内部热耦合精馏塔的操作性能与模拟  

Operation performance and simulation of internally heat-integrated distillation column

作　　者：李春利[1] 陈媛[1] 张林[1] 闫磊[1] 

机构地区：[1]河北工业大学化工学院,天津300130

出　　处：《化工进展》2015年第11期3879-3885,共7页Chemical Industry and Engineering Progress

基　　金：河北省高等学校科学技术研究重点项目(15964505D)

摘　　要：对同轴式内部热耦合精馏塔的操作性能和节能效果进行了研究,考察了全回流操作条件下,压缩比对回流量、冷凝器负荷和再沸器负荷的影响。结果表明,随着压缩比的增大,回流量、冷凝器负荷和再沸器负荷均降低。通过实验数据计算得到了该塔的理论板数和两塔间的传热量,精馏段为9块理论板,提馏段为4块理论板,当压缩比为2.2∶1时,两塔间传热量为9.98k W。连续操作条件下,对内部热耦合精馏塔的节能效果进行了分析,通过与常规精馏塔的比较,内部热耦合精馏塔可节约52.3%的冷量,输入的再沸器和压缩机总负荷可节约20.34%。另外,基于实验数据,对该内部热耦合精馏塔进行了动态模拟,经连续操作下的实验验证,该内部热耦合精馏塔可在2h后达到稳定操作。Operational performance and energy-efficiency were studied on a concentric structured internally heat-integrated distillation column. At total reflux,pressure ratio affected reflux rate, condenser duty and reboiler duty. Reflux rate,condenser duty and reboiler duty decreased with the increase of pressure ratio. Furthermore,theoretical plates and heat transfer rate of the internally heat-integrated distillation column were determined based on experimental data,9 theoretical plates in the rectifying section and 4 theoretical plates in the stripping section. The heat transfer rate between rectifying and stripping sections was 9.98 kW when pressure ratio was 2.2∶1. During continuous operation,energy efficiency of internally heat-integrated distillation column was measured experimentally. Compared with conventional distillation column,the saving of cooling capacity consumption of internally heat-integrated distillation column could be up to 52.3%,and the total heat duty of reboiler and compressor could be decreased by 20.34%. In addition,dynamic simulation was conducted based on experimental data,and the internally heat-integrated distillation column could reach steady state in 2 hours.

关 键 词：精馏 内部热耦合精馏 节能 传热 模拟 

分 类 号：TQ028[化学工程]