电气设备中SF6-N2混合绝缘气体回收关键技术的研究  

Research of the Recovery Key Technologies for the Insulating SF_6-N_2 Gas in the Electrical Equipment

作　　者：赵跃[1] 苏镇西[1] 祁炯[1] 薛冰[1] 李坚林[1] 袁小芳[1] 王海飞[1] 

机构地区：[1]国网安徽省电力公司电力科学研究院,合肥230022

出　　处：《高压电器》2016年第12期151-155,共5页High Voltage Apparatus

基　　金：国家电网公司企业基金资助项目(521200130M1L)~~

摘　　要：电气设备中SF_6-N_2混合绝缘气体已在中国寒冷地区应用较多,因其较低的液化温度,导致现有气体回收技术难以实现SF_6-N_2混合绝缘气体的高效、快速回收。为解决上述难题,文中介绍了一种两级膜分离回收技术,可高效快速分离混合气中SF_6和N_2,获得的产品气中SF_6气体体积分数(V/V)达90%,借助后续压缩、制冷单元可实现50 m3/h混合气的快速灌装;同时文中也借助膜分离技术实现了尾气中微量SF_6气体富集回收,富集后的SF_6气体体积分数(V/V)达92%,且排空的混合气中SF_6气体积分数(V/V)为600μL/L,远低于国标值。因此,该系统可高效快速回收SF_6-N_2混合绝缘气体,且排放的尾气符合国标要求,解决了实际生产中存在的难题。Electrical equipment filled with insulating SF6-N2 gas has been widely used in China＇s cold regions. Due to its relatively low liquefaction temperature, SF6-N2 mixing gas in electrical equipment is difficult to be recycled effectively and rapidly with existing technology. To solve this problem, a two-stage membrane separation and recycling technology has been developed that can efficiently and rapidly retrieve SF6 and N2 gases. The concentration （V/V） of SF6 in the recycled gas reaches 90%. Using the subsequent compression and refrigeration unit, gas recovery rate can reach 50 m3/h. This membrane separation technology can also enrich and retrieve the SF6 gas from exhaust. The concentration of the retrieved SF6 gas can be as high as 92% （V/V）, and the SF6 concentration in the exhaustion is only 600 μL/L（V/V）, much lower than the national standard. Thus, the system can efficiently realize the quick recycling of SF6-N2 insulating mixture and the exhaust emissions meets the national standard. It also solves problems encountered in operation.

关 键 词：电气设备 混合绝缘气体 膜分离 

分 类 号：TM507[电气工程—电器]