煤间接液化中费托合成单元装置的分析

在基于PRO/Ⅱ对低温费托合成系统进行模拟及优化的基础上,采用热力学分析方法,对低温费托合成系统进行了量衡算,分析了系统中各主要能耗单元的效率和损失状况。计算结果表明,系统中损失最大的过程是费托合成反应过程。费托合成反应器是损失最大的设备,效率为86.80%,损失占了总损失的85.15%;冷凝液回流泵效率最低,只有6.71%;效率最高的为石蜡收集槽、石蜡泵、石蜡中间槽等,几乎没有损失。采用热力学分析方法可以更准确地揭示系统中各环节和设备的最大损失,为改进设备、节约能源提供目标和对策。

Exergy analysis of Fischer-Tropsch synthesis unit apparatus during coal indirect liquefaction

Based on the PRO/Ⅱ simulation and optimization results of low temperature Fischer-Tropsch synthesis(FTS) system,the exergy thermodynamic analysis was applied to calculate the exergy distribution of Fischer-Tropsch synthesis system.The exergy efficiency and exergy losses of this system were also analyzed.The results show that FTS reaction process is the largest exergy loss process.The equipment with the maximum exergy loss is FTS reactor,with exergy efficiency 86.80%,sharing 85.15% of total exergy loss;the condensate backflow pump has the lowest exergy efficiency,which is only 6.71%;the exergy efficiencies of wax collection tank,wax pump and wax intermediate tank are the highest,which have no exergy loss nearly.By using exergy analysis method,it can be more accurate and convenient to uncover the process and devices with the maximal exergy loss,which can set up the target and provide suggestions for equipment improving and energy saving.