doi:10.3969/j.issn.16715152.2015.06.002
季超等·山东LNG接收站轻烃回收分析
山东LNG接收站轻烃回收分析
口中国石化青岛液化天然气有限责任公司（325000）季超丁乙张龙焕
摘
要：相比国内其他LNG接收站，山东LNG接收站已确定的200万t/a气源中重组分多，热值高。
由于我国当前的天然气贸易计量一直是在法定的质量指标下按体积计量，如果山东LNG 接收站天然气不经处理直接进入中国石化现有的山东天然气管网，一方面，由于两者沃泊指数偏差大，将出现与现有山东管网天然气互换围难的问题，另一方面，如果两者按照同样价格销售，将偏离山东LNG接收站天然气本身的价值，从而降低山东LNG接收站的经济效益。为解决以上问题，需将天然气热值降低。本文阐述了降低天然气热值的方法，即掺混空气或氮气法、多气源混配和轻烃分离法等，并重点分析了山东LNG接收站引入轻烃回收的优势和必要性。
关键词：山东LNG天然气轻烃圆收热值互换性沃泊指数
NecessityAnalysisofShandongLNGTerminal
LightHydrocarbon Recovery
GasCompany,SinopecJiChao,DingYi,ZhangLonghuan
Abstract :Compared with otherdomestic LNG terminals, Shandong LNG terminal will import 200 tons
of LNG per year from Papua_New_Guinea witch contains more heavier components and have a higher calorific value. Since the present status of natural gas trade metrology at home is still based on volume metering, if gas from Shandong LNG terminal send into Shandong natural gas pipeline network which belongs to Sinopec without any treatment, problems will come: 1、as the Wobbe indexof the two sources of gases has a huge deviation, it will be hard for gas from Shandong LNG terminal to interchange with gas from Shandong natural gas pipeline network;2、if gas from Shandong LNG terminal sells at the same price with gas from Shandong natural gas pipeline network- that is it is not sold as its value, the economic benefits of Shandong LNG terminal will be reduced. In order to solve problems above,the calorific value shall be lowered. This paper deals with the study of the methods to reduce the calorificvalue, that is blending with air or nitrogen, blending with other sources of gas and recovering light hydrocarbon, and particularly analyze the advantages and necessity of Shandon LNG terminal light hydrocarbon recovery.
Shandong LNG terminalnatural gaslight hydrocarbon recovery
Keywords:$
calorificvalue
interchangeability
Wobbeindex
城市燃气2015/06总第484期丨7
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