玄武岩基/玄武岩+轶纶复合针刺滤材的开发研究

Study on the Development of Basalt Fiber Fabric/Basalt Fiber & Yilun Fiber Composite Needling Filter Material

滤料满足在较高温度工况条件下使用,能实现更好的节能环保。而能在300℃及以上高温工况条件下使用,是现有袋式除尘滤料的技术瓶颈。本文以玄武岩长丝格子布为基布,玄武岩短纤和轶纶(聚酰亚胺)短切纤维按一定比例共混纤维为滤料短纤原材,通过针刺加固工艺及浸渍定型后处理,开发出新型超耐高温复合滤材。滤料经300℃高温处理后,剥离强度、迎面层拉伸强度保持率达95%左右,尺寸稳定,具备在300℃高温条件下长期使用的要求。同时滤料具备较好的透气性、对粒径7μm及以上的微颗粒物的过滤效率达95%及以上、容尘率接近100%。

Better energy saving and environmental protection can be achieved if filter material is used in the higher temperature conditions.Its use in 300 ℃ or above is the technical bottleneck of the existing bag-type dedusting filter material.In this paper,the basalt fibers lattice cloth was used as the filter substrate,and the chopped basalt fiber and short cut fiber Yilun（polyimide）were mixed in a certain proportion as the filter raw fiber.After needling strengthening technology and dipping,a new type of ultra-high temperature resistant composite filter material was developed.The peeling strength and tensile strength retention rate of the face layer was about 95%,and the size remains stable after the heat treatment at300 ℃.The filter material can be long-term used at the high temperature of 300 ℃.At the same time,the filter material had good air permeability.Its filtration efficiency for micro particles with the diameter of 7μm was over 95%and the dust content rate was nearly 100%.