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中文摘要：
为了有效利用液化天然气（LNG）因处于低温位而含有高品质的可用能,提出了一种利用LNG冷能的新型空分流程,以期回收LNG冷能的同时降低空分系统的动力功耗.从热力学角度出发,指出了该LNG冷能回收利用方式的合理性.在详细介绍该流程的组织方式的基础上,着重探讨了流程在安全性、运行压力、调节灵活性和单位能耗等方面的特点.对一氧气产量为10 000 m3/h的流程算例进行了模拟分析,结果表明,该LNG冷能冷却空分流程单位液氧产量的耗电量约为0.4 kW.h/kg,远低于传统空分流程约为1.0 kW.h/kg的耗电量.
英文摘要：
A novel air separation unit cooled by liquefied natural gas （LNG） cold energy was proposed to recover the high-quality energy held in LNG due to its low temperature level while LNG being vaporized for applications at ambient temperatures. The rationality of this air separation process was analyzed from the thermodynamic viewpoint, followed by a detailed introduction of its process arrangement and characteristics, such as safety, operating pressure, adjustment and energy cost. Numerical simulation with Aspen Plus was carried out on a case of 10 000 m^3/h oxygen production unit. The results showed its advantage in energy consumption per kilogram liquid oxygen, which was about 0.4 kW · h/kg, compared with the power input of 1.0 kW · h/kg in a conventional air separation unit.
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