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为提高工业用过滤材料对细颗粒物的捕集效率,以袋式除尘用聚苯硫醚(PPS)针刺毡为基材,聚氨酯热熔胶膜为黏合层,通过溶液沉淀法将具有自发极化特性的电气石(TM)颗粒覆于基材表面,经热压处理制备了含不同纯度、不同含量、不同颗粒粒度的TM颗粒/PPS针刺毡复合过滤材料;利用SEM研究了TM对微细粒子的吸附情况,利用滤料性能测试装置研究了TM颗粒/PPS针刺毡的过滤性能,结果表明:附着TM颗粒后,TM颗粒/PPS针刺毡对亚微米粉尘过滤效率明显提高,TM纯度越高效果越好,纯度为87.16%时,滤料对0.3~1μm粒子过滤效率提高幅度≥13.35%;最优附着浓度5mg·cm~(-2)时,用于综合评价滤料过滤效率与阻力的滤料品质因数QF值最高;TM颗粒粒径越小,过滤效率提升效果越明显,TM颗粒粒径18~38μm时,对0.3~1μm粒子过滤效率提高幅度≥7.25%。TM颗粒/PPS针刺毡复合滤料较传统针刺毡滤料过滤性能明显增强。
In order to improve the trapping efficiency of industrial filter material on fine particles, polyphenylene sulfide (PPS) needle felt for bagging was used as substrate, polyurethane hot melt adhesive film was adhesive layer, (TM) particles were coated on the surface of the substrate. TM particles / PPS needle-felt composite filter materials with different purity, different contents and different particle sizes were prepared by autoclaving. The results showed that TM particles / PPS needle felt significantly improved the filtration efficiency of submicron dust after attaching TM particles, while TM purity The higher the effect is, the higher the filtration efficiency is, the higher the filtration efficiency is, the higher the filtration efficiency is to 13.35% for the 0.3 ~ 1μm particles and the optimal attachment concentration is 5mg · cm ~ (-2) The QF value of filter media with the highest resistance was the highest. The smaller the particle size of TM was, the more obvious the filtration efficiency was. When TM particle size was 18 ~ 38μm, the filtration efficiency of 0.3 ~ 1μm particles was increased by ≥7.25%. TM particles / PPS needle felt composite filter media than traditional needle felt filter performance was significantly enhanced.