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针对甲烷氧化偶联法制烯烃产物气体的分离,提出一种以甲苯为吸收剂吸收乙烯的吸收分离工艺。采用As-pen Plus流程模拟软件分别对甲苯吸收乙烯分离工艺和AgNO3络合吸收乙烯分离工艺进行了模拟,提出了两个工艺的能量利用情况数据。研究结果表明,甲苯吸收分离工艺的电耗比AgNO3络合吸收分离工艺节省电耗95.23%,同时系统可自产蒸汽和冷量满足内部需求。采用能流结构图直观地分析了甲苯吸收乙烯分离工艺,揭示了系统火用损失发生的主要部位和原因,说明了系统的节能效果。
Aiming at the separation of olefin product gas by the method of methane oxidative coupling, an absorption and separation process using toluene as absorbent to absorb ethylene was proposed. As-pen Plus flow simulation software was used to simulate the toluene absorption ethylene separation process and the AgNO3 complex absorption ethylene separation process respectively, and the energy utilization data of the two processes were proposed. The results show that the power consumption of toluene absorption separation process is 95.23% lower than that of AgNO3 complex absorption separation process, and the system can produce steam and cold to meet the internal demand. The energy flow structure diagram is used to directly analyze the toluene absorption ethylene separation process, reveals the main parts and causes of the system exergy loss, and illustrates the energy saving effect of the system.