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根据低温甲醇净化工艺流程,利用Aspen Plus软件建立了费托合成油尾气重整气的低温甲醇净化过程的数学模型,获得了净化气流量、各组分体积分数等关键参数,并与实际数据对比,二者相互吻合.采用灵敏度分析方法进行了分析优化,结果表明吸收塔装置处理负荷可提高8.84%.当吸收塔负荷不变、且净化气出口CO2的体积分数低于0.5%时,贫甲醇液的温度控制范围为-44～-41℃,吸收塔贫甲醇液量和热再生塔的蒸馏速率分别降低了11.96%和9.55%,净化过程总能耗下降9.43%.
According to the low-temperature methanol purification process, the mathematical model of the low-temperature methanol purification process of Fischer-Tropsch oil tail gas reformed gas was established by using Aspen Plus software. The key parameters of purifying gas flow, volume fraction of each component were obtained and compared with the actual data The results show that the processing load of the absorption tower can be increased by 8.84% .When the load of the absorption tower is constant and the volume fraction of CO2 at the exit of the purification gas is less than 0.5%, the sensitivity of the analysis method The temperature control range of methanol solution is -44 ~ -41 ℃, the volume of lean methanol in absorption tower and the distillation rate of thermal regeneration tower are reduced by 11.96% and 9.55%, respectively, and the total energy consumption of purification process is decreased by 9.43%.