and the jilting dust of bare belt in the tail is caused by the friction between the dust adhering to the belt and wind flow. Controlling the spray quantity is the key to micro fog dust control of the tail. When the certain parameters was applied in the field, the dust removing efficiency exceeded 95%.
In order to solve the problem of serious dust pollution in transfer station of coal preparation plant, micro fog and bag combined dust control scheme was adopted. Based on the 280 transfer station in Pingshuo Mu Gua-jie coal preparation plant, the gas-liquid-solid multiphase flow theory was applied, and by means of numerical simulation, dust diffusion rules of transfer station and bag-micro fog combined dust control scheme were analyzed. The results show that the spraying dust of guide chute in transfer station is caused by the blanking induced wind flow, and eliminating the induced wind flow is the basis to choose a dust collector; and the jilting dust of bare belt in the tail is caused by the friction between the dust adhering to the belt and wind flow. Controlling the spray quantity is the key to micro fog dust control of the tail. When the certain parameters was applied in the field, the dust removing efficiency exceeded 95%.
引文
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[2]陈曦,葛少成,张忠温.基于Fluent多喷嘴喷雾干涉数值模拟分析[J].环境工程学报,2014,8(6):2 503-2 508.CHEN Xi.,GE Shaocheng,ZHANG Zhongwen.Numerical simulation and analysis of multi-ozzle interference base on Fluent[J].Chinese Journal of Environmental Engineering,2014,8(6):2 503-2 508.
[3]关键.木瓜界选煤厂袋式除尘系统技术参数的优化选择[D].阜新:辽宁工程技术大学,2010.
[4]荆德吉,葛少成,刘剑.破碎站粉尘逸散规律及降尘技术的数值模拟及其应用[J].环境工程学报,2013,7(9):3 494-3 500.JING Deji,GE Shaocheng,LIU Jian.Numerical simulation of dust diffusion rule and suppression technology in crushing station and application[J].Chinese Journal of Environmental Engineering,2013,7(9):3 494-3 500.
[5]杨胜来.综采工作面粉尘运移和粉尘浓度三维分布的数值模拟研究[J].中国安全科学学报,2001,4(11):61-64.YANG Shenglai.Numerical simulation of 3-Dimensional dust distribution on long wall coal faces[J].China Safety Science Journal,2001,4(11):61-64.
[6]贾惠艳.皮带输煤系统转载点粉尘析出逸散规律及数值模拟研究[D].阜新:辽宁工程技术大学,2007.
[7]荆德吉.选煤厂给料机和落料管产尘机理及控制技术[D].阜新:辽宁工程技术大学研究生院,2010.
[8]金龙哲.矿井粉尘防治理论[M].北京:科技出版社,2010.
[9]葛少成,葛斐,张忠温.受料点密封负压袋式除尘机理分析[J].辽宁工程技术大学学报(自然科学版),2015,34(3):344-347.doi:10.11956/j.issn.1008-0562.2015.03.012.GE Shaocheng,GE Fei,ZHANG Zhongwen.Analysis of sealed negativepressure bag-type dust removing mechanism at a material-receiving point[J].Journal of Liaoning Technical University(Natural Science),2015,34(3):344-347.doi:10.11956/j.issn.1008-0562.2015.03.012.
[10]葛少成,荆德吉,黄莹品.基于数值模拟的高压微雾除尘原理及其技术参数确定[J].辽宁工程技术大学学报(自然科学版),2012,31(1):17-20.GE Shaocheng,JING Deji,HUANG Yingpin.Numerical simulation determination of the production mechanism and technical parameters of high-pressure micro-fog system[J].Journal of Technical University(Natural Science),2012,31(1):17-20.