丙酮水吸收-精馏过程分析与能量优化
|
摘要
采用Aspen Plus流程模拟软件,探讨了新型水吸收-精馏工艺过程的丙酮和空气混合的VLA(acetone vapor laden air)丙酮体积分数、温度和吸收剂初始温度等对吸收过程能耗及吸收剂用量的影响,对精馏过程单塔和双塔模型进行了经济分析,并采用夹点技术对吸收精馏流程换热网络进行了设计与优化。结果表明,吸收灵敏性分析的数值模拟结果与工业化装置实际运行数据有高度一致性,最大偏差不超过3. 16%,VLA进料冷却温度、吸收剂冷却温度以及VLA中丙酮体积分数对系统能耗的影响较大。在此基础上研究发现精馏过程的单塔模型相比双塔模型更具优势。基于夹点技术研究优化系统换热网络发现较大节能空间,可以节约公用工程冷量68%。
Aspen plus process simulation software is utilized to study the effect of the volume concentration of acetone in the acetone vapor laden air(VLA) gas,temperature,the initial temperature of the absorbent and the temperature after cooling on the energy consumption and the amount of absorbent in the new water absorption-distillation process.Economic analysis is performed on the single-tower and twin-tower models for the distillation process. Pinch technology is used to design and optimize the heat exchange network of the water absorption-distillation process. It is shown that the numerical simulation results of absorption sensitivity analysis are high consistent with the operation data in the industrialized unit,with the maximum deviation less than 3. 16%. The cooling temperature of VAL feeds and absorbent,and the acetone concentration in VLA gas have a great influence on the energy consumption of the system.On the basis,it is found from the study that single tower model is more advantageous than the double tower model for the absorption-distillation process.Heat exchange network in the system is optimized by pinch technology,which can save68% of cooling capacity in public works.
Aspen plus process simulation software is utilized to study the effect of the volume concentration of acetone in the acetone vapor laden air(VLA) gas,temperature,the initial temperature of the absorbent and the temperature after cooling on the energy consumption and the amount of absorbent in the new water absorption-distillation process.Economic analysis is performed on the single-tower and twin-tower models for the distillation process. Pinch technology is used to design and optimize the heat exchange network of the water absorption-distillation process. It is shown that the numerical simulation results of absorption sensitivity analysis are high consistent with the operation data in the industrialized unit,with the maximum deviation less than 3. 16%. The cooling temperature of VAL feeds and absorbent,and the acetone concentration in VLA gas have a great influence on the energy consumption of the system.On the basis,it is found from the study that single tower model is more advantageous than the double tower model for the absorption-distillation process.Heat exchange network in the system is optimized by pinch technology,which can save68% of cooling capacity in public works.
引文
[1]黄铁檩.醋酸纤维的生产工艺、研究进展及市场分析[J].河南化工,2010,27(13):20-23.
[2]孙美玲,王少锋,项曙光.工业废气中丙酮处理工艺研究进展[J].当代化工,2014,(9):1860-1862,1867.
[3]李立清,唐琳,高招,等.丙酮在活性炭固定床上的吸附穿透曲线数学模拟[J].湖南大学学报:自然科学版,2005,35(2):81-84.
[4]张立平,蒋维钧.渗透气化法分离丙酮水溶液[J].高校化学工程报,1994,8(2):187-189.
[5]Marki E,Lenti B,Vatai G,et al.Clean technology for acetone absorption and recovery[J]. Separation and Purification Technology,2001,22/23:377-382.
[6]Roberto N J,Maria E S T.Replacement of trays by packing to increase the absorption capacity of acetone during cellulose acetate spinning[J].Ind Eng Chem Res,2008,47:8376-8383.
[7]高前进.水吸收-精馏回收废气中丙酮的工艺研究[D].广州:华南理工大学,2010.
[8]张治山,张苗苗,李敏.基于Aspen Plus的丙酮回收系统的模拟优化[J].山东科技大学学报:自然科学版,2011,(1):83-87.
[9]孙美铃.吸收法回收工业废气中丙酮的工艺研究[D].青岛:青岛科技大学,2014.
[10]王军,王长林,高前进.回收微量丙酮的装置及方法:CN,200810028712.9[P].2008-06-30.
[11]王长林,王军,高前进.含微量丙酮空气的双塔集成回收装置和方法:CN,201310161922.6[P].2013-05-03.
[12]高前进.丙酮蒸馏塔的工艺模拟与优化[J].化工生产与技术,2009,16(3):59-61.
[13]冯梦梦.惰性气体对丙酮的抑爆研究[D].太原:中北大学,2016.
[14]山隈瑞树.有机溶剂蒸气着火点和爆炸范围的测定[J].安全工学,2008,47(2):84-91.
[15]Chang Y M,Lee J C,Wu S Y,et al.Elevated pressure and temperature effects on flammabilityhazardassessment foracetoneand watersolutions[J].Journal of Thermal Analysis and Calorimetry,2009,95(2):525-534.
[16]盖恒君,江燕斌,钱宇,等.萃取和溶剂回收系统的全系统优化设计方法[J].高校化学工程学报,2006,20(6):989-995.
[17]Luyben W L. Distillation design and control using ASPEN simulation[M].New Jersey:Wiley,2013.
[18]江燕斌,廉磊,高前进,等.减压汽提式精馏回收稀丙酮水溶液中丙酮的方法:CN,201110006970.9[P].2011-01-04.
[19]Linnhoff B,Hindmarsh E. The pinch design method for exchanger network[J].Chemical Engineer Science,1983,38(5):45-74.
[20]马可,孙铁,张素香.夹点技术在换热网络优化中的应用[J].化学工程师,2013,(9):44-47.
[2]孙美玲,王少锋,项曙光.工业废气中丙酮处理工艺研究进展[J].当代化工,2014,(9):1860-1862,1867.
[3]李立清,唐琳,高招,等.丙酮在活性炭固定床上的吸附穿透曲线数学模拟[J].湖南大学学报:自然科学版,2005,35(2):81-84.
[4]张立平,蒋维钧.渗透气化法分离丙酮水溶液[J].高校化学工程报,1994,8(2):187-189.
[5]Marki E,Lenti B,Vatai G,et al.Clean technology for acetone absorption and recovery[J]. Separation and Purification Technology,2001,22/23:377-382.
[6]Roberto N J,Maria E S T.Replacement of trays by packing to increase the absorption capacity of acetone during cellulose acetate spinning[J].Ind Eng Chem Res,2008,47:8376-8383.
[7]高前进.水吸收-精馏回收废气中丙酮的工艺研究[D].广州:华南理工大学,2010.
[8]张治山,张苗苗,李敏.基于Aspen Plus的丙酮回收系统的模拟优化[J].山东科技大学学报:自然科学版,2011,(1):83-87.
[9]孙美铃.吸收法回收工业废气中丙酮的工艺研究[D].青岛:青岛科技大学,2014.
[10]王军,王长林,高前进.回收微量丙酮的装置及方法:CN,200810028712.9[P].2008-06-30.
[11]王长林,王军,高前进.含微量丙酮空气的双塔集成回收装置和方法:CN,201310161922.6[P].2013-05-03.
[12]高前进.丙酮蒸馏塔的工艺模拟与优化[J].化工生产与技术,2009,16(3):59-61.
[13]冯梦梦.惰性气体对丙酮的抑爆研究[D].太原:中北大学,2016.
[14]山隈瑞树.有机溶剂蒸气着火点和爆炸范围的测定[J].安全工学,2008,47(2):84-91.
[15]Chang Y M,Lee J C,Wu S Y,et al.Elevated pressure and temperature effects on flammabilityhazardassessment foracetoneand watersolutions[J].Journal of Thermal Analysis and Calorimetry,2009,95(2):525-534.
[16]盖恒君,江燕斌,钱宇,等.萃取和溶剂回收系统的全系统优化设计方法[J].高校化学工程学报,2006,20(6):989-995.
[17]Luyben W L. Distillation design and control using ASPEN simulation[M].New Jersey:Wiley,2013.
[18]江燕斌,廉磊,高前进,等.减压汽提式精馏回收稀丙酮水溶液中丙酮的方法:CN,201110006970.9[P].2011-01-04.
[19]Linnhoff B,Hindmarsh E. The pinch design method for exchanger network[J].Chemical Engineer Science,1983,38(5):45-74.
[20]马可,孙铁,张素香.夹点技术在换热网络优化中的应用[J].化学工程师,2013,(9):44-47.