摘要
基于环己烷-乙醇共沸物的压力敏感特性,以最小年总费用(TAC)作为经济评价指标,模拟了变压精馏工艺流程,设计和优化了低压塔和高压塔的进料位置、回流比和塔板数。结果表明:低压塔和高压塔的最佳进料位置为第20块和第14块塔盘,回流比为2.3和2.7,塔板数为26块和20块。根据工艺优化参数,对常规变压精馏工艺进行热集成设计,相比之下,TAC减少了319.4×10^(3)美元/a,TAC节约率为32.3%。装置总能耗减少6032.2 kW,节能率为51.6%。
Based on the pressure sensitive characteristics of the cyclohexane-ethanol azeotrope system,the process of pressure swing distillation was researched with the minimum total annual cost(TAC)as the economic evaluation index.The feed position,reflux ratio and tray numbers of low-pressure column and high-pressure column were designed and optimized.The results show that the optimal feeding positions of the low-pressure column and the high-pressure column are the 20th and 14th trays,with reflux ratios of 2.3 and 2.7,and tray numbers of 26 and 20,respectively.Based on the process optimization results,the conventional pressure swing distillation process is designed for heat integration.Compared with the TAC and energy consumption of the conventional pressure swing distillation process,the TAC is reduced by 319.4×10^(3)USD/year,the TAC saving rate is 32.3%.The total energy consumption of the process has been reduced by 6032.2 kW,with an energy saving rate of 51.6%.
作者
兰荣亮
Lan Rongliang(SINOPEC Nanjing Engineering Co.,Ltd.,Nanjing 210049,Jiangsu,China)
出处
《精细石油化工》
CAS
2023年第6期55-59,共5页
Speciality Petrochemicals
关键词
环己烷-乙醇
变压精馏
模拟与优化
cyclohexane and ethanol
pressure swing distillation
simulation and optimization
