关于L-CNG、LNG加气站储罐BOG自动排放系统应用的研究

Research on the Application of the BOG Automatic Discharge System in LNG Tank

LNG储罐BOG自动排放系统应用非常普及,它选用自力式压力释放阀来实现储罐BOG自动排放。但在加气站的LNG储罐一般没有设计BOG自动排放系统,主要原因是采用这种自力式压力释放阀来实现BOG自动排放有一定的缺点,不便于准确、频繁地调整压力参数。本文研究利用PLC站控系统控制气动阀,对储罐BOG进行自动排放,以获得最佳的工艺参数,取得良好的效果,并在新建加气站中推广应用。

The BOG automatic discharge system in LNG tank is a popular application, which is realized by the use of self-reliance type pressure release valve. But generally there is no design for the system in gas station, the main reason is that the system is not convenient for the adjustment of the pressure parameters accurately and frequently. In this paper, we study the use of the PLC control system, which ean control the pneumatic valve for the automatic discharge of BOG, in order to obtain the best process parameters, obtain good effect, and promote the use in the new stations.