两种撬装型天然气液化流程的参数比较  

Parameter comparison of two small-scale natural gas liquefaction flows in skid-mounted package

作　　者：曹文胜[1] 鲁雪生[1] 顾安忠[1] 汪荣顺[1] 

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200030

出　　处：《低温工程》2005年第5期36-39,52,共5页Cryogenics

基　　金：福建省自然科学基金(E0440002);福建省教育厅资助项目

摘　　要：设计了两套典型的撬装型天然气液化流程,对流程进行了模拟计算,比较了两者的关键参数,并分析了各换热器中管路换热负荷-温度的分布情况。结果表明:在没有丙烷预冷的前提下,采用N2-CH4膨胀机液化流程优于混合制冷剂液化流程;较大的温差和换热负荷是造成换热器火用损失的主要原因;压缩机功耗对比功耗影响很大,应采用多级压缩、级间冷却方式。Two typical types of small-scale natural gas liquefaction flows in skid-mounted package were designed and calculated simulatively.The key parameters of two flows were compared,and the heat exchange load-temperature distribution rule of the pipelines in heat exchangers were also analysed.The results show that the N_2-CH_4 expander cycle has advantage over the mixed-refrigerant cycle on the premise of no propane pre-cooling.More differences in temperature and heat exchange loads are the primary reasons of exergy loss in heat exchangers.The power consumption of compressors is more influential to specific power/LNG mol,so the mode of multilevel compression and level gap cooling should be adopted.

关 键 词：撬装型 天然气 液化流程 模拟计算 

分 类 号：TE646[石油与天然气工程—油气加工工程]