机构地区: 华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室
出 处: 《陕西科技大学学报(自然科学版)》 2007年第3期68-72,76,共6页
摘 要: 介绍了一种利用液化天然气(LNG)冷量用于空气分离的流程,并采用模拟软件Asp-en Plus对整个流程进行了模拟与分析.计算结果表明,利用LNG冷量的空分装置,单位液体空分产品的生产能耗由传统装置的1.000 kW.h.kg-1降低至0.300 kW.h.kg-1,节能效果显著.LNG经空气分离装置回收利用冷量后,其温度仍然很低,剩余的冷量可继续用于低温粉碎和冷库等项目.作者对空气分离流程中的主要设备进行了模拟分析,并且分析了循环氮气被压缩至不同的压力对单位空分产品能耗的影响,结果表明,循环氮气压缩的压力越高,则LNG的用量越少,但单位液体空分产品的能耗基本不变. An air separation process by using LNG cold energy was introduced in this work. Aspen Plus software was used to simulate and analyasis this process. The results showed that unit power consumption of liquid air separation products was 0. 300 kW · h/kg by using cryogenic energy of LNG for manufacture of liquid nitrogen, liquid oxygen and lowering inlet temperature of RN compressors. The output temperature of LNG stream in the process was still low, and its cold energy could be further used in cold warehouse, cryogenic crushing and so on. When the RN was compressed to a higher pressure, a less amount of LNG were required, and the unit power consumption of liquid products has increased little.
领 域: [动力工程及工程热物理] [动力工程及工程热物理]