利用LNG冷能制造富氧空气工艺过程的模拟评价  

Simulation and Evaluation of process for producing oxygen-enriched air with LNG cold energy

作　　者：张超[1] 肖立[1] 张炜 刘方[1] 陈锐莹[1] 张玉明 ZHANG Chao;XIAO Li;ZHANG Wei;LIU Fang;CHEN Rui-ying;ZHANG Yu-ming(CNOOC Gas and Power Group Co.,Ltd.,Beijing 100028,China;College of Mechanical and Transportation Engineering,China University of Petroleum-Beijing,Beijing 102249,China)

机构地区：[1]中海石油气电集团有限责任公司,北京100028 [2]中国石油大学(北京)机械与储运工程学院,北京102249

出　　处：《现代化工》2025年第4期245-250,共6页Modern Chemical Industry

摘　　要：针对一种利用LNG接收站中LNG冷能以及产物气冷量回收的富氧空气制造系统构建流程模拟。模拟结果指出该系统能够有效地制造氧气摩尔分数30%的富氧空气。旋风分离器气液分离效率越高,所获得的富氧空气中氧气摩尔分数越高。提高贫氧空气分流比例能够有效提升富氧空气制造产量,但会降低富氧空气中氧气含量。计算得到本系统富氧空气制造能耗约为85 kWh/t,处于适中水平。但本系统动设备较少且拉瓦尔喷管、旋风分离器结构简单制造成本较低,使得系统易于集成并联放大。A process system for producing oxygen-enriched air with utilizing LNG cold energy from LNG terminals and the cold energy recovered from the product gases is simulated.Simulation results indicate that this system can effectively produce oxygen-enriched air in which the oxygen concentration is about 30%.The higher the gas-liquid separation efficiency of the cyclone separator,the higher the oxygen concentration in the obtained oxygen-enriched air.Increasing the recover ratio of oxygen-depleted air can effectively enhance the production output of oxygen-enriched air,but will reduce the concentration of oxygen in oxygen-enriched air.It is obtained from calculation that the energy consumption for producing oxygen-enriched air in this system is approximately 85 kWh/t-O2,which is at a moderate level.However,this system has fewer moving parts,and the simple structure of Laval nozzle and cyclone separator results in low manufacturing cost,making the system easy to integrate and scale up.

关 键 词：富氧空气 LNG冷能 流程模拟 拉瓦尔喷管 旋风分离器 

分 类 号：TE09[石油与天然气工程]