钢铁企业除尘用涤纶滤料在复杂烟气环境下的老化行为分析  

Analysis of the Aging Behavior of Polyester Filter Media for Steel Companies in a Composite Environment

作　　者：代峰 柳静献[1] DAI Feng;LIU Jing-xian(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2024年第6期883-889,共7页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(52174215);辽宁省重点研发计划项目(2019JH2/10100004);浙江省重点研发计划项目(2020C03089);沈阳市社会治理科技专项(20-206-4-09);辽宁省揭榜挂帅科技攻关专项(2021JH1/10400023)。

摘　　要：为研究高温烟气中酸碱耦合作用对滤料性能的影响,在3种不同温度(45,75和130℃)下对涤纶滤料进行酸碱交互老化试验.发现涤纶滤料在高温酸碱耦合环境下的耐水解性能较差,且先受到碱再受到酸腐蚀对滤料产生巨大影响.在130℃下,经碱性环境和酸性环境的交互老化后,滤料的拉伸断裂强力和面层剥离强力分别为由1638.8,143.1 N下降到1100.8,19.1 N,FT-IR(Fourier transform infrared spectroscopy)显示,C-O吸收峰减弱,表明水解过程中的聚对苯二甲酸乙二醇大分子链断裂,这也是发生水解和性能下降的主要原因.To study the effect of high‑temperature flue gas on the performance of filter bags,acid‑base interaction aging tests were conducted on polyester filter media at three different temperatures(45,75 and 130℃).The results revealed that polyester filter media exhibited poor resistance to hydrolysis in high temperature acid‑base coupled environments,and when subjected to alkali followed by acid corrosion,the filter media experienced significant degradation.The tensile breaking strength and surface peeling strength of the filter media decreased from 1638.8 and 143.1 to 1100.8 and 19.1 N,respectively,after interactive aging in alkaline and acidic environments at 130℃,FT-IR showed that the C—O absorption peak was weakened,indicating that the macromolecular chain of polyethylene terephthalate was broken during hydrolysis,which was the main reason for the occurrence of hydrolysis and performance degradation.

关 键 词：涤纶针刺毡 钢铁行业废气 高温酸碱交互 机械性能 表面形貌 化学结构 

分 类 号：TS174[轻工技术与工程—纺织材料与纺织品设计]