胶带运输系统粉尘运动规律及控制技术模拟研究

发布时间：2018-04-30 19:43

本文选题：胶带运输 + 粉尘防治　；参考：《矿业安全与环保》2017年03期

【摘要】：为解决胶带运输系统粉尘逸散问题,获取密闭通风除尘设计的优化参数,以某选煤厂动筛车间为研究背景,依据气—固两相流理论,建立空气、粉尘紊流的离散模型;运用Fluent软件对胶带运输系统中的气流及粉尘运动规律进行模拟,分析研究吸尘罩安装位置及结构参数对粉尘治理效果的影响。研究结果表明,气流及粉尘运动轨迹基本吻合,粉尘轨迹略有滞后;吸尘罩加装位置不受胶带运输速度影响,只取决于气流运动轨迹及粉尘滞后距离;吸尘罩加装在距下料口1.0~1.5 m处,且吸尘罩采用正四棱台形状、棱台锥角控制在60°~70°、棱台高度在0.4~0.6 m、吸风量在8 000~12 000 m~3/h时,除尘系统的除尘效果最佳、工作效率最高。通过现场密闭通风除尘实例,验证了所建模型的科学性及模拟结果的可靠性。
[Abstract]:In order to solve the dust emission problem of belt transportation system and obtain the optimized parameters of dust removal design for airtight ventilation, based on the theory of gas-solid two-phase flow, a discrete model of air and dust turbulence was established based on the background of a coal preparation plant's moving sieve workshop. The air flow and dust movement in belt conveyance system were simulated by Fluent software, and the influence of installation position and structure parameters on dust treatment effect was analyzed and studied. The results show that the air flow and dust trajectory are basically consistent, the dust trajectory is slightly delayed, and the position of dust suction hood is not affected by the speed of belt transport, but only depends on the air flow track and the lag distance of dust. The dust collecting system has the best dust removal effect and the highest working efficiency when the dust suction cover is installed at a distance of 1.0 ~ 1.5 m from the outlet of the lower material, and the shape of the dusting cover is a quadrilateral platform, the cone angle of the ridge is controlled at 60 掳~ 70 掳, the height of the ridge is 0.4 ~ 0.6 m, and the air absorption rate is 8 000 ~ 12 000 m ~ (3 / h). The scientific nature of the model and the reliability of the simulation results are verified by an example of field airtight ventilation and dust removal.
【作者单位】：北京化学工业集团有限责任公司北京市化工职业病防治院;中国矿业大学(北京);
【基金】：国家自然科学基金项目(51274024) 北京市博士后科研经费资助项目(2016zz115)
【分类号】：TD528.1;TD714.4

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