聚丙烯靜電集塵板集塵效率和再生性研究
[Abstract]:With the rapid development of society and economy, people's requirements for living standards and indoor air quality are gradually increasing. Air pollution is one of the most serious environmental pollution problems nowadays, especially PM2.5 is considered to be a major threat to human health. The traditional electrostatic dust collecting plate is mainly made of multi-layer metal sheets with holes, but it is easy to produce leakage of electricity at a high cost and is gradually replaced by electret material. Polypropylene (PP) has become the main electret substrate for electrostatic dust collectors because of its light weight, regular structure, strong bending resistance and excellent thermal stability. Polyaniline (PANI) is a conductive polymer material. The electret is prepared by in-situ polymerization of aniline to form polyaniline in the conductive material area of dust collecting plate. A kind of polyaniline/polypropylene electrostatic dust collecting plate with good dust collecting efficiency and washing resistance is obtained, which overcomes the washing resistance of traditional methods effectively. The main contents and conclusions are as follows: (1) Polyaniline was synthesized on the surface of polypropylene by in-situ polymerization of aniline. The polymerization process of polyaniline was studied. The factors such as pretreatment time, concentration of aniline (An), concentration of hydrochloric acid (HCl), molar ratio of ammonium persulfate (APS) to Ans and reaction temperature were discussed. The conductivity of polyaniline has a direct impact on the collection efficiency of polyaniline/polypropylene electrostatic precipitator, so the technological parameters of polyaniline with different surface resistance have been explored. The basic structure and properties of propylene were characterized. The results showed that polyaniline was successfully polymerized on the surface of polypropylene and the thermal stability of the substrate was unaffected. The stainless steel strip is connected and assembled to form an electrostatic dust collecting plate which meets the requirements of dust collecting test. The electrostatic dust collecting plate is fixed on the self-assembled quasi-electrostatic air dust collecting test equipment. The dust collecting efficiency of the particle is obtained by calculating the change of the particle concentration at the inlet and outlet of the dust collecting test equipment combined with the laser haze detector. The effects of conditions, wind speed, particle size, surface square resistance of polyaniline/polypropylene material and space between dust collecting plates on dust collecting efficiency were studied. Maximum dust collection efficiency: 95% for PM10, 91% for PM2.5, 87% for PM1.0. (4) The results of routine physical properties test of PANI / PP electrostatic dust collection board show that the maximum binding fastness of PANI / PP can reach 5 grades, and polyaniline is not easy to peel off and fall off. The dust collecting board also has good washing resistance. The maximum dust collecting efficiency of PM2.5 after 5 washes is still 75%. The maximum dust collecting efficiency of PM2.5 after 10 washes is still 63%. It has good durability and practicability.
【學(xué)位授予單位】:東華大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TU834.8;TQ325.14
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