液化天然气BOG的计算方法与处理工艺  

BOG calculation method and processing technique of liquefied natural gas

作　　者：孙宪航[1] 陈保东[1] 张莉莉[1] 刘杰[1] 李征帛[1] 杜义朋[1] 

机构地区：[1]辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001

出　　处：《油气储运》2012年第12期931-933,967,共3页Oil & Gas Storage and Transportation

摘　　要：介绍了液化天然气蒸发气(BoilOffGas,BOG)的产生原因,不同条件下BOG量的计算方法,以及直接压缩和再冷凝两种BOG处理工艺。利用伯努利方程定量地对两种处理工艺的能耗进行对比,并进行实例验算。结果表明:在相同工况下,再冷凝工艺比直接压缩工艺节能,且处理的BOG量越大、LNG储罐储存压力越低﹑外输管网压力越高,再冷凝工艺的节能效果越明显。得出结论:再冷凝工艺适用于大型LNG接收站处理BOG,直接压缩工艺适用于小型LNG卫星站处理BOG。This paper introduces the BOG (Boil Off Gas) properties of LNG,and the BOG calculation method under different conditions,as well as two BOG processing techniques,direct compression technique and re-condensation technique.Two processing techniques are compared quantitatively with Bernoulli Equation and checking computations with examples are made.The results show that under same working conditions,the re-condensation technique can save energy compared to direct compression technique,and the greater the BOG processing quantity is,the lower storage pressure of LNG storage tank is,and when the pressure of pipeline network is higher,then the energy saving effect is more obvious.The conclusion is that the re-condensation technique is applicable to the BOG processing of large-scale LNG terminal,and direct compression technique is applicable to small-sized LNG satellite station.

关 键 词：液化天然气 BOG 计算方法 处理工艺 直接压缩 再冷凝 

分 类 号：TE82[石油与天然气工程—油气储运工程]