摘要
小型撬装LNG装置的体积小、运输安装灵活、开停方便,适用于采集偏远气井与零散放空,在我国具有重大战略价值。本文采用HYSYS软件模拟了MRC、N_2-CH_4 Expander和C_3/MRC三种液化流程,根据模拟结果,对液化流程的能耗、制冷剂循环量等参数进行了对比分析。最终,优选出适用于小型LNG装置的最经济可行的液化流程。通过本文的研究,可以了解不同制冷工艺的优缺点及适用条件,对实际生产中对制冷流程的选择与优化有一定的意义。
The skid mounted LNG plant is small in size, flexible in transportation and installation. Besides, it is convenient to start or stop. As it is suitable for collecting gas from remote gas wells and scattered emptying, small-scale LNG plant has great strategic value in our country. In this paper, three liquefaction processes of MRC, N_2-CH_4, expander and C_3/MRC were simulated by HYSYS software. According to the simulation results, the energy consumption, refrigerant circulation and some other parameters of the liquefaction processes were compared and analyzed. Finally, the most economically feasible liquefaction process suitable for small-scale LNG plant was selected. This paper shows the advantages and disadvantages of different refrigeration processes and their application conditions, which is of some significance to selection and optimization of refrigeration process in actual production.
引文
[1]张朋波,王兆银,张兴兴,等.天然气液化预处理工艺流程[J].煤气与热力,2009,29(9):5-7.
[2]戴兴星,刘伟,涂金华,等.LNG液化工艺流程及现场运用综述[J].广州化工,2015(1):35-38.
[3]王敏娟,何冷,徐亦飞.级联式天然气液化过程的分析[J].北京石油化工学院学报,2016,24(3):23-27.
[4]赵敏,厉彦忠.丙烷预冷混合制冷剂液化流程中原料气与制冷剂匹配研究[J].西安交通大学学报,2010,44(2):108-112.
[5]李素燕.小型氮气膨胀天然气液化流程数值模拟及增压透平膨胀机的设计[D].哈尔滨工业大学,2006.
[6]王保庆.天然气液化工艺技术比较分析[J].天然气工业,2009,29(1):111-113.