聚合釜釜温、水温协调控制的仿真研究

Computer Aided Design of the Coordinate Control of Polymerization Furnace's Temperature and Water's Temperature

天津某化工厂从日本引进了一整套聚合釜装置,按原控制方案,釜温达到要求温度时,冷却水温度可达100℃以上,在我国的水质条件下,严重腐蚀水管,造成很大经济损失。为此,我们提出一个新的控制方案——既能保证釜温达到设定值,又能使水温不超过理想值。 首先,用线性和非线性两种辨识方法建立了生产过程的一组模型,通过检验,筛选得到与实际过程拟合较好的数学模型。然后,在分析的基础上提出了对冷却水阀给出下限值、水阍和汽阀协调控制的方案,并对该方案进行了大量的数字仿真,通过仿真证实了方案的可行性,并且给出了具体的控制方案和参数选择的合理范围。最后,在实际装置运行实验,证明该方案是有效的。

A new contorl scheme was put forward for the polymerization furnace plant. Non-linear system identification methods were used to set up the mathematical model of the furnace at first; and then the coordinate control scheme with water valve and vapour valve cooperation was put forward. The value of the parameter in the scheme could be chosen through simulation study. Experiments on the real equipment have proved the effect of the scheme.