高校化学工程学报2011，Vol.25Issue(1)：136-142,7.
新型精馏-蒸发-热泵集成系统开车过程的操作策略与动态行为
Operation Strategy and Dynamical Behavior of a Novel Distillation-Evaporation-Heat Pump Integrated System in Start-up Stage
周禹成 1吴嘉 1林龙勇1
作者信息
- 1. 浙江大学,化学工程与生物工程学系,浙江,杭州,310027
- 折叠
摘要
Abstract
A new process (DVH) for separating the liquid extract of natural polysaccharides was proposed.The distillation process which separates ethanol from the extract and the evaporation process which concentrates the remained polysaccharide solution were integrated into a single column by introducing a vapor side withdraw in a position near the bottom . With a heat pump (steam-jet pump), the latent heat of side withdraw was integrated into reboiler. The above means reduces an evaporator and saves obviously energy consumption comparing to the traditional process. A steady-state simulation with Aspen Plus shows that the steam consumption under stable operation decreases by more than 34％. In the present work, the startup strategy and corresponding operation schedule were designed for DVH integrated system and the dynamical behavior of the system in startup stage was simulated and analyzed with Aspen Custom Modeler and Aspen Dynamics,which verifies the feasibility of the strategy and gives the profiles of system state variables with time and the better operation parameters. Finally, by optimizing the time schedule and concentration of withdrawing products,waste drainage in startup stage was eliminated completely, which gives advantages in process economics and environment protection.关键词
精馏/蒸发/热泵/过程集成/动态模拟Key words
distillation/ evaporation/ heat pump/ process integration/ dynamical simulation分类
化学化工引用本文复制引用
周禹成,吴嘉,林龙勇..新型精馏-蒸发-热泵集成系统开车过程的操作策略与动态行为[J].高校化学工程学报,2011,25(1):136-142,7.
