LNG全容储罐保冷系统及其性能探究
Study on Cold Insulation System of Full Containment LNG Storage Tanks and Its Performance
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- 引用格式:
-
杨丝桑,相华.LNG全容储罐保冷系统及其性能探究[J].天然气与石油,2016,34(4):0.doi:
Yang Sisang, Xiang Hua.Study on Cold Insulation System of Full Containment LNG Storage Tanks and Its Performance[J].Natural Gas and Oil,2016,34(4):0.doi:
- DOI:
- 作者:
- 杨丝桑1 相 华2
Yang Sisang, Xiang Hua
- 作者单位:
- 1.石油化工管理干部学院, 2.俄罗斯国立古勃金石油天然气大学
1.Sinopec Management Institute;2.Gubkin Russian State University of Oil and Gas
- 关键词:
- LNG;大型全容储罐;保冷材料;保冷安装;漏热量;日蒸发率;保冷设计
LNG; Large full containment storage tank; Cold insulation materials; Cold insulation installation; Quantity of heat leakage; Daily evaporation rate; Cold insulation design
- 摘要:
- 为了探究LNG全容储罐的绝热性能和保冷系统,给出了LNG储罐各部分主要的保冷材料及其性能特征,以及可供参考的保冷系统施工工序和安装方法。分别从罐底、罐壁和罐顶分析漏热量,提出了大型LNG全容储罐漏热量和静态日蒸发率的计算方法。以国外某20×104 m3 LNG储罐为例给出了漏热量和日蒸发率的计算结果,得出其日蒸发率符合保冷设计要求。分析影响LNG储罐蒸发率的主要因素,得出LNG储罐存在一个“最优直径”和“最优充满率”,可通过增大保冷层厚度,选取导热系数小的保冷材料,向LNG储罐内充注氮气等措施来降低储罐的日蒸发率,为LNG储罐的保冷系统设计提供依据。
To study the thermal insulation property and cold insulation system of LNG tanks of full containment, main cold insulation materials and its performance of each part of LNG tanks were provided with construction procedures and installation instruction for reference. Based on the overall structural features of large LNG storage tank, the paper analyzes the quantity of heat leakage respectively at the bottom, wall and top of the storage tank, and puts forward a computing method for both the quantity of heat leakage and the daily static evaporation rate of large full containment LNG storage tank. Taking certain overseas 200,000 cubic meter LNG storage tank as an example, the paper provides the calculation results of heat leakage quantity and the daily evaporation rate and verifies that its daily evaporation rate is satisfactory. From the analysis of main factors affecting the evaporation rate of LNG storage tank, the paper finds out "the best diameter" and "the optimal filling rate" relevant to the LNG storage tank. Through raising the thickness of cold insulation layer, adopting the cold insulation material with small coefficient of thermal conductivity, and filling the LNG storage tank with nitrogen, etc., the daily evaporation rate of storage tank can be lowered, and in this way a basis can be provided for the design of cold insulation system for LNG storage tank.
