アルゴン蒸留プロセスの数式モデルと収率向上化のための最適制御システムの開発

抄録

In the argon distillation columun, the argon-yield rate increases to some values in proportion to the nitrogen concentration in its source gas from the oxygen columun, but it decreases after the nitrogen concentration exceeds a certain value. Therefore, for the improvement of the argon-yield rate, it is important to stabilize the nitrogen concentration to the desired value. For realizing this control, an indirect continuous measurement method of the nitrogen concentration, mathematical auto-regressive models with dead time of the process and an optimal control system of the plant have been developed, and the improvement of about 3% has been confirmed by their practical applications to a high pressure type of plant.