ABSTRACT

In order to solve the problems of insufficient filtration performance of bag dust collector in coal mine and improper selection of filter materials, the performance parameters of seven kinds of filter materials were compared and analyzed. The results showed that with the increase of filtration time, the resistance of different filter materials showed an upward trend, the resistance of ordinary filter material increased rapidly, while the resistance of membrane filter material increased more gently. The time required for ordinary filter material to reach the cleaning cycle is relatively short, the cleaning cycle of polyester filter material is 80s, and the amount of dust accumulated on the surface of membrane filter material is always in a rising state. When the dust particle size is between 6.5 μm and 23 μm, the dust removal efficiency of PTFE filter material increases with the increase of filtering wind speed; The field practice shows that after the LFD-45 horizontal film-coated flat bag precipitator with pre-installed PTFE filter material is installed on the tail guide trough of 106belt conveyor, the dust reduction rates of total dust concentration and respirable dust concentration are 98.57% and 98.95% respectively.

摘要

为解决煤矿用布袋除尘器过滤性能不足、滤料选择不当等问题，对7种滤料的性能参数进行了对比分析。结果表明，随着过滤时间的增加，不同滤料的阻力均呈上升趋势，普通滤料阻力增加较快，而膜滤料阻力增加较为平缓。普通滤材达到清灰周期所需时间较短，聚酯滤材的清灰周期为80s，膜滤材表面积尘量始终处于上升状态。当粉尘粒径在 6.5 μm 和 23 μm 之间时，PTFE滤料的除尘效率随过滤风速的增加而增加；现场实践表明，LFD-45卧式预装聚四氟乙烯滤料的覆膜扁袋除尘器安装在106带式输送机尾部导料槽后，总​​粉尘浓度和可吸入粉尘浓度降尘率为98.57%和 98.95%。