精馏过程的自由度  

Degree of Freedom of Distillation Process

作　　者：赵平[1] 张月萍[1] 

机构地区：[1]河北科技大学化学与制药工程学院,河北石家庄050018

出　　处：《化工高等教育》2013年第3期72-75,共4页Higher Education in Chemical Engineering

基　　金：河北省精品课程建设项目

摘　　要：本文分析了精馏过程变量和精馏过程的关联方程式,讨论了精馏的设计型问题和操作型问题中的自由变量,提出双组分连续精馏过程自由度为7,不涉及物料数量时自由度为6。已知自由变量个数与自由度数相符时,在精馏过程达到定态平衡后得到唯一结果。不适宜进料的说法不适于定态精馏操作的讨论,开工、停工、操作参数调整等非定态操作时出现不适宜进料。The variables and the relative equations of distillation process are analyzed, and the free varia- bles in design and operation are discussed. The degree of freedom is 7 for continuous distillation process with two components, but becomes 6 if the amount of material is drawn out. If the free variable number agrees with the degree of freedom, there will be only one result when the distillation process achieves steady equilibrium. Unfit feed position which is not fit for the distillation operation at steady state ap- pears within the operation at unsteady state of start, stop and adjusting the operation parameters.

关 键 词：单元操作 精馏 自由度 不适宜进料 

分 类 号：TQ028.13-4[化学工程] G642[文化科学—高等教育学]