接收站LNG储罐压力控制技术优化

Optimization of Pressure Control Technology of LNG Storage Tank in Receiving Station

分析常用的LNG储罐压力的控制方式,以大连LNG接收站为例,探讨卸船工况下应用顶进料和底进料相互配合的控制方式,调整底进料阀和顶进料阀的相对开度。控制储罐压力,非卸船工况下通过提高储罐运行压力来减小储罐的静态蒸发率,节省BOG压缩机的能耗。

The commonly used control modes of LNG storage tank pressure are analyzed. Taking the Dalian LNG receiving station as an example,the control mode of mutual coordination between the top feeding and the bottom feeding in the unloading condition is discussed,and the relative openings of the bottom feeding valve and the top feeding valve are adjusted to control the tank pressure. In non-unloading condition,the operating pressure of the tank is increased to reduce the static evaporation rate of the tank,and the energy consumption of the BOG compressor is saved.