基于分析改造热泵精馏流程的设计方法  

A shortcut method of heat pump distillation column system revamp based on exergy analysis

作　　者：祝铃钰[1] 李健辉[1] 陈平[1] 

机构地区：[1]浙江工业大学化学工程学院,浙江杭州310014

出　　处：《浙江工业大学学报》2014年第5期483-486,495,共5页Journal of Zhejiang University of Technology

摘　　要：针对热泵—精馏耦合流程提出了工质分凝多级压缩热泵循环策略的简化设计方法.通过平衡分析特定过程的能耗瓶颈,以常规精馏塔的总组合曲线分析不同的中间换热温位和负荷对精馏塔损失的影响,并确定塔内可回收的最大损失,以温熵图确定与精馏塔能级匹配的多级压缩热泵操作条件,并估算压缩机功耗,实现了多级热泵精馏流程的节能优化设计.以丙烯热泵精馏流程为例,对比了采用简化方法和严格模拟确定多级热泵精馏最佳中间换热温位和相应压缩机功耗.结果表明:两种方法获得的最佳中间换热温位基本一致,压缩机功耗的估算值相对误差为4.3%,这说明该简化方法可以用于工程精度要求的热泵精馏流程节能改造.A shortcut design method for integrating a multi-stage heat pump with distillation column system is proposed.Bottleneck of a specified process is analyzed using exergy tools.Column exergy grand composite curve,which is called CEGCC,is used to illustrate the effect of different intermediate duties level on the exergy losses so that the maximum recovering exergy loss can be determined.T-s diagram is utilized to provide multi-stage compressor operating parameters and power consumption.Optimization of this integrated multistage heat pump distillation column then can be calculated with CGECC and T-s diagram.A case of propylene/propane column is studied to compare the shortcut method with rigorous analysis.It is shown that,the optimal temperatures of intermediate duties are similar.The relative error of power consumption is 4.3％.The shortcut method can give an engineering accuracy.

关 键 词：热泵精馏 (火用)分析 简化方法 

分 类 号：TQ028[化学工程]