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ICS27.100F20备案号：53939-2016准T/CEC217—2019六氟化硫气体中颗粒含量的测定方法光散射法DeterminationofparticlesinSF6gasbylight-scatteringmethod2019-04-24发布2019-07-01实施中国电力企业联合会发布中国电力企业联合会标准六氟化硫气体中颗粒含量的测定方法光散射法T/CEC217—2019*中国电力出版社出版、发行（北京市东城区北京站西街19号100005）印刷*2019年月第一版2019年月北京第一次印刷880毫米×1230毫米16开本印张千字*统一书号155198.1479定价0.00元版权专有侵权必究本书如有印装质量问题，我社营销中心负责退换T/CEC217—2019T/CEC217—2019I目次前言···································································································································································II1范围······························································································································································12规范性引用文件··········································································································································13术语和定义··················································································································································14方法概述······················································································································································25仪器与设备··················································································································································26试验步骤······················································································································································27测试结果······················································································································································38精密度··························································································································································39报告······························································································································································3T/CEC217—2019II前言本标准按照GB/T1.1—2009《标准化工作导则第1部分：标准的结构和编写》给出的规则起草。请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别这些专利的责任。本标准由中国电力企业联合会提出。本标准由全国电气化学标准化技术委员会（SAC/TC322）归口。本标准主要起草单位：国网浙江省电力有限公司电力科学研究院、国网浙江省电力有限公司嘉兴供电公司、国网安徽省电力有限公司电力科学研究院、国网江苏省电力有限公司电力科学研究院、贵州电网有限责任公司电力科学研究院、国网湖北省电力有限公司检修公司、贝克曼库尔特商贸（中国）有限公司、河南省日立信股份有限公司。本部分主要起草人：明菊兰、胡建根、侯力、胡家元、潘芝瑛、于志勇、李海燕、宋小宁、冯礼奎、周迅、祁炯、朱洪斌、文贤馗、张英、付汉江、汪昌满、汪献忠、宋玉梅。本标准为首次发布。本标准在执行过程中的意见或建议反馈至中国电力企业联合会标准化管理中心（北京市白广路二条一号，100761）。T/CEC217—20191六氟化硫气体中颗粒含量的测定方法光散射法1范围本标准规定了光散射法测定六氟化硫气体中颗粒含量的原理、仪器与设备、试验步骤、测试结果与精密度。本标准适用于六氟化硫气体中颗粒含量的测定，其检测范围为0.1μm～5μm，其他气体中的颗粒含量的测定可参照本方法进行。2规范性引用文件下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本（包括所有的修改单）适用于本文件。GB/T26570.1—2011气体中颗粒含量的测定光散射法第1部分：管道气体中颗粒含量的测定JJF1190尘埃粒子计数器计量校准规范ISO21501-4：2007粒度分布的测定-单粒子光交互方法-第4部分：用于洁净空间的光散射尘埃粒子计数器（Determinationofparticlesizedistribution-SingleparticlelightinteractionmethodsPart4:Lightscatteringairborneparticlecounterforcleanspaces）3术语和定义GB/T26570.1—2011界定的以及下列术语和定义适用于本文件。3.1背景测定值backgroundcount不含有等于或大于规定粒径的被测气体通过粒子计数器时仪器的测定值。注：改写GB/T26570.1—2011，定义3.1。3.2样品体积gassamplevolume每次测定时通过颗粒计数器的样品体积，以标准状态下体积表示（标准状态：0℃，1.01×105Pa）。注：改写GB/T26570.1—2011，定义3.2。3.3颗粒含量particleconcentration测得的等于或大于规定粒径的颗粒总数除以样品体积而得出的值。［GB/T26570.1—2011，定义3.3］3.4粒度/颗粒直径particlesize/particlediameter通过光散射颗粒计数器测定得到的光学当量直径。［GB/T26570.1—2011，定义3.4］T/CEC217—201924方法概述光在行进过程中遇到粉体颗粒（障碍物）时，将偏离原来的传播方向传播，这种现象称为光的散射。光散射颗粒计数器就是根据光的散射原理检测气体中颗粒的含量。光散射颗粒计数器主要由气路系统、光学系统、数据处理系统等组成。其工作原理是：气体中的颗粒对入射光有散射作用，散射光的强度与颗粒粒径有关，当含有颗粒的气体从计数器的采样口进入，通过光敏感区时，受光照射，散射出与粒径成一定关系的光脉冲信号，该信号被光敏器件接受并转换成相应的电脉冲信号，通过对一个检测周期内电脉冲的计数，得到单位体积气体中颗粒的数量及粒度分布。5仪器与设备5.1颗粒计数器根据光散射原理设计的颗粒计数器，颗粒计数器的校准和量值溯源应符合JJF1190或者ISO21501-4：2007的要求，并满足下列要求：a）最小可检测粒径小于等于0.1μm；b）最大背景测定值不大于2个/25L；c）最高工作压力应大于设备内气体压力，或加装减压装置；d）应具备耐蚀功能。5.2减压装置对于只能在大气压力下工作的颗粒计数器，应用减压装置将设备内的气体减压至大气压。该装置不应对气体内的颗粒起阻隔或积聚作用，更不应产生颗粒。推荐使用通过小孔使气体膨胀的减压装置。5.3过滤器过滤孔径小于0.1μm。5.4取样管长度一般不超过2m，内径应不小于2mm，具备防静电功能。6试验步骤6.1仪器背景值的测定将颗粒计数器与干净的气源相连。气源应不含有等于或大于规定粒径的颗粒。推荐的气源准备方法为：在颗粒计数器前加装气体过滤器，其过滤的最小颗粒粒径应小于0.1μm。设置进样流量、进样时间，启动测试程序，测定次数应不小于8次，最终测试结果大于0.1μm背景颗粒含量不大于2个/25L。6.2系统连接对于电气设备、钢瓶、储罐中六氟化硫气体检测，气体经取样阀门，通过减压阀减压再与检测仪器连接，并确保系统无泄漏。T/CEC217—201936.3样品测定系统连接完成后，设置进样流量、进样时间，启动测试程序，至少进行2次平行测试，记录测试结果。6.4仪器的自洁测试结束后，将颗粒计数器与干净的气源相连，开始自洁程序，直至背景测试大于0.1μm背景颗粒含量不大于2个/25L。7测试结果0.1μm、0.2μm、0.3μm、0.5μm、1μm、5μm的累积和差分颗粒含量两次测试结果的平均值作为测试结果。8精密度0.1μm、0.2μm、0.3μm、0.5μm、1μm、5μm的累积和差分颗粒含量大于100个/L时，平行测试相对标准偏差小于10%。9报告报告中至少应包括以下内容：a）有关样品的全部资料，如样品名称、采样地点、采样日期等；b）测定条件，如温度、气体压力等；c）测定仪器的信息，如型号、规格等；d）测定结果，0.1μm、0.2μm、0.3μm、0.5μm、1μm、5μm的累积和差分颗粒含量；e）测定中观察到的任何异常现象；f）测定时间及分析人员的名称；g）测定依据的标准号。