二元恒残液组成提馏式间歇精馏的捷算法  

Shortcut method of binary stripping batch distillation under constant residual fraction composition

作　　者：王为国[1] 段晓玲[2] 曾真[3] 王存文[2] 吴元欣[2] 

机构地区：[1]武汉工程大学化工与制药学院,湖北武汉430074 [2]绿色化工过程教育部重点实验室(武汉工程大学),湖北武汉430074 [3]武汉工程大学机电工程学院,湖北武汉430074

出　　处：《武汉工程大学学报》2014年第1期9-13,共5页Journal of Wuhan Institute of Technology

摘　　要：探讨了二元恒残液组成提馏式间歇精馏在理想操作条件下汽化总量的数值计算方法.采用数值计算方法计算出二元恒残液组成提馏式间歇精馏,给定分离任务理论板数与汽化总量的对应关系,并通过关联计算结果得到其理论板数与汽化总量的近似关系式.对于给定的分离任务,如果已知汽化总量,用该近似关系式计算理论板数与精确解的最大正相对偏差为0.027 1,最大负相对偏差为-0.028 8,平均相对偏差为0.014 6;如果已知理论板数,用该近似关系式计算汽化总量与精确解的最大正相对偏差为0.041 8,最大负相对偏差为-0.035 1,平均相对偏差为0.016 5.因此,该近似关系式具有很好的计算精度.The numerical method for calculating total vapor capacity of binary stripping batch distillation under constant residual fraction composition and ideal operation conditions was explored.The corresponding relationship between the theoretical trays and the total vapor capacity of binary stripping batch distillation under constant residual fraction composition was figured out by the numerical method for given separation tasks,and an approximate relationship between the theoretical trays and the total vapor capacity was set up through correlating the calculated results.For a given separation task,if the total vapor capacity was known,the maximum positive relative deviation and the maximum negative relative deviation between the calculated theoretical trays based on the approximate relationship and the exact solution were 0.027 1 and-0.028 8,respectively,and the average relative deviation was 0.014 6.If the theoretical trays were known,the maximum positive relative deviation and the maximum negative relative deviation between the calculated theoretical trays based on the approximate relationship and the exact solution were 0.041 8 and-0.035 1,respectively,and the average relative deviation was 0.016 5.Therefore,the approximate relationship has a good calculation accuracy.

关 键 词：间歇精馏 恒残液组成 提馏式 捷算法 

分 类 号：TQ015[化学工程]