Schramm Henning, Grüner Stefan, Kienle Achim
Max-Planck-Institut Dynamik Komplexer Technischer Systeme, Sandtorstrasse 1, D-39106 Magdeburg, Germany.
J Chromatogr A. 2003 Jul 18;1006(1-2):3-13. doi: 10.1016/s0021-9673(03)00946-4.
In this contribution, simple methods are presented for controlling a simulated moving bed (SMB) chromatographic process with standard PI (proportional integral) controllers. The first method represents a simple and model-free inferential control scheme which was motivated from common distillation column control. The SMB unit is equipped with UV detectors. The UV signals in the four separation zones of the unit are fixed by four corresponding PI controllers calculating the ratio of liquid and solid flow in the respective separation zone. In order to be able to adjust the product purity a second, model-based control scheme is proposed. It makes use of the nonlinear wave propagation phenomena in the apparatus. The controlled chromatographic unit is automatically working with minimum solvent consumption and maximum feed throughput--without any numerical optimization calculations. This control algorithm can therefore also be applied for fast optimization of SMB processes.
本文介绍了用标准比例积分（PI）控制器控制模拟移动床（SMB）色谱过程的简单方法。第一种方法是一种简单的无模型推断控制方案，它源自常见的精馏塔控制。SMB单元配备了紫外线探测器。该单元四个分离区的紫外线信号由四个相应的PI控制器固定，这些控制器计算各自分离区中液体和固体流量的比率。为了能够调节产品纯度，提出了第二种基于模型的控制方案。它利用了装置中的非线性波传播现象。受控色谱单元能自动以最低溶剂消耗和最大进料通量运行——无需任何数值优化计算。因此，这种控制算法也可用于SMB过程的快速优化。
