硝酸熔盐在土壤中的泄漏迁移实验  

Experimental Study of the Leakage of Nitrate Molten Salt in the Soil

作　　者：吴谨巧 丁静[1] 陆建峰[1] 梁明桦 

机构地区：[1]中山大学工学院,广州510008

出　　处：《工程热物理学报》2017年第6期1300-1304,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.U51436009;No.U51476190);国家科技支撑计划课(No.U2014BAA01B01);中央高校基本科研业务费专项资金

摘　　要：硝酸盐作为传热蓄热介质被广泛应用于太阳能热发电系统中,但在特殊情况下硝酸盐会从系统中泄漏并造成环境污染。本文研究了高温硝酸熔盐泄漏在土壤内部的迁移情况,并探究了对熔盐在石英砂中迁移渗透的影响因素。研究发现初始泄漏温度越高,熔盐在石英砂中的冷却结块后的中心厚度越大,四周的渗透深度也越大,但直径会越小;而泄漏高度越高,熔盐在石英砂中的冷却结块厚的中心厚度越大,熔盐的水平扩散直径越小,边缘厚度也越薄。As heat transfer and storage media, the nitrate is universally applied in the solar power plants systems. If the non-ideal situation occurred, the high temperature nitrate would leak out from systems, and would pollute the environment. In this paper, the leakage situation of nitrate molten salt with high temperature in the soil was studied, and the influencing factors of migration and infiltration of molten salt in quartz sand were investigated. It was found that the higher the initial leakage temperature, the larger the central thickness of the final molten salt block after cooling in quartz sand; the larger the migration depth of the block surrounds, but the smaller the diameter. In addition, the higher the height of the leakage, the larger the central thickness of the final molten salt block after cooling in quartz sand; the smaller the diameter; the thinner the migration depth of the block surrounds.

关 键 词：太阳能利用 硝酸熔盐 泄漏 迁移 

分 类 号：TK02[动力工程及工程热物理]