电气石颗粒/聚苯硫醚针刺毡复合过滤材料的过滤性能
Filtration performance of tourmaline particles/polyphenylene sulfide needle composite filter

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0.3~1 μm粒子过滤效率提高幅度≥13.35%；最优附着浓度为5 mg·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18~38 μm时，对0.3~1 μm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 enhance the industrial filter's filtration efficiency for fine particle, baghouse polyphenylene sulfide(PPS) needle filter as the base material, polyurethane hot melt film as the adhesive layer, tourmaline(TM) particles which have spontaneous polarization characteristic were homogeneous deposited on the material surface by the method of direct precipitation from water solution, TM particles/PPS needle composite filter with different TM purity, contents and particle sizes were prepared by heat treating. SEM was used to investigate the adsorption effect of TM for fine particles, the filter media testing platform was used to evaluate the filtration ability of composite filter. The results show that the filtration efficiency of TM particles/PPS needle composite filter for the submicron particle is improved obviously after adding TM, and the filtration efficiency improves with the increase of TM purity. When the TM purity is 87.16%, the efficiency of the composite filter for 0.3-1 μm particles increases ≥ 13.35%. TM particles/PPS needle composite filter with the optimal concentration of 5 mg·cm-2 has the highest quality factor(QF)which is used to comprehensive assess efficiency and pressure drop. The filtration efficiency increases with the TM size decrease, and the filtration efficiency of TM particles/PPS needle filter for 0.3-1 μm particles enhance ≥ 7.25% when the TM size is 18-38 μm. The filtration performance of TM particles/PPS needle composite filter enhances obviously than the traditional needle filter. 国家十三五重大专项（2016YFC0801704；2016YFC0203701；2016YFC0801605）；十二五科技支撑项目（2015BAK40B00）