环己烷在碘吸附器活性炭床上的解吸行为研究  

Study on desorption behaviour of cyclohexane in activated carbon of iodine adsorber

作　　者：俞杰[1] 杜建兴[2] 王龙江[1] 李永国[1] 马英[1] 乔太飞[1] 李彦樟 YU Jie;DU Jianxing;WANG Longjiang;LI Yongguo;MA Ying;QIAO Taifei;LI Yanzhang(China Institute for Radiation Protection,Taiyuan 030006;Daya Bay Nuclear Power Operations and Management Co. Ltd, Guangdong Shenzhen 518124)

机构地区：[1]中国辐射防护研究院环境工程技术研究所,太原030006 [2]大亚湾核电运营管理有限责任公司,广东深圳518124

出　　处：《辐射防护》2018年第3期222-227,共6页Radiation Protection

摘　　要：对环己烷气体在碘吸附器用浸渍活性炭上的动态解吸行为进行了实验研究。考察了不同的载气温度、相对湿度、流速、炭床厚度以及进气中环己烷浓度对环己烷在活性炭床上解吸行为的影响,为环己烷试验方法在碘吸附器现场泄漏率试验的研究及推广提供了一定的理论支撑。试验结果表明:(1)在40℃,30%相对湿度条件下环己烷在活性炭床上可滞留约500 min,增大气流温度、湿度、浓度和载气流速可以减少滞留时间,其中温度对滞留时间的影响最为显著。(2)在气流相对湿度为80%时,浓度为100 ppm(10^(-6))的环己烷在活性炭床上的滞留时间仍达到90 min,这有利于高湿度条件下进行碘吸附器泄漏率试验。Desorption behaviors of cyclohexane gas on activated carbon of iodine adsorber was investigated.Effects of temperature,relative humidity,flow rate,cyclohexane concentration of carrier gas,and thickness of carbon bed were carefully studied to provide technical support for the application of the cyclohexane method in leakage test of iodine adsorber system. Experimental results showed that cyclohexane could be retained for about 500 min in activated carbon bed under the condition of 40 ℃ and 30% relative humidity. The retention time decreased with the increase of temperature,relative humidity,concentration of cyclohexane and flow rate of carrier gas, with the most significant effect from temperature. An experimental result demonstrated that cyclohexane could be used at high humidity conditions to test leakage of iodine adsorber because the retention time of cyclohexane in activated carbon could still reach 90 min at 100 ppm（ 10-6） of cyclohexane and 80% of relative humidity.

关 键 词：核电站 碘吸附器 泄漏率 环己烷 解吸 

分 类 号：TL75[核科学技术—辐射防护及环境保护] O657[理学—分析化学]