掺杂Al_2O_3纳米中空纤维膜的油气渗透特性研究  

Dissolved Gas Permeation Characteristics Research Based on Hollow Fiber Membrane Doped with Nano-Oxide Al_2O_3

作　　者：陈伟根[1] 时晶[1,2] 徐海霞[3] 万福[1] 赵立志[1] 谢波[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]国网浙江省电力公司绍兴供电公司,绍兴312000 [3]国网重庆市电力公司,重庆400015

出　　处：《电工技术学报》2015年第6期240-246,共7页Transactions of China Electrotechnical Society

基　　金：国家重大科学仪器设备开发专项(2012YQ160007);国家重点基础研究发展计划项目(973计划)(2012CB215205)资助项目

摘　　要：实时在线监测运行变压器油中溶解气体类别及含量的变化对确保变压器安全运行具有重要作用。油气分离技术是变压器油中溶解气体实现在线监测的关键技术之一。针对目前普遍应用的中空纤维膜对CH4、C2H6、C2H4、C2H2、H2、CO和CO2分离效果不好导致监测灵敏度低的问题,论文提出了以聚四氟乙烯、聚偏氟乙烯和聚六氟丙烯为原料,掺杂纳米氧化物Al2O3,基于L-S法,制成掺杂Al2O3纳米中空纤维膜。与普通中空纤维膜进行了渗透效果对比试验,得到了渗透特性曲线。研究表明:在相同温度、压力条件下,纳米氧化物中空纤维膜弥补了普通中空纤维膜对CH4、C2H6、C2H4、C2H2、H2、CO和CO2渗透效果不佳及油气平衡时间过长不能适应在线监测的缺陷,有效提高了中空纤维膜的油气渗透特性,为提高变压器油中溶解气体的监测灵敏度、实现在线监测的良好应用奠定了技术基础。With the transformer's running, the oil dissolved gas category, content, and trends can effectively reflect the operational status of the transformer, and it's very important to real-time monitor the dissolved gases changes in transformer oil for ensuring the safe operation of the transformer. The key to transformer oil dissolved gas line monitoring is gas separation technology. To solve the problem of bad separation effect for CH4、C2H6、C2H4、C2H2、H2、CO and CO2 by the common fiber membrane, the polytetrafluoroethylene, polyvinylidene fluoride and hexafluoropropylene are taken as polymer materials, doped with nanoparticles of oxide Al2O3, and obtained the nano-oxide hollow fiber membrane with L-S method. Comparative tests of penetration effect are conducted, to obtain the curve of the permeability characteristics of the nano-oxide hollow fiber membrane. The results show that at the same conditions of temperature and pressure, the nano-oxide hollow fiber membrane solves the defects of penetration effect and the long equilibration time on the common fiber membrane, effectively improves the oil and gas permeability characteristics of the hollow fiber membrane, and provides a good technical support to online monitoring application.

关 键 词：溶解气体 油气渗透 中空纤维膜 Al2O3纳米掺杂 监测灵敏度 

分 类 号：TM41[电气工程—电器]