【作者】 张海燕；

【导师】 柳静献；

【作者基本信息】 东北大学 ， 安全技术及工程， 2009， 硕士

【摘要】 袋式除尘器是治理大气污染的高效除尘设备,不仅除尘效率高,而且适用于各种粒径、各种性质的粉尘,在各行业中获得了广泛的应用。滤袋是袋式除尘器的核心部件,其性能是保障袋式除尘器长期稳定运行的重要因素。PPS滤料是目前常用的一种滤料,具有较好的耐热及耐水解等性能,然而在使用过程中会受到烟气中的硫氧化物、氮氧化物等因素的作用降低其使用寿命,造成经济损失,因此延长PPS滤料的使用寿命有极其重要的意义。本文在文献和现有资料的基础上,通过实验手段,系统的研究了PPS滤料在不同温度、不同二氧化氮浓度以及不同时间环境下老化后的断口形貌、断裂过程曲线、断裂强力和断裂伸长率的变化,并对老化后的试样进行了扫描电镜、红外光谱分析。另外,本文还通过实验研究了一氧化氮对PPS滤料的腐蚀作用,将一氧化氮和二氧化氮对PPS滤料的作用进行比较和分析。研究表明二氧化氮对PPS针刺毡滤料具有较强的腐蚀作用,会使滤料机械性能下降,纤维断裂,分子结构发生一定的变化。一氧化氮对PPS滤料的影响较小。此外,本文还在实验的基础上探讨了PPS滤料的老化机理并提出了滤料的防护措施。更多还原

【Abstract】 Bag filters are effective dedusting equipment to control the air pollution. Bag filters are widely used in industry because they are not only high efficiency, but also can control dust of different particle diameters and properties. Filter-bag is the most important part of the bag filters, and it not only costs one thirds of the totle outlay but also needs replaced in periodical. So how to elongate the service life of the Filter-bag is very important.Based on literature survey, anti-corrosion equipment was set up, and the change of fracture, and mechanical characteristic of PPS filter from nitrogen dioxide exposures(different temperature, nitrogen dioxide concentration and hours) were studied in this paper, and the PPS filter samples from nitrogen dioxide exposures were also analysed with the help of Scanning Electron Microscope and Fourier Transform Infrared Spectrometer. In addition, the corrosion of nitric oxide to PPS filter was studied through experimental media to compare with the corrosive effect of nitrogen dioxide In conclusion, nitrogen dioxide had stong corrosive effect on PPS filter leading to the decrease of mechanical properties and fibre damage, yet nitrogen oxide had a smaller corrosive effect on PPS filter.Based on the experimental results of fracture, tensile strength, tensile elongation, morphology and infrared spectrum, the aging reason of PPS filter was explored.更多还原