Filtration performance of tourmaline particles/polyphenylene sulfide needle composite filter

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(Q_F)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.