大型LNG储罐静态日蒸发率的计算方法

发布时间：2019-04-17 09:19

【摘要】：大型LNG储罐通常在微正压低温条件运行,无论静态还是动态工况运行,环境热量漏入均会导致LNG闪蒸气化,造成气损,增加生产成本,并有可能造成LNG分层而发生翻滚,使罐内压力上升带来安全威胁。根据大型LNG储罐的结构特征,给出了较为简便的日蒸发率计算方法;提出了光照对储罐漏热量的影响,并给出不同条件下储罐表面温度的简便计算公式。将该计算方法应用于某16×104 m3的LNG储罐日蒸发率计算,其计算结果达到大型LNG储罐蒸发率的通用要求;运用液位差间接法对储罐实际蒸发量进行了计算,其结果与上述简便公式计算值较为一致。该简便计算方法可为LNG储罐保冷设计、施工及生产过程中的绝热性能衡量提供较为准确的分析方法和依据。
[Abstract]:Large-scale LNG storage tanks are usually operated under low temperature conditions of micro-positive pressure, whether static or dynamic operation, environmental heat leakage will lead to LNG flash gasification, resulting in gas loss, increase production costs, and may cause LNG stratification and roll over. Raising the pressure in the tank poses a security threat. According to the structural characteristics of large-scale LNG storage tank, a simple calculation method of daily evaporation rate is given, and the effect of illumination on the heat leakage of storage tank is proposed, and the simple formula for calculating the surface temperature of storage tank under different conditions is also given. The calculation method is applied to the calculation of the daily evaporation rate of a 16 脳 104m3 LNG storage tank, and the calculated results meet the general requirements of the evaporation rate of a large LNG storage tank. The actual evaporation of the storage tank is calculated by the indirect method of liquid level difference. The results are in good agreement with the calculated values of the simple formula mentioned above. This simple calculation method can provide a more accurate analysis method and basis for the thermal insulation performance measurement of LNG storage tank in the design, construction and production process.
【作者单位】：昆仑能源湖北黄冈液化天然气有限公司;新疆新捷股份有限公司;
【分类号】：TE972

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