摘要
大型常压LNG储罐是LNG接收站中非常重要的单元设备,其冷却过程是LNG接收站试运投产过程中风险最大、最难控制的一个环节。详细介绍了LNG接收站试运投产过程中LNG储罐的冷却过程,冷却前提条件及注意事项。分析讨论了LNG储罐冷却过程中储罐温度变化趋势、冷却喷淋流量、冷却速率及温度监测点最大温差等技术参数之间的相互联系。指出冷却过程容易出现管道变形受阻,管道法兰连接处泄漏,冷却流量控制不均造成储罐温降不均,以及火炬系统易产生积液等问题,给出相应的解决方法。研究成果可为其他LNG接收站试运投产过程中LNG储罐的冷却提供参考。
The large-scale atmospheric LNG tank is a very important unit equipment in LNG terminal, and its cooling process is the highest risk link and is the most difficult to be controlled in the commissioning and test run process of LNG terminal. In this paper, the cooling process preconditions and precautions of LNG storage tanks in the commissioning and test run process of LNG terminals are introduced in detail, and the relations between technical parameters in the cooling process, such as temperature trend, the trial operation of the LNG terminal, tank temperature trends, spray cooling flow rate, cooling rate and maximum temperature difference in monitoring point in LNG storage tank during the cooling process are analyzed and discussed. It is pointed out that in the cooling process the problems such as pipeline＇s deformation to blockage, leaking at pipe flange connection, uneven temperature decrease of the storage tank due to uneven cooling rate control, and liquid accumulation in flare system, etc. will easily occur. Relative measures against these problems are given. The research results can provide a reference to the cooling of LNG storage tank in the commissioning and test run process of other LNG terminals. （6 Figures, 5 References）
出处
《油气储运》
CAS
2013年第5期517-520,共4页
Oil & Gas Storage and Transportation
关键词
LNG储罐
冷却
试运投产
温度变化趋势
冷却喷淋流量
冷却速率
LNG tank, cooling, commissioning and test run, temperature trend, spray cooling flow rate, cooling rate
