新型小型天然气液化流程  

A novel process for small scale liquefaction of natural gas

作　　者：杨文 郭悠悠[2] 曹学文[3] YANG Wen;GUO You-you;CAO Xue-wen(SINOPEC Marketing South China,Guangzhou 510620,China;Oil&Gas Pipeline Control Center,CNPC,Beijing 100007,China;College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石化销售股份有限公司华南分公司,广东广州510620 [2]中国石油天然气股份有限公司北京调控中心,北京100007 [3]中国石油大学(华东)储运与建筑工程学院,山东青岛266580

出　　处：《天然气化工—C1化学与化工》2020年第3期61-65,共5页Natural Gas Chemical Industry

基　　金：国家自然科学基金资助(No.51274232)。

摘　　要：针对目前零散天然气源回收难、调压站压力能浪费的现状,以及传统天然气液化流程存在系统复杂、混合制冷剂配比困难、能耗大等缺点,基于超声速旋流分离器良好制冷效果这一特点,开展Laval喷管(超声速旋流分离器核心部件)制冷特性和液化分析,提出了一种利用超声速旋流分离器作为核心制冷设备的新型小型天然气液化流程。研究结果表明,Laval喷管具有较节流阀、膨胀机等更好的膨胀制冷效果,且结构简单;天然气在Laval喷管中的液化率整体高于节流阀中。当入口压力为5MPa、温度为300K,利用所提出的液化流程回收压力能时其天然气液化率可达到0.1321。In view of the current difficulties in recovering scattered natural gas sources and the waste of pressure energy in pressure regulating stations,as well as the shortcomings of traditional natural gas liquefaction processes,such as complex system,difficult mixing of refrigerants and high energy consumption,based on the good refrigeration effect of the supersonic cyclone separator,an analysis on the refrigeration characteristics and liquefaction behavior of the Laval nozzle(a core component of supersonic cyclone separator)are carried out,and a novel small-scale natural gas liquefaction process using supersonic cyclone separator as core refrigeration equipment is proposed.The research results show that Laval nozzle has better expansion and refrigeration effects than throttle valve and expander,and its structure is simple.The liquefaction rate of natural gas in Laval nozzle is generally higher than that in throttle valve.Under the inlet pressure of 5MPa and the temperature of 300K,the liquefaction rate of natural gas can reach 0.1321 when using the proposed liquefaction process to recover the pressure energy.

关 键 词：小型 天然气 液化工艺 喷管 

分 类 号：TE64[石油与天然气工程—油气加工工程] TQ026.1[化学工程]