LNG接收站BOG处理工艺优化及功耗分析  

Optimization and energy consumption analysis of BOG treatment processes in LNG terminal

作　　者：薛倩[1] 刘名瑞[1] 肖文涛[1] 王晓霖[1] 张久久 

机构地区：[1]中国石化抚顺石油化工研究院 [2]辽宁石油化工大学

出　　处：《油气储运》2016年第4期376-380,共5页Oil & Gas Storage and Transportation

摘　　要：为优化LNG接收站BOG处理工艺,降低整个接收站的功耗,以外输量为200 t/h、储罐BOG蒸发量为3.04 t/h的某LNG接收站为例,对再冷凝工艺和直接压缩工艺两种典型的BOG处理工艺进行了功耗分析,得出BOG压缩机和LNG高压泵的功耗为整个工艺的主要功耗。运用ASPENHYSYS模拟软件对现有工艺流程进行了优化:在现有BOG处理工艺的基础上,通过对LNG进一步加压至高于外输压力,靠气化后膨胀高压外输天然气做功来实现BOG的压缩和对LNG的加压。优化结果表明:BOG直接压缩工艺和再冷凝工艺分别节约功耗1 616.27 k W、1 270.64 k W。To further optimize the BOG treatment process in LNG terminals and reduce energy consumption of the entire LNG terminal, a LNG terminals with LNG output capacity of 200 t/h and BOG evaporation of 3.04 t/h is taken as an example to analyze power consumptions of two classical BOG treatment processes, namely re-condensation process and direct compression process. The results show that BOG compressors and high-pressure LNG pumps contribute dominant proportions in energy consumption. ASPEN-HYSYS simulation software is used to optimize existing processes. Specifi cally, LNG is further pressurized to a level higher than outlet pressure, and the gasifi cation and expansion of the high-pressure outlet natural gas are used to compress BOG and pressurize LNG. The improved BOG direct compression process and recondensation process can reduce energy consumption by 1 616.27 k W and 1 270.64 k W, respectively.

关 键 词：LNG接收站 BOG再冷凝 直接压缩 加压 工艺优化 

分 类 号：TE89[石油与天然气工程—油气储运工程]