摘要
采用Aspen Plus软件对异丙醚-异丙醇共沸物进行了变压精馏过程模拟。低压塔压力设定为六盘水地区大气压85kPa,高压塔压力设定为300kPa。以年度总费用TAC最小为依据,对各项设计变量如理论塔板数、回流比和进料位置等进行了优化。结果表明,在异丙醚-异丙醇混合物处理量为100kmol/h,摩尔分数异丙醚为20%,异丙醇为80%时,采用变压精馏可以使异丙醚和异丙醇产品纯度均达到99.9%。在此基础上,通过调节两塔的回流比,进行了完全热集成工艺设计。相比无热集成工艺,完全热集成工艺的设备投资和操作费用均明显降低,TAC节约了27.64%。结果表明完全热集成变压精馏工艺可以有效分离异丙醚-异丙醇共沸物,且经济上更合理,为高海拔地区此类共沸物的分离提供一些技术参考。
The separation of diisopropyl ether-isopropanol azeotrope by pressure swing distillation process was simulated by Aspen Plus software. The pressure of the low pressure column was set to the atmospheric pressure of 85 kPa in Liupanshui area, and the pressure of high pressure column was set to 300 kPa. Based on minimizing the total annual cost TAC, various design variables such as theoretical tray number, reflux ratio and feed position were optimized. The results show that the purities of diisopropyl ether and isopropanol can both reach 99.9% by pressure swing distillation when the processing capacity of diisopropyl ether(20% by mol)-isopropanol mixture(80% by mol) is 100 kmol/h. On the above basis, the fully heat integrated process design was carried out by adjusting the reflux ratios of two columns. Compared with the non-heat integrated process, the equipment investment and operating cost of the fully heat integrated process are significantly reduced, and TAC saves by 27.64%. The results indicate that the fully heat integrated pressure swing distillation process can effectively separate diisopropyl ether-isopropanol azeotrope with more reasonable economy. It provides some technical references for the separation of such azeotropes in high altitude areas.
作者
李静
王克良
施兰
连明磊
杜廷召
LI Jing;WANG Ke-liang;SHI Lan;LIAN Ming-lei;DU Ting-zhao(College of Chemistry and Materials Engineering,Liupanshui Normal University,Liupanshui 553004,China;North China Company,China Petroleum Engineering and Construction Company,Renqiu 062550,China)
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2019年第5期87-92,共6页
Natural Gas Chemical Industry
基金
贵州省科技厅联合基金项目（黔科合J字LKLS [2013]27号）
卓越工程师培养计划(LPSSYzyjypyjh201702)
校级教研项目（LPSSYjg201909）
校级教研项目（LPSSYjg201910）
校级科研项目（LPSSY201702）
贵州省教育厅特色重点实验室项目（[2011]278）
关键词
变压精馏
异丙醚
异丙醇
完全热集成
pressure swing distillation
diisopropyl ether
isopropanol
full heat integration
