电力设备中SF_6混合绝缘气体净化分离技术的探究  

Investigation into the Purification and Separation Technology for SF_6 Gas Mixtures Used in Electrical Apparatus

作　　者：刘伟[1] 苏镇西[1] 祁炯[1] 程伟[1] 马凤翔[1] 朱峰[1] 

机构地区：[1]国网安徽省电力公司电力科学研究院国网公司六氟化硫气体特性分析与净化处理技术重点实验室,合肥230022

出　　处：《高压电器》2016年第12期227-231,共5页High Voltage Apparatus

摘　　要：为解决SF_6气体的温室效应及低温易液化问题的日益突出,SF_6/N_2、SF_6/CF_4等混合绝缘气体被认为是目前最有发展前景的替代介质,开始在气体断路器(GIC)以及气体输电管线(GIL)、GIS母线等非灭弧气室中推广应用。然而,大规模推广应用前,必须先解决混合气体的回收、净化处理等关键问题。由于SF_6混合绝缘气体与纯SF_6气体性质上有较大的区别,文中针对SF_6/N_2和SF_6/CF_4混合绝缘气体特性,提出了用多级高分子膜、深冷相变分离和低温精馏方法联用的混合气体分离净化方案,经过处理后能得到较高纯度的SF_6气体和CF_4气体,N_2纯度达到99%,可直接排放至大气。To address the issues associate with SFs such as its greenhouse effect and liquefaction at low temperature,SF6/N2 and SF6/CF4 gas mixtures are viewed as the most promising substitute for SF6 and have started to be used in non-arcing insulation chambers, such as in gas-insulated circuit breaker （GIC）, gas-insulated transmission line （GIL） and GIS bus duct （GIB）. Before SF6 gas mixtures are widely used, key issues associated with gas mixture handling and recycling have to be adequately addressed. Since SF6 gas mixtures are remarkably different from pure SFs gas in their properties, based on the insulating characteristics of SF6/N2 and SF6/CF4 gas mixtures, a technical procedure combining multi-polymeric membrane, cryogenic separation and cryogenic distillation has been proposed to purify the gas mixture. After the separation process, SF6 and CF4 gas of very high purity are obtained and the concentration of N2 can be as high as 99%, which enables its direct discharge into the atmosphere.

关 键 词：SF6混合绝缘气体 净化分离技术 膜分离 深冷相变分离 低温精馏 

分 类 号：TM507[电气工程—电器]