摘要
中国的天然气储量丰富,分布在边远气田内的天然气可以通过小型的液化工厂处理成为液化天然气(LNG),这样更加有利于天然气的储存、运输。本文利用HYSYS对N_2-CH_4膨胀液化流程进行模拟,并分析天然气的温度、压力和流量,以及制冷剂高压压力对液化系统单位功耗的影响。得出适当地降低天然气的温度、制冷剂高压压力和提高天然气的压力、流量都有利于降低液化流程的单位功耗。
China has abundant natural gas reserves, and small-scale gas liquefaction plant can be used to process natural gas into Liquefied Natural Gas(LNG) in the remote gas field. It is more conductive to storage and transportation. In this paper, N_2-CH_4 expansion liquefaction process was simulated by HYSYS, and influences of gas temperature, pressure and flow rate, as well as the refrigerant high pressure on the power consumption ratio were analyzed. The results show that reduce the temperature of natural gas, refrigerant high-pressure, as well as improve the pressure and flow rate of natural gas appropriately can reduce the power consumption ratio of N_2-CH_4 Expansion liquefaction process.
引文
[1]王南,裴玲.中国非常规天然气资源分布及开发现状[J].油气地质与采收率,2015,22(1):26-31
[2]邱孝培.我国天然气勘探开发利用形式和化工利用设想[J].天然气化工,1996,21:12
[3]顾安忠.液化天然气技术[M].北京:机械工业出版社,2004
[4]李士富,呼延念超,李亚萍.调峰型天然气液化HYSYS软件模型[J].石油与天然气化工,2010,39(1):1-2.
[5]李佩铭,焦文玲,张世泽,等.天然气液化中采用PR方程的气液相平衡计算[J].煤气与热力,2008,28(4):B21-B24.
[6]唐迎春,陈保东.P-R方程在天然气热物性计算中的应用[J].石油化工高等学校学报,2005,18(2):47-49.