N_2-CH_4膨胀天然气液化流程影响因素分析  

Influence factors analysis of N_2-CH_4 expansion and refrigeration process

作　　者：郑云萍[1] 张玮城 郝振鹏[2] 金俊卿[3] 李沙沙[4] 

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]中国石油天然气管道工程有限公司,河北廊坊065000 [3]大港油田公司采油工艺研究院,天津300280 [4]四川石油天然气建设工程有限责任公司,四川成都610215

出　　处：《现代化工》2015年第3期165-168,共4页Modern Chemical Industry

摘　　要：使用Hysys软件对N2-CH4膨胀制冷液化工艺进行模拟计算,分析了天然气压力、混合气预冷温度、混合气预冷压力和混合气中组分的组成等参数对该流程混合气的制冷能力和主要设备功耗的影响。结果表明,提高天然气压力,控制混合气中甲烷摩尔分数在50%左右时,能增强混合气的制冷能力,减少主要设备的功耗。而降低混合气的预冷温度和增加混合气的预冷压力,都会增加系统的功耗。Hysys is employed to simulate the N2-CH4 expansion and refrigeration process. The effects of natural gas pressure,pre-cooling temperature, pre-cooling pressure and compositions of gas mixture on refrigeration capacity and major equipment energy consumption are studied. The results show that when the methane molar content is about 50% of the total gas mixture, the refrigeration capacity can be improved with higher natural gas pressure and the energy consumption of main equipment can be reduced. However,lower pre-cooling temperature and higher pre-cooling pressure of mixture gas result in the increase in the total energy consumption.

关 键 词：天然气液化 N2-CH4混合制冷剂 膨胀制冷 HYSYS 模拟计算 

分 类 号：TE626.7[石油与天然气工程—油气加工工程]