青龙寺煤矿带式输送机转载点封闭微负压除尘技术研究

Research on Closed Micro Negative Pressure Dust Removal Technology for Transshipment Point of Belt Conveyor in Qinglongsi Coal Mine

为了解决青龙寺煤矿带式输送机转载点粉尘问题,提出了封闭微负压除尘理论。首先对转载点封闭微负压空间模型进行了分析,确定了确保空间内保持微负压状态时排风量与诱导风量和挤占同体积空气量之间的关系;其次对诱导风流的计算开展研究,拟定了诱导风量计算方程,并结合青龙寺煤矿转载点实际数据,开展保持微负压状态时的最小排风量及控尘点保持最低控尘风速时所需排风量计算,经过对比确定了排风量不得小于153 m^(3)/min;最后根据计算结果,现场选取了KCS-180D除尘风机为主要除尘设备的除尘系统,转载点降尘效率达到90%以上,取得了理想效果。

In order to solve the dust problem at the transshipment point of the belt conveyor in Qinglongsi coal mine,a closed micro negative pressure dust removal theory was proposed.Firstly,an analysis was conducted on the closed micro negative pressure space model of the transshipment point,and the relationship between exhaust air volume,induced air volume,and air volume occupied by the same volume was determined to ensure the maintenance of micro negative pressure in the space.Secondly,research was conducted on the calculation of induced air flow,and a calculation method for induced air volume was proposed.Combined with actual data from the transshipment point of Qinglongsi coal mine,the minimum exhaust air volume for maintaining a micro negative pressure state and the required exhaust air volume for maintaining the minimum dust control air speed at the dust control point were calculated.After comparison,the exhaust air volume was determined to be no less than 153 m^(3)/min.Finally,based on the calculation results,the KCS-180D dust removal fan was selected as the main dust removal equipment for the dust removal system on site,and the dust reduction efficiency at the transshipment point reached over 90%,which achieves ideal results.