摘要
LNG接收站卸料作业作为接收站的主要工艺操作内容,除必须确保安全接卸外,还需满足LNG船滞港时间要求。以青岛LNG接收站为例,指出作业超出计划时间、卸料臂预冷速度不均、储罐压力上升过快、BOG再冷凝器运行不稳定等卸料作业过程中常见的问题并对其原因进行了分析,针对这些问题提出了相应的解决措施:优化排凝操作,预冷过程中船方压力稳定至0.3 MPa,加速卸料阶段应控制卸料速度。采取上述措施后卸船工艺操作时间缩短了2小时以上,再冷凝器及储罐等设备工艺操作更加平稳。
As the main process in most LNG terminals, discharging not only ensures safe receiving and unloading, but also meets the demand of LNG ship's demurrage time. Taking the Qingdao LNG Terminal as an example, we found out some common problems during discharging, including operation time over planned time, uneven pre-cooling speed for discharging leg, rapid increase of tank pressure, and unstable operation of BOG recondenser. And then,their reasons were analyzed. Finally, some countermeasure were made, including(1)to optimize the condensate discharge,(2)to keep the ship pressure at 0.3 MPa during precooling process, and(3)to accelerate the controllable discharge speed. After adopting these measures, discharge time might be shortened by over 2 hours,and some facilities such as recondenser and storage tank also became more stable and flexible.
出处
《天然气技术与经济》
2017年第4期47-50,共4页
Natural Gas Technology and Economy
