Experimental Research On The Performance Of PSA/BAS Spunlaced Filter Material For High Temperature Flue Gas Dusting

With high temperature flue gas, air emissions in the heavy industry are the main target of dust control.The state has gradually been revising the emission limits of various types of industrial boilers and furnaces, of which strict requirements have been conducted to reduce the emission. Bag house filter, as high-efficiency equipment, is more and more used in the industrial dust control area.The core component of bag house is filter material. At present, high temperature resistance filter materials are mainly aramind (PMIA), glass fiber (GLS), polyphenylene sulfide (PPS), polyimide (P84), polytetrafuorcethylene (PTFE) and other high performance fibers. One of which, PSA fiber, with excellent high temperature resistance and thermal dimensional stability, owns the completely independent intellectual property rights, which makes it have better market prospects in the field of high temperature filtration. Another one, Basalt fiber is environmentally friendly high performance fiber, which also has excellent high temperature resistance performance, chemical stability, etc., especially working as high temperature filtration. This research is based on the two high-performance fibers, exploring the use of a new trial spunlace production process to make PSA/BAS layer filter material and studies its performance.High temperature resistance and chemical resistance of basalt yarns were studied. The results suggested that basalt yarns have excellent high temperature resistance and its acid resistance performance is better than alkali’s. Fiber components have less impact on yarns’high temperature resistance and more impact on yarns’chemical stability. However, sizing has a certain impact on the yarns’physical and chemical properties.The factors (spunlace production process, amount of PSA fiber, processing time and temperature) affecting PSA/BAS spunlaced filter materials’high temperature resistance performance were studied. The study showed that the filter material has excellent high temperature mechanical properties and high temperature dimensional stability.Factors affecting the filter performance of filter material were studied. The relativities among pore size distribution, average pore size, porosity and macro filter performance were investigated. The dependences of graded filtration efficiency and dust particle size, dust load and filtration velocity were formulated by orthogonal test and dimensional analysis.They may provide theoretical foundations for practical application in a sense.The factors (post-processing techniques,acid and alkali concentration, treatment temperature) affecting PSA/BAS spunlaced filter material’s corrosion resistance performance were studied. Studies showed that PSA/BAS spunlaced filter material is suitable for use in acidic and high temperature flue gas dusting area. Using post-processing technology can significantly enhance the corrosion resistance, and provides a measure reference to improve the PSA/BAS spunlaced filter material’s corrosion resistance performance.The main innovation of this issue:(a).Presents the PSA/BAS spunlaced filter material and provides a feasibility for recycling after used;(b).Using TGA and infrared spectroscopy to study the filter material’s thermal stability and chemical properties;(c).The microstructure and macroscopic physical properties are formulated.