School of Safety Science and Engineering, Liaoning Technical University, Fuxin, 123000, Liaoning, China.
Key Laboratory of Mine Thermal Power Disasters and Prevention, Ministry of Education (Liaoning Technical University), Fuxin, 123000, Liaoning, China.
Sci Rep. 2022 Mar 30;12(1):5361. doi: 10.1038/s41598-022-09200-1.
To effectively solve the problem of dust pollution caused by the parallel double-belt transportation of coal in a coal preparation plant, taking the Huangyuchuan coal preparation plant as an example, a numerical model of the air flow-dust distribution was established by means of simulation. The flow lines between the strips of tape and the tail of the tape machine will gather, and there will be backflow on the right side of the 3001 tape and left side of the 3002 tape. Under the action of wind current, most of the dust particles larger than 10 μm are distributed in the range of 0-5 m on both sides of the tape; dust particles smaller than 10 μm spread to the entire preparation workshop. Combined with field test verification, dust pollution is mainly concentrated at the guide trough, the feed inlet, the rear of the machine, and the joint of the belt corridor. Based on this, a targeted spray dust reduction treatment plan is proposed. By measuring the dust concentration before and after the treatment of dust-polluted areas, it is proven that the dust reduction efficiency of this plan can reach more than 90%.
为有效解决选煤厂平行双胶带输煤过程中粉尘污染问题，以黄玉川选煤厂为例，通过模拟仿真的手段建立气流-粉尘分布的数值模型。两胶带之间的带条和胶带机尾部的流线会汇聚，在 3001 胶带右侧和 3002 胶带左侧会出现回流。在风流的作用下，粒径大于 10μm 的大部分粉尘颗粒分布在胶带两侧 0-5m 的范围内；粒径小于 10μm 的粉尘颗粒则扩散至整个准备车间。结合现场试验验证，粉尘污染主要集中在导料槽、入料口、机尾和胶带走廊的连接处。在此基础上，提出了有针对性的喷雾降尘处理方案。通过测量粉尘污染区域处理前后的粉尘浓度，证明该方案的降尘效率可达 90%以上。
