乙醇超重力MVR热泵精馏系统仿真及优化研究  

Simulation and Optimization Study of Ethanol-Water High Gravity MVR Heat Pump Distillation System

作　　者：赵林 吴小华 孙东亮 杨鲁伟[2] ZHAO Lin;WU Xiao-Hua;SUN Dong-Liang;YANG Lu-Wei(Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil&Gas Development,School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Beijing Key Laboratory of Thermal Science and Technology,Institute of physical and chemical technology,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]北京石油化工学院机械工程学院,深水油气管线关键技术与装备北京市重点实验室,北京102617 [2]中国科学院理化技术研究所热力过程节能技术北京市重点实验室,北京100190

出　　处：《工程热物理学报》2022年第3期679-684,共6页Journal of Engineering Thermophysics

基　　金：中国科学院低温工程学重点实验室开放基金(No.CRYO201912);长城学者培养计划(No.CIT&TCD20180313)。

摘　　要：针对超重力MVR热泵精馏模拟研究少的现状,对于乙醇–水这一典型非理想物系,基于Aspen Plus中重力场精馏塔非平衡级模型,通过编译和调用体积传质和相界面积参数Fortran子程序,构建了超重力精馏塔数学模型。在变回流比和进料位置两组工况下,进行了超重力MVR热泵精馏系统仿真模拟,将仿真结果与文献中实验结果进行了对比,发现塔顶产品质量分数x_(D)的平均误差为0.74%,系统能效比COP的平均误差为9.52%,单位能耗蒸发量SMER的平均误差为13.26%,表明所建立的仿真模型具有较好的准确性,可用于超重力MVR热泵精馏系统仿真。以处理量为0.3 m^(3)/h的超重力MVR热泵精馏系统为例,基于单一变量法,分析了运行参数对系统传质效果和能耗的影响,结果表明系统最佳回流比为6.8,最佳进料位置为第15块塔板,最佳转速为3000 r/min。The thesis focuses on the current situation where there are relatively few simulation studies on the high-gravity MVR heat pump distillation system.For the typical non-ideal system of ethanol-water,based on the non-equilibrium stage model of the gravity field distillation column in the Aspen Plus simulation software,the volume transfer is compiled and transferred.The Fortran subroutine of the parameters of mass and phase boundary area constructs the mathematical model of the supergravity distillation column.Under the two working conditions of changing the reflux ratio and changing the feed position,the simulation of the high-gravity MVR heat pump rectification system is carried out,and the simulation results are compared with the experimental results in the literature.The results show that:The average error for the mass fraction x_(D) is 0.74%,for the system COP is 9.52%,and for the system SMER is 13.26%.This shows that the established simulation model can be used for the simulation of the high-gravity MVR heat pump distillation system.Taking a processing capacity of 0.3 m^(3)/h as an example,based on the single variable method,the influence of operating parameters on the mass transfer effect and energy consumption of the system is analyzed.The results show that the optimal reflux ratio of the system is 6.8,the optimal feeding position is the 15th tray,and the optimal rotation speed is 3000 r/min.

关 键 词：机械蒸汽再压缩 热泵 超重力精馏 乙醇 仿真 

分 类 号：TQ021.4[化学工程]