半连续脂肪酸甲酯化过程的研究(Ⅱ)——操作优化

对半连续脂肪酸甲酯化的操作优化问题进行了研究.定义生产费用为操作优化的目标泛函,选择甲醇进料速率为控制变量、反应压力为控制参数,分别应用动态规划法和Powell法对上述操作优化问题求解.两种方法求解的结果是一致的,采用优化的操作将使生产费用降低5%～15%,特别对有催化的快速甲酯化过程,优化操作的效果更明显.文中还讨论了价格等因素对优化操作策略的影响和求解计算量问题.实验表明,由理论计算得到的优化操作策略和目标是可以实现的.

SEMI-BATCH ESTERIFICATION OF HIGHER FATTY ACID BY METHANOL( Ⅱ ) OPERATION OPTIMIZATION

The optimization of semi-batch esterification of higher fatty acid by methanol is studied by choosing production cost as objective function, methanol feed flux as control variable and reaction pressure as control parameter. Dynamic programming and Powell methods are separately used to solve this problem, and the calculated results are consistent. Calculation shows that optimal operation will reduce the production cost by 5 to 15 percent and higher profit will be gained in the case of catalytic esterification process. The effects of methanol price and operation cost on optimal operation strategies are discussed. The amount of calculation work by using two different methods of solution are compared. It is proved by experiments that the proposed optimal operation strategy as well as its goal can be achieved.