关键词: 间歇反应, 升温, 预测函数控制, 控制策略

Abstract: This paper proposes a multi-mode control strategies of the sectional heating reactor in nitrile synthesizing. According to the set heating curve and control requirements of the reactor in nitrile synthesizing, three strategies are recommended in three different stages. During the pre-heating process before reaction, strategy of soft manual operation can meet the control requirements of heating rapidly, while in the transition reaction heating stage, strategy of PID adjusting can meet the control requirements of follow smoothly, and in the last stable heating stage which determines the products quality, strategy of predictive functional control can meet the control accuracy. The control system design and implementation are described detailed. Especially, the issue of fluctuation is presented when control strategies change. The running results indicate that the system achieves the design requirements due to its good real-time, low overshoot and short transit-time.

Key words: batch reaction, heating, predictive functional control, control strategy