纤维滤袋孔径特征对过滤性能的影响  

Effect of Pore Characteristics on Filtration Performance of Filter Bag

作　　者：柳静献[1] 李亚霏 吕超 赵翰鹏 LIU Jing-xian;LI Ya-fei;LYU Chao;ZHAO Han-peng(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China;Standards&Metrology Research Institute China Academy of Railway Sciences Co.,Ltd.,Beijing 100081,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]中国铁道科学研究院集团有限公司标准计量研究所,北京100081

出　　处：《东北大学学报(自然科学版)》2024年第11期1629-1637,共9页Journal of Northeastern University(Natural Science)

基　　金：国家“十四五”重点研发计划项目(2022YFC2503201);国家自然科学基金资助项目(52174215);辽宁省兴辽人才计划(XLYC2002091);辽宁省揭榜挂帅科技攻关专项(2021JH1/10400023);浙江省重点研发计划项目(2020C03089);工信部绿色制造项目(2018LSLN001)。

摘　　要：为探究袋式除尘滤料孔径特征及其对过滤性能的影响,分别选用针刺毡、水刺毡和覆膜类纤维滤袋共13种样品,采用泡点法对其最大孔径及平均孔径进行测试,利用场发射分析扫描电镜-Image-pro plus6.0计算机图像软件联用分析针刺毡和水刺毡类纤维滤袋的孔径分布.结果表明:针刺毡最大孔径及平均孔径均大于水刺毡,覆膜类滤料的最大孔径及平均孔径最小;内部孔喉最大孔径及平均孔径会影响到透气度、过滤效率和过滤阻力的大小,随着孔径的增大,透气度逐渐增加;孔径越小则过滤效率越大.此外,水刺毡滤料的表观孔径分布较针刺毡滤料更加集中,分布更加均匀,这对提高滤料的过滤效率有一定程度的影响.To study the effect of pore characteristics on filtration performance of filter bag,the maximum pore size and mean pore size of thirteen kinds of samples are determined by bubble‑point method,mainly including needled filter bag,spunlace filter bag and membrane covered filter bag.In addition,the pore distribution characteristics of needled filter bag and spunlace filter bag are also analyzed by a combination of scanning electron microscope and Image-pro plus 6.0.The results show that the maximum pore size and mean pore size of needled filter bag are larger than those of the spunlace filter bag,and the pore size of the membrane covered filter bag is the lowest one.The maximum pore size and mean pore size of the internal pore throat have an effect on the air permeability,filtration efficiency and pressure drop of filter bags.Air permeability increases with the increase of pore size.The filtration efficiency increases with the decrease of pore size.Additionally,the pore distribution of spunlace filter bag is more concentrated and uniform than other kinds of filter bags,which has a certain degree of influence on the improvement of filtration efficiency of filter materials.

关 键 词：纤维滤袋 孔径分布 透气度 分级计数效率 过滤阻力 

分 类 号：TS174[轻工技术与工程—纺织材料与纺织品设计]