模拟移动床的控制系统设计和优化

为了满足现代工业色谱分离的要求，对模拟移动床（SMB）色谱分离的工艺流程进行了改进，设计了一套由工控机、西门子PLC、变频器和智能仪表构成的模拟移动床集散控制系统，提高了系统的自动化水平。用改进的BP神经网络对苯丙氨酸模拟移动床的色谱分离过程进行了建模，并根据所建的模型，用实数编码的遗传算法对分离参数和操作条件进行了优化。在开发过程中，上位机软件采用了国产“组态王”和VB相结合的方式，克服了“组态王”命令语言环境较弱的缺点。该方法在苯丙氨酸生产中得到应用，使得产品的纯度和回收率都得到了较大的提高。

Design of SMB control system and optimization

In order to satisfy the need of modern industrial chromatogram separation, the technical flow of SMB chromatogram separation was improved. A SMB distributed control system, which was made up of computer, PLC, transducer and intelligent instruments, was designed. With improved BP neural network, the model of phenylalanine SMB separation is established. According to this model, the separate parameter and operate condition are optimized with real coded Genetic algorithm. In order to overcome the shortcoming of weak command language condition of "kingview" , the "kingview" was combined with VB in software. It has been applied successfully, and the purity and recovery of phenylalanine exceed 98% in practice production.