三样条插值在精馏塔设计中的运用  

Application of Cubic Spline Interpolation in the Design of Rectifying Tower

作　　者：张雷[1] 张俊成[1] 

机构地区：[1]西南石油大学化学化工学院,四川成都610500

出　　处：《广州化工》2016年第20期135-137,共3页GuangZhou Chemical Industry

摘　　要：一个好的插值方法在精馏塔设计中理论塔板数的计算中起着足轻重的作用,具有二阶连续导数的三次样条插值(the cubic spline interpolation)能很好的拟合出气液平衡曲线,其平滑性、高精度是其它插值方法所无法比拟的,同时三次条插值没有龙格现象,适用范围特别广泛。本文利用基于采用三次样条插值法visual basic编程获得精馏塔设计中的气液平衡拟合曲线、操作线方程、q线方程、最小回流比及其它相应的参数求得理论塔板数。A good interpolation method plays an important role in calculating the number of theoretical plates. The continuous second derivative＇s cubic spline interpolation can get a good vapor liquid equilibrium fitting curve which smoothness and high precision is unmatched by other interpolation method and the scope of application particularly widespread and without runge phenomenon. Used visual basic programming based on cubic spline interpolation,vapor liquid equilibrium fitting curve,operation line,q line,Minimum reflux ratio and other relevant parameters were discussed and the number of theoretical plates was got.

关 键 词：三样条插值 气液平衡曲线 理论塔板数 

分 类 号：TQ209[化学工程—有机化工]